CSA B140.1-1966 - Vapourizing-type oil burners (reaffirmed 2015)

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B140.1-1966

(reaffirmed 2015)

Vapourizing-type oil burners

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CSA Standards Update Service B140.1-1966 March 1966 Title: Vapourizing-type oil burners Pagination: 15 pages To register for e-mail notification about any updates to this publication •

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CSA STANDARD B140.1-1966

VAPOURIZINC-TYPE 011 BURNERS

PUBUSWED, MARCH. 1966 BY THE CANADIAN STANDARDS ASSOClATlOM (INCORPORATED 1919)

CSA CERTIFICATION -1Certification service covering products complying with the requirements of this Standard is av9Jable. For details direct your enquiry to:

STANDARDS Address all orders for CSA Standards to:

-4 complimentary copy of the complete list of .CSA;-.-publications wi11 be provided on request.

3

VAPOURIZING-TYPE OIL BURNRRS

CONTENTS Page

List of Members of Committee on Oil Burning Equipment . . . . . . . . . . .

4

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 5

Reference Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

STANDARD I . Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7

2 . Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7

3. General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2 Threads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3 Electrical Features . . ...................................... 4 . Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2 Antiflooding Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3 Control of Flow Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4 Fuel Filters OH Strainers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5. Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1 Complete Factory Assembled Oil Burning Appliances . . . . . . . . . 5.2 Factory Assembled Burner Assemblies ....................... 5.3 Conversion Burner Assemblies ..............................

8 8 8 9

IO 10 10 10 10

6. Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 6.1 Complete Factory Assembled Oil Burning Appliances . . . . . . . . . 10 6.2 Factory Assembled Burner Assemblies ....................... 10 6.3 Conversion Burner Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 6.3.1 General ............................................ 11 6.3.2 Installation Instructions .. . . . . . . . . . . . . . . . . . . . . . . . . . . 11 6.3-3 Service and Maintenance Instructions .................. 12 6.3.4 Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7. Tests, Normal Operation ...................................... 13 7.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 7.2 Combustion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.3 Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13 14

8. Tests. Abnormal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1 Flooding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.2 Seepage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3 Flooded Burner Burn-Off .................................. 8.4 Abnormal Voltage and Cold Fuel ........................... 8.5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14

14 15 15

15 15

4

CSA STANDARD B140.1

COMMITTEE ON OIL BURNING EQUIPMENT D. M. DYMOWD (Acting Chairman)......... CSA Testing Laboratories, Rexdale W. J. CARSON.. ........................ .Saskatchewan Department of Labour, Regina E. T. COLES............................. Penn Controls Limited, Scarborough Canadian General Electric Company Limited, K. R. D U N P .. ~ :.. ...................... Toronto (Reflresenting Canadian Electrical Manufacturers Association) A. D. KENT.. .......................... .National Research Councii, Ottawa H. G. LATAM ........................... .Conroy Manufacturing Co. Limited, St. Catharines L. E. LAWGHEAD.. ...................... .Terry Burners Inc., Toronto (Representing ql ‘Heating Association) C. MIALL............................... The Hydro-Electric Power Commission of Ontario, Toronto J. F. MITCHELL.. ......................... McArthur-Mackinnon Limited, Rexdale (Representing National Warm Air Heating and Air Conditioning Manufacturers’ Association) W. P. WEST ............................ .General Accident Assurance Co. of Canada, Toronto G, R. WOOLPREY.. ...................... .Manufacturers Mutual Fire Insurance Company, West mount

In addition to b?ze members of the Committee, the following made valuable contribution to the &velopmeni of this Stundard in t h i r capacities as nobed: k. C. KIMBALL (Associabe Member) ........Mupp Corporation, Waynesboro, Georgia H. B. LUT;IE(AZtermte Member). ......... .The Hydro-Electric Power Commission of Ontario, Toronto

