1、NATIONAL STANDARD OF CANADA CAN1 - 6.6 -M78 (Reaffirmed 2001) GAS APPLIANCE THERMOSTATS Effective Date - August 1979 This Standard is a revised edition of the former: CGA 6.6-1972 Approved by Standards Council of Canada Published August 1978 Copyright Canadian Gas Association - 1978 THE STANDARDS CO
2、UNCIL OF CANADA The Standards Council of Canada is the co-ordinating body of the National Standards System, a federation of independent, autonomous organizations working towards the further development and improvement of voluntary standardization in the national interest. The principal objects of th
3、e Council are to foster arid promote voluntary standardization as a means of advancing the national economy, benefitting the health, safety and welfare of the public, assisting and protecting the consumer, facilitating domestic and international trade, and furthering international co-operation in th
4、e field of standards. A National Standard of Canada is a standard which has been approved by the Standards Council of Canada and one which reflects a reasonable agreement among the views of a number of capable individuals whose collective interests provide, to the greatest practicable extent, a bala
5、nce of representation of producers, users, consumers and others with relevant interests, as may be appropriate to the subject in hand. It normally is a standard which is capable of making a significant and timely contribution to the national interest. Approval of a Standard as a National Standard of
6、 Canada indicates that a standard conforms to the criteria and procedures established by the Standards Council of Canada. Approval does not refer to the technical content of the standard; this remains the continuing responsibility of the accredited standards-writing organization. Those who have a ne
7、ed to appty standards are encouraged to use National Standards of Canada whenever practicable. These standards are subject to periodic review; therefore, users are cautioned to obtain the latest edition from the organization preparing the standard. The responsibility for approving National Standards
8、 of Caiada rests with the Standards Council of Canada 45 OConnor Street, Suite 1200, OlTAWA, Ontario. CANADA KIP 6N7 THE CANADIAN GAS ASSOCIATION The Canadian Gas Association, which represents all segments of the natural gas industry, has been accredited by the Standards Council of Canada to prepare
9、 National Standards of Canada in the area of equipment for use with natural gas and propane. CGA, founded in 1907, represents distributors, transmission companies, producers, pipeline contractors, manufacturers, and allied servicB organizations. CGA set up a standards writing, inspection, and certif
10、ication programme in the mid-1950s at a time when natural gas service was being extended to Eastern Canada and the West Coast. The standards programme now embraces more than 90 standards for gas appliances and accessories. Committees that write the standards include representation from all interests
11、 and are so constituted that no one interest may dominate. The interests represented include consumers, manufacturers, utilities, governmental inspection authorities, and certification organizations. Standards are prepared using the consensus principle with effort applied to reconcile differing opin
12、ions. Government inspection authorities having jurisdiction also ballot on the standards as members of,the Interprovincial Gas Advisory Council (IGAC). The CGA Standards Advisory Committee (SAC) reviews committee structures and procedures to determine that a standard meets the criteria of the Standa
