Specifications

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Table of Contents
I. Product Description .................................................... 2
II. Specications ............................................................. 3
III. BeforeInstalling ......................................................... 4
IV. LocatingtheBoiler ..................................................... 4
V. AirforCombustion&Ventilation .............................. 5
VI. Venting ....................................................................... 9
VII.GasPiping..................................................................12
VIII.SystemPiping..........................................................13
IX.TanklessHeaterPiping..............................................18
X.Wiring........................................................................20
XI.Start-Up&Checkout.................................................24
XII.Service&Maintenance.............................................30
XIII.Troubleshooting........................................................33
XIV.Parts...........................................................................40
AppendixA:KnockdownBoilerAssembly.......................46
I Product Description
 TheCWIseriesboilersarelowpressurecastirongasredhotwaterboilersdesignedforuseinclosedhotwaterheating
systems.TheseboilersareCategoryIdraftdiverterequippedappliances,whichmustbeventedbynaturaldraftusingalined
masonryorlistedmetalchimneysystem.Anadequatesupplyofairforcombustion,ventilationanddilutionofuegases
mustbeavailableintheboilerroom.
 TheCWImaybeusedonforcedorgravityhotwaterheatingsystems.CWI103-CWI279includeatanklessheaterfor
domestichotwatergeneration.ThistanklessheaterisoptionalequipmentonCWI311-CWI380