CSA B140.4-04 - Oil-fired warm air furnaces (update No. 2, 2007- reaffirmed 2014) 1553975154

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B140.4-04 (reaffirmed 2014)

Oil-fired warm air furnaces

Legal Notice for Standards Canadian Standards Association (operating as “CSA Group”) develops standards through a consensus standards development process approved by the Standards Council of Canada. This process brings together volunteers representing varied viewpoints and interests to achieve consensus and develop a standard. Although CSA Group administers the process and establishes rules to promote fairness in achieving consensus, it does not independently test, evaluate, or verify the content of standards.

Disclaimer and exclusion of liability This document is provided without any representations, warranties, or conditions of any kind, express or implied, including, without limitation, implied warranties or conditions concerning this document’s fitness for a particular purpose or use, its merchantability, or its non-infringement of any third party’s intellectual property rights. CSA Group does not warrant the accuracy, completeness, or currency of any of the information published in this document. CSA Group makes no representations or warranties regarding this document’s compliance with any applicable statute, rule, or regulation. IN NO EVENT SHALL CSA GROUP, ITS VOLUNTEERS, MEMBERS, SUBSIDIARIES, OR AFFILIATED COMPANIES, OR THEIR EMPLOYEES, DIRECTORS, OR OFFICERS, BE LIABLE FOR ANY DIRECT, INDIRECT, OR INCIDENTAL DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES, HOWSOEVER CAUSED, INCLUDING BUT NOT LIMITED TO SPECIAL OR CONSEQUENTIAL DAMAGES, LOST REVENUE, BUSINESS INTERRUPTION, LOST OR DAMAGED DATA, OR ANY OTHER COMMERCIAL OR ECONOMIC LOSS, WHETHER BASED IN CONTRACT, TORT (INCLUDING NEGLIGENCE), OR ANY OTHER THEORY OF LIABILITY, ARISING OUT OF OR RESULTING FROM ACCESS TO OR POSSESSION OR USE OF THIS DOCUMENT, EVEN IF CSA GROUP HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES. In publishing and making this document available, CSA Group is not undertaking to render professional or other services for or on behalf of any person or entity or to perform any duty owed by any person or entity to another person or entity. The information in this document is directed to those who have the appropriate degree of experience to use and apply its contents, and CSA Group accepts no responsibility whatsoever arising in any way from any and all use of or reliance on the information contained in this document. CSA Group is a private not-for-profit company that publishes voluntary standards and related documents. CSA Group has no power, nor does it undertake, to enforce compliance with the contents of the standards or other documents it publishes.

Intellectual property rights and ownership As between CSA Group and the users of this document (whether it be in printed or electronic form), CSA Group is the owner, or the authorized licensee, of all works contained herein that are protected by copyright, all trade-marks (except as otherwise noted to the contrary), and all inventions and trade secrets that may be contained in this document, whether or not such inventions and trade secrets are protected by patents and applications for patents. Without limitation, the unauthorized use, modification, copying, or disclosure of this document may violate laws that protect CSA Group’s and/or others’ intellectual property and may give rise to a right in CSA Group and/or others to seek legal redress for such use, modification, copying, or disclosure. To the extent permitted by licence or by law, CSA Group reserves all intellectual property rights in this document.

Patent rights Attention is drawn to the possibility that some of the elements of this standard may be the subject of patent rights. CSA Group shall not be held responsible for identifying any or all such patent rights. Users of this standard are expressly advised that determination of the validity of any such patent rights is entirely their own responsibility.

Authorized use of this document This document is being provided by CSA Group for informational and non-commercial use only. The user of this document is authorized to do only the following: If this document is in electronic form: sLOADTHISDOCUMENTONTOACOMPUTERFORTHESOLEPURPOSEOFREVIEWINGIT sSEARCHANDBROWSETHISDOCUMENTAND sPRINTTHISDOCUMENTIFITISIN0$&FORMAT Limited copies of this document in print or paper form may be distributed only to persons who are authorized by CSA Group to have such copies, and only if this Legal Notice appears on each such copy. In addition, users may not and may not permit others to sALTERTHISDOCUMENTINANYWAYORREMOVETHIS,EGAL.OTICEFROMTHEATTACHEDSTANDARD sSELLTHISDOCUMENTWITHOUTAUTHORIZATIONFROM#3!'ROUPOR sMAKEANELECTRONICCOPYOFTHISDOCUMENT If you do not agree with any of the terms and conditions contained in this Legal Notice, you may not load or use this document or make any copies of the contents hereof, and if you do make such copies, you are required to destroy them immediately. Use of this document constitutes your acceptance of the terms and conditions of this Legal Notice.

Update No. 2 CAN/CSA-B140.4-04 July 2007 Note: General Instructions for CSA Standards are now called Updates. Please contact CSA Information Products Sales or visit www.ShopCSA.ca for information about the CSA Standards Update Service. Title: Oil-fired warm air furnaces — originally published September 2004 Revisions issued: Update No. 1 — February 2006 If you are missing any updates, please contact CSA Information Products Sales or visit www.ShopCSA.ca. The following revisions have been formally approved and are marked by the symbol delta (Δ) in the margin on the attached replacement pages: Revised

Clauses 7.6.4.1–7.6.4.4 and Table 3

New

Clauses 7.6.3.8–7.6.3.11, 7.6.4.5–7.6.4.11, and 8.4–8.6

Deleted

None

CAN/CSA-B140.4-04 originally consisted of 73 pages (x preliminary and 63 text), each dated September 2004. It now consists of the following pages: September 2004

v–x, 1–28, 31, 32, 35–42, and 45–63

February 2006

Cover, National Standards of Canada text, title page, and copyright page

July 2007

iii, iv, 29–30A, 33–34A, 43, and 44

• Update your copy by inserting these revised pages. • Keep the pages you remove for reference.

© Canadian Standards Association

Δ

Oil-fired warm air furnaces

Contents Technical Committee on Oil-Burning Appliance Standards vi Subcommittee on Oil-Fired Warm Air Furnaces viii Preface ix Foreword x 1 Scope 1 2 Reference publications and definitions 2 2.1 Reference publications 2 2.2 Definitions 2 3 General requirements 2 3.1 General 2 3.2 Oil burner 3 3.3 Electrical features 3 3.4 Methods of assembly and shipment 3 4 Construction 4 4.1 General 4 4.2 Combustion products 4 4.3 Accessibility of parts 4 4.4 Location of fuel lines and fuel components 5 4.5 Casings (jackets) and liners 5 4.6 Air-circulating blowers 6 4.7 Air filters 6 4.8 Lubrication 7 4.9 Openings into combustion chamber and flue passages 7 4.10 Flue gas passages 7 4.11 Vent (flue) collars 7 4.12 Draft regulators 8 4.13 Primary and secondary heating surfaces 8 4.14 Pressure-relief openings 9 4.15 Observation of the flame zone 9 4.16 Combustion chambers 9 4.16.1 Refractory material 9 4.16.2 Metal combustion chambers 10 4.16.3 Simulated life test 10 4.16.4 Simulated endurance test 10 4.17 Flue baffles and flame baffles 10 4.18 Insulating materials 10 4.19 Temperature limit controls 11 4.20 Horizontal furnaces and unit heaters 11 5 Marking 12 5.1 General 12 5.2 Installation clearances 13 5.3 Field-mounted burners 13 5.4 Blower motors 14 5.5 Bases for downflow furnaces 14 July 2007 (Replaces p. iii, September 2004)

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B140.4-04

© Canadian Standards Association

6 Instructions 14 6.1 General 14 6.2 Installation and service manual 15 6.3 Operating instructions and homeowner instructions 16 6.4 Additional homeowner instructions 16 7 Normal tests 17 7.1 General 17 7.2 Combustion 18 7.2.1 Test requirements 18 7.2.2 Test procedures 18 7.3 Rated output capacity 19 7.3.1 Test requirements 19 7.3.2 Test procedures 20 7.3.3 Determination of rated output capacity 21 7.4 Temperature limit control performance 22 7.4.1 Test requirements 22 7.4.2 Test procedures 22 7.5 Continuity of operation 24 7.5.1 Test requirements 24 7.5.2 Test procedures 24 7.6 Operating temperatures 24 7.6.1 Test requirements 24 7.6.2 Test enclosures 25 7.6.3 Installation methods 28 7.6.4 Test procedures 29 7.7 Motor rating — Air-circulating blowers and fans 30 7.7.1 Test requirements 30 7.7.2 Test procedures 30A 7.8 Seepage 30A 7.9 Flooding 30A 7.10 High static pressures 31 7.10.1 Test requirements 31 7.10.2 Test procedure 31 8 Abnormal tests 31 8.1 General 31 8.2 Abnormal operation temperatures 32 8.3 Abnormal vent outlet pressures 33 8.4 Abnormal voltage 34 8.5 Flooded pot burn-off 34 8.6 Power failure 34 9 Burner tests 34A 9.1 Vaporizing-type burners 34A 9.2 Atomizing-type burners 34A 10 Oil-fired heating/cooling appliances primarily for outdoor installation 34A 10.1 General 34A 10.2 Construction requirements 34A 10.2.1 General 34A 10.2.2 Assembly 34A 10.2.3 Accessibility 35 10.2.4 Combustion air and ventilation 35 10.2.5 Main flame observation 36

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July 2007 (Replaces p. iv, September 2004)

© Canadian Standards Association

Oil-fired warm air furnaces

7.6.3.5 For forced-air furnaces, the plenum or bonnet and the test ducts required in Clause 7.3.2.2 shall be installed.

7.6.3.6 The vent connector (flue pipe) shall be the same nominal size as the vent collar of the appliance. Black stove pipe not heavier than No. 24 gauge shall be used for the purpose of these tests, and all joints shall be sealed.

7.6.3.7 When required, a suitable draft regulator shall be provided for test purposes and shall be located outside the test enclosure (see Clause 4.12). A draft regulator forming an integral part of the equipment shall be sealed, and a separate regulator shall be provided for test purposes. Δ

7.6.3.8 When the vent connector (flue pipe) passes through an enclosure partition, a suitable insulation thimble shall be used as indicated in CSA B140.0.

Δ

7.6.3.9 When inlet-air ducts and outlet-air ducts are used, they shall be extended to outside of the test enclosure. When the outlet-air ducts pass through an enclosure partition, a suitable clearance shall be provided. Such clearances shall be sealed with tape or insulating material.

Δ

7.6.3.10 The appliance shall be levelled. Levelling means, if detachable, shall be removed. If the levelling means is not detachable, it shall be adjusted to provide the minimum clearance to the floor panel.

Δ

7.6.3.11 The test methods used for determining the inlet-air and outlet-air temperatures shall be as specified in Clause 7.3 for forced-air furnaces.

Δ

7.6.4 Test procedures 7.6.4.1 The appliance shall be operated under the conditions specified for the rated output capacity test of Clause 7.3, except as stated herein. All temperature tests shall be carried out at the maximum permissible smoke (Shell-Bacharach smoke spot of No. 1 for fuel grades of No. 2 and lighter, and a No. 4 smoke spot for fuel grades of No. 4 and heavier).

7.6.4.2 All limit controls shall be bypassed to permit continuous operation during the test.

7.6.4.3 For appliances equipped with integral temperature limit controls, the air temperature rise shall be maintained during the test at that value corresponding to TL – 25 °C (TL – 77°F), where TL is the outlet-air temperature at which the temperature limit control functioned, as determined in the temperature limit control performance test of Clause 7.4 (see also Clause 7.6.4.4).

7.6.4.4 If the value of TL – 25 °C (TL – 77°F) in Clause 7.6.4.3 is less than 47 °C (85°F), an air temperature rise of 47 °C (85°F) shall be used and shall be maintained during the test.

July 2007 (Replaces p. 29, September 2004)

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© Canadian Standards Association

7.6.4.5 For appliances not equipped with integral temperature limit controls, such as an appliance when the control is field-mounted on the plenum or bonnet, the air temperature rise (based on a nominal inlet-air temperature of 25 °C (77°F)) shall be maintained during the test at (a) 96 °C (173°F) for an appliance equipped with a temperature limit control that does not permit an outlet-air temperature in excess of 121 °C (250°F); or (b) 68 °C (123°F) for an appliance equipped with a temperature limit control that does not permit an outlet-air temperature in excess of 93 °C (200°F).

7.6.4.6 The air temperature rise shall be established by gradually restricting the circulating air flow, using the procedure specified in Clause 7.4.2.5, until the air temperature rise reaches the appropriate value specified in Clause 7.6.4.3, 7.6.4.4, or 7.6.4.5, ± 3 °C (5°F). The circulating air flow shall then be regulated to maintain the appropriate air temperature rise during the test. Note: The above test may also be conducted by adjusting the speed or air delivery of the air circulating blower to produce the required outlet-air temperature.

7.6.4.7 For forced-air furnaces, the appropriate external static pressure specified in Table 3, to be measured at the supply plenum, shall be maintained throughout the test.

7.6.4.8 The following conditions shall be observed throughout the test: (a) the variation in fuel input shall not exceed ± 2%; (b) the burner firing conditions shall remain stable, as indicated by consistent chimney drafts, smoke density, and vent gas temperature readings; and (c) for forced-air furnaces, (i) the air temperature rise shall be maintained at the appropriate value ± 3 °C (± 5°F); and (ii) the variation in static pressure shall not exceed ± 5 Pa (± 0.02 in wc) from the specified static pressure.

7.6.4.9 The test shall be continued until equilibrium temperatures have been attained, as evidenced by consistent values being obtained for three consecutive sets of readings taken at 15 min intervals. The temperatures shall be recorded at regular intervals throughout the test.

7.6.4.10 The maximum temperatures attained, especially by the heat exchanger and combustion chamber, before the blower starts to circulate the air and when the blower control is adjusted to maximum setting, shall comply with the requirements specified in Clause 7.6.1.5.

7.6.4.11 Tests for minimum heat exchanger temperatures shall be conducted with the appliance operating at the minimum fuel input and at the recommended temperature rise.

7.7 Motor rating — Air-circulating blowers and fans 7.7.1 Test requirements 7.7.1.1 The brake load imposed on the motor under the test conditions specified in Clause 7.7.2 shall not exceed the kW (hp) rating of the motor.

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July 2007 (Replaces p. 30, September 2004)

© Canadian Standards Association

Oil-fired warm air furnaces

7.7.1.2 When the ambient air temperature at the blower motor exceeds (a) 30 °C (86°F) for motors rated less than 746 W (fractional horsepower motors); or (b) 40 °C (104°F) for motors rated at or more than 746 W (integral horsepower motors), the motor winding temperatures shall not exceed the maximum values specified in CSA C22.2 No. 3, and the motor shall be acceptable on a non-interchangeable basis when tested under the conditions specified in Clause 7.7.2.

7.7.2 Test procedures 7.7.2.1 The appliance shall be operated at maximum fuel input, with all controls bypassed to permit continuous operation during the test. The circulating air blower speed, when adjustable, shall be adjusted to deliver the maximum available air volume using the combination of pulleys provided. The blower motor shall be operated at rated voltage and frequency. An external static pressure shall be imposed by a restriction symmetrically applied at the end of each outlet-air duct, as specified in Table 4.

7.7.2.2 For an appliance having a rated output capacity in excess of 88 kW (300 000 Btu/h), the external static pressure to be used for this test shall be determined by special investigation.

7.7.2.3 The required static pressure shall be measured at the supply plenum as specified in Clause 11.

7.7.2.4 The static pressure values given in Table 4 shall not apply to those appliances intended for use without ductwork, air filters, or for use with limited duct systems. For such appliances, the value of static pressure selected for this test shall be based on the intended application of the appliance.

7.7.2.5 The static pressure values given in Table 4 shall not apply to special appliance designs. The values of static pressure selected for this test shall be based upon consideration of the equipment design and the intended application.

7.7.2.6 For propeller-type unit heaters, the louvres, when provided, shall be adjusted to impose the maximum motor loading.

7.8 Seepage In the event of ignition failure, the resulting unburnt fuel shall not leak through the bottom of the heat exchanger when the fuel has flowed into the appliance at maximum input for 5 min.

7.9 Flooding 7.9.1 The flooding test shall be applied to appliances equipped with vaporizing burners.

July 2007

30A

© Canadian Standards Association

Oil-fired warm air furnaces

For appliances intended for placement on combustible floors, the temperature limit shall apply to the floor beneath and within 0.9 m (3 ft) of the appliance, plenums, and ducts. The temperature limit shall apply to overhead structures above and within 0.9 m (3 ft) of the appliance, plenum, and ducts.

8.2.10 For attic furnaces and for appliances intended for installation with no (zero) clearance to the surrounding combustible construction of the enclosure, the temperature limit specified in Clause 8.2.9 shall apply to the outer casing of the appliance being tested.

8.2.11 Following the one-hour period specified in Clause 8.2.8, for each test, the temperatures referred to in Clauses 8.2.8 to 8.2.10 shall not exceed the limits specified for normal operation in CSA B140.0. Note: The degree of hazard involved will be the basis of interpretation of Clause 8.2.11, e.g., temperatures of components located within the return-air compartment may be considered as most critical because of their location in an air-circulating duct system.

8.3 Abnormal vent outlet pressures 8.3.1 The ignition and operation of the appliance shall be safe and reliable under abnormal vent outlet pressure conditions.

8.3.2 Under abnormal vent outlet pressure conditions, only a momentary pulsation is permissible following ignition and/or shutdown. The test shall be started with cold appliances.

8.3.3 For the purpose of this test, the abnormal vent outlet pressure conditions include vent outlet pressures that shall be from (a) –5 to –20 Pa (–0.02 to –0.08 in wc) for appliances with rated output capacity up to 47 kW (160 000 Btu/h); and (b) –7.5 to –30 Pa (–0.03 to –0.12 in wc) with rated output capacity in excess of 47 kW (160 000 Btu/h).

8.3.4 For appliances that are intended to be used without a draft regulator, the vent outlet pressures shall be (a) –5 to –30 Pa (–0.02 to –0.12 in wc) for appliances with rated output capacity up to 47 kW (160 000 Btu/h); and (b) –7.5 to –37 Pa (–0.03 to –0.15 in wc) with rated output capacity in excess of 47 kW (160 000 Btu/h).

8.3.5 The requirements given in Clauses 8.3.3 and 8.3.4 are based on the anticipated normal vent outlet pressure of (a) –10 Pa (–0.04 in wc) for most residential installations that are rated less than 88 kW (300 000 Btu/h) output; and (b) –15 Pa (–0.06 in wc) for residential installations that are rated in excess of 88 kW (300 000 Btu/h) output. Special consideration shall be required for equipment intended primarily for commercial or industrial applications. The recommended vent outlet pressure value given in the manufacturer’s installation instructions shall be used in determining suitable abnormal vent outlet pressure value in these instances.

July 2007 (Replaces p. 33, September 2004)

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B140.4-04

Δ

© Canadian Standards Association

8.4 Abnormal voltage 8.4.1 The ignition and operation of appliances equipped with electrical features shall be safe and reliable at any voltage between 85 and 110% of rated voltage. Note: See also Clause 9.

8.4.2 For the purpose of this test, the rated voltage shall be 120 V for “rated” voltages of 110 to 120 V and 240 V for “rated” voltages of 220 to 240 V. Note: The rated voltage referred to in quotation marks, i.e., “rated”, is the voltage specified on the nameplate(s) of the equipment or the components.