D. OLDS(Alternate Member) ..............Seigler Heater Company, Centralia, Illinois M. J. REED(Associate Member). ......... .National Oil Fuel Institute Inc., New York *A. MAUGENEST (Subcommittee Chairman)...Controls Company of Canada Ltd., CooksvilIe D1 T.MEWSON (Subcummiltee Member). ....CSA Testing Laboratories, Rexdale I?. E. KENT(Subcommittee Member) ........CSA Testing Laboratories, Rexdale €3. C. Q ~ N (Subcommittee N Member). ......Department of National Defence, Ottawa E. C. ROBINSON (Subcommittee Member). . , .Dickinsons Ltd., Vancouver F. TAYLOR (Subcommittee Member). .......Franklin Mfg. Co. (Canada) Ltd.,GueIph T.TYNE(Subcommittee Member). .........CSA Testing Laboratories, Rexdale *Retired

VAPOURIZING-TYPE

Om

BURNERS

5

PREFACE This is the first edition of one of a series of Standards covering minimum requirements for safe operation, acceptable performance, design, construction, manufacture, marking, and testing of oil burning equipment. Xothing in these requirements is t o be considered in any way as indicating a measure of quality beyond compliance with the provisions they contain.

Safe and satisfactory operation of oil burning equipment depends t o a great extent upon its proper installation. To assure satisfactory and safe operation, equipment complying with the requirements of this Standard should be installed in accordance with the latest issue of CS-4 Standard B 139, Installation Code for Oil Burning Equipment. Appendices and footnotes appearing in CSA Standards are not considered part of the requirements of the Standards but are included to facilitate their use.

This Standard was prepared by the Committee on OiI Burning Equipment under the jurisdiction of the Sectional Committee on Oil Burning Equipment and was formally approved by these Committees and the CSA Technical Council.

OTTAWA, MARCH,1966

NOTE: In order to keep abreust of progress in the industries concerned, CSA fiubiications are subjed to periodic review. Su gestians for improvement will be welcomed ut all times. They will be recorch and in due course brought to the attention of the appropriate Committee for consideradian. Also, requests for interpretdon wilE be accepted 6y the Committee. They should be worded in such a m n w as to permit a simple “yes” or “no’) answer based on the literal text of tbc requirement concerwd.

A11 enquiries regarding this S&ndard should be addressed h Cansdim Stmdardr Associatbp 178 Rexdale Etoulevard, Rexdak ( T h n t o ) - ,Dmrio,

REFERENCE FIJBLICATIONS This Standard makes reference t o the following Standards: CSA Standards I31.1-1949 - Unified and American Screw Threads; B139-1962 - Installation Code for Oil Burning Equipment; B140.Ck1963 - Definitions and General Requirements for Oil Burning E uipment; C22.1-1966 - Zanadian Electrical Code, Part I C22.2 (Series} - Canadian Electrical Code, Part 11; C22.2 No. 3-1961 - Electrical Features of Fuel-Burning Equipment (Gas and Oil) American Standard (ASA) B2.l-1960, Pipe Threads (Except Dryseal).

hA9w 1R3

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7 NOTE: The Association desires to call atkntion to the fact thut this Stundard is intended to include only the technical provisions necessary for the supply of the article herein referred to, und is not intended to include normel contractual requirements. ,

Bl40.1-1966

VAPOURIZING-TYPE OIL BURNER$ 1. SCOPE 1.l This Standard applies to oil burning assemblies comprising a vapourizing burner and such devices as may be required to control the supply of fuel to the burner.

1.2 This Standard applies only to oil burner assemblies intended for use with either kerosene, No. 1 or No. 2 fuel oil as classified in CSA Standard B 140.0. 1.3 This Standard applies to oil burner assemblies which may be installed in vented heating or cooking appliances. 1.4 This Standard applies t o burner assemblies with a fuel input rate of one Canadian gallon per hour or less.

1.5 The requirements given herein apply to burner assemblies when installed in accordance with the instructions supplied by the manufacturer.

