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37、ed on June 14, 2016 by ANSIApproved on June 26, 2016 by IGACEffective in Canada February 1, 2018Direct gas-fired process air heatersANSI Z83.25-2017 CSA 3.19-2017ANSI Z83.25-2017 CSA 3.19-2017Direct gas-fired process air heatersMarch 2017 2017 CSA Group 1ContentsInt erpro vincial Gas Advisory Counci
38、l (IGAC) 3Technical Committ ee on Performance and Installation of Gas Burning Appliances and Relate d Accessories 5Technical Committ ee on Gas Appliances and Relate d Accessories 8Joint Z83/CSA Technical Subcommitt ee on Standards for Gas-Fired Heavy -Duty Forced Air Heate r s 11Preface 141 Scope 18
39、2 Reference publications 193 Definitions 234 Cons truction 314.1 General construc tion 314.2 Assembly 334.3 Accessibility 334.4 Main burner s 334.5 Combus tion air control 344.6 Orifices and orifice fit tings 344.7 Automatic gas ignition s ys tems 354.8 Flame safeguards 364.9 Valve trains 374.10 Man
40、ual gas valves 384.11 Gas supply lines 384.12 Atmospheric vents and gas reliefs or bleeds 414.13 Automatic valves and safety shutoff valves 424.14 Gas appliance pressure regulator s 434.15 Discharge air , purge, limit contr ols, and int erlocks 434.16 Thickness of mater ials 464.17 Fan motor s 484.1
41、8 Fans 514.19 Air filter s 524.20 Pr ot ection of service per sonnel 524.21 Operating and instal lation instructi ons 544.22 Marking 585 Performance 625.1 General 625.2 Tes t gases 645.3 Tes t pressure and burner adjustments 655.4 Basic tes t arrangement 655.4.1 Tes t duct - outlet 65ANSI Z83.25-201
42、7 CSA 3.19-2017Direct gas-fired process air heatersMarch 2017 2017 CSA Group 25.4.2 Tes t duct inlet 665.4.3 Ins trumentation 665.5 Air throughput measurement 695.6 High tempe rature limit contr ol sy st em 695.7 Air flow sensing sy st ems 705.8 Operating tempe rature control sys tem 735.9 Combus ti
43、on 745.10 Burner operating charact erist ics 775.11 Pilot ed ignition sy st ems 775.12 Direct ignition sy st ems 795.13 Gas appliance pressure regulator s 805.14 Automatic valves 805.15 Burner and heat er input rating deter mination 805.16 Manifold and contr ol assembly capacity 815.17 Wall, floor (
44、optional), ceiling, electrical equipment, and wiring tem peratures 815.18 Electrical continuity and dielectric st rength 825.19 Heat ers for out door ins tallation 835.20 Rain and wind tes ts for inlet air openings 865.21 Marking mater ial adhesion and legibility 886 It ems unique to the United Stat
45、e s 886.1 Electrical equipment and wiring 886.2 General construc tion 1007 It ems unique to Canada 1017.1 Ins tructions and markings 1017.2 Electrical equipment and wiring 1017.3 French translations for quoted ins tructions and markings 1018 Manufacturing and pr oduction t ests 102Annex A (normative
46、) Emissions protocol 104Annex B (informative) Protocol for the measurement of and emissions ratings for Nitr ogen Oxides and Carbon Monoxide fr om direct gas-fired heat ers 117Annex C (informative) Pertinent references to ANSI Y14.15 119Annex D (informative) Wire color designations 120Annex E (infor
47、mative) Recommended wire color usage 121Annex F (informative) Preferred graphic sy mbols of commonly used it ems, extract ed from stand ard ANSI/IEEE 315, Graphic sy mbols for electrical and electron ics diagrams, and abbreviations for these it ems 122Annex G (informative) Table of conver sion facto
48、rs 124ANSI Z83.25-2017 CSA 3.19-2017Direct gas-fired process air heatersMarch 2017 2017 CSA Group 3Interprovincial Gas Advisory Council (IGAC)J.R. Mar shall Technical Standards b) relevant clause, table, and/or figure number;c) wording of the proposed change; andd) rationale for the change.6) To sub
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