Δ

8.5 Flooded pot burn-off 8.5.1 Appliances equipped with vaporizing type burners shall not create a hazard when the fuel in the burner pot is ignited after a flooded pot condition has been established.

8.5.2 The equipment shall be installed in the appropriate test enclosure described in Clause 7.6.2.

8.5.3 The test shall be conducted on the basis of the following procedure. The oil in the burner pot shall be ignited after a flooded pot condition has been established. The metering valve shall be left open at its maximum setting. All limit controls shall be operative. The test shall be continued until normal operating conditions have been re-established.

8.5.4 There shall be no hazardous discharge of flame or products of combustion during the test, nor the creation of any phenomena that would lead to unsafe performance of the appliance. There shall be no deleterious effects to the materials and components of the equipment (e.g., the heat exchanger, the insulation, etc.), or to the adjacent combustible construction, as a result of the test. Δ

8.6 Power failure 8.6.1 Appliances equipped with electrical features shall continue to operate safely, or shall shut down in the event of power failure, and shall operate safely upon the resumption of power.

8.6.2 The equipment shall be installed in the appropriate test enclosure described in Clause 7.6.2.

8.6.3 There shall be no deleterious effects on the materials and components of the equipment (e.g., the heat exchanger, the insulation, etc.), or on the adjacent combustible constructions, as a result of the test, nor the creation of any phenomena that would lead to unsafe operation of the appliance.

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July 2007 (Replaces p. 34, September 2004)

© Canadian Standards Association

Oil-fired warm air furnaces

9 Burner tests 9.1 Vaporizing-type burners Vaporizing-type burners provided with appliances shall meet the test requirements of CSA B140.1, including ignition, seepage, and other burner and component tests that are applicable.

9.2 Atomizing-type burners Atomizing-type burners provided with appliances shall meet the test requirements of CAN/CSA-B140.2.1, including ignition, after-drip, pressure, and other burner and component tests that are applicable.

10 Oil-fired heating/cooling appliances primarily for outdoor installation 10.1 General 10.1.1 These are additional requirements that apply to oil-fired heating appliances and to combination heating/cooling appliances (hereafter referred to as appliances) primarily intended for outdoor installation.

10.1.2 These requirements also apply to oil-fired appliances that have gas-fired pilots and to oil-fired appliances that may be gas-fired as an alternative, except that the requirements for the gas features of such appliances are covered by ANSI Z21.47/CSA 2.3.

10.2 Construction requirements 10.2.1 General 10.2.1.1 The appliances shall comply with the specific Standards relating to the type of equipment involved.

10.2.1.2 Appliances shall be constructed entirely of new, unused parts and materials.

10.2.1.3 All components requiring protection from climatic conditions shall be adequately protected.

10.2.1.4 An appliance that requires a venting system and that is not suitable for use with a conventional system shall be provided with a system as part of the appliance. Venting systems that are a part of the appliance shall be provided with means for secure attachment to the appliance.

10.2.2 Assembly The appliance, if not completely assembled by the manufacturer, shall be arranged in as few sub-assemblies as practicable. Each sub-assembly shall be capable of being incorporated readily into the final assembly without requiring alteration, cutting, drilling, threading, welding, or similar tasks by the installer. In the case of two or more sub-assemblies, each of which must bear a definite relationship to each other for the proper and safe operation of the equipment, they shall be arranged and constructed to allow and

July 2007

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© Canadian Standards Association

Oil-fired warm air furnaces

Table 1 Thickness of plain carbon steel for heat exchangers (See Clauses 4.11.5, 4.13.3, and 4.13.4.) Rated output capacity, kW (Btu/h)

Minimum thickness, mm (in)

Manufacturer’s standard gauge

Up to 22 (75 000)

1.06 (0.0418)

18

Over 22 to 58 (75 000 to 200 000)

1.34 (0.0528)

16

Over 58 to 117 (200 000 to 400 000)

1.69 (0.0667)

14

Over 117 (400 000)

See Clause 4.13.5

—

Table 2 Minimum permissible vent outlet pressure (See Clause 7.2.2.5.)

Δ

Rated output capacity, kW (Btu/h)

Minimum permissible vent outlet pressure, Pa (in wc)

Up to 47 (160 000)

–10 (–0.04)

Over 47 to 117 (160 000 to 400 000)

–15 (–0.06)

Table 3 External static pressures for the rated output capacity test (See Clauses 5.1.2, 7.3.2.8, 7.3.2.10, 7.4.2.8, 7.4.2.11, 7.6.4.7, and 8.2.4.) Rated output capacity, kW (Btu/h)

External static pressure, Pa (in wc)

Up to 47 (160 000)

50 (0.20)

Over 47 up to 88 (160 000 up to 300 000)

62 (0.25)

Over 88 (300 000)

Refer to Clause 7.3.2.9

Table 4 External static pressure for the blower motor rating test (See Clauses 7.7.2.1, 7.7.2.4, 7.7.2.5, and 7.10.2.) Rated output capacity, kW (Btu/h)

External static pressure, Pa (in wc)

Up to 47 (160 000)

50 (0.20)

Over 47 up to 88 (160 000 up to 300 000)

62 (0.25)

Over 88 (300 000)

Refer to Clause 7.7.2.2

July 2007 (Replaces p. 43, September 2004)

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B140.4-04

© Canadian Standards Association

Inlet-air duct

Flue-gas analysis (see text for details)

Inlet-air temperature (see Figure 3)

Plane of outlet-air temperature measurement (see Figure 4) Adjustable symmetrical air-damper

Shield Outlet-air duct

Appliance

Static pressure gauge tube to be flush with inside duct wall

Floor included for units to be mounted on combustible floors

Side view shown Note: The appliance is shown in a standard test enclosure.

Figure 1 Duct, air temperature, and test point locations for in-line appliances (See Clauses 11.2, 11.3.13, 11.3.14, and 12.2 and Figure 6.)

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July 2007 (Replaces p. 44, September 2004)

Update No. 1 B140.4-04 February 2006 Note: General Instructions for CSA Standards are now called Updates. Please contact CSA Information Products Sales or visit www.ShopCSA.ca for information about the CSA Standards Update Service.

Title: Oil-fired warm air furnaces — originally published September 2004 The following revisions have been formally approved: Revised

Outside front cover and title page

New

National Standards of Canada text

Deleted

None

CSA B140.4-04 originally consisted of 73 pages (x preliminary and 63 text), each dated September 2004. It now consists of the following pages: September 2004 iii–x and 1–63 February 2006

Cover, National Standards of Canada text, title page, and copyright page

• Update your copy by inserting these revised pages. • Keep the pages you remove for reference.

CAN/CSA-B140.4-04 A National Standard of Canada (approved February 2006)

Oil-fired warm air furnaces

Legal Notice for Standards Canadian Standards Association (CSA) standards are developed through a consensus standards development process approved by the Standards Council of Canada. This process brings together volunteers representing varied viewpoints and interests to achieve consensus and develop a standard. Although CSA administers the process and establishes rules to promote fairness in achieving consensus, it does not independently test, evaluate, or verify the content of standards.

Disclaimer and exclusion of liability This document is provided without any representations, warranties, or conditions of any kind, express or implied, including, without limitation, implied warranties or conditions concerning this document’s fitness for a particular purpose or use, its merchantability, or its non-infringement of any third party’s intellectual property rights. CSA does not warrant the accuracy, completeness, or currency of any of the information published in this document. CSA makes no representations or warranties regarding this document’s compliance with any applicable statute, rule, or regulation. IN NO EVENT SHALL CSA, ITS VOLUNTEERS, MEMBERS, SUBSIDIARIES, OR AFFILIATED COMPANIES, OR THEIR EMPLOYEES, DIRECTORS, OR OFFICERS, BE LIABLE FOR ANY DIRECT, INDIRECT, OR INCIDENTAL DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES, HOWSOEVER CAUSED, INCLUDING BUT NOT LIMITED TO SPECIAL OR CONSEQUENTIAL DAMAGES, LOST REVENUE, BUSINESS INTERRUPTION, LOST OR DAMAGED DATA, OR ANY OTHER COMMERCIAL OR ECONOMIC LOSS, WHETHER BASED IN CONTRACT, TORT (INCLUDING NEGLIGENCE), OR ANY OTHER THEORY OF LIABILITY, ARISING OUT OF OR RESULTING FROM ACCESS TO OR POSSESSION OR USE OF THIS DOCUMENT, EVEN IF CSA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES. In publishing and making this document available, CSA is not undertaking to render professional or other services for or on behalf of any person or entity or to perform any duty owed by any person or entity to another person or entity. The information in this document is directed to those who have the appropriate degree of experience to use and apply its contents, and CSA accepts no responsibility whatsoever arising in any way from any and all use of or reliance on the information contained in this document. CSA is a private not-for-profit company that publishes voluntary standards and related documents. CSA has no power, nor does it undertake, to enforce compliance with the contents of the standards or other documents it publishes.

Intellectual property rights and ownership As between CSA and the users of this document (whether it be in printed or electronic form), CSA is the owner of all works contained herein that are protected by copyright, all trade-marks (except as otherwise noted to the contrary), and all inventions and trade secrets that may be contained in this document, whether or not such inventions and trade secrets are protected by patents and applications for patents. The unauthorized use, modification, copying, or disclosure of this document may violate laws that protect CSA’s intellectual property and may give rise to a right in CSA to seek legal redress for such use, modification, copying, or disclosure. CSA reserves all intellectual property rights in this document.

Authorized use of this document This document is being provided by CSA for informational and non-commercial use only. The user of this document is authorized to do only the following: If this document is in electronic form: load this document onto a computer for the sole purpose of reviewing it; search and browse this document; and print this document.

. . .

Limited copies of this document in print or paper form may be distributed only to persons who are authorized by CSA to have such copies, and only if this Legal Notice appears on each such copy. In addition, users may not and may not permit others to alter this document in any way or remove this Legal Notice from the attached standard; sell this document without authorization from CSA; or make an electronic copy of this document.

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Cette Norme nationale du Canada est offerte en anglais et en français. Although the intended primary application of this Standard is stated in its Scope, it is important to note that it remains the responsibility of the users to judge its suitability for their particular purpose. ®Registered trade-mark of Canadian Standards Association (National Standards of Canada text inserted February 2006)

National Standard of Canada (approved February 2006)

CAN/CSA-B140.4-04 Oil-fired warm air furnaces

Prepared by

Approved by Standards Council of Canada

Published in September 2004 by Canadian Standards Association A not-for-profit private sector organization 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6 1-800-463-6727 • 416-747-4044

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ISBN 1-55397-515-4 Technical Editor: Senka Krsikapa © Canadian Standards Association — 2004 All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. (Copyright page replaced February 2006)

Standards Update Service B140.4-04 September 2004 Title: Oil-fired warm air furnaces Pagination: 73 pages (x preliminary and 63 text), each dated September 2004 To register for e-mail notification about any updates to this publication •

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CSA Standard

B140.4-04 Oil-fired warm air furnaces

Published in September 2004 by Canadian Standards Association A not-for-profit private sector organization 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6 1-800-463-6727 • 416-747-4044

Visit our Online Store at www.ShopCSA.ca

ISBN 1-55397-515-4 Technical Editor: Senka Krsikapa © Canadian Standards Association — 2004 All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher.

© Canadian Standards Association

Oil-fired warm air furnaces

Contents Technical Committee on Oil-Burning Appliance Standards vi Subcommittee on Oil-Fired Warm Air Furnaces viii Preface ix Foreword x 1 Scope 1 2 Reference publications and definitions 2 2.1 Reference publications 2 2.2 Definitions 2 3 General requirements 2 3.1 General 2 3.2 Oil burner 3 3.3 Electrical features 3 3.4 Methods of assembly and shipment 3 4 Construction 4 4.1 General 4 4.2 Combustion products 4 4.3 Accessibility of parts 4 4.4 Location of fuel lines and fuel components 5 4.5 Casings (jackets) and liners 5 4.6 Air-circulating blowers 6 4.7 Air filters 6 4.8 Lubrication 7 4.9 Openings into combustion chamber and flue passages 7 4.10 Flue gas passages 7 4.11 Vent (flue) collars 7 4.12 Draft regulators 8 4.13 Primary and secondary heating surfaces 8 4.14 Pressure-relief openings 9 4.15 Observation of the flame zone 9 4.16 Combustion chambers 9 4.16.1 Refractory material 9 4.16.2 Metal combustion chambers 10 4.16.3 Simulated life test 10 4.16.4 Simulated endurance test 10 4.17 Flue baffles and flame baffles 10 4.18 Insulating materials 10 4.19 Temperature limit controls 11 4.20 Horizontal furnaces and unit heaters 11 5 Marking 12 5.1 General 12 5.2 Installation clearances 13 5.3 Field-mounted burners 13 5.4 Blower motors 14

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5.5

© Canadian Standards Association

Bases for downflow furnaces 14

6 Instructions 14 6.1 General 14 6.2 Installation and service manual 15 6.3 Operating instructions and homeowner instructions 16 6.4 Additional homeowner instructions 16 7 Normal tests 17 7.1 General 17 7.2 Combustion 18 7.2.1 Test requirements 18 7.2.2 Test procedures 18 7.3 Rated output capacity 19 7.3.1 Test requirements 19 7.3.2 Test procedures 20 7.3.3 Determination of rated output capacity 21 7.4 Temperature limit control performance 22 7.4.1 Test requirements 22 7.4.2 Test procedures 22 7.5 Continuity of operation 24 7.5.1 Test requirements 24 7.5.2 Test procedures 24 7.6 Operating temperatures 24 7.6.1 Test requirements 24 7.6.2 Test enclosures 25 7.6.3 Installation methods 28 7.6.4 Test procedures 29 7.7 Motor rating — Air-circulating blowers and fans 29 7.7.1 Test requirements 29 7.7.2 Test procedures 30 7.8 Seepage 30 7.9 Flooding 30 7.10 High static pressures 31 7.10.1 Test requirements 31 7.10.2 Test procedure 31 8 Abnormal tests 31 8.1 General 31 8.2 Abnormal operation temperatures 32 8.3 Abnormal vent outlet pressures 33 9 Burner tests 34 9.1 Vaporizing-type burners 34 9.2 Atomizing-type burners 34 10 Oil-fired heating/cooling appliances primarily for outdoor installation 34 10.1 General 34 10.2 Construction requirements 34 10.2.1 General 34 10.2.2 Assembly 34 10.2.3 Accessibility 35 10.2.4 Combustion air and ventilation 35 10.2.5 Main flame observation 36

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10.2.6 10.3 10.4 10.4.1 10.4.2 10.5 10.5.1 10.5.2 10.5.3 10.5.4

Oil-fired warm air furnaces

Appliance openings 36 Electrical equipment and wiring 36 Marking 36 Rating plate 36 Additional marking 36 Performance requirements 37 Surface temperatures 37 Optional reduced clearances 37 Simulated rain test 37 Simulated wind test 38

11 Plenums, test ducts, and air temperature measurement for forced-air furnaces 39 11.1 General 39 11.2 Reference figures 39 11.3 Details of design and application 39 12 Test enclosures and installation methods for temperature tests 41 12.1 General 41 12.2 Reference figures 41 12.3 Details of design and application 41 Annexes A (informative) — Marking translations 61 Tables 1 — Thickness of plain carbon steel for heat exchangers 43 2 — Minimum permissible vent outlet pressure 43 3 — External static pressures for the rated output capacity test 43 4 — External static pressure for the blower motor rating test 43 Figures 1 — 2 — 3 — 4 — 5(a) — 5(b) — 5(c) — 6 — 7 — 8 — 9 — 10 — 11 — 12 — 13 — 14 15

Duct, air temperature, and test point locations for in-line appliances 44 Duct, air temperature, and test point locations for upflow appliances 45 Test duct design features 46 Cross-section of duct showing outlet-air thermocouple placement 48 Thermocouple for room air-temperature measurement 49 Design of a suitable shield for air-temperature measurement 49 Location of thermocouple on a bulb-type sensing element 50 Standard enclosure for floor-mounted appliances 51 Alcove-type enclosure for floor-mounted appliances 52 Closet-type enclosure for floor-mounted appliances 53 Floor-mounted unit in closet-type enclosure 54 Downflow furnace in closet-type enclosure 55 Standard enclosure for horizontal furnaces 56 Closet-type enclosure for horizontal furnaces 57 Duct and thermocouple locations for horizontal furnaces and typical placement of such appliances in standard enclosures 58 — Sealing of an annulus around a vent pipe 59 — Standard enclosure for unit heaters 60

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Technical Committee on Oil-Burning Appliance Standards M.F.C. Brooker

Bradford White Canada Inc., Mississauga, Ontario

Chair

J. Godfree

Jeremy Godfree Product Design, Pugwash, Nova Scotia

Vice-Chair

C. Baumgartner

Office of Energy Efficiency, Ottawa, Ontario

T. Begoske

Field Controls, Brighton, Michigan, USA

K. Blair

ERC International Ltd., Utica, New York, USA

B. Blouin

Dettson Industries Inc., Sherbrooke, Québec

H. Bouchard

Corporation des maîtres mécaniciens en tuyauterie du Québec, Montréal, Québec

M. Bouchard

Riello Burners North America, Orford, Québec

R.L.D. Cane

Caneta Research, Mississauga, Ontario

Associate

M. Evans

Underwriters’ Laboratories of Canada, Scarborough, Ontario

Associate

R. Greiss

Department of National Defence, Ottawa, Ontario

E. Grzesik

Ontario Ministry of Energy, Energy Efficiency and Renewables, Toronto, Ontario

A.C.S. Hayden

Advanced Combustion Technologies, Ottawa, Ontario

A. Herzon

Nordyne Inc., O’Fallon, Missouri, USA

K. Johnson

Newmac Manufacturing Inc., Debert, Nova Scotia

E. Mason

Consumer Representative, Halifax, Nova Scotia

vi

Associate

Associate

Associate

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© Canadian Standards Association

I.W. Mault

Manitoba Department of Labour, Winnipeg, Manitoba

R. McCullough

Saskatchewan Corrections and Public Safety, Regina, Saskatchewan

P.G. McKay

Brampton, Ontario

W.G. Mitchell

Human Resources Development Canada, Ottawa, Ontario

R. Mossavi

Viessmann Manufacturing Company Inc., Waterloo, Ontario

P. Rizcallah

National Research Council Canada, Ottawa, Ontario

D. Stewart

Nova Scotia Department of Environment and Labour, Halifax, Nova Scotia

R. Sumabat

Technical Standards & Safety Authority, Toronto, Ontario

H. West

H.R. West Holdings, Brampton, Ontario

S. Krsikapa

CSA, Mississauga, Ontario

September 2004

Oil-fired warm air furnaces

Associate

Project Manager

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Subcommittee on Oil-Fired Warm Air Furnaces M.F.C. Brooker

Bradford White Canada Inc., Mississauga, Ontario

K. Blair

ERC International Ltd., Utica, New York, USA

B. Blouin

Dettson Industries Inc., Sherbrooke, Québec

J. Godfree

Jeremy Godfree Product Design, Pugwash, Nova Scotia

E. Grzesik

Ontario Ministry of Energy, Energy Efficiency and Renewables, Toronto, Ontario

K. Johnson

Newmac Manufacturing Inc., Debert, Nova Scotia

H. West

H.R. West Holdings, Brampton, Ontario

S. Krsikapa

CSA, Mississauga, Ontario

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Chair

Project Manager

September 2004

© Canadian Standards Association

Oil-fired warm air furnaces

Preface This is the third edition of CSA B140.4, Oil-fired warm air furnaces. It supersedes the previous editions published in 1974 and 1971. It is one of a series of oil-burning equipment Standards covering minimum requirements for the safe operation, acceptable performance, design, construction, manufacture, marking, and testing of oil-burning equipment and should be read in conjunction with CSA B140.0, Oil-Burning Equipment: General Requirements. Changes in this new edition include the following: (a) The referenced Standards have been updated. (b) The Scope of the Standard has been clarified. (c) References to external “flues” and “flue pipes” have been changed to “vents” and “vent pipes”. (d) Filter specifications have been updated. (e) Requirements for installation, the service manual, and operating instructions and some markings have been modified and now indicate homeowner instructions. (f) Maximum vent outlet temperature requirements have been updated. (g) Test enclosure floor construction has been modified. (h) Simulated rain and wind tests for outdoor appliances have been amended. (i) All numeric values have been converted to SI (metric) units, with Imperial units or US Customary measurements shown for information only. This Standard was prepared by the Subcommittee on Oil-Fired Warm Air Furnaces, under the jurisdiction of the Technical Committee on Oil-Burning Appliance Standards and the Strategic Steering Committee on Fire Safety and Fuel Burning Equipment, and has been formally approved by the Technical Committee. This Standard will be submitted to the Standards Council of Canada for approval as a National Standard of Canada. September 2004 Notes: (1) Use of the singular does not exclude the plural (and vice versa) when the sense allows. (2) Although the intended primary application of this Standard is stated in its Scope, it is important to note that it remains the responsibility of the users of the Standard to judge its suitability for their particular purpose. (3) This publication was developed by consensus, which is defined by CSA Policy governing standardization — Code of good practice for standardization as “substantial agreement. Consensus implies much more than a simple majority, but not necessarily unanimity”. It is consistent with this definition that a member may be included in the Technical Committee list and yet not be in full agreement with all clauses of this publication. (4) CSA Standards are subject to periodic review, and suggestions for their improvement will be referred to the appropriate committee. (5) All enquiries regarding this Standard, including requests for interpretation, should be addressed to Canadian Standards Association, 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6. Requests for interpretation should (a) define the problem, making reference to the specific clause, and, where appropriate, include an illustrative sketch; (b) provide an explanation of circumstances surrounding the actual field condition; and (c) be phrased where possible to permit a specific “yes” or “no” answer. Committee interpretations are processed in accordance with the CSA Directives and guidelines governing standardization and are published in CSA’s periodical Info Update, which is available on the CSA Web site at www.csa.ca.