13、rds Council of Canada. This Standard has been accepted by the Standards Committee, IGAC and SAC. This Standard is intended to be used within the scope of the standard by the manufacturing sector, by those applying the equipment, or those responsible for its proper application. It is the responsibili
14、ty of the user to determine in each case that the Standard is suitable for the specific application. The Standards Committee and IGAC normally stipulate an effective date for the Standard, delayed sufficiently to permit suppliers to make adjustments. CGA Approvals, incorporated 1993, operates a cert
15、ification programme for fuel-fired products which is accepted by all Canadian inspection authorities and accredited by the Standards Council of Canada. In addition, through the Canadian Gas Research Institute (CGRI), the gas industry is pursuing the improvement of equipment and the development of ne
16、w products. Data from these projects is available to Standards Committees for review and consideration. Recommendations for new standards and revisions to existing standards may come from any source. These suggestions should be addressed to the Standards 5epartment of CGA Approvals, Inc. Published b
17、y: CGA Approvals, Inc. 55 Scarsdale Road, DON MILLS (Toronto), Ontario, CANADA. M3B 2R3 LES NORMES NATIONALES DU CANADA SONT DlSPONlBLES EN VERSIONS FRANCAISE ET ANGLAJSE PRINTED IN CANADA CSA Standards Update ServiceCAN1-6.6-M78August 1978Title:Gas appliance thermostatsPagination:20 pages (ii preli
18、minary and 18 text)To register for e-mail notification about any updates to this publicationgo to www.Shop.CSA.caclick on E-mail Services under MY ACCOUNTclick on CSA Standards Update ServiceThe List ID that you will need to register for updates to this publication is 2006231.If you require assistan
19、ce, please e-mail techsupportcsa.ca or call 416-747-2233.Visit CSAs policy on privacy at www.csagroup.org/legal to find out how we protect your personal information.Blank pageCONTENTS Standards Committee List i Interprovincial Gas Advisory Council ii PART I INTEGRAL GAS VALVE TYPE THERMOSTATS . CONS
20、TRUCTION 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10 PART I1 2.1 2.2 2.3 2.4 2.5 Scope 1 General i 1 Connections Bolts, Nuts, Screws and Other Threaded Parts . 1 Adjustments 2 Strength . 2 Temperature Markings . 2 Resistance to Corrosion 3 Marking 3 Assembly . 3 INTEGRAL GAS VALVE TYPE THERMOSTATS FOR
21、LIQUID IMMERSION . PERFORMANCE Leakage 4 Accuracy of Dial Marking . 4 Capacity . 5 Valve Opening Characteristics of Snap-Acting Thermostats . 6 Continued Operation 6 PART I11 INTEGRAL GAS VALVE TYPE THERMOSTATS FOR GASEOUS IMMERSION . PERFORMANCE 3.1 Leakage 7 3.2 Accuracy of Dial Marking . 7 3.3 Ca
22、pacity . 8 3.4 Valve Opening Characteristics of Snap-Acting Thermostats . 8 3.5 Continued Operation 8 PART IV INTEGRAL GAS VALVE TYPE THERMOSTATS FOR SURFACE CONTACT . PERFORMANCE 4.1 Leakage 11 4.2 Accuracy of Dial Marking . 11 4.3 Effect of High Ambient Temperature on Performance of Thermostats fo
23、r Top Burners and Griddles . 12 12 4.4 Capacity . 4.5 Valve Opening Characteristics of Snap-Acting Thermostats . 12 4.6 Continued Operation 12 PART V 5.1 5.2 ELECTRIC SWITCH TYPE THERMOSTATS . GENERAL 13 General 13 Scope PART 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 i VI ELECTRICAL SWITCH TYPE THERMOSTATS .
24、GENERAL CONSTRUCTION General 13 Bolts, Nuts. Screws and Other Threaded Parts . 14 Pipe Threads 14 Adjustments 14 Mounting . 14 Temperature Markings . 14 15 Marking Resistance to Corrosion 14 PART VI1 ELECTRIC SWITCH TYPE THERMOSTATS . ELECTRICAL CONSTRUCTION 7.1 Electrical Components and Wiring . 15
