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18、ceC22.2 No. 24-15January 2015Title: Temperature-indicating and -regulating equipmentTo register for e-mail notification about any updates to this publication go to shop.csa.ca click on CSA Update ServiceThe List ID that you will need to register for updates to this publication is 2423215.If you requ
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20、whatsoeverwithout the prior permission of the publisher.Published in January 2015 by CSA GroupA not-for-profit private sector organization178 Rexdale Boulevard,Toronto, Ontario, Canada M9W 1R3To purchase standards and related publications, visit our Online Store at shop.csa.caor call toll-free 1-800
21、-463-6727 or 416-747-4044.TMA trade-mar k of the Canadian S tandards Association, operating as “CSA Group”Temperature-indicating and-regulating equipmentC22.2 No. 24-15C22.2 No. 24-15Temperature-indicating and -regulating equipmentJanuary 2015 2015 CSA Group 1ContentsTechnical Committee on Consumer
22、and Commercial Products 5Subcommittee on Automatic Controls for Household Use 7Working Group on C22.2 No. 24 9Preface 101 Scope 122 Reference publications 123 Definitions 164 General requirements 184.1 General 184.2 Controls for specific applications 185 Construction 185.1 General 185.2 Frame and en
23、closure 195.2.1 General 195.2.2 Enclosures for transformers 205.2.3 Thickness of sheet metal enclosures 205.2.4 Thickness of enclosures made of insulating material 215.2.5 Enclosure doors and covers 215.2.6 Openings in enclosures 225.2.7 Weatherproof enclosures 235.2.8 Protection against rusting 235
24、.3 Mounting 235.4 Parts containing liquid metal 245.5 Operating mechanism and controls involving electronics 245.5.1 Operating mechanisms 245.5.2 Thermostat with marked OFF position 245.5.3 Electronic controls 255.5.4 Evaluation of safety controls 255.5.5 Safety control classification 255.5.6 Circui
25、t interfacing with safety controls 265.6 Supply connections 265.6.1 Permanently connected equipment 265.6.2 Cord-connected equipment 275.6.3 Bushings for cords 285.7 Terminal parts and leads 285.8 Electrical insulation 295.9 Current-carrying parts 305.10 Wiring 305.11 Transformers 32C22.2 No. 24-15T
26、emperature-indicating and -regulating equipmentJanuary 2015 2015 CSA Group 25.12 Capacitors 325.13 Suppressors and isolators 325.13.1 Surge suppressors 325.13.2 Optical devices 335.14 Switches 335.15 Fuses and fuseholder assemblies 335.16 Coil windings 335.17 Spacings 345.17.1 General 345.17.2 Low-v
27、oltage circuits 345.17.3 Class 2 circuits 355.17.4 Spacing on printed circuit boards 365.17.5 Creepages Materials with a known comparative track index 365.17.6 Through-air spacings Dielectric voltage-withstand test 365.17.7 Surge-controlled circuits 375.18 Separation of circuits 375.18.3 Barriers fo
28、r separation of circuits 385.18.4 Grouping of conductors 385.18.5 Grounded shielding 385.19 Assemblies secured by adhesives 395.20 Means for factory calibration of safety controls 395.21 Grounding and bonding 395.22 Power supplies 405.23 Motors 405.24 Telecommunication network equipment 405.25 Commu
29、nication applications 405.26 Temperature controls provided with a ground fault circuit interrupter 405.27 Electronic gas/air ratio controls 415.28 Thermal cut-offs 415.29 Thermistors 415.30 Room thermostats 415.31 Solar domestic hot water applications 416 Marking 417 Tests 447.1 Sequence of tests 44
30、7.2 Rated conditions 447.3 Rating 457.3.1 Open-circuit voltage 457.3.2 Input and output 457.4 Temperature 457.5 Operation 477.5.1 Electromagnets 477.5.2 Combination gravity-type tip switches and temperature-limiting thermostats 477.6 Calibration 477.7 Overload 487.8 Conditioning of safety controls 5
31、17.9 Endurance 51C22.2 No. 24-15Temperature-indicating and -regulating equipmentJanuary 2015 2015 CSA Group 37.10 Dielectric strength 537.11 Short-circuit 547.12 Snap-on covers 567.13 Impact 567.14 Flame Test 577.15 Negative bias capillary controls 577.16 Damper motors 577.17 Evaluation of coatings
32、on printed circuit wiring boards 577.17.1 General 577.17.2 Dielectric strength on printed wiring boards 577.17.3 Dielectric strength after temperature conditioning 587.17.4 Dielectric strength after humidity conditioning 587.17.5 Adhesion 587.18 Assemblies secured by adhesives 587.19 Strength of flu
33、id-containing parts 597.20 Fluid leakage 597.21 Parts containing liquid metal 607.22 Strain relief 607.23 Additional requirements for manual reset temperature-limiting controls 617.24 Dielectric voltage-withstand test in lieu of measuring spacings 617.25 Surge immunity test 627.26 Electrical fast tr
34、ansient/burst immunity test 627.27 Abnormal testing 627.28 Push/pull-and-turn controls 637.29 Leakage current 638 Requirements for extra-low-voltage thermostats with heat anticipators 648.1 Scope 648.2 Enclosures 648.3 Burnout 658.3.1 Test criteria 658.3.2 Test conditions 658.3.3 Test procedure 658.
