Manual

7
OperatingInstructionsandOwner’sManualMr.Heater|PortablePropaneHeater
assembly.
11 Reinstallburnerassemblyintotheheaterhousing
12 Reinstallfuellineandcheckforleaks.
13 Installheaterbackcover.
14TheMH12HBheatershouldbestoredinanMH12HB
storagebag(notincluded).
TROUBLESHOOTING INFORMATION:
IfSparkelectrodedoesnotproducespark.
 CHECK
•Sparkelectrodebroken–replaceODS(OxygenDepletion
Sensor).
•Igniterwiremaynotbeattachedtosparkelectrode,
groundwiremaynotbeattachedtoframe-attach.
•Igniterwiredamaged–replace.
•Pulseignitionbatterydead--replacebattery
If Spark electrode producesspark butpilotdoes notlight.
 CHECK
•Nogastoheater–installdisposablecylinderorconnect
hoseandturnonvalveatremotecylinder.
•“PILOT”positionnotproperlyaligned–turngascontrol
knobto“PILOT”positionanddepress.
•Pilotisblockedfromspiderwebordirt–cleanpilot,see
MAINTENANCE.
IfPilotflamedoesnotstaylitwhenknobisreleased.
 CHECK
•Controlknobin“PILOT”positionnotcompletely
depressedorheldinlongenoughtopurgeairfromlines.
•Pilotflamenotsurroundingthermocouple–cleanpilot,
seeMAINTENANCE.
•PilotAssemblydefective–replace.
• Tipswitchwiresdisconnected–connect.
IfMainburnerdoesnotignite.
 CHECK
•Mainburnerorificeisblocked–cleanburner,see
MAINTENANCE.
IfHeaterkeepsshutting“OFF”duringnormaloperation.
 CHECK
•Pilotisblocked–cleanpilot,seeMAINTENANCE.
•Provideminimumfreshairopeningof9squareinches
(example3”x3”opening).
•Tipoverswitchactivatedfrombumpingheater.Re-light
•Regulatordefective-Replaceregulator.
•Internalcontamination-Replacecontrolvalveand
regulator.
7 Inspectandcleanmainburnerorifice(threadedinto
orificeholder).Orificeholderisattachedtotheburner
assemblyventuriwith(2)twoscrews.
8 Inspectandcleanpilot(mountedtobracket)byusinga
vacuumorapplyairpressurethroughtheholesinthe
pilotindicatedbythearrowsinFigure6.
WARNING:Neveruseneedles,wires,orsimilarcylin-
dricalobjectstocleanthepilottoavoiddamagingthe
calibratedorificethatcontrolsthegasflow.
•CallTechnicalServicesforadditionalinformation.