Operating instructions

28
Part Number 550-142-784/0812
GWA Series 2 Gas-Fired Water Boilers – Boiler Manual
11 Service and maintenance continued
o Check/test. . . . . . . . . . continued
Diaphragm- or bladder-type — welded gas tight with a
rubbermembranetoseparatethetankpressurizingairand
thewater.Maybelocatedatanypointinthesystem,butmost
oftenfoundneartheboiler.
• Systemswiththistypeofexpansiontankrequireatleast
oneautomaticairvent,preferablylocatedontopofanair
eliminator,asshowninexamplesinManualSection 3,
page 10.
2. Ifreliefvalvehastendedtoweepfrequently,theexpansion
tankmaybewaterloggedorundersized.
Closed-type tank—tankismostlikelywaterlogged.Install
atankttingifnotalreadyinstalled.Thenchecklllevelper
ttingmanufacturer’sinstructions.Ifllleveliscorrect,check
tanksizeagainstmanufacturer’sinstructions.Replacewitha
largertankifnecessary.
Diaphragm- or bladder-type—rst,checktanksizetobe
sureitislargeenoughforthesystem.Ifsizeistoosmall,add
additionaltank(s)asnecessarytoprovidesufcientexpansion.
If tank size is large enough, removetank from system
and check charge pressure (usually 12 psig for residential
applications).Iftankwon’tholdpressure,membranehasbeen
damaged.Replacetank.
Boiler relief valve
1. Inspect the relief valve and lift the lever to verify ow as
in the following warnings, excerpted from a relief valve
manufacturer’s warning label. Before operating any relief
valve,ensurethatitispipedwithitsdischargeinasafearea
toavoidseverescaldpotential.ReadManualSection 3, page
10,beforeproceedingfurther.
2. Afterfollowingtheprecedingwarningdirections,iftherelief
valveweepsorwillnotseatproperly,replacethereliefvalve.
Ensurethatthereasonforreliefvalveweepingisthevalve
andnotover-pressurizationofthesystemduetoexpansion
tankwaterloggingorundersizing.
1. ReviewtheUser’sInformationManualwiththeowner.
2. Emphasizetheneedtoperformthe maintenanceschedule
speciedintheUser’sInformationManual(andinthismanual
as well).
3. Remindtheowneroftheneedtocallinalicensedcontractor
shouldtheboilerorsystemexhibitanyunusualbehavior.
4. Remindtheownertofollowthepropershutdownprocedure
andtoscheduleanannualstart-upatthebeginningofthe
nextheatingseason.
The boiler contains ceramic fiber and fiberglass
materials.Usecarewhenhandlingthesematerials
per instructions on page 39ofthismanual.Failure
to comply could result in severe personal injury.
1. Shut down boiler:
• Follow“ToTurnOffGastoAppliance”instructionsonboiler
and “OperatingInstructions”.
• Donotdrainboilerunlessitwillbeexposedtofreezing
temperatures.Ifusingantifreezeinsystem,donotdrain.
2. Follow shutdown procedure.
3. Remove venting system connection to boiler.
4. Removetopjacketpanel.Turnbackinsulation.
5. Remove ue collector. Clean sealant from assembly and
sections.
6. Remove radiation plates hanging between sections.
7. Removeburnersfrombase. Brushandvacuumburners to
removealldustandlint.Verifythatallburnerportsarefreeof
debris.
8. Placenewspapersinbaseofboilertocollectsoot.
9. Cleanbetweensectionswithwireuebrush.
10.Remove newspaperand soot.Vacuum or brush base and
surrounding area.
11. Reinstall radiation plates.
12.Replacecollectorbox/transitionassembly.Sealwithsealant.
Obtain gas-tight seal to prevent flue gas spillage and carbon
monoxideemissions,resultinginseverepersonalinjuryordeath.
13.Replaceinsulationandjackettoppanel.
14.Start up boiler followingSection 6, pages 15–17 of this
manualandtheboiler“OperatingInstructions”,pages 23 and
24.Excessivesootingindicatesimpropergascombustion.If
found,checkforpropercombustionandmakeanynecessary
adjustments.
o Cleaning boiler heating surfaces
 SafetyreliefvalvesshouldbereinspectedATLEAST
ONCE EVERYTHREEYEARS, bya licensed
plumbing contractor or authorized inspection
agency, to ensure that the product has not been
affected by corrosive water conditions and to
ensure that the valve and discharge line have not
been altered or tampered with illegally. Certain
naturally occurring conditions may corrode the valve
or its components over time, rendering the valve
inoperative. Such conditions are not detectable
unless the valve and its components are physically
removed and inspected. This inspection must
only be conducted by a plumbing contractor or
authorized inspection agency — not by the owner.
Failuretoreinspecttheboilerreliefvalveasdirected
couldresultinunsafepressurebuildup,whichcan
result in severe personal injury, death or substantial
property damage.
Following installation, the valve lever must be
operatedATLEASTONCEAYEARtoensurethat
waterwaysare clear. Certain naturally occurring
mineral deposits may adhere to the valve, rendering
it inoperative. When manually operating the lever,
waterwilldischargeandprecautionsmustbetaken
to avoid contact with hot water and to avoid water
damage.Beforeoperatinglever,checktoseethat
a discharge line is connected to this valve directing
the owof hot water from the valve to a proper
placeofdisposalotherwiseseverepersonalinjury
mayresult. Ifnowaterows,valveisinoperative.
Shutdownboileruntilanewreliefvalvehasbeen
installed.
o Review with owner