19 Operating Instructions and Owner’s ManualEnerco | Heatstar ERXL Series Heater
9. Aqualifiedserviceagencyshouldbecontactedforservice
otherthanroutinemaintenance.
10. Checkventterminalandfreshairinlettoseethattheyhave
notbeenblockedduringthenon-heatingseason.Ifeither
pipeisrestricted,theairswitchwon’tclose,resultingina
no-heatsituation.
Troubleshooting
CAUTION:BeforeopeningtheEner-RadiantXL
burnerdoorforanytypeofservice,besure
thegassupplyhasbeenshutoffattheheater
andtheelectricalcordfromtheburnerbox
hasbeenunplugged.
Blower Motor 1.Isthethermostatcallingforheat?Isthere
Fails to Run: 115Vattheburnerreceptacle?
2.Checkblowersidedoorforseal.Checkdoor
switch.Replaceifnecessary/
3.Checkblowerforobstructions.Replace
blowerifnecessary.
Igniter 1.Checkigniterfordamage.Replaceif
Does Not Glow: necessary.
2.Checkvoltageandresistanceatigniter.
(Voltageshouldbe115V.Resistanceshould
be40-75ohms.)
3.Checkforobstructionstotheairinletand
outlet.
4.Checkwiringandhoseconnectionstothe
airswitch.Replaceifnecessary.
5.Checkvoltagesattransformerprimaryand
secondary.Replacetransformerormoduleif
necessary.
Valve Does Not Gaspressuredownstreamofgascontrolcan
Come On: bemeasurebyusingamanometerand
connectingtopressuretaponcontrol/
1.ChecktoseeifmanualvalveheaterisON.
2.Checktoseeifmanualvalveknobonheater
gascontrolinON.
3.Supplygaspressurecanbecheckedat1/8”
NPTpressuretappingonheaterexternal
manualvalve.
4.Checktoseeifgascontrolisopening:no
manifoldpressureindicatesvalveisclosed.
Ifthevalveisclosed,eitherthegasvalveor
theignitionmoduleisfaulty.
WARNING:Donotdisconnectgroundleads
insideheater.Donotinterchangegrounded
andungroundedleadsontransformeror
ignitionmodule.
Burner Does Not 1.Checktoseeifgaslineswereproperly
Light: purgedofair.
2.Checkinletandoutletgaspressureduring
ignitionperiod.
Naturalinletpressureshouldbe4.6”
Naturaloutletpressureshouldbe3.5”
LPinletpressureshouldbe11.0”
LPoutletpressureshouldbe10.25”
3.Checkforproperorificeandairplate.
SECTION 8
Operation & Maintenance
Sequence of Operation
1. Turnthethermostatup.Whenthethermostatcallsforheat,
blowermotorwillenergize.
2. WhenthemotorapproachesnominalrunningRPM,theair
provingswitchclosesandactivatestheignitionmodule.
3. Theignitionmodulethenenergizesthehotsurfaceigniterfor
atimedwarm-upperiod(approximately45to60seconds.)
4. Afterthewarm-upperiod,thegasvalveisenergized.
5. Duringthelastpartofthesequence,theigniterisde-
energizedandisconvertedtoaflamesensingrod.
6. Ifaflameisdetected,thegasvalveremainsopen.Whenthe
callforheatissatisfied,andthesystemcontrolmechanism
de-energizestheburnerlinevoltagesupply,thegasvalvesare
turnedoff.
7. Ifnoflameisdetectedonasingle-trymodule,thegasvalve
isclosed,andthemodulewilllockoutuntilitisreset.Reset
isaccomplishedbyremovingpowerfromthemoduleforat
leastfive(5)seconds(thermostatcyclerequired.)
8. Ifnoflameisdetectedonathree-trialmodule,thegas
valveisclosed,andapurgeperiodbegins.Afterthepurge,
themoduleactstopowertheigniterforasecondwarm-
upperiod,andasecondtrialforignitionperiod.Ifflameis
stillnotestablished,athirdandfinalpurge,warm-up,and
trialcyclebegins.Afterthreetrials,themodulewilllockout
untilreset.Resetisaccomplishedbyremovingpowerfrom
themoduleforatleastfive(5)seconds(thermostatcycle
required.)
9. Onathree-trialmodule,ifflameisestablishedandlost
onthefirstorsecondtrial,thegasvalveisturnedoff,a
purge,warm-up,andtrialforignitionwilloccuronathree-
trialmodule,onlythreetrialsforignitionareallowedper
thermostatcycle.
Maintenance
Forbestperformance,thefollowingmaintenanceproceduresshould
beperformedbeforeeachheatingseason:
1. Besuregasandelectricalsupplytoheaterareoffbefore
performinganyserviceormaintenance.
2. Checkconditionofblowerscrollandmotor.Dirtanddust
maybeblownoutwithcompressedair,oravacuumcleaner
maybeused.Whenusingcompressedairdonotexceed30
psiinordertonotdamagefragilehotsurfaceigniter.
3. Checkconditionofburner.Carefullyremoveanydustor
debrisfrominsidetheburnerboxorburnercup.
4. Inspecttheigniter.Replaceigniterifthereisexcessivecarbon
residue,erosion,breakageorotherdefects.
5. Checktheinsideofthefiringtubewithaflashlight.Ifcarbon
orscalearepresent,scrapeoutthedepositswithawire
brushorrod,ormetalplateattachedtoawoodenpole.
6. Checktoseethattheburnerobservationwindowisclean
andfreeofcracksorholes.Cleanorreplaceasnecessary.
7. Checkthefluepipeforsootordirt.Aftercleaningas
necessary,re-attachthefluepipetotheheater.
8. Outsidesurfacesofheatermaybecleanedbywipingwitha
dampcloth.