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Foreword The Canadian Standards Association (CSA) develops standards under the name Canadian Standards Association, and provides certification and testing under the name CSA International. CSA International provides certification services for manufacturers who, under license from CSA, wish to use the appropriate registered CSA Marks on certain products of their manufacture to indicate conformity with CSA Standards. CSA Certification for a number of products is provided in the interest of maintaining agreed-upon standards of quality, performance, interchangeability and/or safety, as appropriate. Where applicable, certification may form the basis for acceptance by inspection authorities responsible for enforcement of regulations. Where feasible, programs will be developed for additional products for which certification is desired by producers, consumers, or other interests. In performing its functions in accordance with its objectives, CSA does not assume or undertake to discharge any responsibility of the manufacturer or any other party. The opinions and findings of the Association represent its professional judgement given with due consideration to the necessary limitations of practical operation and state of the art at the time the Standard is processed. Products in substantial accord with this Standard but which exhibit a minor difference or a new feature may be deemed to meet the Standard providing the feature or difference is found acceptable utilizing appropriate CSA International Operating Procedures. Products that comply with this Standard shall not be certified if they are found to have additional features which are inconsistent with the intent of this Standard. Products shall not be certifiable if they are discovered to contravene applicable laws or regulations. Testing techniques, test procedures, and instrumentation frequently must be prescribed by CSA International in addition to the technical requirements contained in Standards of CSA. In addition to markings specified in the Standard, CSA International may require special cautions, markings, and instructions that are not specified by the Standard. Some tests required by CSA Standards may be inherently hazardous. The Association neither assumes nor accepts any responsibility for any injury or damage that may occur during or as the result of tests, wherever performed, whether performed in whole or in part by the manufacturer or the Association, and whether or not any equipment, facility, or personnel for or in connection with the test is furnished by the manufacturer or the Association. Manufacturers should note that, in the event of the failure of CSA International to resolve an issue arising from the interpretation of requirements, there is an appeal procedure: the complainant should submit the matter, in writing, to the Secretary of the Canadian Standards Association. If this Standard is to be used in obtaining CSA Certification please remember, when making application for certification, to request all current Amendments, Bulletins, Notices, and Technical Information Letters that may be applicable and for which there may be a nominal charge. For such information or for further information concerning CSA Certification, please address your inquiry to Applications and Customer Service, CSA International, 178 Rexdale Boulevard, Toronto, Ontario, Canada M9W 1R3.

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Oil-fired warm air furnaces

B140.4-04 Oil-fired warm air furnaces 1 Scope 1.1 This Standard applies to complete, vent- (flue-) connected, oil-fired warm air appliances, irrespective of the heating capacity or the type of burner used.

1.2 This Standard applies to appliances (a) intended for installation with the base of the appliance placed on the floor; (b) intended to be used with pipes or ducts for the distribution of the heated air; and (c) employing forced circulation of the heated air.

1.3 This Standard also applies to (a) downflow furnaces; (b) duct furnaces; (c) horizontal furnaces; (d) in-line furnaces; (e) unit heaters; and (f) upflow furnaces.

1.4 Requirements for heating/cooling appliances primarily for outdoor installation are specified in Clause 10.

1.5 This Standard is written in SI (metric) units. The values given in parentheses are for information only.

1.6 In CSA Standards, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the standard, and “can” is used to express possibility or capability. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Legends to equations and figures are considered requirements. Annexes are designated normative (mandatory) or informative (nonmandatory) to define their application

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2 Reference publications and definitions 2.1 Reference publications This Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below. CSA (Canadian Standards Association) ANSI Z21.47-2003/CSA 2.3-2003 Gas-Fired Central Furnaces B139-04 Installation code for oil-burning equipment B140.0-03 Oil-Burning Equipment: General Requirements B140.1-1966 (R2001) Vapourizing-Type Oil Burners CAN/CSA-B140.2.1-M90 (R2000) Oil Burners; Atomizing-Type C22.1-02 Canadian Electrical Code, Part I C22.2 No. 3-M1988 (R1999) Electrical Features of Fuel-Burning Equipment ASTM (American Society for Testing and Materials) E 84-04 Standard Test Method for Surface Burning Characteristics of Building Materials

2.2 Definitions The definitions contained in CSA B139 apply in this Standard. The following definition also applies: Flue — an enclosed passageway for conveying gases within an appliance (heat exchanger).

3 General requirements 3.1 General 3.1.1 The equipment shall meet the general provisions of CSA B140.0.

3.1.2 Each appliance shall be provided with (a) a primary safety control that will prevent an unsafe condition resulting from ignition or flame failure; and (b) the necessary limit controls.

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Oil-fired warm air furnaces

3.2 Oil burner 3.2.1 The oil burner and all associated components shall meet the requirements of CSA B140.1 and CAN/CSA-B140.2.1.

3.2.2 Means shall be provided so that positive position and alignment can be maintained between the burner and the combustion chamber, and the other component parts of the appliance.

3.2.3 When the oil burner is enclosed either separately or within the furnace casing (jacket), provision shall be made for an adequate supply of combustion and ventilating air to the burner, as determined by the tests specified in Clauses 7 and 8.

3.3 Electrical features 3.3.1 The electrical features that are a part of, or are used in conjunction with, the oil-burning equipment covered by this Standard shall meet the applicable requirements of the Canadian Electrical Code, Part II, and in particular, CSA C22.2 No. 3.

3.3.2 Each appliance shall be provided with a terminal or connection box, or the equivalent, suitable for conduit connection to the source of supply. The terminal box shall be located on the appliance such that the supply connection does not need to be disconnected for normal servicing of the appliance.

3.3.3 All wiring, cords, and wiring enclosures used with appliances shall be adequately supported. Note: Wiring, cords, and wiring enclosures that are securely supported at intervals of 300 to 450 mm (12 to 18 in) throughout their free length, and within 100 to 150 mm (4 to 6 in) from terminals or connection points, are normally considered to be adequately supported.

3.4 Methods of assembly and shipment 3.4.1 The methods of assembly and shipment of the equipment shall comply with the applicable requirements of CSA B140.0.

3.4.2 The equipment shall consist of a furnace equipped with an integral or a separate specified vaporizing- or atomizing-type oil burner, and all the necessary safety controls, electrical equipment, enclosures, etc., arranged for factory- or field-assembly as a complete heating appliance. The burner, whether it is integral or a separate specified type, shall meet the requirements of the other applicable Standards in the CSA B140 series of Standards. If the burner is a separate specified type, the furnace and burner shall be designed to accommodate each other, and the furnace shall be provided with a marking indicating the burner with which it is to be equipped (see Clause 5.3.1). Notes: (1) “Integral” refers to a factory-mounted burner, or one that is especially designed for use with the particular furnace and does not lend itself for use with other makes of furnace. (2) “Separate specified” refers to a particular make and model of burner supplied by the furnace manufacturer as a part of the complete furnace, but intended for field mounting.

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3.4.3 Appliances intended for field-assembly or field wiring or both shall comply fully with the applicable requirements specified in Clauses 5 and 6.

3.4.4 Appliances should be factory-assembled and factory-wired before shipment, when practical. Note: It is recommended that the samples provided for laboratory test purposes be factory-assembled and -wired.

4 Construction 4.1 General The materials, quality of work, and construction of the equipment shall comply with the applicable requirements of CSA B140.0.

4.2 Combustion products The construction of the equipment shall not allow the products of combustion to become mixed with the circulating air.

4.3 Accessibility of parts 4.3.1 The arrangement of removable parts in the assembly shall be such that their restoration, following removal for normal servicing, will not necessitate readjustment to secure their proper relationship with other parts of the assembly.

4.3.2 Panels or components that are removed from the heat exchanger to make surfaces accessible for cleaning shall be of such design that they can only be reinstalled in their original position. When threaded fasteners are used, they shall be of dissimilar material to prevent seizing.

4.3.3 Radiators, flue gas passageways, flue baffles, secondary heating surfaces, and primary heating surfaces shall be readily accessible for brush or scraper. Cleaning and soot removal should be done without the necessity for major dismantling of the appliance or the disconnection of wiring circuits. A suitable brush and/or scraper shall be made available for each appliance, together with instructions for their use. At least three-quarters of the surface areas of all parts that require cleaning shall be accessible. The blockage of those parts not accessible for cleaning shall not interfere with the safe operation of the appliance. Notes: (1) Some manufacturers do not ship brushes or scrapers with the furnace because their equipment does not call for a special tool. Off-the-shelf brushes and/or scrapers are suitable and the installer should have these. (2) A vacuum cleaner is not considered to be an adequate cleaning tool but is considered suitable for soot removal following mechanical cleaning, where practical. (3) The disconnecting of fuel line joints to remove a burner is considered acceptable. (4) If electrical components are to be removed during cleaning operations, means are to be provided to enable the removal of the device without the disconnection of electrical circuits and without producing undue strain on electrical connections. (Undue strain is considered to be that strain which causes damage or weakening.) (5) The phrase “major dismantling of the appliance” does not prohibit the removal of the vent connector (vent pipe), the furnace panels, the burner, or those components which are specifically designed to permit ready removal and replacement. (6) Persons should be able to perform the cleaning operation using the instructions provided.

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4.3.4 When the appliance is installed, sufficient and reasonable accessibility shall be afforded to all parts normally requiring service or adjustment (e.g., controls, burners, blowers, filters, draft regulators, etc.).

4.3.5 When the appliance is intended for installation in an alcove, closet, or similar enclosure, all parts normally requiring service or adjustment, as specified in Clause 4.3.4, shall be readily accessible from the front of the enclosure.

4.4 Location of fuel lines and fuel components Fuel piping and fuel-handling components shall be located where they are accessible and shall not be located within circulating-air channels.

4.5 Casings (jackets) and liners 4.5.1 The outer casing shall be made of steel or of other suitable material, reinforced if necessary, so that it is not likely to be damaged from handling and shipment, installation, and use. Sheet steel casings shall be not less than No. 22 gauge in thickness, except where adequate reinforcement is provided for a surface. All surfaces shall be protected against corrosion as far as practicable. The finish shall be protected adequately against damage by heat.

4.5.2 Casing (jacket) liners and heat baffles shall be attached in a secure manner to ensure proper spacing, and shall not be adversely affected by corrosion, or by heat from the appliance.

4.5.3 The casing (jacket) of an appliance intended for installation on a combustible floor or platform shall have a completely closed bottom under the primary heat exchanger compartment except for upflow or downflow type furnaces.

4.5.4 When the appliance base supports the weight of the appliance, the base shall be constructed to provide adequate support for the appliance and shall be protected against corrosion.

4.5.5 The base (which may be separable from the furnace) of a downflow furnace intended for installation on combustible flooring shall be designed to establish and maintain not less than the required clearance, as determined during the test specified in Clause 7.6, between vertical surfaces of the plenum or duct to be attached to the furnace and the floor construction.

4.5.6 When a vestibule door has openings for ventilation or combustion air, it shall be constructed in such a manner that it can only be installed correctly in its location and an interchange with any other panel on the appliance is impossible.

4.5.7 When the appliance casing (jacket) has a base panel located beneath the oil burner, the construction shall minimize the possibility of fuel oil accumulating beneath the heat exchanger as a result of fuel oil leakage within the burner compartment.

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4.6 Air-circulating blowers 4.6.1 The air-circulating blower in a forced-air furnace shall deliver sufficient air so that the air temperature rise shall not exceed 47 °C (85°F) when the appliance is operated under the conditions specified in Clause 7.3.

4.6.2 The means provided for adjusting the speed or air delivery of any air-circulating blower shall be such that it cannot accidentally slip or be knocked out of adjustment.

4.7 Air filters 4.7.1 Air filters supplied with these appliances shall be certified.

4.7.2 Air filters shall be of such size that the average air velocity through any filter shall not exceed the filter manufacturer’s recommended air velocity. The filter areas and the air velocity shall be determined as specified in Clauses 4.7.4 and 4.7.5.

4.7.3 Filter areas shall be based on nominal dimensions taken to the increment of 25 mm (next larger integral inch). Note: For nominal dimensions, use the dimensions specified by the filter manufacturer, where applicable.

4.7.4 Air velocity shall be based on the rated air temperature rise ± 3 °C (± 5°F) at maximum rated output capacity (see Clause 7.3.2). If the appliance is rated for use in conjunction with air conditioning equipment, the air velocity shall be based on the maximum air conditioning capacity. See the note to Clause 4.7.5. Note: The air velocity may be determined from the greater of the airflow rate associated with the maximum rated output capacity of Clause 7.3 and 0.66 m3/s per kW (400 cfm per ton) of air conditioning capacity.

4.7.5 In the absence of filter design data, the average air velocity through the filter shall not exceed 91.4 m/min (300 fpm). Note: When an appliance is rated for air conditioning, it often blows more cubic metres per minute (cubic feet per minute) through the filter than is specified in either Clause 4.7.4 or 4.7.5.

4.7.6 As protection against overheating, there shall be a minimum clearance of 50 mm (2 in) between the motor of an air-circulating blower and the face of an air filter exposed to the motor, with the air filter in the intended position above the motor, and with the motor adjusted to its minimum clearance from the filter face. Alternatively, the equivalent protection may be afforded by suitable baffles or by a motor having an enclosed frame.

4.7.7 Adequate support shall be provided to maintain the air filters in their intended position.

4.7.8 It shall be possible to insert or remove air filters from an appliance with no distortion of the filter.

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4.8 Lubrication 4.8.1 Reasonable means shall be provided for lubricating motor and blower bearings, where necessary.

4.8.2 Instructions for the lubrication of motor and blower bearings should be permanently affixed to or imprinted upon the blower housing, or on readily visible adjacent surfaces. The instructions shall designate the proper type and grade of lubricants to be used. Note: The above instructions may also be included in the operating instructions.

4.9 Openings into combustion chamber and flue passages 4.9.1 Extensions from flame observation and burner openings shall extend to or through the casing (jacket).

4.9.2 Covers on cleanout openings may be located within the casing (jacket) on the pressure side of the circulating-air fan behind suitable access openings.

4.9.3 Cleanout openings shall be provided with gaskets of adequate durability to withstand normal use.

4.10 Flue gas passages 4.10.1 When the proper operation of the appliance relies on natural chimney draft, the total cross-sectional areas of the flue gas passages shall be not less than the equivalent area of the minimum chimney vent diameter identified in Clause 4.2.2.4 of CSA B139.

4.10.2 Joints other than those continuously welded shall not be permitted in the air-circulating passages subject to negative static pressures.

4.11 Vent (flue) collars 4.11.1 Each appliance shall be provided with a securely mounted metal vent (flue) collar that is at least the same gauge as the minimum gauge required for the heating surface to which it is attached and is suitable for attaching a vent connector (flue pipe). The vent collar shall extend through the casing (jacket) a sufficient distance to permit secure and gas-tight attachment of the vent connector. Annular stops, collars, or equivalent means shall be provided to prevent penetration of the vent connector into the negative pressure zone.

4.11.2 The diameter of the vent collar shall be not less than the minimum chimney flue diameter identified in Clause 4.2.2.4 of CSA B139, where the proper operation of the appliance relies on natural chimney draft. Where an oval connection is used, the resulting flow area shall be not less than 80% of that of the equivalent flue.

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4.11.3 Vent collars having a cross-sectional area less than that specified in Clause 4.11.2 shall be subject to a special test investigation, to be conducted in conjunction with the test specified in Clause 7.2, involving a determination of the pressure rise in the combustion chamber during ignition and draft loss through the appliance during operation.

4.11.4 When a manufacturer specifies a vent connector (flue pipe) size differing from the outlet of the appliance, a suitable adapter shall be supplied as part of the appliance and the appliance shall be suitably marked as to the vent collar size.

4.11.5 The thickness of the material used for the adapter shall comply with Table 1.

4.12 Draft regulators 4.12.1 A draft regulator shall be provided with the appliance, unless the requirements of Clause 7 are met under the abnormal test conditions of Clause 8.

4.12.2 Draft regulators, when used, shall comply with the requirements of CSA B140.0.

4.13 Primary and secondary heating surfaces 4.13.1 Primary and secondary heating surfaces, and other surfaces exposed to the direct heat of the flame or to the products of combustion, shall be constructed of sheet steel, cast iron, or other suitable materials.

4.13.2 The design and fabrication of the primary and secondary heat exchangers shall be such as to ensure strength and rigidity.

4.13.3 The minimum thickness of the primary and secondary heat exchangers constructed of plain carbon steel shall be not less than indicated in Table 1, except as noted in Clauses 4.13.4 and 4.13.5.

