Full Product Manual

Mr. Heater MH4B Operating Instructions and Owner’s Manual
4
Ablueflamethatrollsoutatthetopoftheceramictile
indicatesanaccumulationofdust,lintorspiderwebs
insidethehousingassemblyandmainburnerassembly.If
thepilotisyellowortheburnerhasanoticeableflame,
cleaningmayberequired.Usethefollowingprocedureto
inspectthecasingassemblyandmainburnerassembly.It
isnecessarytoperiodicallychecktheburnerorificeand
burnerventuritomakesurethattheyareclearofthings
suchasinsectnestsandspiderwebsthatmayaccumulate
overtime.Acloggedtubecanleadtoafire.
CLEANINGINSTRUCTIONS:
1. Allowheatertothoroughlycoolbeforeperforming
anymaintenance.
2. Removedisposable1lb.propanecylinderfrom
heater.
3. Removerightsideplasticservicepanel(ref.5)by
removingthesixscrewsholdingitinplace.
4. Inspecttheinteriorofcasingforaccumulationof
dust,lintorspiderwebs.Ifnecessary,cleanthe
interiorofthecasingassemblywithavacuumcleaner
orcompressedair(max30psi).Donotdamageany
componentswithinthecasingassemblywhenyou
arecleaning.
5. Inspectandcleanmainburner(ref.13)andorifice
(ref.3)byusingavacuumorcompressedair(max30
psi).
6. Inspectandcleanpilottube(ref.14).Inserta
doubledoverpipecleanerintothepilottubeuntil
itbottomsagainstthepilotorifice(approximately
2”).Rotatethepipecleaneracoupleoftimes
andremove.Blowouttheremainingdebrisusing
compressedair.
WARNING:Neveruseneedles,wiresorsimilarcylindrical
objectstocleanthepilottoavoiddamagingthe
calibratedrubythatcontrolsthegasflowthroughthe
pilotorifice.
7. Applycompressedair(max30psi)intotheceramic
tileofburnerassemblyandventuritube(ref.13)to
removedust,lintandspiderwebs.
8. Reinstalltherightsideplasticservicepanel.
LIGHTING / OPERATING INSTRUCTIONS
WARNING: Alwaysinspectpropanecylinderandheater
propaneconnectionsfordamage,dirt,anddebrisbefore
attachingpropanecylinder.Donotuseifheadofcylinderis
damaged,puncturedordeteriorated.
ALWAYSATTACHORDETACHCYLINDEROUTDOORS
AWAYFROMFLAMES,OTHERIGNITIONSOURCES,AND
ONLYWHENHEATERISCOOLTOTOUCH.NEVERSMOKE
WHENATTACHINGORREMOVINGPROPANECYLINDEROR
MAKINGREMOTECONNECTIONS!
• UseonlyLP-gascylindersmarkedinaccordancewiththe
U.S.Dept.ofTransportation(DOT).
• Useonly16.4oz.(1lb.)disposablecylindersthatmate
withNo.600valveconnection.
• Heaterandattachedcylindermustbeinanupright
positionduringoperation.
• Screw1lb.disposableLP-gassupplycylinderclockwise
(frombottom)intoportableheateruntilhand-tightand
fitcylinderintostand.Donotusethreadsealantonthis
connection.
• Checkcylinderconnectionforleakswithsoapywater
atthethreadedconnectionunderthedomedplastic
coverwherethecylinderscrewsintotheregulator.SEE
WARNING!ONPLASTICCOVER.
• Depress“ON”buttontolightpilotflame(repeatuntil
pilotlights)andcontinuetoholdfor30-60seconds.
• Afterlightingpilot,release“ON”buttontolightheater.
• Toshutoffheater,pressthe“OFF”button.
• CAUTION: Afterturningheateroff,wireguardwill
remainhot.Allowtothoroughlycoolbeforestoring.
• Donotoperate,storeorremovecylindernear
flammableitemsorignitionsources.
• LP-GASCYLINDERSMUSTBEDISCONNECTEDFROM
HEATERWHENNOTINUSE!
MAINTENANCE:
Alwayskeeptheheaterareaclearandfreefrom
combustiblematerials,gasolineandotherflammable
vaporsandliquids.
Keeptheventareas(slotsinthebottomandtopofthe
heater)clearatalltimes.
Visuallyinspectthepilotflameandburnerperiodically
duringuse.Thepilotflameshouldbeblueincolor(not
yellow)andwillextendtothethermocouple.Theflamewill
surroundthethermocouplejustbelowthetip,seeFigure2.
Aslightyellowflamemayoccurwherethepilotflame
andmainburnerflamemeet.Theburnershouldbebright
orange(withaslightbluecoloraroundtheborder,ared-
orangehazethatisvisibleontheceramictileisacceptable)
andwithoutanoticeableflame.
Pilot Flame
Oxygen Depletion Sensor
Figure 2