1、REVISED SEPTEMBER 2014ANSI Z21.56-2014 CSA 4.7-2014Gas-fired pool heatersLegal Notice for StandardsCanadian Standards Association and CSA America, Inc. (operating as “CSA Group”) develop standards through a consensus standardsdevelopment process approved by the Standards Council of Canada and the Am
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18、tance of the terms and conditions of this Legal Notice.Revision HistoryANSI Z21.56-2014 CSA 4.7-2014 Gas-fired pool heatersRevision Issued: Errata September 2014 Revision symbol (inmargin)Clause 5.4.1Standards Update ServiceANSI Z21.56-2014 CSA 4.7-2014May 2014Title: Gas-fired pool heatersTo registe
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22、 America Inc., operating as “CSA Group”American National Standards Institute, Inc.Interprovincial Gas Advisory CouncilApproved on April 21, 2014 by ANSIApproved on May 28, 2014 by IGACEffective in Canada January 1, 2016Gas-fired pool heatersANSI Z21.56-2014 CSA 4.7-2014ANSI Z21.56-2014 CSA 4.7-2014G
23、as-fired pool heatersMay 2014 2014 CSA Group1ContentsInterprovincial Gas Advisory Council 4Canadian Technical Committee on Gas Appliances and Related Accessories 6Z21/83 Technical Committee on Performance and Installation of Gas Burning Appliances and RelatedAccessories 8Joint Technical Sub-Committe
24、e on Standards for Gas-Fired Water Heaters 11Preface 171 Scope 202 Reference publications 213 Definitions 254 Construction 354.1 General construction and assembly 354.2 Materials 384.3 Combustion air supply 414.4 Appliance openings 414.5 Burners 424.6 Flame spreaders 434.7 Primary air adjustment mea
25、ns 434.8 Main burner orifices and orifice fittings 444.9 Automatic gas ignition systems 444.10 Pilot filters 494.11 Gas and water connections 494.12 Dip tubes 524.13 Manually operated gas valves 524.14 Gas appliance pressure regulators and gas pressure switches 534.15 Adjustment of minimum input rat
26、ing 544.16 Thermostats 544.17 Automatic valves and safety shutoff valves 554.18 Bleeds and vents 564.19 Temperature and pressure limiting devices 564.20 Flue collars 584.21 Flue pipe extensions 584.22 Relief valves 584.23 Draft hoods 594.24 Automatic vent damper devices 594.25 Automatic flue damper
27、devices 604.26 Electrical equipment and wiring 624.27 Motors 764.28 Instructions 774.29 Marking 82ANSI Z21.56-2014 CSA 4.7-2014Gas-fired pool heatersMay 2014 2014 CSA Group25 Performance 905.1 General 905.2 Test Gases 935.3 Test pressures and burner adjustments 945.4 Combustion 955.5 Burner and pilo
28、t operating characteristics 975.6 Piloted ignition systems 995.7 Proved igniter systems 1045.8 Direct ignition systems 1065.9 Heat roll-out safety shutoff means 1085.10 Thermal efficiency 1095.11 Gas appliance pressure regulators 1125.12 Temperature control 1125.13 Tank type heater temperature limit
29、s 1165.14 Automatic gas shutoff systems 1175.15 Evaluation of burn hazard potential of exterior surfaces 1195.16 Wall, floor and ceiling temperatures 1225.17 Flue gas temperature 1275.18 Burner and flame spreader temperatures 1285.19 Draft hoods 1295.20 Draft tests for pool heaters equipped with pow
30、er burners 1325.21 Evaluation of fabric ignition potential 1355.22 Automatic vent damper devices 1355.23 Automatic flue damper devices 1355.24 Water-carrying parts 1385.25 Non-metallic dip tubes 1385.26 Burner durability 1415.27 Wind test 1425.28 Outdoor Installation 1445.29 Safety circuit analysis
31、1465.30 Marking material adhesion and legibility 1476 Manufacturing and production tests 1477 Items unique to the United States 1497.1 Marking material adhesion and legibility 1497.2 General construction and assembly 1498 Items unique to Canada 1498.1 Automatic vent dampers 1498.2 High altitude 1498
32、.3 Outdoor installation 1508.4 Marking material adhesion and legibility 1508.5 Draft hoods 1508.6 French translations for quoted instructions and markings 150Annex A (normative) Outline of lighting instructions for appliances equipped with continuouspilots 165Annex B (normative) Outline of operating
33、 instructions for appliances equipped with intermittentpilot or interrupted pilot systems 168ANSI Z21.56-2014 CSA 4.7-2014Gas-fired pool heatersMay 2014 2014 CSA Group3Annex C (normative) Outline of operating instructions for appliances equipped with direct ignitionsystems 171Annex D (normative) Opt
34、ional provisions for listed gas appliance conversion kits 174Annex E (informative) Pertinent references to ANSI Y14.15 177Annex F (informative) Wire color designations 178Annex G (informative) Recommended wire color usage 179Annex H (informative) Preferred graphic symbols of commonly used items, ext
