ProSelect Force Steam Gas Boiler Installation Manual
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CAUTION
LABELALLWIRESPRIORTODISCONNECTIONWHENSERVICINGCONTROLS.WIRINGERRORS
CANCAUSEIMPROPERANDDANGEROUSOPERATION.VERIFYPROPEROPERATIONAFTER
SERVICING.
11) Inspecttheboilerandsystemforleaks.
12) InspecttheHydroLevelCG400Alowwatercut-off:
Removeandinspecttheprobeforscaleandsedimentbuildup.Cleananysedimentorscalefromtheprobewitha
scouringpadorsteelwool.ConsulttheHydrolevelCG400Amanualforanyadditionalmaintenanceinformation.Test
thelowwatercut-offbeforeplacingtheboilerbackintoservice.
13) Allowtheboilertocooltoroomtemperature.Removethedrainvalveand2x3/4bushingontheleftsideoftheboiler.
Useaashlighttoinspectthebottomrowofpushnipplesforaccumulatedscaleormud.Ifasignicantamountis
present,usethefollowingproceduretocleantheinsideoftheheatexchanger:
a) Temporarilyinstalla11/4inchorlargerfullportballvalveinplaceoftheboilerdrain.Temporarilypipetheoutlet
ofthisvalvetoalocationwherehotwaterandsteamcanbesafelydischarged.
b) Makesurethatthisvalveisclosedandthatthewaterlevelisatthenormalwaterline.
c) Ifakingvalveispresentinthesteammaintakeoff,closeit.Alternatively,temporarilyreplaceenoughofthe
ventsonthemainsand/orradiatorswithplugssothat2-5psicanbedevelopedwhentheboilerisred.
d) Firetheboilerandallowittosteamuntil2-5psiisregisteredonthegauge.
e) Turnofftheburnersandimmediatelyfullyopenthe1-1/4valve.
f) Allowtheboilertoblowdownuntileitherthewaterrunsclearorthewaterlevelreachesthebottomofthegauge
glass.
g) Allowallpartsoftheboilertocooltoroomtemperature.Draintheboilercompletelyandremovethe1-1/4valve.
h) Ifsignicantmudorscaleisstillpresentinthebottomoftheboiler,repeatsteps(b)through(g)untilallmudor
scaleisremoved.
i) Onceallmudorscaleisremoved,replacethe1-1/4valveandtemporaryblow-downpipingwiththestandarddrain
valve.Afterallpartsoftheboilerareatroomtemperature,relltheboilertothenormalwaterline.
14) Placetheboilerbackinoperationusingtheprocedureoutlinedin“Start-up”.Checkthepilotlineandanyothergas
pipingdisturbedduringtheinspectionprocessforleaks.
XII. Service Instructions (continued)