1.6 Burner assemblies having a burning rate greater than one Canadian gallon per hour, may be examined and tested in accordance with the intent of these requirements. 2. DEFINITIONS 2.1 The following definitions apply in this Standard: Burner means t h a t portion of the oil burner assembly within which the fuel is vapourized and mixed with the combustion air; Burner assembly means a unit comprising a vapourizing burner and such devices as m a y be required to control the supply of fuel to the burner; CG means cubic centimetre; Manufacturer means the manufacturer responsible for the complete oil burner assembly but does not necessarily manufacture t h e components thereof;

Operating level For a float operated antiflooding device means the level attained in the fuel chamber of the device under a fixed supply head and with the metering valve set to a flow rate of not less than 3, or more than 6 cc per minute; For a barometric tank and sump antiflooding device means the level attained in the sump with the fuel in barometric tank at room temperature and with the metering valve set to a flow rate of not less than 3, or more than 6 cc per minute; Vapourizing type oil burner means an oil burner in which the fuel oil is vapourized from a film of fuel oil on a surface of the burner by the heat of the burner flame.

8

CSA STANDARD 3140.1

3. GENERAL REQUIREMENTS 3.6 General 3.1.1 The equipment shall meet the general provisions of CSA Standard B 140.0-1963, Definitions and General Requirements for Oil Burning Equipment, applicable to all oil burning equipment. Other references herein t~ that Standard are abbreviated to CSA Standard B 140.0. 3.8.2 Where a definition or requirement as given in this Standard appears to differ, from the definition or requirement as given in any of the publications referred to in this Standard, the definitions or requirement as given in this Standard shall govern.

3.2 Threads 32.1 Pipe Threads. All pipe threads shall be in accordance with American Standard B2.l-1960, Pipe Threads (Except Dryseal), for tapered pipe threads. 3.2.2 Screw Threads. Screws and screw holes used for mounting components or parts which may be removed for servicing, shall be. threaded in accordance with CSA Standard B1.1-1949, Unified and American Screw Threads.

3.3 Electrical Features. Electrical. features, where incorporated as part of the oiI burner assembly, shall meet the applicable requirements of t h e CSA C22.2 Series of Standards (Canadian Electrical Code, Part 11) and in particular CSA Standard C22.2 No. 3-1961, Electrical Features of FuelBurning Equipment (Gas and Oil).

4.1 General

4.1.1 The design and construction of the assembly, parts or components shall be in accordance with accepted concepts of safety, substantiality, durability, interchangeability, and workmanship. 4.9.2 Burner assemblies shall be designed to provide reasonable accessibility to components which require periodical servicing and/or adjustment. 4.1.3 Burner assemblies, intended for field installation, shall include suitable means for the adjustment, support, and attachment of components in accordance with the instructions supplied by the manufacturer. 4.1.4 I t shall be possible to restore a component which has been removed for servicing to its proper place in relation to other components of the assembly without the necessity of realignment. 4.1.5 Burner assemblies designed for manual ignition shall be provided, where necessary, with a suitable torch. 4.2 Antiflooding Devices 4.2.1 General. Each oil burner assembly shall be equipped with a n antiflooding device, which, when mounted in accordance. with the manufacturer's instructions, shall limit the level of the fuel in the burning unit to a safe maximum as determined by tests specified in Clauses 7 and 8. NOTE:Where the relationship of the antiflooding device and the burning unit is fixed by the manufacturer, instructions with regard to this relationship may be omitted.

VAPOURIZING-TYPE OIL BURNERS

9

4.2.2 Float Controlled Devices 4.2.2.1 A float controlled device shall operate at any supply head from the minimum specified by the control manufacturer to a maximum of 3.5 psi. 4.2.2.2 A secondary device shall be incorporated in a float controlled device, which, in case of failure of the primary float controlled device to maintain the fuel level below a safe limit, shall actuate a mechanism to apply additional force t o s h u t off the fuel supply. 4.2.2.3 The secondary device shall prevent the fuel level from increasing more than 5/is inch above t h e operating level attained with the minimum supply head specified by t h e manufacturer. This increased level shall be not less than % inch below the lowest point which would permit overflow from the device. 42.2.4 The nominal operating level of the fuel shall be marked on the outside of the device. 42.2.5 I t shall be possible to readily ascertain the direction of fuel flow through the device. 48.2.2.6 A part in contact with the fuel, when installed in its proper relationship to other parts of the device shall be of a corrosion resistant material or shall be suitably protected to resist corrosion. 4 2 2 . 7 Parts, by means of which final adjustment of the maximum flow rate is obtained at the factory, shall be designed and/or located to discourage tampering. 42.2.8 A fuel filter or strainer shall be provided OR t h e inlet side of the device.