25、 PART VI11 s.l 8.2 8.3 8.4 8.5 8.6 ELECTRICAL SWITCH TYPE THERMOSTATS . PERFORMANCE Exemptions . 15 Leakage . 15 Accuracy of Dial Markings 16 Dielectric Strength, Operating Temperatures, and Overload Tests 17 Continued Operation of the Temperature Control Mechanism . 17 Continued Operation of Other
26、Contacting Devices 17 PART IX Definitions 18 Blank pagei Janaury 1978 STANDARDS COMMITTEE ON ACCESSORIES FOR GAS-FIRED APPLIANCES AND EQUIPMENT - CGA 6.2-6.9 A. G. REED (Chairman) Honeywell Limited, 740 Ellesmere Road, SCARBOROUGH, Ontario. G. GROSS Harper-Wyman Company, 930 North York, HINSDALE , I
27、llinois. M1P 2V9 60521 A, W. ISHERWOOD Provincial Gas Company, 15 Church Street, ST. CATHARINES, Ontario. (Alternate: W. BISHOP) L2R 334 R. f. LAMBERT White Rodgers Company, 9797 Reavis Road, ST. LOUIS, Missouri. 63123 (Alternate: E.F. SHORT P.O. Box 150 Markham, Ontario. L3P fJ6) K. C. LEDUC Ascole
28、ctric Brantford, P.O. Box 160, 3RANTFORD, Ontario. NfT 5M8 H. LEWANDOWSKI Energy Safety Branch, Technical Standards Division, Ministry of Consumer and Commercial Relations, 400 University Avenue, TORONTO, Ontario. M7A 259 E. R. NEAR Union Gas Limited, 555 Riverview Drive, CHATHAM, Ontario. N7M 5M1 (
29、AI ternate : J. JONES) W. D. SMILLIE ITT Controls 6 Instruments, 55 Royal Road, GUELPH, Ontario. N1H 1T1 R. TERVIT Tervcon Limited, 1707 Sismet Road, Unit X2, MISSISSAUGA, Ontario. L4W 1P9 H. G. TYM Canadian Western Natural Gas, 140 - Sixth Avenue S.W., CALGARY, Alberta. T2P OP6 T. TYNE Canadian Sta
30、ndards Association, 178 Rexdale Blvd., REXDALE, Ontario. M9F 1R3 D. F. WEEKES Robertshaw Controls (Canada) Limited, 41 Medulla Avenue, TORONTO, Ontario. M8Z 5W1 L. J. WOJCIK Temprite Industries Limited, 6470 Viscount Road, MISSISSAUGA, Ontario. L4C lH3 H. WRIGHT United Gas Limited, 23 Main Street Ea
31、st, HAMILTON, Ontario. L8N 1E7 K. BALES Canadian Gas Association 55 Scarsdale Road, DON MILLS, Ontario M3B 2R3 ii INTERPROVINCIAL GAS ADVISORY COUNC1.L H. A. LINES (Chairman) Chief Gas Inspector, Department of Labour, Occupational Health E Safety Division, Gas Safety Unit, 1150 Rose Street, REGINA,
32、Saskatchewan. S4R 126 L. ADRIAN Chief, Safety Division, Department of Public Services, Govt of the Northwest Territories, YELLOWKNIFE, Northwest Territories. X1A 2L9 L. H. GILBERT Energy Safety Branch, Technical Standards Division, Ministry of Consumer E Commercial Relations, 400 University Avenue,
33、TORONTO, Ontario. M7A 259 E. S. HORNBY Assistant Dominion Fire Commissioner, Office of Dominion Fire Commissioner, Department of Public Works, Sir Charles Tupper Building, Riverside Drive, OTTAWA, Ontario. K1A OF12 R. H. JACKSON Government of the Yukon Territory, Department of Local Government, P.O.
34、 Box 2703, WHITEHORSE, Yukon Territory. Y1A 2C6 H. K. JENNS Office of the Provincial Fire Marshal, 2780 East Broadway, VANCOUVER, British Columbia. V5M 1Y8 (Alternate: K.H. COLLIER) J. J. LAVOIE Director, Technical Services, Electricity and Gas Board, Quebec Department of Natural Resources, 2100 Dru
35、mmond Street, MONTREAL, Quebec. H3G 1x1 (Alternate: J. SAMSON) January 1978 R. E. C. LYONS Technical Services Branch, New Brunswick Department of Labour, P.O. Box 6000, FREDERICTON, New Brunswick. E3B 5H1 J. T. MERCER Chief Gas Inspector, Gas Protection Branch, Department of Manpower 5 h, = 2.1963 x
36、 10 x Q1* x P x rd, D4 Ot and pdo= pressure drop (may be negative) between inlet and outlet pressure tappings on manifold as observed, Pa D = inside diameter of pipe at inlet or outlet pressure tapping, mm, and = absolute pressure of test gas (or air) at inlet or outlet pressure tappings, kPa . P 2.