35、4 Marking 669 Supplementary requirements for thermally activated relays and sequencers for use in electriccentral warm air furnaces 669.1 Scope 669.2 General 669.3 Initial calibration 679.4 Operation at minimum normal voltage and temperature 679.5 Positive off and extreme temperature 679.6 Operation
36、 at maximum normal temperature and overvoltage 689.7 Overload and endurance 689.8 Number of endurance operations 689.9 Recalibration 689.10 Marking 6810 Fluorescent lamp ballast protectors 69C22.2 No. 24-15Temperature-indicating and -regulating equipmentJanuary 2015 2015 CSA Group 410.1 Scope 6910.2
37、 General 6910.3 Calibration 6910.4 Endurance 6910.5 Spacings 7010.6 Limited short-circuit 7010.7 Marking 7011 Tests for single-operation devices 7011.1 General 7011.2 Reset mechanism 7011.3 Calibration test 7111.4 Refunctioning temperature test 7111.5 Conditioning test 7111.6 Refunctioning temperatu
38、re test below 0 C but not below 35 C 7111.7 Refunctioning temperature test below 35 C 7211.8 Overload test 7211.9 Dielectric strength 73Annex A (normative) Electronic gas/air ratio controls (see Clause ) 101Annex B (informative) Marking translations 109C22.2 No. 24-15Temperature-indicating and -regu
39、lating equipmentJanuary 2015 2015 CSA Group5Technical Committee on Consumer andCommercial ProductsA. Milne 21st Olympiad Sales,Burlington, OntarioCategory: General InterestChairD. Mascarenhas Brampton, OntarioCategory: General InterestVice-ChairD.P. Badry Government of Yukon,Whitehorse,YukonCategory
40、: Regulatory AuthorityG. Benjamin Thomas reference publications list in Clause 2 expanded and updated; definitions added to Clause 3; construction provisions clarified in Clauses 5.1.8 and 5.1.9; Clauses 5.2.6.11 and 5.2.6.12 expanded to clarify investigation; provisions applicable to mercury remove
41、d from Clause 5.4; Clause 5.5 revised and expanded; Clause 5.10.15 added; Clause 5.11 expanded to include additional provisions for transformers; Clause 5.12.5 added to clarify capacitors used in applications that require X and Y classifications; Clause 5.13 rewritten to define surge suppressors and
42、 optical devices; provisions applicable to mercury switches (Clauses 4.14.3 and 4.14.4 in the previous edition) deletedbecause mercury switches are no longer acceptable; new clauses added to the construction provisions in Clause 5 as follows: Clause 5.22, Power supplies; Clause 5.23, Motors; Clause
43、5.24,Telecommunication network equipment; Clause 5.25, Communication applications; Clause 5.26,Temperature controls provided with a ground fault circuit interrupter; Clause 5.27, Electronic gas/air ratio controls; Clause 5.28,Thermal cut-offs; Clause 5.29,Thermistors; and Clause 5.30, Room thermosta
44、ts; Clause 6.1(m) added; Clause 7.6.1 clarified; Clause 7.7.21 added for controls provided with manual actions; Clauses 7.9.2.1, 7.9.2.2, and 7.9.2.3 added for clarity; Clause 7.9.9 added for clarity; Clause 7.10.10 added for clarity; Clause 7.11.6 revised; Clause 7.16.4 added to address damp actuat
45、ors; Clauses7.21 revised to remove references to mercury; Clause 7.25 updated and title changed from “Transient-voltage surge suppression” to “Surgeimmunity test”; Clauses 7.26 to 7.29 added; Clause 11 added; Table 4 updated with additional tests: surge immunity, short-circuit, and abnormal; Table 6
46、 updated (Items 3, 4, and 7 to 9); Table 10 updated Items 3, 4, and 6 to 9 and Notes and ; Figure 5 corrected;C22.2 No. 24-15Temperature-indicating and -regulating equipmentJanuary 2015 2015 CSA Group 11 Figures 7 and 8 added; Annex A (normative) added; and Annex A from the previous edition renamed
47、Annex B.Permission to use extracts from ISO 23552-1:2007, Safety and control devices for gas and/or oil burnersand gas and/or oil appliances Particular requirements Part 1: Fuel/air ratio controls, electronictype, was provided by the Standards Council of Canada in cooperation with IHS Canada. No fur
48、therreproduction of this material is permitted without prior written approval from the Standards Council ofCanada.This Standard is considered suitable for use for conformity assessment within the stated scope of theStandard.This Standard was prepared by the Working Group on C22.2 No. 24 and the Subc
49、ommittee onAutomatic Controls for Household Use, under the jurisdiction of the Technical Committee on Consumerand Commercial Products and the Strategic Steering Committee on Requirements for Electrical Safety,and has been formally approved by the Technical Committee.Interpretations: The Strategic Steering Committee on Requirements for Electrical Safety has providedthe following direction for the interpretation of standards under its jurisdiction: “The literal text shall beused in judging compliance of pr