4.2.3 Barometric CssntsolPed Devices 4.2.3A The fuel level in the sump of a barometric device shall

not change more than 5/i’s of a n inch when tested in accordance with Clause inch below the 8.1.4 and Clause 8.1.5. The level shall always be more than lowest point which would permit overflow from the sump. 4.2.3.2 Means shall be provided to secure the sump in the correct relationship to the burner.

4.3 Control of Flow Rate L3.P -4 burner assembly shall incorporate a device which restricts the flow rate of fuel to the burner unit to a rate not in excess of the maximum which can be safely consumed as determined by tests specified in Clauses 7 and 8. 4 . 3 2 A device which permits adjustment of the flow rate may be used provided that, when it is adjusted t o the limit permanently set by the manufacturer, the flow rate shall not exceed the maximum flow rate which can be safely consumed. 4.3.3 The device which controls the flow rate shall be mounted on or incorporated in a rigid member of the assembly. YOTE:Support of the device by the fuel Line alone is not cunsidered as meeting this requirement.

4.3.4 Where the device incorporates a restricting orifice, a fuel filter or strainer shall be provided upstream from this orifice. NOTE: The strainer or fuel$lter required by Clause 4.2.2.8 may be considered t o provide the protection required by this Clause.

10

CSA STANDARD B140.1

4.3.5 For a conversion unit intended for installation in a residential cooking appliance, the maximum flow rate shall not exceed 30 cc per minute.

4.4 Fuel Filters or Strainers 4.4.1 The largest opening of a fuel strainer element shall be of such a size t h a t its larger dimension shall be not greater than 90 per cent of the smaller dimension of the smallest fixed opening protected by the strainer. A fuel filter shall provide equivalent protection. 4.4.2 The free area of a strainer shall be not less than 1 square inch for kerosene or No. 1 fuel oil and not less than 2 square inches for No. 2 fuel oil. A fuel filter shall provide equivalent flow.

5. MARKING 5.1 Complete Factory Assembled Oil Burning Appliances. Where the burner assembly is factory installed in an appliance, the burner assembly need not bear any markings.

5.2 Factory Assembled Burner Assemblies. Where the components of a burner assembly are factory incorporated into a rigid assembly intended for installation in an appliance to convert it to a n oil burning appliance, the burner assembly shall bear permanent marking located where i t will be visible after installation in the appliance and giving the following details: (a) Manufacturer’s name, tradename, or other recognized symbol of identification ; (b) Model or type designation of the burner assembly; (c) Range of firing rates and grade of fuel; (d) Where electrical features are incorporated, the electrical rating as specified by CSA Standard C22.2 No. 3-1961, Electrical Features of Fuel-Burning Equipment (Gas and Oil). 5.3 Conversion Burner Assemblies. Where a burner assembly, intended to convert an appliance to an oil burning appliance, is supplied as a packaged burner assembly comprising, as separate parts, all the necessary components required to field install these parts as a burner assembly in conjunction with the appliance, a metaI nameplate bearing the details required by Clause 5.2 shall be supplied as part of the assembly. This nameplate shall bear a tag or other means of marking requiring that the nameplate be permanently attached to the converted appliance in a location where i t shall be readily visible after installation of the burner assembly.

6 . INSTRUCTIONS 6.1 Complete Factory Assembled Oil Burning Appliances. Where the burner assembly is factory installed as part of a n appliance, the instructions shall include such items as listed in Clause 6.3 as are necessary for the proper servicing and operation of t h e burner assembly.

6.2 Factory Assembled Burner Assemblies. Where the components of a burner assembly are factory incorporated into a rigid assembly intended for installation in an appliance to convert i t to an oil burning appliance,

installation, service, and operating instructions shall be supplied for the burner assembly and shall include such items as listed in Clause 6.3 as are necessary for the proper installation, servicing and operation of the burner assernb I y .

