A.O. Smith BL-100 - Draining and Flushing

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4. Putcapwithmaleadapterbackonthecontainerandslide3/4”
hoseoverendofmaleadapterandfasteninplaceusinghose
clampprovided.
DELIME USING FLO-JUG METHOD
5. Slidethehoseclampoverendofhoseandslidehoseoverthe
maleadapterinthewaterheaterdrainopening and secure in
placeusinghoseclamp.
6. Liftcontainertothe“Pour”Positionbeingcarefultokeepthevent
in the handle above the liquid level and pour the UN•LIME into
the heater.
7. Lowercontainer,youmayhavetoplacethecontaineronitsempty
cartontopreventtheUN•LIMEfromowingbackintothecontainer.
8. LetUN•LIMEremainintheheaterfor5minutesandthenlower
thecontainertothe“Drain”Position.
9. Delimingactivityisindicatedbyfoaming on the surface ofthe
UN•LIME.Ifthereisdelimingactivity,repeatsteps6thru8.
Normally,limeremovalwillbecompletedwithinonehour.Severe
build-upoflimemaytakelongerthananhourtocompletedescaling.
Note:TocheckUN•LIMEforcontinueduse,placesomescaleorwhite
chalkinaglasswithasmallamountofUN•LIME.Ifthematerialis
vigorouslydissolvedbytheUN•LIME,itcanbereused;ifnot,the
UN•LIMEshouldbereplaced.
Ifthetemperature-pressurereliefvalveontheapplianceweepsor
dischargesperiodically,thismaybeduetothermalexpansion.You
mayhaveacheckvalveinstalledinthewaterlineorawatermeter
witha check valve. Consultyour local watersupplier or service
technicianforfurtherinformation.Donot plug the temperature-
pressurereliefvalve.
DRAINING AND FLUSHING
It is recommended that the water heater storage tank be
drained and ushed every 6 months to reduce sediment
buildup.Thewaterheatershouldbedrainedifbeingshutdown
during freezing temperatures. See Installation Considerations
inthismanualforthelocationofthewaterheatercomponents
describedbelow.
Burn harzard.
Hot water discharge.
Keep hands clear of drain
valve discharge.
TO DRAIN THE WATER HEATER STORAGE TANK:
1. TurnoffthegassupplyattheMainGasShutoffValveifthe
waterheaterisgoingtobeshutdownforanextendedperiod.
2. Ensurethecoldwaterinletvalveisopen.
3. Openanearbyhotwaterfaucetandletthewaterrununtil
thewaterisnolongerhot.
4. Closethecoldwaterinletvalvetothewaterheater.
5. Connect a hose to the water heater drain valve and
terminateittoanadequatedrain.
6. Open the water heater drain valve and allow all the water to
drainfromthestoragetank.
7. Close the water heater drain valve when all water in the
storagetankhasdrained.
8. ClosethehotwaterfaucetopenedinStep4.
9. Ifthewaterheaterisgoingtobeshutdownforanextended
period,thedrainvalveshouldbeleftopen.
TO FLUSH THE WATER HEATER STORAGE TANK:
1. Ensurethecoldwaterinletvalveisopen.
2. Openanearbyhotwaterfaucetandletthewaterrununtil
thewaterisnolongerhot.Thenclosethehotwaterfaucet.
3. Connectahose tothe drain valve and terminateit toan
adequate drain.
4. Ensure the drain hose is secured before and during the
entire ushing procedure. Flushing is performed with
systemwaterpressureappliedtothewaterheater.
5. Openthewaterheaterdrainvalvetoushthestoragetank.
6. Flushthe water heater storage tank to remove sediment
andallowthewatertoowuntilitrunsclean.
7. Close the water heater drain valve when ushing is
completed.
8. Removethedrainhose.
9. Fillthewaterheater-seeFillingTheWaterHeaterinthismanual.
10. TurnonthegassupplytothewaterheaterattheMainGas
ShutoffValve.
11. Allowthewaterheatertocompleteseveralheatingcycles
toensureitisoperatingproperly.
SERVICE
Beforecallingforrepairservice,readthe“StartUpConditions”and
“OperationalConditions”foundinthe“ForYourInformation”section
ofthismanual.
Ifaconditionpersistsoryouareuncertainabouttheoperationofthe
waterheatercontactaservicetechnician.Ifyouarenotthoroughly
familiarwithgascodes,yourwaterheater,andsafetypractices,contact
yourgassupplierorqualiedinstallertocheckthewaterheater.
Use the ”Leakage Checkpoints” guide to check a “Leaking”
waterheater.Manysuspected“Leakers”arenotleakingtanks.Often
thesourceofthewatercanbefoundandcorrected.
Readthismanualrst.Thenbeforecheckingthewaterheatermake
surethegassupplyhasbeenturned“OFF”,andneverturnthegas
“ON”beforethetankiscompletelyfullofwater.
Neverusethiswaterheaterunlessitiscompletelylledwithwater.
Topreventdamagetothetank,thetankmustbelledwithwater.
Watermustowfromthehotwaterfaucetbeforeturning“ON”gas
to the water heater.