35、racted from standardANSI/IEEE 315, Graphic symbols for electrical and electronics diagrams, andabbreviations for these items 180Annex I (informative) Sample failure modes and effects analysis for component miswiring* 182Annex J (informative) Table of conversion factors 183Annex K (informative) Legib
36、ility and design of safety information in water heater markings andmanuals 186ANSI Z21.56-2014 CSA 4.7-2014Gas-fired pool heatersMay 2014 2014 CSA Group4Interprovincial Gas Advisory CouncilJ. Renaud Rgie du btiment du Qubec,Montral, Qubec, CanadaCategory: Government and/or Regulatory AuthorityChairJ
37、.R. Marshall Technical Standards c) wording of the proposed change; andd) rationale for the change.5) To submit a request for interpretation of this Standard, please send the following information toinquiriescsagroup.organd include “Request for interpretation” in the subject line:a) define the probl
38、em, making reference to the specific clause, and, where appropriate, include anillustrative sketch;b) provide an explanation of circumstances surrounding the actual field condition; andc) where possible, phrase the request in such a way that a specific “yes” or “no” answer will address theissue.Comm
39、ittee interpretations are processed in accordance with the CSA Directives and guidelines governingstandardization and are available on the Current Standards Activities page at standardsactivities.csa.ca.ANSI Z21.56-2014 CSA 4.7-2014Gas-fired pool heatersMay 2014 2014 CSA Group18History of the develo
40、pment of ANSI Z21.56-2014 CSA 4.7-2014Note: This history is informative and is not part of the standard.With the onset of the Free Trade Agreement between the United States and Canada on January 2, 1988,significant attention was given to the harmonization of the United States and Canadian safety sta
41、ndardsaddressing gas-fired equipment for residential, commercial and industrial applications. It was believedthat the elimination of the differences between the standards would remove potential trade barriersand provide an atmosphere in which North American manufacturers could market more freely in
42、theUnited States and Canada. The harmonization of these standards was also seen as a step towardharmonization with international standards. Joint subcommittees were established to facilitate thestandards harmonization process between the United States and Canada.The draft harmonized standard was bas
43、ed on current coverage from the American National Standardfor Gas-Fired Pool Heaters, ANSI Z21.56-1993 and Addenda Z21.56a-1994, Z21.56b-1994 and theCanadian Standard for Gas-Fired Pool Heaters, CAN1-4.7-M85. The draft was subsequently issued forpublic review and comment during April 1996.Following
44、reconsideration and modification of the proposed draft standard, in light of commentsreceived, the joint water heater subcommittee, at its July 24-25, 1996 meeting, recommended theproposed draft to the Z21 Committee and the CGA Standards Steering Committee for approval.The proposed draft of the harm
45、onized standard for gas-fired pool heaters, as modified by the jointsubcommittee at its meeting of July 24-25, 1996, was approved by the Z21/83 Committee by at its April17, 1997 meeting and by the CGA Standards Steering Committee on May 6, 1997.The first edition of the harmonized Z21/CSA Standard fo
46、r Gas-Fired Pool Heaters, was approved by theCanadian Interprovincial Gas Advisory Council on September 10, 1997 and by the American NationalStandards Institute Inc. on March 19, 1998.The second edition of the harmonized Z21/83/Canadian Standards Association Standard for Gas-FiredPool Heaters, was a
47、pproved by the Canadian Interprovincial Gas Advisory Council on August 1, 2001 andby the American National Standards Institute Inc. on December 20, 2001.The third edition of the harmonized Z21/CSA Standard for Gas-Fired Pool Heaters was approved by theCanadian Interprovincial Gas Advisory Council on
48、 January 4, 2006 and by the American NationalStandards Institute, Inc. on December 13, 2005.The fourth edition of the harmonized Z21/CSA Standard for Gas-Fired Pool Heaters was approved by theCanadian Interprovincial Gas Advisory Council on February 25, 2013, and by the American NationalStandards In
49、stitute, Inc. on January 9, 2013.This, the fifth edition of the harmonized Z21/CSA Standard for Gas-Fired Pool Heaters, was approved bythe Canadian Interprovincial Gas Advisory Council on May 28, 2014 and by the American NationalStandards Institute, Inc. on April 21, 2014.The previous editions of the Standard for Gas-Fired Pool Heaters, and addenda thereto, approved bythe Interprovincial Gas Advisory Council and American National Standards Institute, Inc. are as follows:ANSI Z21.56-2014 CSA 4.7-2014Gas-fired pool he