4.13.4 Appliances with a plain carbon steel heat exchanger of lesser gauge than outlined in Table 1 shall be the subject of special investigation.

4.13.5 Appliances having a rated output capacity in excess of 117 kW (400 000 Btu/h) shall be the subject of special investigation.

4.13.6 The minimum acceptable material thickness, with reference to scaling and of steels other than plain carbon sheet steel (e.g., stainless steel, aluminized steel, special alloys, etc.), shall be determined by special investigation.

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4.13.7 The maximum operating temperatures of the materials forming primary and secondary heating surfaces, combustion chambers, hearths, flue and flame baffles, and other equivalent surfaces shall not exceed the applicable material temperature limits prescribed for normal operation in CSA B140.0 when the equipment is operated under the conditions specified in Clause 7.6.

4.13.8 The minimum operating temperature of the heat exchanger shall meet the requirements of Clauses 7.6.1.10 and 7.6.4.4.

4.13.9 The heat exchanger shall meet the requirements specified in Clause 7.8.

4.14 Pressure-relief openings 4.14.1 A suitable pressure-relief door, or the equivalent, if used, shall be self-closing.

4.14.2 The actuation of any relief door shall not result in a hazardous condition.

4.15 Observation of the flame zone 4.15.1 Provision shall be made to permit adequate observation of the flame-zone and the burner fire condition and to permit determination of the overfire pressure.

4.15.2 The observation opening shall be provided with a suitable attached door or cover.

4.16 Combustion chambers 4.16.1 Refractory material 4.16.1.1 Refractory material, when used for combustion chambers, linings, etc., shall be constructed and seasoned to minimize deterioration of the lining material under operating conditions. This is indicated by the refractory material being capable of withstanding the operating conditions encountered when conducting the tests specified in Clauses 7 and 8 without any visible evidence of deterioration or failure.

4.16.1.2 Refractory materials shall be adequately held in place and shall be accessible for service or replacement.

4.16.1.3 The maximum temperature of a refractory material during a test shall be less than the recommended maximum temperature for the refractory type.

4.16.1.4 Refractory materials shall comply with the requirements of CSA B140.0 or be determined by special investigation.

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4.16.2 Metal combustion chambers 4.16.2.1 Metal combustion chambers shall be capable of withstanding the operating conditions encountered when conducting the tests specified in Clauses 7 and 8 of this Standard and in Clause 7.4 of CSA B140.0 without visible evidence of deterioration, failure, or fatigue.

4.16.2.2 Metal combustion chambers shall be fixed securely in position and shall be accessible for service or replacement.

4.16.2.3 Metal combustion chambers shall be designed with due consideration for thermal stresses, expansion, etc.

4.16.3 Simulated life test When the combustion chamber material or design is unproven, the appliance shall be subjected to the simulated life test as specified in CSA B140.0.

4.16.4 Simulated endurance test When an appliance is recommended for installation where continuous operation may be expected, the appliance shall be subjected to the simulated endurance test as specified in CSA B140.0.

4.17 Flue baffles and flame baffles 4.17.1 Flue baffles and flame baffles shall comply with the requirements of Clauses 4.13.1 and 4.13.7.

4.17.2 Flue baffles and flame baffles shall be capable of withstanding the operating conditions encountered when conducting the appliance tests specified in Clauses 7 and 8 without any visible evidence of deterioration or failure.

4.17.3 Flue baffles and flame baffles shall be fixed or hinged securely in position. (See also Clause 4.3.3.)

4.18 Insulating materials 4.18.1 Materials used for insulation, linings, furnace seals, and similar applications shall be suitable for the conditions encountered in service.

4.18.2 Heat insulation, including backing or facing, and similar material that may be subjected to heat, shall have heat- and moisture-resisting properties and shall be of a type that will not support combustion.

4.18.3 Insulating materials shall be adequately supported and maintained in the intended position. The suitability of the support (whether adhesive, clips, or other means) provided for insulating materials shall be determined on the basis of its application and its ability to withstand the operating conditions encountered when conducting the appliance tests specified in Clauses 7 and 8.

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4.18.4 Acoustic or thermal insulating materials in the air-handling systems of an appliance controlling air for distribution to a building shall have a flame spread rating not greater than 25 and a smoke developed rating not greater than 50 as determined in accordance with ASTM E 84.

4.19 Temperature limit controls 4.19.1 An appliance intended for installation with the appropriate standard clearances as specified in CSA B139 shall be provided with a suitable temperature limit control to prevent the outlet-air temperature from exceeding 120 °C (250°F), when the equipment is tested in accordance with Clause 7.4.

4.19.2 An appliance intended for installation with the appropriate standard clearances in CSA B139 or intended for installation in confined spaces with combustible construction in close proximity to the surfaces of the appliance, such as in closets and alcoves, shall be provided with a suitable temperature limit control to prevent the outlet-air temperature from exceeding 93 °C (200°F), when the equipment is tested in accordance with Clause 7.4.

4.19.3 The maximum temperature limits specified in Clauses 4.19.1 and 4.19.2 shall not apply to appliances equipped with, and intended only for installation with, special types of distribution systems (pipes or ducts) for the heated air. The temperature limit control shall be provided as an integral part of such appliances. See also Clause 7.4.1.2.

4.19.4 Temperature limit controls shall be provided as an integral part (i.e., factory-located on the appliance) of horizontal furnaces, unit heaters, and appliances intended for installation in confined spaces. Note: Such a control may not be required to be mounted for shipment, provided that the control, and the location for the control or both, are supplied by the manufacturer as part of the appliance assembly shipped from the factory.

4.19.5 Either a temperature control or the blower control used with a horizontal furnace shall function to prevent abnormal air temperatures when tested in accordance with the requirements of Clause 7.4.1.3.

4.19.6 Baffles designed to affect the operation of a temperature limit control shall be rigid when mounted in the intended position and shall be securely supported to prevent damage or misalignment during shipment, installation, or use.

4.19.7 Temperature limit controls shall comply also with the requirements of CSA B140.0.

4.20 Horizontal furnaces and unit heaters 4.20.1 Horizontal furnaces and unit heaters shall be designed to minimize the possibility of incandescent particles dropping from the equipment.

4.20.2 Horizontal furnaces designed for suspension and unit heaters shall show no signs of buckling, twisting, or other distortion when suspended in accordance with the manufacturer’s instructions.

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4.20.3 Horizontal furnaces designed for floor mounting shall show no signs of buckling, twisting, or other distortion when mounted in accordance with the manufacturer’s instructions.

5 Marking Note: In Canada, there are two official languages, English and French. Annex A lists French translations of the markings specified in this Standard.

5.1 General 5.1.1 All marking shall comply with the applicable requirements of CSA B140.0 and shall be legible for the life of the appliance.

5.1.2 Each appliance shall be plainly marked in a permanent manner with the following details: (a) the manufacturer’s name, trade name, or other information traceable to the manufacturer; Note: Sufficient information should be provided to allow the manufacturer to be traced by the test agency and the authority having jurisdiction.

(b) the model or type number of the complete appliance; (c) the maximum fuel oil input (USgph, L/h, kW, lb/h, kg/h, or other suitable units), nozzle spray angle, and type of spray pattern, when necessary; Notes: (1) For pressure burners, the maximum input should match the rated nozzle capacity multiplied by the number of nozzles. When it does not, rated nozzle size and pump pressure for maximum input should also be given. (2) The maximum input marking of Item (c) does not apply when the input rate is set by the appliance manufacturer and cannot be altered in the field. Inputs specified in gallons per hour are to be qualified by the appropriate measurement, e.g., Canadian (Can) or United States (US).

(d) the rated output capacity in kW (Btu/h); Note: The output capacity rating of Item (d) may be marked at not less than 80% of the actual capacity without additional tests, provided that the gas temperature, carbon dioxide (CO2), and smoke density ratings are within the accepted limits.

(e) (f) (g) (h) (i) (j) (k) (l) (m)

12

the electrical rating, where applicable, as specified in CSA C22.2 No. 3; the heaviest type of fuel oil; the maximum over-fire pressure; an appliance approved without a draft regulator shall be so marked; the burner make and model unless the burner is integral; the normal operating vent outlet pressure range (positive or negative) in Pa (in wc); the external static pressure; the temperature rise recommended by the manufacturer; additional marking for appliances approved for external static pressures other than those shown in Table 3, which require component changes. The static information may form part of the main nameplate, adjacent to the main nameplate or fan door. If adjacent to the fan door, the main nameplate shall state wording to the effect “Refer to the additional marking located on the fan door of the appliance”. If the static marking is a separate label, the appliance model number shall be on the label. The following shall be required for each external static pressure approved: (i) the external static pressure; (ii) the temperature rise; (iii) the outside diameter of the blower and motor pulleys; (iv) the blower model number and the manufacturer’s identity where a change is required; (v) the motor kW (hp) size; (vi) a motor that has been classed as non-interchangeable shall be identified as to the manufacturer and model number, including any alternate motors;

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(vii) when the total appliance ampere load is 12 A or less for the maximum external static pressure approved, it may be shown on the main nameplate. When the total appliance ampere load for the maximum external static pressure approved exceeds 12 A, the ampere rating shall be shown for each external static pressure; (viii) the external static pressure for which an appliance is equipped when it leaves the factory. This shall appear on the main nameplate; and (ix) when the external static pressure ratings are in increments of more than 5 Pa (0.02 in wc), the equivalent of the following on the static rating plate: “When an intermediate external static pressure is required, the components specified for the next larger static pressure shall be used and adjusted for the rated temperature rise”; (n) a permanent marking on the appliance with wording equivalent to the following: REGULAR CLEANING OF THIS APPLIANCE IS REQUIRED. SEE SERVICE MANUAL. The above markings shall be on a non-removable panel on the appliance and shall be readily accessible; (o) on a horizontal furnace that is not approved for zero static pressure, a permanent marking to the effect: DO NOT USE THIS FURNACE WITHOUT DUCTS; (p) the statement or the equivalent words (where applicable): CERTIFIED FOR USE WITH TYPE L VENT; Note: See Clause 7.2.1.4.2.

(q) A unit heater that is not approved for use with ducts shall be permanently marked to the effect: DO NOT USE WITH DUCTS OTHER THAN FITTINGS APPROVED WITH THE UNIT.

5.2 Installation clearances 5.2.1 Each appliance shall bear a marking giving the minimum clearances from the appliance to adjacent combustible construction when installed, and the type of floor. Information concerning the ventilation openings that are necessary to meet the test requirements of Clauses 7 and 8 shall also be specified for equipment intended for closet installation. Note: Refer to CSA B139 for further information concerning clearances, including specifications for standard clearances.

5.2.2 When special clearances are required for access to the appliance for cleaning or servicing operations, such clearance information shall be clearly marked on the appliance. These special clearances may be combined with the clearances as required in Clause 5.2.1.

5.2.3 The installation clearance markings shall be located adjacent to, or combined with, the details required in Clause 5.1.2. Note: The above marking may be on a paper label, water transfer, or the equivalent.

5.3 Field-mounted burners 5.3.1 With the exception of those appliances with an integral burner, when a furnace and a burner are shipped as separate items from one or more locations, the following marking or its equivalent shall appear on the appliance in a place where the details may be readily seen: (a) FOR USE ONLY WITH (specify manufacturer or type identification of burner); and (b) OIL BURNER MODEL (specify model or type number of specific type of burner). Note: For further information concerning “type identification” and “specific type” of burner, refer to CSA B140.0.

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5.3.2 The markings specified in Clause 5.3.1 shall be located adjacent to, or combined with, the details required in Clause 5.1.2. Note: The marking may be on a paper label, water transfer, or the equivalent.

5.4 Blower motors 5.4.1 When a blower motor is not shipped with the furnace or when a special design of blower motor is required, the following marking or its equivalent shall appear on the appliance in a place where the details may be readily seen: (a) FOR USE ONLY WITH (specify manufacturer or type of blower motor); (b) BLOWER MOTOR MODEL (specify model or type number of blower); (c) FRAME (specify frame type or classification of blower motor); and (d) RATED AT (specify horsepower or ampere rating of blower motor). Note: The applicable information is to be included in each case. All or a part of the above information may be required.

5.4.2 The marking specified in Clause 5.4.1 shall be located adjacent to, or combined with, the detailed markings required in Clause 5.1 or 5.3, or both. Note: The above marking may be on a paper label, water transfer, or the equivalent.

5.5 Bases for downflow furnaces 5.5.1 Downflow furnaces that require a separate base for installation on combustible floors shall be marked with the identity of the base.

5.5.2 The separate base shall be so marked that it may be identified after the installation and after operation of the furnace.

6 Instructions 6.1 General 6.1.1 The instructions shall comply with the applicable requirements of CSA B140.0.

6.1.2 The manufacturer shall provide with each appliance an installation, service, and operating manual that contains a section providing instructions to the homeowner. All documents shall bear a date of publication. Note: The service manual and the installation instructions may be in two separate parts. Similarly, the instructions for the burner and for the appliance may also be in separate parts. If the data in the instructions supplied with the burner differ from those in the appliance instructions, this should be clearly stated in the appliance instructions.

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6.2 Installation and service manual The Installation and Service Manual shall include the following information when applicable: (a) a wording equivalent to the following: THE INSTALLATION OF THE APPLIANCE SHALL BE IN ACCORDANCE WITH THE REGULATIONS OF THE AUTHORITIES HAVING JURISDICTION; Note: Reference should be made to CSA B139 for recommended installation practice in Canada.

(b) the manufacturer’s name or equivalent identification; Note: Sufficient information should be provided that the manufacturer can be traced by the test agency and the authority having jurisdiction.

(c) the model or type designation of the equipment covered by the manual; (d) adequate information for the complete installation of the appliance, including (i) information for properly installing the various components and sub-assemblies of the appliances, where such components are not factory-assembled; (ii) suitable erection instructions for field-assembled equipment; and (iii) a complete list of all sub-assemblies or components packed separately; Note: It is recommended that explanatory drawings or an illustrative description of step-by-step methods for assembling the equipment be employed.

(e) adequate information relative to the placement of the appliance and vent connector (flue pipe), including the recommended minimum clearances to combustible material and the type of floor permissible, e.g., combustible or non-combustible; (f) information relative to the installation, wiring, adjustment, and operation of electrical controls (e.g., combustion-safety controls, limit controls, etc.); Note: Such information should preferably be given on drawings, where possible.

(g) a complete wiring diagram of the equipment; (h) information regarding the installation of the fuel oil supply tank, and the fuel line to be connected to the burner; Note: This section should be supplemented with illustrations of typical installations.

(i)

(j) (k) (l) (m)

(n) (o)

(p) (q) (r)

adequate information for setting the chimney draft, including (i) a caution equivalent to the following: OIL-FIRED APPLIANCES SHALL BE CONNECTED TO VENTS HAVING SUFFICIENT DRAFT AT ALL TIMES TO ENSURE SAFE AND PROPER OPERATION OF THE APPLIANCE; (ii) the recommended chimney draft in suitable units, i.e., kPa (in wc); (iii) adequate information pertaining to chimneys, i.e., size, elevation, condition; (iv) instructions for the installation and adjustment of the draft regulator, when supplied; and (v) recommendations for cleaning or replacing vent connectors (flue pipes); the oil burner input capacity, in L/h, cm3/min, kg/h (USgph or lb/h); for appliances incorporating atomizing burners equipped with interchangeable atomizing nozzles, the recommended spray angle and the spray pattern; the grades of fuel oil for the burner; information relative to the installation of refractory combustion chambers (fireboxes), when furnished separately, including (i) the actual dimensions of the combustion chamber for each size appliance; and (ii) for wall flame burners, details for locating the hearth, hearth segments, grilles, and the ignition means; instructions for locating, levelling, and fastening the burner, when not installed by the manufacturer; for appliances incorporating atomizing burners, the dimensional relationship of the electrode tips with one another, and with adjacent fixed and adjustable components, for each recommended capacity and spray angle and the insulator creepage distance; for appliances incorporating vaporizing burners, the elevation from the base of the burning unit to the maximum operating fuel level in the fuel level regulating device; for appliances incorporating wall-flame burners, the recommendations concerning the placement of field-installed constant level valves; the procedure to be followed in adjusting the supply of air and fuel for proper combustion (e.g., flame appearance or CO2 readings);

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information relative to air requirements into the appliance room for satisfactory combustion and ventilation; Note: For recommended practice, refer to CSA B139.

(t) information relative to the testing and the subsequent maintenance and service of the equipment; (u) suitable information relative to the recommended cleaning procedure for the appliance, including any precautions on the cleaning of the combustion chamber and any special instructions regarding the use of cleaning tools; and (v) the recommended minimum return air temperature.

6.3 Operating instructions and homeowner instructions Both operating instructions and homeowner instructions shall include the following information where applicable: (a) wording in the forepart equivalent to the following: SAVE THESE INSTRUCTIONS FOR REFERENCE; (b) the manufacturer’s name or other acceptable identification; (c) the model or type designation of the equipment covered by the instructions; (d) the grades of fuel oil, followed by the caution, in block letters: DO NOT USE GASOLINE, CRANKCASE OIL, OR ANY OIL CONTAINING GASOLINE; (e) information relative to the adjustment of the air and oil for proper flame where such is left to the discretion of the owner or operator; (f) where applicable, instructions for shutting down the burner and the furnace, and a caution equivalent to the following: ALWAYS KEEP THE OIL SUPPLY VALVE SHUT OFF IF THE BURNER IS SHUT DOWN FOR AN EXTENDED PERIOD OF TIME; (g) the general maintenance and care to be given the burner and the furnace when in operation; (h) the care of the appliance when closed down for the summer, and the general manner of restarting and reconditioning the heating system in the fall; (i) a caution equivalent to the following: DO NOT START THE BURNER UNLESS THE BLOWER ACCESS DOOR IS SECURED IN PLACE; (j) a description of the procedure to be followed in cleaning the oil filter or strainer, where this operation may be left to the discretion of the owner or operator; (k) a description of the procedure for replacing the air filters, where applicable, and the type of filters to be used; (l) instructions regarding the cleaning of the appliance; (m) a caution, in block letters, equivalent to the following: NEVER BURN GARBAGE OR PAPER IN THE HEATING SYSTEM, AND NEVER LEAVE PAPER OR RAGS AROUND THE APPLIANCE; and (n) an identified space for contact information for service personnel. Note: The operating instructions and the homeowner instructions may be sections in the Installation and Service Operating Manual or may be separate documents.

6.4 Additional homeowner instructions In addition to the information listed in Clause 6.3, the instructions intended for the homeowner shall provide, where applicable, the following: (a) instruction on the importance of knowing the location and the operation of the emergency power isolation switch; (b) instruction on the importance of keeping clear space around the appliance, i.e., not stacking items or boxing in the appliance within the required clearances to combustibles; (c) instruction on the importance of ensuring that the supply of combustion air to the appliance is not obstructed or cut off; (d) instruction on the importance of maintaining the proper ventilation of the appliance area; (e) instruction on the importance of maintaining a free flow of air through the return air register(s); (f) instruction on the importance of contacting service personnel before remodelling, for annual servicing and maintenance (including air filter replacement), and before and after extended periods of appliance inoperation; (g) the general manner of starting the burner, and of restarting after ignition failure, when this operation may be performed without the help of a service person. This section shall include a caution equivalent

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to the following: DO NOT ATTEMPT TO START THE BURNER WHEN EXCESS OIL HAS ACCUMULATED, WHEN THE FURNACE IS FULL OF VAPOUR, OR WHEN THE COMBUSTION CHAMBER IS VERY HOT; and (h) a caution, in block letters, equivalent to the following: DO NOT TAMPER WITH THE APPLIANCE OR CONTROLS — CALL YOUR SERVICE PERSONNEL.