VAPOURIZING-TYPE OIL BURNERS

11

6.3 Conversion Burner Assemblies 6.3.1 General 6.3.1.1 Where a burner assembly, intended to convert a n appIiance to an oil burning appliance, is supplied as a packaged burner assembly comprising, as separate parts, all the necessary components required to field install these parts as a burner assembly in conjunction with the appliance, then installation, service, and operating instructions shall be supplied as part of the packaged assembly.

6.3.1.2 Each of these instructions shall include the following identifying information : (a) Manufacturer’s name, trademark, or other recognized identification ; (b) Model or type designation of the burner assembly; ( c ) h n g e of firing rates; (d) Grade of fuel. 4.3.1.3 The installation, service, and operating instructions may each be separate sets of instructions or two or more of these sets of instructions may be combined into one set.

6.3.2 Installation Instructions. The installation instructions shdE include the following information where applicable : (a) A complete list of all sub-assemblies or components; (b) That the installation shall be in accordance with the regulations of authorities having jurisdiction ; NOTE:Reference s3touEd be made to CSA Standard 23139-1962, Installation C o & f w Q-iJ Burning Equipment.

( c ) T h e approximate dimensions of the combustion chamber in which the burner is to be installed; {d) The suggested location of the burner in the combustion chamber; {e) Data for proper installation of all sub-assemblies and components; NOTE: Cross-sectional drawings andlor illustrative descriptions of step-by-step metho& for installing the eqzciFent.

(f) The elevation of the operating fuel level in t h e antiflooding device

with respect to the burner base; (9) A wiring diagram for the electrical equipment;

Nom: All wiring shal2 be done in accordame. with CSA Standard C22.1-1966, Canadikw Elect~kalCode, Part I.

(h) Data with regard to the installation of the fuel tank including the minimum clearance between the fuel tank and the appliance and a warning not to install a barometric fuel tank where it will be in the direct rays of the sun or adjacent to a source of intense heat; (i> Information with respect to suitable chimneys, size, height, lining, condition, etc. ; (j) The recommended draft; (k) Instructions for installation of a draft regulator when required; (1) Instructions for installation of the flue pipe including minimum clearance to combustible material ;

12

CSA STANDARD B140.1.

(m) Information relative to the supply of air for satisfactory combustion, into the room in which the equipment is located; (n) Instructions to permanently fasten the nameplate, enclosed in the package, to the appliance in which the burner assembly is enclosed.

6.3.3 Service and Maintenance Instructions.The service and maintenance instructions shall include the following information where applicable : (a) An indicated space for the name, address, and telephone number of the serviceman ; (b) Information with respect to the general maintenance and care to be given the burner assembly ; ( c ) Instructions to be followed in cleaning t h e fuel strainer or filter; (d) Information relative to checking the installation ; (e) Recommendations for cleaning and replacing the flue pipe; (f) Information regarding adjusting and operating electrical controls ; (9) Instructions for adjusting the draft regulator if one is supplied; (h) The appearance of the flame (and burner sleeves for sleeve type burners) for proper combustion, at high and low fire; (i) Instructions for the removal of excess oil from the burner when such has accumulated, 6.3.4 Operating Instructions. The operating instructions shaIl include the following information where applicable:

A caution to read and save these instructions for reference; Method of lighting the burner; Method of adjusting the fuel and air supply to obtain proper cornbustion; The recommended draft; The appearance of the flame (and sleeves where applicable) at high and low fire for proper combustion; Instructions for adjusting the draft regulator if one is supplied ; Instructions for shutting off the burner; Instructions for restarting the burner after shut-off; The following cautions or equivalent: “DO NOT USE GASOLINE, CRANKCASE DRAININGS, OR OIL CONTAINING GASOLINE”; “DO NOT ATTEMPT TO LIGHT A HOT BURNER”; “DO NOT ATTEMPT TO START THE BURNER WHEN EXCESS OIL HAS ACCUMULATED”; “KEEP THE FUEL VALVE NEAREST T O THE SUPPLY TANK SHUT OFF WHEN THE BURSER IS SHUT OFF FOR EXTENDED PERIODS”; “ALWAYS ALLOW THE FUEL IX h BAROMETRIC FUEL TANK T O REACH ROOM TEMPERATURE BEFORE PLACING THE TANK I N THE SU3qP”; “DO NOT TA4MPER WITH CONTROLS, CALL YOUR SERVICEM ,AN ’’.

