Crown Bermuda Installation Manual

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FIGURE19a:MAINBURNERFLAME-1”BURNERS
FIGURE19b:MAINBURNERFLAME-40mm
 (“HIGHALTITUDE”)BURNERS
17)Testthermostatoperationwhiletheboilerisrunning.Turnthethermostattothelowestsetting.Bothpilotburnerand
mainburnersshouldstopring.Raisethethermostatbacktothehighestsetting.Thepilotburnerandmainburnersshould
relight.
18)Verifylowwatercutoffoperationwhiletheboilerisrunning.Slowlyopendrainvalveanddrainboileruntilthewater
leveldropsbelowlowwatercutoffline.Waterstillshouldbevisibleinthegaugeglasswhenthelowwatercutoffshuts
downthemainburners.Bothpilotburnerandmainburnersshouldstopring.Makesurepressurelimit,thermostatorother
controlshavenotshutofftheboiler.Upontestcompletionrelltheboilertothenormalwaterlevel.
19)Checkpressurelimitcontroloperation.Whensteampressureisregisteredonpressuregauge,lowerpressurelimit
settingbelowgaugereading.Bothpilotburnerandmainburnersshouldstopring.Raisepressurelimitsettingabovegauge
reading.Thepilotburnerandmainburnersshouldrelight.
20)Aftertheboilerhasoperatedforapproximately30minutes,checktheboilerandheatingsystempipingforleaks.Repair
anyleaksfoundatonce.
21)Inspecttheventsystemforuegasleaks.Repairanyleaksfoundbeforeleavingtheboilerinoperation.
22)Replacementofasteamboilertendstobreaklooseaccumulatedscalefromthesystem.Duringtherstweekof
operation,blowdownthe#67lowwatercut-offatleastthreetimesfollowingtheblowdowninstructionsontheyellow
stickeradjacenttothelowwatercut-off.
23)Afternewboilerhasbeeninstalledandputintocontinuousoperationforseveraldays,cleantheboilerofoil,grease,
sludge,andothercontaminantsthatmayhavebeenpresentinexistingpiping.Thiswillpreventunsteadywaterlineandwater
carryoverintosupplymain.Theboilerboil-outshouldbedoneasfollows:
a) TurnoffgassupplytoboilerpertheappropriateLightingandOperatinginstructionsonpage25-26.
b) Drainwaterfromboileruntilaboutoneinchofwaterisvisibleingaugeglass.
c) Runahoseortemporarypipingfromtheboilerdrainvalvetoalocationwherehotwatercanbesafelydischarged.
Drainapproximatelyvegallonsofwaterfromtheboilerandmix-inanappropriateamountofanapprovedboil-
outcompound.Removesafetyvalveandrelltheboilerwithpreparedsolutionthroughfunnelinsertedintoelbow
underthesafetyvalve.Runahoseortemporarypipingfromsafetyvalvetappingtoalocationwherehotwatercan
besafelydischarged.DO NOT INSTALL ANY VALVES IN THIS LINE.
d) Lightofftheboilerpertheappropriateinstructionsonpage25-26.Runboilerforseveralhours,boilingthewater,
withoutgeneratingsteampressure.Openthewaterfeedvalvesufcientlytoallowaslightoverowofwaterthrough
thesafetyvalvetappingdrainline.Continueboilinguntilwatercomingoutisclear.
e) TurnoffgassupplytoboilerpertheappropriateLightingandOperatinginstructionsonpages25-26.Drainhot
waterfromboilerthroughboilerdrainvalvetoalocationwherehotwatercanbesafelydischarged.Relltheboiler
tonormalwaterlinelevel.Ifwaterinthegaugeglassdoesnotlookclear,repeataboveboil-outprocedureagain
untilwaterisclears.