7 Normal tests 7.1 General 7.1.1 The performance of the appliance, under normal conditions of ignition and operation, shall be safe and reliable when the appliance is fired at its rated inputs with the recommended fuel oil grade, and when delivering the rated heat outputs at the plenum (bonnet). Excessive carbonization or smoke, excessively high or low temperatures, oxidation, warpage, or other phenomena that would lead to unsafe performance shall not occur. Equipment intended for high-fire or pilot-fire operation shall be operated at both input values.

7.1.2 If defects become evident, tests additional to those in Clause 7 shall be performed to determine whether such defects would result in unsafe conditions in normal operation. Note: Such additional tests may consist of extensive on–off cycles of operation for the equipment.

7.1.3 The sequence of the tests shall follow the order specified in Clause 7, with the normal tests in Clause 7 preceding the abnormal tests specified in Clause 8. Notes: (1) The sequence of the tests that follow in Clauses 7 and 8 has been adopted to provide a suitable testing procedure. (2) The various test requirements in Clauses 7 and 8 are in many instances interdependent, and the acceptance of an appliance is to be based upon its ability to meet all of the applicable requirements specified. For example, the vent gas temperature and the operating temperatures of the heat exchanger are interdependent, and the unit is to meet the requirements of both Clauses 7.2.1.4 and 7.6.1.5 when tested under site conditions of installation and operation. (3) The tests given in Clauses 7.2 to 7.5 should be conducted simultaneously, as these test groupings are particularly interdependent. Separate clauses have been indicated in these instances to clarify the statement of the test requirements.

7.1.4 For the purpose of these tests, the appliance shall be as normally supplied by the manufacturer, or as specified in the installation instructions. Equipment such as air filters, humidifiers, and controls that are regularly supplied by the manufacturer shall be in their specified positions.

7.1.5 The heating surfaces, appliance, air filters, flues, vent connectors, and chimney shall be clean and free from soot and dust at the beginning of each test. All vent (flue pipe) connections that may result in the introduction of air into the vent gases shall be sealed.

7.1.6 The instrumentation and methods of testing shall be in accordance with the procedures in CSA B140.0.

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7.2 Combustion 7.2.1 Test requirements 7.2.1.1 General The combustion shall be stable and complete under normal operating conditions at all rated fuel inputs.

7.2.1.2 Pulsation The appliance shall not pulsate when fired according to the manufacturer’s instructions and operated at the recommended draft, smoke density (spot), and fuel input. Note: A momentary pulsation following ignition from a “cold start” is permissible, but this is not to continue in subsequent cycles.

7.2.1.3 Smoke density The amount of smoke in the vent gases (the smoke density) shall not exceed that corresponding to a No. 1 Bacharach smoke spot except when fired with an oil of type No. 4 or heavier, in which case a No. 3 smoke spot shall apply when the appliance is tested in accordance with the procedures in Clause 7.2.2. Note: This requirement applies to all appliances regardless of the type of burner mechanism used (i.e., atomizing, wall-flame, or vaporizing oil burners.

7.2.1.4 Vent (flue) gas temperature 7.2.1.4.1 Except as stated in Clause 7.2.1.4.2, the maximum temperature of the vent (flue) gases shall not exceed 400 °C (750°F) (total) nor shall the minimum temperature of the vent gases be less than 150 °C (300°F) (total), when the appliance is tested in accordance with the procedures in Clause 7.2.2.

7.2.1.4.2 The maximum temperature of the vent (flue) gases at the vent collar of an appliance to be certified for use with a Type L vent shall be 300 °C (575°F).

7.2.2 Test procedures 7.2.2.1 The burner shall be adjusted to the maximum fuel input specified by the appliance manufacturer in the installation instructions, ± 2%, using the heaviest grade of fuel oil recommended by the manufacturer in the instructions.

7.2.2.2 Equipment intended for operation at more than one fixed fuel input value, for example, high-fire or pilot-fire, shall meet the requirements of Clause 7.2.1 when operated at all specified fuel input values.

7.2.2.3 The burner air adjustment shall be regulated to establish the air–fuel ratio recommended by the manufacturer in the installation instructions. The resulting smoke density shall not exceed that corresponding to a No. 1 Bacharach smoke spot. Notes: (1) For the purpose of these tests, the percentage of carbon dioxide (CO2) in the vent gases may be specified and used in establishing the recommended air–fuel ratio. (2) At the request of the manufacturer, the air–fuel ratio may be adjusted to produce that maximum percentage of carbon dioxide (CO2) in the vent gases consistent with the requirement that the smoke density not exceed a No. 1 Bacharach smoke spot.

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(3) The appliance should have been in operation at least a half hour before the results are recorded and adjustments made.

7.2.2.4 The smoke density shall be determined in accordance with the procedure in CSA B140.0.

7.2.2.5 For furnaces intended to be operated at negative vent outlet pressures, this pressure shall be adjusted to the maximum recommended by the manufacturer in the installation instructions, but shall not be greater than –5 Pa (– 0.02 in wc) nor less than that indicated in Table 2. For furnaces intended to be operated at positive vent outlet pressures, this pressure shall be adjusted to the maximum recommended by the manufacturer in the installation instructions. The maximum permissible vent outlet pressure for appliances having a rated output capacity in excess of 117 kW (400 000 Btu/h) shall be determined by special investigation.

7.2.2.6 The vent outlet pressure shall be determined in accordance with the procedure in CSA B140.0.

7.2.2.7 The vent gas temperature shall be determined in accordance with the procedure in CSA B140.0.

7.2.2.8 When such operating conditions as the air temperature rise or the external static pressure affect the observations required to determine compliance of the appliance with the requirements of Clause 7.2.1, the appropriate conditions specified in Clause 7.3 shall be established prior to making the required observations.

7.2.2.9 The temperature limit control shall be bypassed to permit continuous operation during the test. A blower control, if used, shall remain operative.

7.2.2.10 The required test observations shall be recorded after steady-state operating conditions have been established for the equipment. The combustion characteristics shall remain stable throughout the determination, as evidenced by consistent values being obtained for three consecutive sets of readings taken at 15 min intervals.

7.2.2.11 The observed combustion, the smoke density, and the vent gas temperature shall comply with the requirements of Clause 7.2.1.

7.3 Rated output capacity 7.3.1 Test requirements 7.3.1.1 Rated output capacity The manufacturer’s specified rated output capacity for the appliance shall not exceed by more than 2% the rated output capacity determined in accordance with the procedures in Clause 7.3.3. See also Clause 5.1.2(d).

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7.3.1.2 Maximum vent gas loss The maximum vent gas loss permitted for the purpose of conducting the rated output capacity rating test shall be 20%.

7.3.1.3 Air temperature rise The air temperature rise shall be not more than 47 + 3 °C (85 + 5°F) when the appliance is tested in accordance with the procedure in Clause 7.3.2. For appliances with inputs over 11.4 L/h (3 USgph), the air-temperature rise shall be as recommended by the manufacturer.

7.3.1.4 Special installations The requirements of Clause 7.3.1.3 and the related test procedure in Clause 7.3.2 shall not apply to appliances equipped with, and intended only for, installation with special types of distribution systems (pipes or ducts) for the heated air.

7.3.2 Test procedures 7.3.2.1 The appliance shall be installed in an area free of drafts, and shall be equipped with the necessary air ducts for test purposes. Note: For the purpose of these tests, the appliance may be installed within the appropriate temperature test enclosure described in Clause 7.6.2 when conducting the tests outlined in Clauses 7.3 to 7.5.

7.3.2.2 Unless the supply plenum or appliance bonnet is an integral part of the appliance, a metal plenum or bonnet having the same dimensions as the outlet-air opening of the appliance shall be used. The design shall be in accordance with Clause 11.

7.3.2.3 Appliance inlet-air temperatures shall be measured using a suitable device (e.g., thermocouple, thermometer), shielded from direct radiation and located in the centre of the plane of each inlet-air opening (see Clause 11).

7.3.2.4 Appliance outlet-air temperatures shall be measured using a suitable device (e.g., thermocouple, thermometer), located in a cross-sectional plane of each outlet-air duct. For unit heaters, the outlet-air temperature shall be measured by a single bead-type thermocouple, not larger than No. 24 AWG, located in the centre of the diamond-shaped air discharge opening of the test duct.

7.3.2.5 Appliance outlet-air temperature shall be the average of the temperatures indicated by at least five of the temperature-indicating devices arranged and positioned in the outlet-air duct as specified in Clause 11. The plane of the outlet-air temperature measurement shall be at least 300 mm (12 in) from the end of each outlet-air duct, and at a sufficient distance from the heat transfer surfaces to provide shielding of the thermocouples from radiation.

7.3.2.6 All limit controls shall be bypassed to permit continuous operation during the test.

7.3.2.7 The burner shall be firing at the maximum fuel input determined in Clause 7.2 and shall be operating under the conditions established in Clause 7.2.2.

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7.3.2.8 The circulating airflow shall be regulated by adjusting the speed or air delivery of the air-circulating blower to produce the rated air temperature rise ± 3 °C (± 5°F) through the appliance against the rated external static pressure. The external static pressure shall not be less than that specified in Table 3.

7.3.2.9 For an appliance having a rated output capacity in excess of 88 kW (300 000 Btu/h), the minimum external static pressure to be used for this test shall be determined by special investigation.

7.3.2.10 When air filters are not used with an appliance that is equipped to accommodate air filters, the appropriate external static pressure specified in Table 3 shall be increased by 20 Pa (0.08 in wc).

7.3.2.11 For furnaces, the required static pressure shall be measured at the supply plenum, as shown in Clause 11, and shall be imposed on the appliance by a restriction symmetrically applied at the end of each outlet-air duct.

7.3.2.12 The required test observations shall be recorded after steady-state operating conditions have been established for the equipment, as evidenced by equilibrium temperatures and consistent vent gas readings.

7.3.3 Determination of rated output capacity 7.3.3.1 When the conditions in Clauses 7.3.1 and 7.3.2 have been met, and with the possible modification through application of Clause 7.3.3.4, the rated output capacity for the appliance shall be determined on the basis of the following formula:

HO =

HI × 100 – (LF + LJ ) 100

where HO = Hl = LF = LJ =

heat output, kW (Btu/h) heat input, kW (Btu/h) vent-gas loss, expressed as a percentage of input casing loss, expressed as a percentage of input

7.3.3.2 The heat input in kW (Btu/h) shall be calculated on the basis of the method given in CSA B140.0.

7.3.3.3 The vent-gas loss (as a percentage of the input) shall be calculated on the basis of the method given in CSA B140.0.

7.3.3.4 A nominal casing loss factor of 1.5% of the heat input shall be used, except that when there is evidence of excessive heat loss through the appliance casing (i.e., where a casing is not insulated), or when a manufacturer specifically requests it, the actual casing loss of the appliance shall be determined as specified in CSA B140.0 and shall be used in the calculation of the rated output capacity. Note: Excessive heat loss means an actual loss corresponding to a casing loss factor in excess of 3% of the heat input.

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7.3.3.5 The test observations required in Clauses 7.3.3.2 to 7.3.3.4 shall be conducted with the equipment continuing in operation for at least one hour; and the required observations shall be recorded at the start of the one-hour period, and at the end of each of four consecutive 15 min intervals thereafter.

7.4 Temperature limit control performance 7.4.1 Test requirements 7.4.1.1 When adjusted to the maximum setting, the temperature limit control shall function to prevent an outlet-air temperature in excess of (a) 120 °C (250°F) for an appliance intended for installation with the appropriate standard clearances as specified in CSA B139 and for unit heaters except as specified in Item (b); or (b) 93 °C (200°F) for an appliance intended for installation with the appropriate standard clearances in CSA B139, or for installation in confined spaces (e.g., closets or alcoves). Note: Unless otherwise certified, the maximum limit temperatures for central furnaces should correspond to those listed in Table 4 of CSA B139.

7.4.1.2 The maximum outlet-air temperature limits specified in Clause 7.4.1.1 shall not apply to heating appliances equipped with and intended only for installation with special types of distribution systems (pipes or ducts) for the heated air. Such equipment shall be the subject of special investigation to determine the acceptability of the combination.

7.4.1.3 During normal operation of a horizontal furnace from a cold start, either a temperature limit control or the blower control shall function to prevent abnormal air temperature under conditions of reversed airflow through the furnace when the furnace is tested in accordance with the procedure in Clause 7.4.2.11.

7.4.1.4 An additional limit control test shall be performed in accordance with Clause 7.4.1.3 on horizontal and down-flow furnaces and on unit heaters with the blower circuit disconnected.

7.4.2 Test procedures 7.4.2.1 The appliance shall be installed and operated under the conditions specified in Clause 7.3, except as specified herein.

7.4.2.2 The temperature limit control shall be located and mounted in accordance with the installation instructions prior to conducting the test.

7.4.2.3 The temperature limit control shall be operative, and shall be adjusted to the maximum temperature setting allowed by its fixed stop and to the maximum indicated differential setting.

7.4.2.4 The outlet-air temperature of the appliance shall be measured by the procedure specified in Clause 7.3. The temperature at the sensing element of the temperature limit control shall also be recorded.

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7.4.2.5 The outlet-air opening of a unit heater having a single air outlet shall be fitted with a straight test duct extending 900 mm (36 in) from the face of the opening and shall have the same cross-sectional area and shape as the outlet opening. To restrict the outlet end of the test duct, an adjustable restrictor shall be provided that forms a centrally located diamond-shaped opening at the outlet.

7.4.2.6 For multi-outlet unit heaters, the measurement of the air temperature shall suit the application.

7.4.2.7 The outlet-air temperature, TL, at which the temperature limit control functions shall be established by the following procedure: (a) After equilibrium has been substantially obtained on the appliance, the circulating airflow shall be gradually symmetrically restricted by blocking the outlet-air and the inlet-air simultaneously, when possible, so that the rate of rise of the outlet-air temperature is approximately 0.5 °C (1°F) per minute. The blocking shall be continued at the specified rate, and the appliance shall be operated until the limit control functions to shut off or reduce the fuel input. (b) The outlet-air temperature shall be observed at the instant at which the limit control operates. (c) For unit heaters with inputs of 11.4 L/h (3 USgph) or less, when in equilibrium, a temperature rise of the air of not less than 28 °C (50°F) nor more than 61 °C (110°F) shall be obtained.

7.4.2.8 For forced-air furnaces, the appropriate external static pressure specified in Table 3, to be measured at the supply plenum, shall be maintained throughout the test.

7.4.2.9 The observed outlet-air temperature shall not exceed the applicable maximum value specified in Clause 7.4.1.1 by more than +3 °C (+ 5°F).

7.4.2.10 The following conditions shall be observed throughout the test: (a) The variation in the fuel input shall not exceed ± 2%. (b) For a forced-air furnace, the variation in external static pressure is not to exceed ± 5 Pa (± 0.02 in wc) from the specified static pressure.

7.4.2.11 The procedure to determine compliance of a horizontal furnace with the requirements of Clause 7.4.1.3 shall be as follows: (a) A rectangular duct, the same size as the inlet-air opening of the furnace, shall be attached to the inlet-air opening and shall be extended vertically upward to a distance of 1200 mm (4 ft) above the upper edge of the inlet-air opening. (b) A rectangular duct, the same size as the outlet-air opening of the furnace, shall be attached to the outlet-air opening and shall be extended vertically downward to a distance of 600 mm (2 ft) below the lower edge of the outlet-air opening. (c) The appropriate external static pressure specified in Table 3, to be measured at the supply plenum, shall be maintained throughout the test. (d) All limit controls shall be operative and shall be adjusted to the maximum setting and the minimum differentials. (e) The air temperature shall be determined by means of three thermocouples located in the plane of the inlet-air connection of the furnace, on a horizontal line one-third of the distance below the upper edge of the inlet-air opening. One thermocouple shall be located 25 mm (1 in) from one side of the opening, one at the centre, and the other 25 mm (1 in) from the opposite side of the opening.

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(f)

The furnace shall be operated under the conditions specified in Clause 7.3, from a cold start. The furnace shall be allowed to continue in operation until the blower becomes operative, or until the temperature limit control functions to shut off or reduce the fuel input. (g) The maximum temperature indicated by any one of the three thermocouples located at the inlet-air opening of the furnace shall not exceed the room ambient temperature by more than 65 °C (117°F) (based on a nominal room ambient temperature of 25 °C (77°F)), prior to or during the first or subsequent cycles of a temperature limit control or prior to the functioning of the blower control to circulate air in the normal manner.

7.5 Continuity of operation 7.5.1 Test requirements The appliance shall be capable of continuous operation when operated at maximum fuel input and rated output, without the temperature limit control functioning either completely or intermittently, to shut off or reduce the fuel input.

7.5.2 Test procedures 7.5.2.1 The appliance shall be installed and operated under the conditions specified in Clause 7.3, except as specified in Clause 7.5.2.2.

7.5.2.2 If the inlet-air temperature (T1) is higher than 25 °C (77°F) and the limit controls function, the controls shall be bypassed and the test continued, with no change in the inlet-air temperature until the outlet-air temperature (T2) becomes stabilized. The result is acceptable if T2 – T1 is equal to or less than TL – 28 °C (TL – 82°F).

7.6 Operating temperatures 7.6.1 Test requirements 7.6.1.1 The temperature of the materials and components of the equipment shall not exceed the allowable temperature limits when the appliance is installed and operated as recommended by the manufacturer and in accordance with the requirements specified in Clause 7.6.

7.6.1.2 The appliance shall be installed and operated in the appropriate temperature test enclosure, as described in Clauses 7.6.2 and 7.6.3, using the clearances to the enclosure as recommended by the manufacturer in the installation instructions. Notes: (1) Equipment intended for installation with standard clearances as specified in CSA B139 may be tested in a partial enclosure. (2) The clearance to surrounding combustibles may be measured from the outer surface of the supply plenum or appliance bonnet when a clearance is specified for that surface of an appliance incorporating the outlet-air opening.

7.6.1.3 The installation clearances and the type of enclosure recommended by the manufacturer shall be such that the operator and the personnel have sufficient and reasonable accessibility to all parts of the appliance requiring normal adjustment or maintenance.

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7.6.1.4 The appliance shall be operated and tested as specified in Clause 7.6.4.

7.6.1.5 The normal operating temperatures of the materials and components of the appliance shall not exceed the applicable maximum temperature limits specified for normal operation in CSA B140.0.

7.6.1.6 The maximum temperatures at the walls, floors (except for appliances intended for placement on non-combustible floors), overhead structures, or any other combustible surface of the test enclosure adjacent to the appliance shall not exceed the room ambient temperature by more than 65 °C (117°F), based on a nominal room ambient temperature of 25 °C (77°F). For appliances intended for placement on combustible floors, the temperature limit shall apply to the floor beneath and within 0.9 m (3 ft) of the appliance, plenums, and ducts. The temperature limit for overhead structures shall apply to the overhead structures above and within 0.9 m (3 ft) of the appliance, plenum, and ducts.

