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18、re required to destr oy them immediately . Use of this document constitut es your acceptance of the terms and conditions of this Legal Notice.Revision HistoryANSI Z21.13-2017 CSA 4.9-2017, Gas-fired low pressure steam and hot water boilersRevision from previous edition Revision symbol (in margin)Cla
19、uses 4.5.14 , 4.5.15 , 4.6.3 , 4.8.1 , 4.8.4 , 4.23.2 , 4.33.1 , 5.9.1 , 5.25.4 , 6.2 , and E.3Standards Update ServiceANSI Z21.13-2017 CSA 4.9-2017May 2017Title: Gas-fired low pressure steam and hot water boilersTo regist er for e-mail notification about any updat es to this publication go to shop.
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35、an National Standards Ins titute, Inc. 25 West 43rd Street, Fourth floor New York, NY 10036ISBN 978-1-4883-0413-2 2017 CSA Group All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher .Published in May 2017 by CSA Group
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37、A America Inc., operating as “CSA Group”American National Standards Institute, Inc.Interprovincial Gas Advisory CouncilApproved on May 11, 2017 by ANSIApproved on April 22, 2017 by IGACEffective in Canada December 1, 2018Gas-fired low pressure steam and hot water boilersANSI Z21.13-2017 CSA 4.9-2017
38、ANSI Z21.13-2017 CSA 4.9-2017Gas-fired low pressure steam and hot water boilersMay 2017 2017 CSA Group1ContentsInt erpro vincial Gas Advisory Council 4Z21/83 Technical Committ ee on Performance and Inst allation of Gas Burning Appliances and Relat ed Accessories 6CSA Technical Committ ee on Gas Appl
39、iances and Relate d Accessories 9Joint Technical Sub-Commit tee on Standards For Gas-Fired Low -Pressure Steam and Hot Wat er Boilers 12Preface 171 Scope 202 Reference publications 223 Definitions 254 Cons truction 374.1 General construc tion 374.2 Assembly 394.3 Accessibility 394.4 Combus tion air
40、and ventilation openings 404.5 Main burner s 414.6 Primary air adjust ment means 434.7 Orifice spuds and orifice fit tings 444.8 Automatic gas ignition s ys tems 444.9 Flame spreaders 514.10 Manual gas valves 514.11 Gas supply lines 524.12 Bleeds and vents 554.13 Automatic valves and safety shutoff
41、valves 564.14 Gas appliance pressure regulator s and gas pressure inter locks 584.15 Adjus tment for minimum input rating 594.16 Condensat e disposal 594.17 Pilot gas filt ers 604.18 Limiting devices 604.19 Safety and relief valves 604.20 Low water cutoffs 614.21 Thickness of mater ials 614.22 Boile
42、r construc tion 644.23 Electrical equipment and wiring 644.24 Motor s and blower s 784.25 Pr ot ection of service per sonnel 794.26 Flue collector s 824.27 Flue connections and integr al venting s ys tems 824.28 Draft hoods 83ANSI Z21.13-2017 CSA 4.9-2017Gas-fired low pressure steam and hot water bo
43、ilersMay 2017 2017 CSA Group24.29 Automatic vent damper devices 844.30 Automatic flue damper devices 854.31 Vent -air intake pipes of direct vent sys tem s 874.32 Wat er connections 874.33 Ins tructions 884.34 Users information manual 934.35 Marking 945 Performance 1035.1 General 1035.2 Tes t gases
44、1075.3 Inlet tes t pressures and burner adjustments 1085.4 Cat egory deter mination 1095.5 Combus tion 1125.6 Burner operating charact erist ics 1145.7 Pilot ed ignition sy st ems 1155.8 Direct ignition sy st ems 1205.9 Pr oved ignit er sy st em 1225.10 Flame roll -out safety shutoff means 1245.11 M
45、ain burner and flame spreader tempe ratures 1255.12 Nonload-bearing flue gas baffle tempe ratures 1275.13 St eam pressure limiting devices 1285.14 Wat er t emperature limiting devices 1285.15 Manifold and contr ol assembly capacity 1305.16 Safety circuit analysis 1305.17 Power interruption 1305.18 W
46、all, floor , ceiling, electrical component and venting s ys tem tem peratures 1305.19 Flue gas tempe rature 1405.20 Flue collector s 1415.21 Blocked vent shutoff sys tem 1415.22 Draft hoods 1425.23 Blocked vent t est for boilers equipped with forced or induced draft burners and without draft hoods o
47、r regulator s 1445.24 Automatic flue damper devices 1465.25 Direct vent sy st ems 1495.26 Boiler s for outdoor ins tallation 1565.27 Boiler s vented horizontally thr ough an outside wall 1585.28 Condensat e disposal s ys tem(s) 1615.29 Venting s yst ems for category II, III, or IV boilers 1625.30 Ma
48、rking mater ial adhesion and legibility 1636 Manufacturing and pr oduction t ests 1647 It ems unique to Canada 1657.1 Annual fuel utilization efficiency 1657.2 Scope 1657.3 Automatic vent damper devices 1657.4 Ins tructions 1667.5 Electrical requirements 166ANSI Z21.13-2017 CSA 4.9-2017Gas-fired low
49、 pressure steam and hot water boilersMay 2017 2017 CSA Group37.6 French translations for quoted ins tructions and markings 1667.7 Direct ignition sy st ems over 400,000 btu/h 1827.8 Metrication 1827.9 High altitude 183Annex A Outline of lighting ins tructions for appliances equipped with continuous pilots 184Annex B Outline of operating inst ructions for appliances equipped with int ermit tent pilot or inter rupted pilot sy st ems 187Annex C Outline of operating inst ructions for appliances equipped with direct ignition sy st ems 190Annex D Flue