37、4 VALVE OPENING CHARACTERISTICS OF SNAP- Snap-acting thermostats shall operate to open wi hout gradu 3 ting effect in excess of 0.15 pressures up to and including 16.5 inches W.C. (4.11 kPa), METHOD OF TEST The thermal element of the thermostat shall be immersed in a suitable bath, the tempera- ture
38、 of which may be varied and maintained at any predetermined temperature. The inlet connection of the thermostat shall be connected to a suitable pneumatic system capable of supplying clean air or nitrogen at pressures up to 16.5 inches W.C. (4.11 kPa ). An airtight connection shall be made between t
39、he outlet of the thermostat and a flowmeter capable of indicating accurately a flow rate of 0.15 ft3/h (4.2 cm3/h). ft 5 /h (4.2 rm /h) when sublected to inlet gas When a bypass is incorporated as a part of the thermostat and the bypass gas is dis- charged into the main gas supply before the outlet
40、of the thermostat, the bypass shall be sealed. Adjustable type thermostats shall be set at a temperature corresponding to the calibra- tion reference point specified in clause 1.7.4 and Table 11. The temperature at which the thermostat valve will snap open shall be determined at equilibrium conditio
41、ns. Starting with the thermostat valve open, the temperature of the bath shall be varied in the appropriate direction until the valve snaps closed. The temperature shall then be varied in the opposite direction until it has reached a point 3*F (ZOC) from the temperature at which the thermostat valve
42、 will snap open, and shall then continue to be varied in the same direction at a rate not in excess of IF CO.SoC)/min until the valve snaps open. For thermostats having a narrow range of temperature adjustment, the 3oF/min (2*C/min) and 1F/min (O.SoC/min) figures may be made approx. smaller at the d
43、iscretion of the testing agency. With air or nitrogen supplied to the thermo- stat inlet at pressures up to and including 16.5 inches W.C. (4.11 kPa), the flowmeter shall be observed throughout the opening cycle, and the maximum flow rate through the thermostat prior to the instant when the valve sn
44、aps open shall be noted. deemed met if the rate of gas flow through the thermostat prior to the instant whenfthe valve snaps open does not exceed 0.15 ft /h (4.2 cm3/h) in any test. This provision shall be 2.5 CONTINUED OPERATION Thermostats shali withstand continued operation for the following numb
45、er of cycles of opening and closing the thermostatic valve without any mechanical failure, impairment of operation or any apparent damage, and without development of any leakage in excess of that permitted under Section 2.1 Calibration change, as a result of continued operation for the number of cyc
46、les indicated, shall not exceed -fi 1OoF (5.5OC) or S%(whichever is greater) of the temperature range, as shown by the dial marking or specified by the manufacturer, 3.1 - 8- 3.2.1 50 000 Cycles for graduating types 100 000 Cycles for snap-acting types The number of cycles shall be accurately determ
47、ined by means of a counter connected in series with the pressure switch. METHOD OF TEST The test shall be conducted at the maximum dial marking and at no time shall the temp- erature of the thermal element exceed by 10F (5.5OC) or 5% the maximum temperature as shown on the dial (whichever is greater
48、). At the end of this test the thermostat shall be subjected to the leakage test outlined in Section 2.1. In addition, the accuracy of calibration of the thermostat at the calibration reference point shall be deter- mined by the method outlined in Section 2.2. The change in calibration as a result o
49、f the contiqued operation test shall not exceed +lOF (5.5OC) or 5% (whichever is greater)ofthe temperature range as shown by the dial marking or specified by the manufacturer. Finally, the thermostat shall be disassembled and a complete examination made of all parts. No part shall show evidence of being damaged or excessively worn. - c This test shall be conducted with the com- ponent parts, except the knob or dial, main- tained within plus 5% of the temperature specified by the manufacturer. (See clause 1.2.3). The inlet connection of a snap-acting or a graduating type thermosta