7.6.1.7 For attic furnaces (except at points within 230 mm (9 in) of the vent collar), and for furnaces intended for installation with no (zero) clearance to the surrounding combustible construction of the enclosure, the temperature limit specified in Clause 7.6.1.6 shall apply to the outer casing of the appliance being tested.

7.6.1.8 For appliances installed in alcoves or closets, or within similar confined enclosures, the room ambient temperature shall be considered that external to the enclosure proper and shall be determined as outlined in CSA B140.0.

7.6.1.9 The surface temperature of all hardware, such as handles, knobs, levers, etc., with which the operator may reasonably come in contact during normal operation and adjustment of the appliance shall not exceed the room ambient temperature by more than 35 °C (63°F), based on a nominal room ambient temperature of 25 °C (77°F).

7.6.1.10 The minimum temperature of all parts of the heat exchanger in contact with the vent gases shall be not less than 65 °C (150°F) based on a return temperature of 25 °C (77°F), after the furnace has been operated from a cold start for a period of 15 min. When lower temperatures are encountered, the suitability of the material used shall be determined by special investigation.

7.6.2 Test enclosures 7.6.2.1 General 7.6.2.1.1 The test enclosure in which the appliance is to be installed shall simulate, in each case, the actual installation conditions anticipated for the type of appliance.

7.6.2.1.2 The panels forming the test enclosure shall be made from 19 mm actual (1 in nominal) thick pine boards, or 19 mm (3/4 in) plywood, or the equivalent.

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7.6.2.1.3 All joints in the panels and the enclosure shall be sealed with adhesive paper tape, or the equivalent.

7.6.2.1.4 The enclosure floor that shall be used when the appliance is intended for placement on combustible flooring shall consist of superimposed layers of 19 mm (3/4 in) plywood or 19 mm actual (1 in nominal) pine boards, then building paper, and finally a top surface of 19 mm (3/4 in) plywood finished in dull (matte) black.

7.6.2.1.5 All panel faces exposed to the appliance, to the vent connector (flue pipe), and to similar hot surfaces of the equipment shall be finished in dull (matte) black (including the walls, ceilings, etc.).

7.6.2.1.6 Studs and joints employed for test enclosures shall have natural (unfinished) exposed faces.

7.6.2.2 Standard enclosure for floor-mounted appliances 7.6.2.2.1 The standard enclosure for floor-mounted appliances shall consist of three right-angled wall panels, each measuring 2.4 × 2.4 m (8 × 8 ft). The three exposed wall panel faces shall be painted dull (matte) black. See Figure 6.

7.6.2.2.2 The appliance shall be installed in the enclosure using the clearances recommended by the manufacturer. The clearance of the vent connector (flue pipe) to the enclosure panels shall be not less than 230 mm (9 in) when the appliance is installed.

7.6.2.2.3 The enclosure for appliances intended for placement on combustible floors shall include a floor panel measuring 2.4 × 2.4 m (8 × 8 ft), constructed as specified in Clause 7.6.2.1.4. See Figure 6.

7.6.2.2.4 The temperature shall be determined on the two wall panels adjacent to the appliance and also on the floor panel when the appliance is intended for placement on combustible floors. Note: A partial ceiling of 19 mm (3/4 in) plywood finished in dull (matte) black may be constructed inside the standard enclosure, located above the plenum and ductwork, for the purpose of determining the temperature on the exposed ceiling surface when using the duct clearances recommended by the manufacturer.

7.6.2.3 Alcove-type enclosure for floor-mounted appliances 7.6.2.3.1 The enclosure for appliances intended for alcove installation shall consist of three right-angled wall panels, a ceiling panel, and a floor panel, as shown in Figure 7. When used for testing an appliance intended to be installed on a combustible floor, the floor of the enclosure shall be constructed as specified in Clause 7.6.2.1.4. For an appliance that is intended for placement on non-combustible floors, the enclosure shall consist of three right-angled wall panels and a ceiling panel. The panel sizes shall depend on the equipment design and the installation clearances. The clearances to the side, rear, and ceiling panels shall be those recommended by the appliance manufacturer.

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7.6.2.3.2 All panels shall extend forward a distance of 1.2 m (4 ft) from the front of the appliance casing (jacket), as shown in Figure 7. The clearance of the vent connector (flue pipe) to the enclosure panels shall be not less than 230 mm (9 in) when the appliance is installed. The maximum height of the enclosure shall be 2.3 m (7 ft, 6 in). Note: The front of the appliance casing (jacket) is the panel on which the oil burner is mounted, or from which access to the oil burner is obtained.

7.6.2.4 Closet-type enclosure for floor-mounted appliances 7.6.2.4.1 The enclosure for appliances intended for closet installation shall consist of four right-angled wall panels, a ceiling panel, and a floor panel, as shown in Figure 8 or 9. When used for testing an appliance intended to be installed on a combustible floor, the floor of the enclosure shall be constructed as specified in Clause 7.6.2.1.4. For an appliance that is intended for placement on a non-combustible floor, the enclosure shall consist of four right-angled wall panels and a ceiling panel. The panel sizes shall depend on the equipment design and the installation clearances. The clearances to the side, rear, front, and ceiling panels shall be those recommended by the appliance manufacturer.

7.6.2.4.2 The front wall panel shall provide two openings into the enclosure space for ventilation and combustion air as shown in Figure 8, located so that the lower edge of the lower opening is 150 mm (6 in) above the enclosure floor, and the upper edge of the upper opening is 150 mm (6 in) below the enclosure ceiling. The area of each of the two openings shall be sized on the basis of 22 cm2/kW (1 in2/1000 Btu/h) of input to the appliance but not less than 645 cm2 (100 in2), unless otherwise specified by the appliance manufacturer. The height of each opening shall be one-half of the width.

7.6.2.4.3 The clearance of the vent connector (flue pipe) to the enclosure panels shall be not less than 230 mm (9 in) when the appliance is installed. The maximum height of the enclosure shall be 2.3 m (7 ft, 6 in).

7.6.2.5 Enclosures for downflow furnaces 7.6.2.5.1 The enclosures for downflow furnaces shall be constructed as described in (a) Clause 7.6.2.2 for a floor-mounted appliance; (b) Clause 7.6.2.3 for an alcove-mounted appliance; or (c) Clause 7.6.2.4 for a closet-mounted appliance as shown in Figure 10, depending on the type of installation recommended, with the exception of the floor panel.

7.6.2.5.2 The enclosure for a downflow furnace shall include a floor section simulating actual installation conditions. The floor section shall be constructed as specified in Clause 7.6.2.1.4 when the appliance is intended for placement on combustible floors. The floor section shall include provision for the passage of the outlet-air ducts or the supply plenum or both.

7.6.2.5.3 The clearance of the vent connector (flue pipe) to the enclosure panels shall be not less than 230 mm (9 in) when the appliance is installed. The maximum height of the enclosure shall be 2.3 m (7 ft, 6 in).

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7.6.2.6 Standard enclosure for horizontal furnaces 7.6.2.6.1 The standard enclosure for a horizontal furnace shall consist of a side panel and a rear panel at right angles to each other, with a panel above and a panel below the appliance, as shown in Figures 11 and 13. The front and air-inlet side of the appliance shall not be enclosed. The panel below the horizontal furnace shall be constructed as specified in Clause 7.6.2.1.4. The panel sizes shall depend on the equipment design and the installation clearances. The clearances to the side and rear panels and to the ceiling panels shall be those recommended by the appliance manufacturer.

7.6.2.6.2 All panels shall extend forward a distance of 900 mm (36 in) from the open front and side of the appliance casing (jacket) as shown in Figure 11. The inlet-air and outlet-air ducts shall pass through the open side and front of the enclosure. The clearance of the vent connector (flue pipe) to the enclosure panels shall be not less than 230 mm (9 in) when the appliance is installed.

7.6.2.6.3 For test purposes, a suspended horizontal furnace may be suspended in the enclosure using the means provided by the manufacturer, or the appliance may be mounted directly upon wooden support members or the equivalent.

7.6.2.7 Alcove and closet enclosures for horizontal furnaces The enclosures for horizontal furnaces intended for alcove or closet installation shall comply with the general requirements for such enclosures as outlined in (a) Clause 7.6.2.3 (alcove type) or Clause 7.6.2.4 (closet type); (b) Clause 7.6.2.6 (general requirements for the standard enclosure for horizontal furnaces); and (c) Figures 11 to 13.

7.6.2.8 Standard enclosure for unit heaters The heater shall be placed in a tunnel-type enclosure so that the clearance between the top of the heater and the ceiling is 150 mm (6 in). Clearance between the sidewalls and the heater shall be 450 mm (18 in). The enclosure shall extend at least 900 mm (36 in) beyond the front and back and 300 mm (12 in) below the heater as shown in Figure 15.

7.6.3 Installation methods 7.6.3.1 The appliance shall be installed in the appropriate enclosure in accordance with the manufacturer’s installation instructions.

7.6.3.2 The enclosure shall be located in an area that is free of drafts to minimize the effects of drafts on the temperature determinations.

7.6.3.3 All equipment wiring should be completed by the manufacturer on all appliances submitted for test.

7.6.3.4 The controls shall be located as specified in the installation instructions, unless integral with the equipment.

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7.6.3.5 For forced-air furnaces, the plenum or bonnet and the test ducts required in Clause 7.3.2.2 shall be installed.

7.6.3.6 The vent connector (flue pipe) shall be the same nominal size as the vent collar of the appliance. Black stove pipe not heavier than No. 24 gauge shall be used for the purpose of these tests, and all joints shall be sealed.

7.6.3.7 When required, a suitable draft regulator shall be provided for test purposes and shall be located outside the test enclosure (see Clause 4.12). A draft regulator forming an integral part of the equipment shall be sealed, and a separate regulator shall be provided for test purposes.

7.6.4 Test procedures 7.6.4.1 The following conditions shall be observed throughout the test: (a) the variation in fuel input shall not exceed ± 2%; (b) the burner firing conditions shall remain stable, as indicated by consistent chimney drafts, smoke density, and vent gas temperature readings; and (c) for forced-air furnaces, (i) the air temperature rise shall be maintained at the appropriate value ± 3 °C (± 5°F); and (ii) the variation in static pressure shall not exceed ± 5 Pa (± 0.02 in wc) from the specified static pressure.

7.6.4.2 The test shall be continued until equilibrium temperatures have been attained, as evidenced by consistent values being obtained for three consecutive sets of readings taken at 15 min intervals. The temperatures shall be recorded at regular intervals throughout the test.

7.6.4.3 The maximum temperatures attained, especially by the heat exchanger and combustion chamber, before the blower starts to circulate the air and when the blower control is adjusted to maximum setting, shall comply with the requirements specified in Clause 7.6.1.5.

7.6.4.4 Tests for minimum heat exchanger temperatures shall be conducted with the appliance operating at the minimum fuel input and at the recommended temperature rise.

7.7 Motor rating — Air-circulating blowers and fans 7.7.1 Test requirements 7.7.1.1 The brake load imposed on the motor under the test conditions specified in Clause 7.7.2 shall not exceed the kW (hp) rating of the motor.

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7.7.1.2 When the ambient air temperature at the blower motor exceeds (a) 30 °C (86°F) for motors rated less than 746 W (fractional horsepower motors); or (b) 40 °C (104°F) for motors rated at or more than 746 W (integral horsepower motors), the motor winding temperatures shall not exceed the maximum values specified in CSA C22.2 No. 3, and the motor shall be acceptable on a non-interchangeable basis when tested under the conditions specified in Clause 7.7.2.

7.7.2 Test procedures 7.7.2.1 The appliance shall be operated at maximum fuel input, with all controls bypassed to permit continuous operation during the test. The circulating air blower speed, when adjustable, shall be adjusted to deliver the maximum available air volume using the combination of pulleys provided. The blower motor shall be operated at rated voltage and frequency. An external static pressure shall be imposed by a restriction symmetrically applied at the end of each outlet-air duct, as specified in Table 4.

7.7.2.2 For an appliance having a rated output capacity in excess of 88 kW (300 000 Btu/h), the external static pressure to be used for this test shall be determined by special investigation.

7.7.2.3 The required static pressure shall be measured at the supply plenum as specified in Clause 11.

7.7.2.4 The static pressure values given in Table 4 shall not apply to those appliances intended for use without ductwork, air filters, or for use with limited duct systems. For such appliances, the value of static pressure selected for this test shall be based on the intended application of the appliance.

7.7.2.5 The static pressure values given in Table 4 shall not apply to special appliance designs. The values of static pressure selected for this test shall be based upon consideration of the equipment design and the intended application.

7.7.2.6 For propeller-type unit heaters, the louvres, when provided, shall be adjusted to impose the maximum motor loading.

7.8 Seepage In the event of ignition failure, the resulting unburnt fuel shall not leak through the bottom of the heat exchanger when the fuel has flowed into the appliance at maximum input for 5 min.

7.9 Flooding 7.9.1 The flooding test shall be applied to appliances equipped with vaporizing burners.

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7.9.2 With the appliance levelled, the burner shall not discharge fuel when the fuel level in the burner is 19 mm (3/4 in) higher than the fuel operating level in the fuel level regulator. When the differential fuel level between burner and regulator is difficult to ascertain, the 19 mm (3/4 in) difference shall be increased to 25 mm (1 in).

7.9.3 Where the fuel level regulating device is designed to trip the shutoff valve mechanism when the oil in the burner is at a lower level than the fuel operating level of the device, the tripping level shall replace the operating level in the test.

7.10 High static pressures 7.10.1 Test requirements 7.10.1.1 The appliance wiring shall be of a size adequate for the largest load when a furnace is intended to operate at high external static pressures.

7.10.1.2 When test results indicate an abnormal condition between minimum and maximum external static pressures, the necessity for the following tests at intermediate static pressures shall be determined by the testing agency: (a) for temperature limit control performance, see Clause 7.4; (b) for operating temperatures, see Clause 7.6; and (c) for abnormal voltages, see Clause 8.4.

7.10.2 Test procedure When external static pressures differ from Table 4, the test procedures shall comply with Clause 7.7.2, except for the external static pressures as specified by the manufacturer.

8 Abnormal tests 8.1 General 8.1.1 When tested under such abnormal conditions as are likely to occur in service, as specified in Clause 8, the operation of the appliance shall not be hazardous to life or property.

8.1.2 The abnormal tests to be applied to a specific appliance shall be based on the abnormal operating conditions likely to occur for the type of appliance.

8.1.3 The applicable provisions of Clauses 7.1.3 to 7.1 6 shall apply when conducting the abnormal tests in Clause 8.

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8.2 Abnormal operation temperatures 8.2.1 The following abnormal operation temperature tests shall be conducted on each appliance at the conclusion of the test specified in Clause 7.6: (a) a blocked inlet-air test shall be conducted by gradually closing off the inlet-air openings or by restricting the circulating airflow through the air filters; (b) a blocked outlet-air test shall be conducted by gradually closing off the outlet-air opening; and (c) a disconnected blower test shall be conducted on forced-air furnaces by disconnecting the blower motor from the electrical circuit and (i) allowing the burner and other equipment to continue in operation; and (ii) firing the appliance from a cold start.

8.2.2 The test enclosure, the installation methods, and the operating conditions shall be as outlined in Clauses 7.6.2 to 7.6.4, except that all limit controls shall be operative and adjusted to the maximum settings and the minimum differentials.

8.2.3 For furnaces, the circulating airflow shall be regulated, using the procedure specified in Clause 7.6.4, to establish an outlet-air temperature that is sufficiently below that required for operation of the temperature limit control to allow continuous operation of the appliance while normal equilibrium operating temperatures are being established.

8.2.4 For forced-air furnaces, the appropriate external static pressure specified in Table 3, measured at the supply plenum, shall be maintained while normal equilibrium operating temperatures are being established.

8.2.5 The applicable conditions specified in Clause 7.6.4.1 shall be observed throughout each test.

8.2.6 Each test shall be conducted after normal equilibrium operating temperatures have been established for the appliance.

8.2.7 Each test shall be continued with the appliance cycling on the limit control until equilibrium or receding temperatures are attained.

8.2.8 For each of these tests, the maximum temperature attained during the period beginning immediately following the first shutoff effected by the limit control, and terminating 1 h after the first shutoff, shall be within those temperature limits prescribed for abnormal operation in CSA B140.0.

8.2.9 For each of these tests, the maximum temperatures attained during the one-hour period specified in Clause 8.2.8 at the walls, floors (except for appliances intended for placement on non-combustible floors), overhead structures, or other combustible surfaces of the test enclosure adjacent to the appliance shall not exceed the room ambient temperature by more than 108 °C (194°F), based on a nominal room ambient temperature of 25 °C (77°F).

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For appliances intended for placement on combustible floors, the temperature limit shall apply to the floor beneath and within 0.9 m (3 ft) of the appliance, plenums, and ducts. The temperature limit shall apply to overhead structures above and within 0.9 m (3 ft) of the appliance, plenum, and ducts.

8.2.10 For attic furnaces and for appliances intended for installation with no (zero) clearance to the surrounding combustible construction of the enclosure, the temperature limit specified in Clause 8.2.9 shall apply to the outer casing of the appliance being tested.

8.2.11 Following the one-hour period specified in Clause 8.2.8, for each test, the temperatures referred to in Clauses 8.2.8 to 8.2.10 shall not exceed the limits specified for normal operation in CSA B140.0. Note: The degree of hazard involved will be the basis of interpretation of Clause 8.2.11, e.g., temperatures of components located within the return-air compartment may be considered as most critical because of their location in an air-circulating duct system.

8.3 Abnormal vent outlet pressures 8.3.1 The ignition and operation of the appliance shall be safe and reliable under abnormal vent outlet pressure conditions.

8.3.2 Under abnormal vent outlet pressure conditions, only a momentary pulsation is permissible following ignition and/or shutdown. The test shall be started with cold appliances.

8.3.3 For the purpose of this test, the abnormal vent outlet pressure conditions include vent outlet pressures that shall be from (a) –5 to –20 Pa (–0.02 to –0.08 in wc) for appliances with rated output capacity up to 47 kW (160 000 Btu/h); and (b) –7.5 to –30 Pa (–0.03 to –0.12 in wc) with rated output capacity in excess of 47 kW (160 000 Btu/h).

8.3.4 For appliances that are intended to be used without a draft regulator, the vent outlet pressures shall be (a) –5 to –30 Pa (–0.02 to –0.12 in wc) for appliances with rated output capacity up to 47 kW (160 000 Btu/h); and (b) –7.5 to –37 Pa (–0.03 to –0.15 in wc) with rated output capacity in excess of 47 kW (160 000 Btu/h).

8.3.5 The requirements given in Clauses 8.3.3 and 8.3.4 are based on the anticipated normal vent outlet pressure of (a) –10 Pa (–0.04 in wc) for most residential installations that are rated less than 88 kW (300 000 Btu/h) output; and (b) –15 Pa (–0.06 in wc) for residential installations that are rated in excess of 88 kW (300 000 Btu/h) output. Special consideration shall be required for equipment intended primarily for commercial or industrial applications. The recommended vent outlet pressure value given in the manufacturer’s installation instructions shall be used in determining suitable abnormal vent outlet pressure value in these instances.

