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18、, you are required to destroy them immediately. Use of this documentconstitutes your acceptance of the terms and conditions of this Legal Notice.Revision HistoryANSI Z21.10.3-2015 CSA 4.3-2015, Gas-fired water heaters, volume III,storage water heaters with input ratings above 75,000 Btu per hour,cir
19、culating and instantaneousRevisions from the Sixth Edition Revision symbol (inmargin)Clauses 1.13, 3, 4.1.25, 4.22, 4.30.2, 4.31.12, 4.31.32, 5.1.20,5.5, 5.28, 5.29.2, 5.32, 7.1, E.2, and E.3Figures 2-A and 2-BStandards Update ServiceANSI Z21.10.3-2015 CSA 4.3-2015November 2015Title: Gas-fired water
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37、 and CSA America Inc., operating as “CSA Group”American National Standards Institute, Inc.Interprovincial Gas Advisory CouncilApproved on October 5, 2015 by ANSIApproved on August 7, 2015 by IGACEffective in Canada April 1, 2017Gas-fired water heaters, volume III,storage water heaters with inputrati
38、ngs above 75,000 Btu per hour,circulating and instantaneousANSI Z21.10.3-2015 CSA 4.3-2015ANSI Z21.10.3-2015 CSA 4.3-2015Gas-fired water heaters, volume III, storage water heaters with inputratings above 75,000 Btu per hour, circulating and instantaneousNovember 2015 2015 CSA Group 1ContentsInterpro
39、vincial Gas Advisory Council 4Z21/83 Technical Committee on Performance and Installation of Gas Burning Appliances and RelatedAccessories 6CSA Technical Committee on Gas Appliances and Related Accessories 9Joint Technical Advisory Group on Standards for Gas-fired Water Heaters 12Preface 171 Scope 20
40、2 Reference publications 223 Definitions 264 Construction 374.1 General construction 374.2 Materials 434.3 Combustion air supply 464.4 Water heater openings 474.5 Burners 474.6 Flame spreaders 484.7 Primary air adjustment means 494.8 Main burner orifices and orifice fittings 504.9 Automatic gas igni
41、tion systems 514.10 Pilot gas filters 554.11 Gas connections 554.12 Opening for relief valve 584.13 Dip tubes 584.14 Manually operated gas valves 584.15 Gas appliance pressure regulators and gas pressure switches 594.16 Adjustment of minimum input rating 604.17 Thermostats 614.18 Automatic valves an
42、d safety shutoff valves 614.19 Bleeds and vents 624.20 Automatic gas shutoff systems 624.21 Relief valves 634.22 Condensate disposal 644.23 Flue collars 644.24 Flue pipe extensions 654.25 Draft hoods 654.26 Automatic vent damper devices 664.27 Automatic flue damper devices 664.28 Electrical equipmen
43、t and wiring 684.29 Vent and air intake pipes of direct vent systems 82ANSI Z21.10.3-2015 CSA 4.3-2015Gas-fired water heaters, volume III, storage water heaters with inputratings above 75,000 Btu per hour, circulating and instantaneousNovember 2015 2015 CSA Group 24.30 Instructions 834.31 Marking 95
44、5 Performance 1065.1 General 1065.2 Test gases 1125.3 Test pressures and burner adjustments 1145.4 Combustion 1145.5 Category determination 1165.6 Burner and pilot operating characteristics 1215.7 Piloted ignition systems 1235.8 Proved igniter systems 1285.9 Direct ignition systems 1305.10 Efficienc
45、y 1325.11 Gas appliance pressure regulators 1325.12 Automatic valves and safety shutoff valves 1325.13 Temperature control 1325.14 Storage heater temperature limits 1335.15 Temperature limiting devices 1355.16 Evaluation of burn hazard potential of exterior surfaces 1375.17 Wall, floor and ceiling t
46、emperatures 1405.18 Flue gas temperature 1435.19 Temperature of manually operated parts 1445.20 Burner and flame spreader temperatures 1455.21 Draft hoods 1465.22 Draft tests for water heaters equipped with power burners 1495.23 Automatic vent damper devices 1525.24 Automatic flue damper devices 152
47、5.25 Wind test 1555.26 Safety circuit analysis 1585.27 Capacities of storage vessels 1585.28 Capacities of tube type water heaters 1595.29 Hydrostatic test 1595.30 Non-metallic dip tubes 1605.31 Burner durability 1635.32 Venting systems for Category II, III, or IV water heaters 1635.33 Rain tests 16
48、45.34 Direct vent systems 1665.35 Marking material adhesion and legibility 1736 Manufacturing and production tests 1747 Items unique to the United States 1757.1 High altitude 1757.2 Thermal efficiency 1757.3 Temperature and pressure relief valves 1757.4 Marking material adhesion and legibility 1757.
49、5 General construction and assembly 176ANSI Z21.10.3-2015 CSA 4.3-2015Gas-fired water heaters, volume III, storage water heaters with inputratings above 75,000 Btu per hour, circulating and instantaneousNovember 2015 2015 CSA Group 38 Items unique to Canada 1768.1 High altitude 1768.2 Relief valves 1768.3 Storage vessels 1768.4 Outdoor installation 1768.5 Marking material tests 1768.6 Draft hoods 1768.7 Pilot burners and safety shutoff devices 1778.8 Thermal efficiency 1778.9 French translations for quoted instructions and markings 177Annex A (normative)