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VAPOURIZING-TYPE OIL BURNERS

(j) An indicated space for the name, address, and telephone number of

the serviceman.

7. TESTS, NORMAL OPERATION 9.1 General 7,P.l The burner assembly shall perform safely when installed and operating in accordance with the instructions supplied by the manufacturer.

7.1.2 The operation of the burner assembly or any component thereof shall not be hazardous to life or property, when tested under such abnormal conditions as are likely to occur in service. '7.1.3 The instrumentation and methods of testing shall be in accordance with the procedures in CSA Standard €3140.0. 7.1.4 If defects begin to become evident, additional tests shall be performed to determine whether such defects would result in unsafe conditions in normal operation.

7.1.5 The burner assembly shall be installed in accordance with the manufacturer's instructions in a suitabk test appliance of a size commensurate with the firing rate.

7 L 6 If the burner assembly is intended for installation in a specific appliance it shall be tested in that appliance.

7.1.7 The heating surfaces of the appIiance and vent pipe shall be clean and free from soot and dust at the beginning of the test. 7.1.8 For test purposes the voltage to be used shall be as listed in Table 1 and unless otherwise stated shall be rated voltage.

TABLE 1 VOLTAGES

I Nominal

110-120

220-240 440-480 550-600

Rated

Test Voltage Per Cent of Rated

120

240 480

600

NOTE:For other nominal voltages the rated voltage shlE

75

I10

90 I 80 360 450

264 528

be the same as the

132

660 nominal voltage.

7*2 Combustion 7.2.1 Requirements 7.2. l m I Combustion shaII be stable and complete at all firing rates in the operating range of the burner under normal operating conditions. 7.2.1.2 The density of the smoke in the flue gases shall not exceed that corresponding to a No. 7 Shell-Bacharach smoke-spot, at any firing rate at which the burner can be operated.

14

CSA SI'ANDARD B140.1

7',2.2 Procedures

7.2.2.1 The firing rate shall be adjusted to that specified by the manufacturer, plus or minus 2 per cent, using the heaviest grade* of fuel oil recommended by the manufacturer. *As clussifid in CSA Standard B140.0.

7.2.2.2 Where applicable, the combustion air supply shall be adjusted t o establish the air-f uel ratio recommended by the manufacturer. NOTE:For the purpose of these tests, the per cent of carbon dioxide in tizeflue gases may be specifid and used in esfablishing the air-fuel ratio.

7.2283 For natural draft installations the chimney draft shall be the minimum draft recommended by the manufacturer but shall not exceed 0.06-inch water column. 7.2.284 For mechanical draft installations the over fire draft shall be the minimum draft recommended by the manufacturer. 7.2-285 The combustion characteristics shall be determined after steady-state operating conditions have been established as evidenced by consistent values being obtained for three sets of readings taken at 15-minute intervals.

7.3 Ignition. Ignition, if it occurs, shall be safe and reliable under each of the following conditions, where applicable : (a) When ignited in the manner specified by the manufacturer; (b) When ignition is attempted of a flooded burner; (c) When two burners are installed in a common combustion chamber, when one burner is ignited the second is self-ignited from the first burner ; (d) When ignition is attempted under cold conditions, specified in t h e Cold Oil Test; ( e ) When delayed ignition of a hot burner occurs; (f) In addition, when attempting ignition of a burner which is equipped with an electric ignition system in the manner specified: (i) Under all conditions likely to occur during normal operation of the unit; (ii) Delayed ignition, if i t occurs with a hot or cold burner; (iii) Under abnormal voltage conditions, specified in the Abnormal Voltage Test ; (iv) Upon restoration of power following power failure.