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9 Burner tests 9.1 Vaporizing-type burners Vaporizing-type burners provided with appliances shall meet the test requirements of CSA B140.1, including ignition, seepage, and other burner and component tests that are applicable.

9.2 Atomizing-type burners Atomizing-type burners provided with appliances shall meet the test requirements of CAN/CSA-B140.2.1, including ignition, after-drip, pressure, and other burner and component tests that are applicable.

10 Oil-fired heating/cooling appliances primarily for outdoor installation 10.1 General 10.1.1 These are additional requirements that apply to oil-fired heating appliances and to combination heating/cooling appliances (hereafter referred to as appliances) primarily intended for outdoor installation.

10.1.2 These requirements also apply to oil-fired appliances that have gas-fired pilots and to oil-fired appliances that may be gas-fired as an alternative, except that the requirements for the gas features of such appliances are covered by ANSI Z21.47/CSA 2.3.

10.2 Construction requirements 10.2.1 General 10.2.1.1 The appliances shall comply with the specific Standards relating to the type of equipment involved.

10.2.1.2 Appliances shall be constructed entirely of new, unused parts and materials.

10.2.1.3 All components requiring protection from climatic conditions shall be adequately protected.

10.2.1.4 An appliance that requires a venting system and that is not suitable for use with a conventional system shall be provided with a system as part of the appliance. Venting systems that are a part of the appliance shall be provided with means for secure attachment to the appliance.

10.2.2 Assembly The appliance, if not completely assembled by the manufacturer, shall be arranged in as few sub-assemblies as practicable. Each sub-assembly shall be capable of being incorporated readily into the final assembly without requiring alteration, cutting, drilling, threading, welding, or similar tasks by the installer. In the case of two or more sub-assemblies, each of which must bear a definite relationship to each other for the proper and safe operation of the equipment, they shall be arranged and constructed to allow and

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facilitate their being joined to the appliance without need for alteration or adjustment except for the correct relationship with each other; or such sub-assemblies shall be assembled, tested, and shipped from the factory as one element.

10.2.3 Accessibility 10.2.3.1 All controls shall be accessible for normal servicing and functional adjustment in position and shall be replaceable during normal servicing. Removal of an access panel or door to secure access to a control compartment shall be considered acceptable.

10.2.3.2 Access panels and such insulation as need be removed for normal service and accessibility shall be designed so that repeated removal and replacement will not cause damage or impair insulating value.

10.2.3.3 Outdoor weatherproofing shall not reduce or limit the accessibility for inspection, servicing, and cleaning of the equipment.

10.2.3.4 Provision shall be made for the observation of smoke or reflected light to detect the presence of leaks in the heating surfaces. The cover for the opening(s) shall be attached in such a manner as to prevent leaks. The manufacturer’s installation instructions for the provision of such openings in the ductwork shall be deemed to comply with the provision of this requirement.

10.2.4 Combustion air and ventilation 10.2.4.1 Cabinet compartments housing controls shall be adequately ventilated.

10.2.4.2 Combustion air for burner and pilot operation shall not be drawn from the circulating airstream, unless adequate provision is made to preclude contamination of the circulating airstream under any conditions.

10.2.4.3 When air for combustion is drawn through removable panels, such panels shall be designed so as to prevent them from being attached in an improper position or being interchanged with other panels on the same appliance in a manner that may interfere with the performance of the appliance.

10.2.4.4 All outside inlet-air openings shall be such as to prevent the entrance of a 13.1 mm (33/64 in) diameter rod. Minimum dimension requirements for louvred openings shall be 9.5 mm (3/8 in), unless the maximum dimension of the opening is at least 12.7 mm (1/2 in), in which case the minimum dimension of the opening shall be not less than 6.4 mm (1/4 in).

10.2.4.5 The bottom of the combustion air openings shall not be less than 300 mm (12 in) above the bottom of the cabinet, nor less than 300 mm (12 in) above any other surface of the cabinet that could support snow, ice, or debris.

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10.2.5 Main flame observation Provision shall be made to permit satisfactory observation of the main flame under operating conditions. A panel may be removed to permit observation, provided that the combustion is not affected.

10.2.6 Appliance openings 10.2.6.1 Compartment doors shall be constructed so that they will not be interchangeable when their interchange would interfere with combustion and proper operation of the appliance.

10.2.6.2 Any access door or panel shall be constructed so that with the door or panel in place, water will not accumulate within the appliance.

10.2.6.3 Any access door or panel shall require the use of a tool to open.

10.3 Electrical equipment and wiring 10.3.1 Electrical equipment and wiring shall comply with the applicable sections of the Canadian Electrical Code, Part I and Part II.

10.3.2 All components requiring protection from climatic conditions shall be adequately protected.

10.4 Marking 10.4.1 Rating plate 10.4.1.1 Appliances shall bear a permanent rustproof metal plate attached to a panel not normally removed for servicing, located where it can be easily read when the appliance is in a normally installed position, on which shall appear the data required by the applicable Standard(s).

10.4.1.2 The rating plate or a separate plate attached adjacent to the rating plate shall be permanently marked with the following details: (a) the minimum ambient air temperature at which the appliance may be started; (b) the grade of fuel oil required in starting the appliance at the minimum ambient air temperature specified; and (c) the type of appliance, i.e., “Heating Appliance” or “Combination Heating and Cooling Appliance”.

10.4.2 Additional marking 10.4.2.1 An appliance designed for outdoor installation only shall bear a statement reading FOR OUTDOOR INSTALLATION ONLY. An appliance designed for indoor or outdoor installation without changes shall bear a statement reading FOR INDOOR OR OUTDOOR INSTALLATION.

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10.4.2.2 An appliance shall bear a permanent marking indicating the type of base or floor construction (combustible or non-combustible) on which the appliance may be installed.

10.4.2.3 An appliance shall bear a permanent marking indicating the vent or over-fire pressure (plus or minus) required.

10.5 Performance requirements 10.5.1 Surface temperatures 10.5.1.1 For appliances intended for use for installation on combustible material, the maximum temperature on the floor upon which the appliance, as shipped by the manufacturer, is installed shall not exceed 90 °C (194°F) total.

10.5.1.2 For the purpose of this test, the temperature shall be corrected to a base of 25 °C (77°F) and the appliance shall be fired as required by the temperature test section of the applicable Standard.

10.5.2 Optional reduced clearances 10.5.2.1 Appliances intended for installation at clearances of less than 300 mm (12 in) to combustible construction shall not result in temperatures exceeding 90 °C (194°F) total on the combustible construction when tested at the clearances specified by the manufacturer.

10.5.2.2 For the purpose of this test, the temperature shall be corrected to a base of 25 °C (77°F) and the appliance shall be fired as required by the temperature test section of the applicable Standard.

10.5.3 Simulated rain test 10.5.3.1 General 10.5.3.1.1 When the outdoor appliance is exposed to the test described in Clause 10.5.3.2, the appliance shall function normally during and after the test.

10.5.3.1.2 Water shall not enter the enclosure such that it (a) is sufficient to interfere with normal operation; (b) will accumulate in any appreciable quantity; or (c) will drain through the means provided for any electrical connection.

10.5.3.1.3 After exposure to the test described in Clause 10.5.3.2, the appliance shall be subjected immediately to the insulation resistance test described in Clause 10.5.3.3, and then to the dielectric strength test described in Clause 10.5.3.4.

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10.5.3.2 Simulated rain test procedure An artificial rain shall be applied (a) at an angle of approximately 45° to the vertical, to the top and sides of the appliance in the direction that will most likely cause water to enter the enclosures and fittings; and (b) for 1 h, at the rate of 3 mm/min (7 in/h). The rate of rainfall shall be determined by measuring the rise of water in a small straight-sided pan placed horizontally and completely within the area covered by the rain.

10.5.3.3 Insulation resistance test The insulation resistance between current-carrying parts and exposed non-current-carrying metal parts shall be not less than 50 000 Ω at the completion of a 1 min application of a 500 V dc test voltage.

10.5.3.4 Dielectric strength test The low potential circuit shall withstand the application of an ac potential between current-carrying parts and any non-current-carrying metal parts that may be grounded for a period of 1 min without breakdown. For equipment having motors of 375 W (1/2 hp) and larger and of any rated voltage from 31 to 750 V, or having pre-heaters rated at more than 300 V, the ac potential shall be 1000 V plus twice the rated voltage. For equipment having motors of less than 375 W (1/2 hp) and of any rated voltage from 31 to 300 V, or having pre-heaters rated at 300 V or less, the ac potential shall be 1000 V. For extra low potential circuits and for motors operating at 30 V or less, the ac potential shall be 500 V. Devices such as cadmium cells that would be damaged by this test potential shall be disconnected.

10.5.4 Simulated wind test 10.5.4.1 The burner shall be capable of being ignited and shall operate normally when subjected to a wind velocity of up to 64 km/h (40 mph). The test shall be carried out in the following manner: (a) The outer surface of the appliance shall be subjected to incremental wind velocities produced by a blower up to a maximum of 64 km/h (40 mph). The appliance shall continue to operate safely and reliably under these conditions. The wind directions shall be those deemed to be most critical to the particular appliance being tested. (b) The blower shall be located so that a uniform draft covering at least the vertical projected area of the appliance is directed toward the appliance at a velocity of up to 64 km/h (40 mph) that shall not vary by more than –0% +10% measured at each of nine or more locations 760 mm (30 in) from the windward side of the appliance. (c) The wind shall be directed horizontally, and at 15° upward and 15° downward from the horizontal.

10.5.4.2 For each wind velocity and direction, the appliance shall be tested for safe ignition, operation, and shutdown. Combustion performance, including the flame characteristics, under the conditions of Clause 10.5.4.1 shall meet the limitations of Clause 7.

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11 Plenums, test ducts, and air temperature measurement for forced-air furnaces 11.1 General 11.1.1 Clause 11 outlines the details pertaining to the supply plenum and test ducts to be used in conjunction with forced-air furnaces, when tested in accordance with the procedures outlined in this Standard.

11.1.2 Information concerning instrumentation, such as air temperature measurement, is also included.

11.2 Reference figures Figures 1 to 5 show the details of design and application, as follows: (a) Figure 1 illustrates the test duct, air temperature, and test point locations for in-line furnaces. The appliance is shown installed in the standard temperature test enclosure (refer to Clause 12). (b) Figure 2 illustrates the test duct, air temperature, and test point locations for upflow furnaces. (c) Figure 3 illustrates the test duct design details for forced-air furnaces and the details pertaining to inlet-air temperature measurement. (d) Figure 4 illustrates the details pertaining to outlet-air thermocouple placement in rectangular and round outlet ducts. (e) Figure 5 illustrates some details on temperature measurement.

11.3 Details of design and application 11.3.1 Each forced-air furnace submitted for test shall be provided with a suitable supply plenum and the test ducts for the inlet and outlet air. The details pertaining to the supply plenum and outlet-air duct to be provided for test purposes shall comply with the designs shown in Figure 3.

11.3.2 For special appliance designs, the manufacturer shall provide the supply plenum and ductwork normally furnished with the appliance, together with complete instructions for their adaptation to the appliance.

11.3.3 The open end of the outlet-air duct shall be provided with two-piece sliding dampers, as shown in Figure 3, for the purpose of obtaining the required external static pressure for the appliance.

11.3.4 The outlet-air temperature shall be measured by means of bead-type thermocouples having diameters not exceeding No. 24 AWG, located in a cross-sectional plane of each outlet-air duct, at least 300 mm (12 in) from the open end of the duct, and at a sufficient distance from the heat transfer surfaces to provide shielding of the thermocouples from radiation.

11.3.5 Not less than five thermocouples shall be installed in the cross-sectional plane of the outlet-air duct, with one junction at the centre and the other four junctions placed on the diagonals drawn between the four corners of the test duct and located one-half of the distance from the centre to the corners of the duct (see Figure 4).

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11.3.6 When the furnace outlet openings are designed to accommodate round pipe, five thermocouples shall be installed in each outlet-air duct, with one junction at the centre and the other four placed 90° apart and two-thirds of the distance from the centre to the perimeter of the duct (see Figure 4).

11.3.7 The outlet-air temperature shall be the average of the temperatures indicated by the thermocouples.

11.3.8 The average outlet-air temperature should be recorded throughout the test.

11.3.9 The inlet-air temperature shall be measured by means of a single No. 24 AWG bead-type thermocouple, suitably shielded from direct radiation and located in the centre of the plane of each inlet-air opening.

11.3.10 Suitable precautions shall be taken in the placement of the inlet-air and outlet-air ducts to ensure that any unfavourable effects, such as may be created by excessive inlet-air temperatures or temperature variations, or by sporadic room drafts or backdrafts, are reduced to a minimum or eliminated wherever possible. Due allowance shall be made for any suspected errors introduced by any such unfavourable effects.

11.3.11 A relatively uniform inlet-air temperature (free from fluctuations) shall be maintained throughout the tests. The inlet-air temperature variation should not exceed 5.5 °C (10°F) during the course of a given test. If room drafts are present, suitable precautions shall be taken, such as shielding the inlet-air thermocouples, to ensure reliability of results. Note: Refer to CSA B140.0 for details of the correction to be applied for ambient temperatures other than normal 25 °C (77°F) and limitations of the range of ambient temperatures during tests.

11.3.12 The air passage from the discharge opening of the outlet duct shall be free and unrestricted, except for the sliding dampers used to regulate the external static pressure of a forced-air furnace. No obstruction shall be located within 1.8 m (6 ft) axially from the discharge opening of the outlet duct.

11.3.13 The static pressure shall be measured by a suitable gauge, e.g., inclined draft gauge. The static pressure tube shall consist of a length of 6.4 mm (1/4 in) OD tubing soldered to the surface of the duct, and centred over a hole 1 mm (0.04 in) in diameter drilled through the duct. The tube shall be located in the supply plenum as shown in Figures 1 and 2. The end of the tube shall be flush with the plenum casing, and the inside surfaces shall be free from burrs and irregularities. Note: The static pressure tube may be located on any plane of the plenum or bonnet, except the top or on a plane where it will interfere with the location of the temperature limit control (plenum or bonnet-mounted control).

11.3.14 The combustion determinations shall be measured in the vent connector (flue pipe) in accordance with the procedures and locations given in CSA B140.0. See also Figure 1.

11.3.15 The appliance may be tested when installed within the appropriate enclosure required for the operating temperatures test.

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12 Test enclosures and installation methods for temperature tests 12.1 General 12.1.1 Clause 12 outlines the details pertaining to the temperature test enclosures required for various types of appliances when tested in accordance with the procedures outlined in this Standard.

12.1.2 Clause 7.6.2 should be consulted in connection with the descriptions and illustrations given in Clause 12.

12.2 Reference figures Figures 6 to 15 show the details of design and application, as follows: (a) Figure 6 illustrates the standard-type enclosure to be used for floor-mounted appliances (see also Figure 1). (b) Figure 7 illustrates alcove-type enclosure to be used for floor-mounted appliances. (c) Figure 8 illustrates the exterior of the closet-type enclosure to be used for floor-mounted appliances. (d) Figure 9 illustrates the placement of an appliance inside the closet-type enclosure. (e) Figure 10 illustrates the placement of a downflow furnace appliance inside a closet-type enclosure. Details of the test enclosure are shown in cross-section. (f) Figure 11 illustrates the standard-type enclosure to be used for horizontal furnaces. (g) Figure 12 illustrates the exterior of a closet-type enclosure to be used for horizontal furnaces. (h) Figure 13 illustrates the test duct and thermocouple locations for horizontal furnaces and the placement of appliances in standard-type enclosures. (i) Figure 14 illustrates the method to be used for the sealing of an annulus around a vent connector (flue pipe). (j) Figure 15 illustrates the standard-type enclosure to be used for unit heaters.

12.3 Details of design and application 12.3.1 The enclosure shall be located in an area reasonably free from drafts.

12.3.2 The construction of the enclosure, the materials, and the finish shall be in accordance with the requirements given in Clause 7.6.2.

12.3.3 The dimensions of the enclosure, and the placement of the appliance within the enclosure, shall be based on the manufacturer’s recommendations in the installation instructions and shall be in accordance with the requirements given in Clauses 7.6.2 and 7.6.3.

12.3.4 The test ducts, as outlined in Clause 11, shall be installed on the appliance.

12.3.5 All test ducts shall be of sufficient length to extend away from the panel surfaces a sufficient distance to prevent the circulating air from affecting the panel surface temperatures.

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12.3.6 The room ambient air shall be determined by means of the shielded thermocouple illustrated in Figure 5(a).

12.3.7 For closet installations, the room ambient temperature shall be considered as external to the enclosure proper and shall be determined by means of a shielded thermocouple placed at the centre of the lower ventilation opening.

12.3.8 For alcove installations, the room ambient temperature shall be considered as external to the enclosure proper and shall be determined by means of a shielded thermocouple placed in the centre of the inlet-air opening.

12.3.9 For all other installations, the room ambient temperature shall be determined by means of the shielded thermocouple described in Clause 12.3.6, located in the vicinity of the appliance, and in an area reasonably free of drafts.

12.3.10 The inlet-air and outlet-air temperatures shall be determined in accordance with Clause 11.

12.3.11 All enclosure openings, such as cracks, shall be sealed with suitable tape.

12.3.12 When the vent pipe passes through an enclosure panel, the construction shown in Figure 14 shall be used.

12.3.13 The openings between the floor and the base of a downdraft furnace shall not be sealed unless the manufacturer specified sealing in the installation instructions.

12.3.14 Ventilating openings provided for closet-type enclosures shall be sized in accordance with Clause 7.6.2.4 and shall be located as shown in Figures 8, 10, and 12. The dimensions of each ventilation opening shall be such that the width of the opening is twice the depth.

12.3.15 A floor panel, constructed as specified in Clause 7.6.2.1.4, shall be included as part of the enclosure for all appliances intended for placement on combustible flooring.

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Table 1 Thickness of plain carbon steel for heat exchangers (See Clauses 4.11.5, 4.13.3, and 4.13.4.) Rated output capacity, kW (Btu/h)

Minimum thickness, mm (in)

Manufacturer’s standard gauge

Up to 22 (75 000)

1.06 (0.0418)

18

Over 22 to 58 (75 000 to 200 000)

1.34 (0.0528)

16

Over 58 to 117 (200 000 to 400 000)

1.69 (0.0667)

14

Over 117 (400 000)

See Clause 4.13.5

—

Table 2 Minimum permissible vent outlet pressure (See Clause 7.2.2.5.) Rated output capacity, kW (Btu/h)

Minimum permissible vent outlet pressure, Pa (in wc)

Up to 47 (160 000)

–10 (–0.04)

Over 47 to 117 (160 000 to 400 000)

–15 (–0.06)

Table 3 External static pressures for the rated output capacity test (See Clauses 5.1.2, 7.3.2.8, 7.3.2.10, 7.4.2.8, 7.4.2.11, and 8.2.4) Rated output capacity, kW (Btu/h)

External static pressure, Pa (in wc)

Up to 47 (160 000)

50 (0.20)

Over 47 up to 88 (160 000 up to 300 000)

62 (0.25)

Over 88 (300 000)

Refer to Clause 7.3.2.9

Table 4 External static pressure for the blower motor rating test (See Clauses 7.7.2.1, 7.7.2.4, 7.7.2.5, and 7.10.2.)

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Rated output capacity, kW (Btu/h)

External static pressure, Pa (in wc)

Up to 47 (160 000)

50 (0.20)

Over 47 up to 88 (160 000 up to 300 000)

62 (0.25)

Over 88 (300 000)

Refer to Clause 7.7.2.2

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Inlet-air duct

Flue-gas analysis (see text for details)

Inlet-air temperature (see Figure 3)

Plane of outlet-air temperature measurement (see Figure 4) Adjustable symmetrical air-damper

Shield Outlet-air duct

Appliance

Static pressure gauge tube to be flush with inside duct wall

Floor included for units to be mounted on combustible floors

Side view shown Note: The appliance is shown in a standard test enclosure.

Figure 1 Duct, air temperature, and test point locations for in-line appliances (See Clauses 11.2, 11.3.13, 11.3.14, and 12.2 and Figure 6.)

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Top view of outlet-air duct

Outlet-air duct (see Note (2)) Plane of outlet-air temperature measurement (see Figure 4)

Static pressure gauge tube to be flush with inside duct wall Adjustable symmetrical air-damper

Shield Inlet-air duct (see Note (1))

Appliance

See text for details of flue-gas analysis

Temperature of inlet air Notes: (1) The inlet-air ducts for downflow, closet, alcove, and horizontal appliances shall extend at least 300 mm (12 in) outside the enclosure wall or ceiling. (2) The outlet-air ducts for all installations shall extend at least 600 mm (24 in) outside the enclosure.

Figure 2 Duct, air temperature, and test point locations for upflow appliances (See Clauses 11.2 and 11.3.13.)

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Plane of outlet-air thermocouple placement (see Figure 4)

900 (36) min. Plane of outletair thermocouple placement (see Figure 4)

Two-piece sliding damper

150 (6) 25 min. (1)

600 (24) min.

Y For duct sizing see Note (9)

Z+ Z

X+Y 6

X+Y 6 300 (12) X min. Alternate 1200 (48) duct sizing recommended method

Two-piece sliding damper arrangement

X

Y

Plenum and outlet duct for all furnaces

Inlet-air thermocouple

300 (12) min.

150 (6)

X

Y

Inlet duct for all furnaces X Y X 1200 (48) Y Two-piece sliding damper

150 (6) 600 (24) Y

150 (6) 1/3 Y Y 25 (1) 1/2 X

Plenum and outlet duct for horizontal furnace reverse flow test only

Three thermocouples at inlet opening

Inlet duct for horizontal furnace reverse flow test only

Figure 3 Test duct design features (See Clauses 11.2, 11.3.1, and 11.3.3 and Figure 1.)

(Continued)

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Notes: (1) All dimensions are given in mm (in). (2) Dimensions X and Y correspond to the dimensions of the inlet-air and outlet-air openings of the furnace. (3) Dimension Z shall be between 150 and 450 mm (6 and 18 in). (4) For downflow furnaces, dimension Z shall be 250 mm (10 in) plus the manufacturer’s recommended clearance above the warm air duct. (5) The outlet-air plenum or inlet-air duct shall extend outside of the wall, floor, or ceiling of the test enclosure where used. (6) A symmetrical pivot-type damper may be used instead of the two-piece sliding damper shown. (7) For furnaces employing a plenum-mounted control, the bottom of the horizontal outlet duct shall be at least 150 mm (6 in) above the manufacturer’s recommended location for the control. (8) For downflow or inline furnaces intended for reduced clearance installation, the inlet-air ducts shall be similar in design to the outlet-air duct shown in this Figure, except that the 1200 mm (48 in) dimension may be reduced provided that the duct still extends to the outside of the enclosure. (9) The approximate cross-sectional area of the duct shall be determined from the following formula, based on an air velocity of 275 m/min (900 fpm):

A=

0.493 × HO T2 − T1

where A HO T1 T2 0.493

= = = = =

2

the cross-sectional area of the duct in cm rated output capacity in W the inlet-air temperature to the appliance, °C the outlet-air temperature from the appliance, °C factor to yield the cross-sectional area of the duct in cm2

or

A=

0.146 × HO T2 − T1

where A HO T1 T2 0.146

= = = = =

the cross-sectional area of the duct in square inches rated output capacity in Btu/h the inlet-air temperature to the appliance, °F the outlet-air temperature from the appliance, °F factor to yield the cross-sectional area of the duct in square inches

Figure 3 (Concluded)

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X

X

X

2X

Thermocouple

Rectangular duct

Round duct

Five thermocouples minimum permissible

X

X

X

X

X

X

Y

Y

Y

Example of thermocouple placement for more accurate temperature determination in larger ducts

Figure 4 Cross-section of duct showing outlet-air thermocouple placement (See Clauses 11.2, 11.3.5, and 11.3.6 and Figures 1–3.)

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Thermocouple junction to be located on the midpoint of the axis

65 mm (2 1/2 in) Open-ended bright metal shield

100 mm (4 in)

Details of thermocouple and shield for room temperature determination

Figure 5(a) Thermocouple for room air-temperature measurement (See Clauses 11.2 and 12.3.6.)

Direction of radiation

Thermocouple leads

Thermocouple shield of bright metal 50 mm (2 in)

12 mm (1/2 in) radius Thermocouple junction

Hollow tube of porcelain or similar heat-insulating material

Edge of duct

Suggested design of a suitable shield for air-temperature measurement

Figure 5(b) Design of a suitable shield for air-temperature measurement (See Clause 11.2.)

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Locate at midpoint Thermocouple leads

Bulb-type element

Strap

Location of thermocouple on a bulb-type sensing element

Figure 5(c) Location of thermocouple on a bulb-type sensing element (See Clause 11.2.)

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Rear wall panel Side wall panel

2.4 m (8 ft)

300 mm (12 in) 450 mm (18 in) 2.4 m (8 ft) 1500 mm (60 in)

Side wall panel

Floor panel (if combustible)

Room temperature measurement location

2.4 m (8 ft) Notes: (1) All inside panel faces and the floor shall be painted dull (matte) black. (2) A partial ceiling may be constructed inside the enclosure located above the plenum and ductwork and using the duct clearances specified in the manufacturer’s installation instructions. (3) See also Figure 1 for a furnace located within a standard enclosure.

Figure 6 Standard enclosure for floor-mounted appliances (See Clauses 7.6.2.2.1, 7.6.2.2.3, and 12.2.)

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Enclosure top panel

U

Outlet-air duct

Unit

T

Inlet-air duct

X

Enclosure side panels

1.2 m (4 ft) min. Z

Y Enclosure bottom panel Notes: (1) Clearances U, X, Y, and Z shall be specified in the manufacturer’s installation instructions, where U = the clearance from the outlet-air duct to the enclosure top panel; X = the clearance from the rear of the unit to the enclosure rear panel; Y = the clearance from one side of the unit to the enclosure side panel; and Z = the clearance from the other side of the unit to the other enclosure side panel. (2) T is the location of the thermocouple for the inlet-air and room ambient temperature. See Clauses 11.3 and 12.3. (3) The front of the unit shall be at least 1.2 m (4 ft) from the open front of the enclosure.

Figure 7 Alcove-type enclosure for floor-mounted appliances (See Clause 7.6.2.3.1, 7.6.2.3.2, and 12.2.)

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Enclosure rear panel

Enclosure top panel

230 mm (9 in) min.

Enclosure side panels

150 mm (6 in)

Upper air-vent opening

1/2 W Flue pipe 230 mm (9 in)

W

2.3 m (7 ft 6 in) maximum

Enclosure front panel

W Lower air-vent opening

1/2 W 150 mm (6 in)

T

Enclosure bottom (floor) panel

Notes: (1) Ducts are not shown. (2) For vent area openings, see Clause 7.6.2.4.2. The depth of each opening shall be one-half of the width (1/2 W). (3) T is the location of the shielded thermocouple for room ambient temperature. See Clause 12.3.

Figure 8 Closet-type enclosure for floor-mounted appliances (See Clauses 7.6.2.4.1, 7.6.2.4.2, 12.2, and 12.3.14.)

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Enclosure sides

Enclosure back

Z

Y X Air outlet

Flue pipe

W 230 mm (9 in) min. Enclosure front Enclosure top

Plan view (enclosure top panel removed)

Insulating thimble (see Figure 14)

U Plenum

230 mm (9 in) min.

Furnace unit

Air inlet

Enclosure floor

Front view (enclosure front panel removed) Notes: (1) Clearances U, W, X, Y, and Z shall be specified in the manufacturer’s installation instructions. (2) The front view and clearances U, X, Y, and Z are also representative of an alcove-type installation.

Figure 9 Floor-mounted unit in closet-type enclosure (See Clauses 7.6.2.4.1 and 12.2.)

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Enclosure panels Enclosure top Insulating thimble

150 mm (6 in)

C

1/2 W Flue pipe D

Upper vent opening

Inlet-air duct

Outlet-air duct for furnaces with outlet-air opening above the floor

A

Unit base mounting as recommended in manufacturer’s instructions

B Downflow furnace unit

Lower vent opening 1/2 W 150 mm (6 in)

F Normal outlet-air duct location G

Furnace floor level

E Plenum

Notes: (1) For vent opening areas, see Clause 7.6.2.4.2. The depth of each opening shall be one-half of the width (1/2 W). (2) Dimensions A through G and W shall be specified in the manufacturer’s installation instructions. (3) Dimensions C and D shall not be less than 230 mm (9 in).

Figure 10 Downflow furnace in closet-type enclosure (See Clauses 7.6.2.5.1, 12.2, and 12.3.14.)

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Enclosure top panel Enclosure side panel Z

X Inlet-air duct

Y

Front of unit Outlet-air duct W mm (in) 900 mm (36 in) Enclosure rear panel

900 mm (36 in)

Enclosure bottom panel

Notes: (1) Clearances W, X, Y, and Z shall be specified in the manufacturer’s installation instructions, where W = the clearance from the bottom of the unit to the enclosure bottom panel; X = the clearance from the top of the unit to the enclosure top panel; Y = the clearance from the plenum or duct to the enclosure side panel; and Z = the clearance from the rear of the unit to the enclosure rear panel. (2) The 900 mm (36 in) dimension as shown is specified in Clause 7.6.2.6.2. Clearance of a vent connector (flue pipe) to the enclosure panel shall not be less than 230 mm (9 in). (3) The outlet-air and inlet-air ducts shall extend to the outside of the enclosure.

Figure 11 Standard enclosure for horizontal furnaces (See Clauses 7.6.2.6.1, 7.6.2.6.2, 7.6.2.7, and 12.2 and Figure 12.)

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Enclosure side panels Enclosure top panel Upper air vent opening Enclosure rear panel

W/2 W W/2

Inlet-air duct

Enclosure front panel Enclosure bottom panel

Lower air vent opening

Outlet-air duct

Notes: (1) The vent area = W × 1/2 W. See Clause 7.6.2.4.2. (2) See also Figure 11.

Figure 12 Closet-type enclosure for horizontal furnaces (See Clauses 7.6.2.7, 12.2, and 12.3.14.)

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Arrangement 1

Flue pipe

C B

D Inlet air A

T1

E

E Outlet air

Inlet air

T2

E Unit Air movement

T1

Outlet air

T2

F

H mm (in)

Insulating thimble

Arrangement 2 Flue pipe E

E

Inletand

Outlet air T2

T2 T1 outlet-air plane

Unit Air movement

Inlet air T1

H mm (in)

Arrangement 3

Flue pipe G

E E Inlet air T1

Outlet air T2

Inlet air T1

Unit Air movement

T2

Outlet air

H mm (in) Notes: (1) Dimensions A through H shall be specified in the manufacturer’s installation instructions. (2) Dimension C and D shall not be less than 230 mm (9 in). (3) Dimension E shall be 900 mm (36 in). This dimension is the requirement specified in Clause 7.4.2.5, unless the unit is to be installed in a closet. (4) T1 is the inlet-air temperature and T2 is the outlet-air temperature.

Figure 13 Duct and thermocouple locations for horizontal furnaces and typical placement of such appliances in standard enclosures (See Clauses 7.6.2.6.1, 7.6.2.7, and 12.2.)

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Oil-fired warm air furnaces

Flue pipe

Asbestos paper or millboard

230 mm (9 in) min.

230 mm (9 in) min. Enclosure wall

Figure 14 Sealing of an annulus around a vent pipe (See Clause 12.2 and 12.3.12 and Figure 9.)

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Top enclosure panel 150 mm (6 in)

Front of unit heater 450 mm (18 in)

Side enclosure panel Side of unit heater

450 mm (18 in)

Side enclosure panel Bottom enclosure panel

300 mm (12 in)

900 mm (36 in)

Front view

900 mm (36 in)

Side view

Figure 15 Standard enclosure for unit heaters (See Clause 7.6.2.8 and 12.2.)

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Annex A (informative) Marking translations Note: This Annex is not a mandatory part of this Standard.

English

French

5.1.2(m) Refer to the additional marking located on the fan door of the appliance

Se référer au marquage supplémentaire sur la porte du ventilateur de l’appareil

5.1.2(m)(ix) When an intermediate external static pressure is required, the components specified for the next larger static pressure shall be used and adjusted for the rated temperature rise

Lorsqu’une pression statique externe intermédiaire est requise, les éléments constitutifs spécifiés pour la pression statique supérieure suivante doivent être utilisés et réglés pour la hausse nominale de température

5.1.2(n) REGULAR CLEANING OF THIS APPLIANCE IS REQUIRED. SEE SERVICE MANUAL

LE NETTOYAGE RÉGULIER DE CET APPAREIL EST REQUIS. VOIR LE MANUEL D’ENTRETIEN

5.1.2(o) DO NOT USE THIS FURNACE WITHOUT DUCTS

NE PAS UTILISER CETTE FOURNAISE SANS GAINES

5.1.2(p) CERTIFIED FOR USE WITH TYPE L VENT

CERTIFIÉ POUR UTILISATION AVEC ÉVENT DE TYPE L

5.1.2(q) DO NOT USE WITH DUCTS OTHER THAN FITTINGS APPROVED WITH THE UNIT

NE PAS EMPLOYER AVEC DES GAINES AUTRES QUE LES RACCORDS APPROUVÉS AVEC L’UNITÉ

5.3.1(a) FOR USE ONLY WITH (specify manufacturer or type identification of burner)

POUR UTILISATION UNIQUEMENT AVEC (spécifier l’identification du fabricant ou du type de brûleur)

5.3.1(b) OIL BURNER MODEL (specify model or type number of specific type of burner)

MODÈLE DE BRÛLEUR À L’HUILE (spécifier le numéro de modèle ou le type spécifique de brûleur)

5.4.1(a) FOR USE ONLY WITH (specify manufacturer or type of blower motor)

POUR UTILISATION UNIQUEMENT AVEC (spécifier l’identification du fabricant ou du type de moteur du souffleur)

5.4.1(b) BLOWER MOTOR MODEL (specify model or type number of blower)

MODÈLE DE MOTEUR DE SOUFFLEUR (spécifier le numéro de modèle ou le type du souffleur)

5.1.4(c) FRAME (specify frame type or classification of blower motor)

BÂTI (spécifier le type ou la classification du bâti de moteur du souffleur)

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5.1.4(d) RATED AT (specify horsepower or ampere rating of blower motor) 6.2(a) THE INSTALLATION OF THE APPLIANCE SHALL BE IN ACCORDANCE WITH THE REGULATIONS OF THE AUTHORITES HAVING JURISDICTION 6.2(i)(i) OIL-FIRED APPLIANCES SHALL BE CONNECTED TO VENTS HAVING SUFFICIENT DRAFT AT ALL TIMES TO ENSURE SAFE AND PROPER OPERATION OF THE APPLIANCE

© Canadian Standards Association

PUISSANCE NOMINALE (spécifier la force évaluée du moteur de souffleur en horse-power ou en ampères) L’INSTALLATION DE L’APPAREIL DOIT ÊTRE CONFORME AUX RÈGLEMENTS DES AUTORITÉS COMPÉTENTES LES APPAREILS ALIMENTÉS À L’HUILE DOIVENT ÊTRE RACCORDÉS À DES TUYAUX DE CHEMINÉE AYANT, EN TOUT TEMPS, UN TIRAGE SUFFISANT POUR ASSURER UN FUNCTIONNEMENT CORRECT ET SÛR DE L’APPAREIL

6.3(a) SAVE THESE INSTRUCTIONS FOR REFERENCE

CONSERVER CES INSTRUCTIONS POUR S’Y RÉFÉRER

6.3(d) DO NOT USE GASOLINE, CRANKCASE OIL, OR ANY OIL CONTAINING GASOLINE

NE PAS UTILISER D’ESSENCE, D’HUILE DE CARTER, NI AUCUNE HUILE CONTENANT DE L’ESSENCE

6.3(f) ALWAYS KEEP THE OIL SUPPLY VALVE SHUT OFF IF THE BURNER IS SHUT DOWN FOR AN EXTENDED PERIOD OF TIME

GARDER TOUJOURS LE ROBINET D’ALIMENTATION DE L’HUILE FERMÉ SI LE BRÛLEUR EST ARRÊTÉ POUR UNE PÉRIODE PROLONGÉE

6.3(i) DO NOT START THE BURNER UNLESS THE BLOWER ACCESS DOOR IS SECURED IN PLACE 6.3(m) NEVER BURN GARBAGE OR PAPER IN THE HEATING SYSTEM, AND NEVER LEAVE PAPER OR RAGS AROUND THE APPLIANCE 6.4(g) DO NOT ATTEMPT TO START THE BURNER WHEN EXCESS OIL HAS ACCUMULATED, WHEN THE FURNACE IS FULL OF VAPOUR, OR WHEN THE COMBUSTION CHAMBER IS VERY HOT

NE PAS DÉMARRER LE BRÛLEUR SANS QUE LA PORTE D’ACCÈS AU SOUFFLEUR NE SOIT FIXÉE EN PLACE NE JAMAIS BRÛLER DES DÉTRITUS OU DU PAPIER DANS LE SYSTÈME DE CHAUFFAGE NI LAISSER DU PAPIER OU DES CHIFFONS AUTOUR DE L’APPAREIL NE PAS ESSAYER DE DÉMARRER LE BRÛLEUR LORSQU’UN EXCÈS D’HUILE S’EST ACCUMULÉ, LORSQUE LA FOURNAISE EST PLEINE DE VAPEURS, NI LORSQUE LA CHAMBRE DE COMBUSTION EST TRÈS CHAUDE

6.3(h) DO NOT TAMPER WITH THE APPLIANCE OR CONTROLS — CALL YOUR SERVICE PERSONNEL

NE TOUCHER NI À L’APPAREIL NI AUX DISPOSITIFS DE CONTRÔLE — APPELER LE DÉPANNEUR

10.4.1.2(c) Heating Appliance

Appareil de chauffage

Combination Heating and Cooling Appliance

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Appareil combiné de chauffage et de refroidissement

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10.4.2.1 FOR OUTDOOR INSTALLATION ONLY FOR INDOOR OR OUTDOOR INSTALLATION

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Oil-fired warm air furnaces

UNIQUEMENT POUR INSTALLATION À L’EXTÉRIEUR POUR INSTALLATION À L’INTÉRIEUR OU À L’EXTÉRIEUR

63

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Proposal for change

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ISBN 1-55397-515-4