8. TESTS, ABNORMAL OPERATION 8.1 Flooding 881-1 For a burner assembly in which the relationship between the antiflooding device and the burner is rigidly fixed a t the factory, fuel shall not be discharged from the burner when the burner assembly is tipped one degree from level and the fuel level in the antiflooding device is increased inch above the operating level when the flow control valve is open.

8.1.2 For a burner assembly in which the relationship between the antiflooding device and the burner is not fixed at the factory,fuel shall not be discharged from the burner when the fuel level in the antiflooding device

VAPOURIZING-TYPE OIL BURNERS

is increased is open.

15

inch above the operating level when the flow control valve

8.1.3 Where the antiflooding device is designed to trip the shut-off valve mechanism when the fuel in burner is at a lower level than operating level in the antiflooding device, then the tripping level shall replace the “operating level” in the tests specified in Clauses 8.1.1 and 8.1.2. 8.1.4 For a burner assembly employing barometric feed from a single tank, fuel shall not be discharged from the burner when, with the regulating valve open, a quantity of fuel equal to 6 per cent of t h e capacity of the fuel tank is added to the amount normally in the sump. 8.1.5 For a burner assembly employing barometric feed from two fuel tanks, the. quantity of fuel to be added, see Clause 8.1.4, shall be equal to 6 per cent of the larger fuel tank multiplied by 1.4.

8.2 Seepage. There shall be no seepage of fuel from the burner assembly when fuel is supplied to the antiff ooding device for a period of 24 hours with t h e metering valve open to its maximum setting.

8.3 Flooded Burner Burn-Off 8.3.1 Requirement. When the fuel in the burner is ignited, and after completion of the burn-off, there shall be no deleterious effects to the materials and components of the burner assembly.

8.3.2 Procedure 8.3.2.1 Without draining any fuel from the burner assembly following the Seepage Test, Clause 8.2, and with the metering valve still open to its maximum setting, and all other components allowed to function normally, the fuel i.n the burner shall be ignited. 8.3.2.2 Where the antiflooding device is a float controlled device, the secondary device shall remain tripped, if i t had tripped during the seepage test, before igniting the fuel in the burner. 8.4 Abnormal Voltage and Cold Fuel. With the fuel and fuel handling components at a temperature of 36F -t- 4F, ignition and operation of the burner shall not be hazardous at any line voltage from 75 to 110 per cent of rated voltage.

8.5 Operation. The burner shall be designed to stop the delivery of fuel or shall continue to operate safely during each of the following abnormal conditions, where applicable : (a) Upon interruption of the combustion air supply, from the rnechanical means where part, or all, of the cornbustion air is supplied by mechanical means; (b) Upon interruption of the power supply where the burner assembly is equipped with electrical features; (c) With the damper closed on a burner assembly using a damper to control the air supply.

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CSA welcomes your suggestions and comments. To submit your proposals for changes to CSA Standards and other CSA publications, please supply the information requested below and attach your proposal for change on a separate page(s). Be sure to include the • Standard/publication number • relevant Clause, Table, and/or Figure number(s) • wording of the proposed change • rationale for the change.

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Association Activities The Canadian Standards Association is a not-for-profit, independent, private sector organization that serves the public, governments, and business as a forum for national consensus in the development of standards, and offers them certification, testing, and related services. It is a membership Association open to any individual, company, or organization interested in standards activities. The more than 1000 standards published by CSA are written, reviewed, and revised by over 7000 committee members, who represent users, producers, and regulatory authorities in all regions of Canada. In addition to these volunteers, some 2000 representatives from industry, labour, governments, and the public participate in the work of the Association through sustaining memberships. Approximately one-third of CSA’s standards have been referenced into law by provincial and federal authorities. Activities in the standards field cover a number of program areas: lifestyles and the environment, e Iec t rica I /e Iect ronics, con st r uctio n, en ergy, t ra ns po rtat io n/d ist ri b ution, m ate ria Is tech no Iogy, business/production management systems, comrnunications/information technology, and welding. These are all listed in our catalogue, which is available on request. We welcome your comments and inquiries. Further information on standards programs may be obtained by writing to

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