MH38QFA User Manual

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Forced Air Propane Construction Heater Operating Instructions and Owner’s Manual

OPERATING PRECAUTIONS

Thisisapropane,direct-fired,forcedairheater.It'sintendeduse

isprimarilytemporaryheatingofbuildingsunderconstruction,

alterationorrepair.

Propaneisheavierthanair.Ifpropaneleaksfromaconnectionor

fitting,itsinkstothefloor,collectingtherewiththesurrounding

air,formingapotentiallyexplosivemixture.Obviously,propane

leaksshouldbeavoided,sosetupthepropanesupplywithutmost

care.ReadenclosedOdorFadeandPropaneSheetforadditional

informationaboutdetectingpropaneleaks.Leakchecknew

connectionsorreconnectionswithasoapandwatersolutionand

followallconnectioninstructionsherein.Also,askyourpropane

dealerforadviceonthepropaneapplicationandsupplyinstallation

andaskhimtocheckitifthereareanyquestions.

Thisheaterwasdesignedandcertifiedforuseasaconstruction

heaterinaccordancewithANSIStandardZ83.7/CGA2.14.Check

withyourlocalfiresafetyauthorityifyouhaveanyquestionsabout

yourapplications.Otherstandardsgoverntheuseoffuelgases

andheatproductingproductsinspecificapplications.Yourlocal

authoritycanadviseyouaboutthese.

Direct-Firedmeansthatallofthecombustionproductsenterthe

heatedspace.Eventhoughthisheateroperatesverycloseto100

percentcombustionefficiency,itstillproducessmallamountsof

carbonmonoxide.Carbonmonoxide(calledCO)istoxic.Wecan

toleratesmallamountsbutnotalot.COcanbuildupinaheated

spaceandfailuretoprovideadequateventilationcouldresultin

death.Thesymptomsofinadequateventilationare:

 •headache

 •dizziness

 •burningeyesandnose

 •nausea

 •drymouthorsorethroat

So,besuretofollowadviceaboutventilationintheseoperating

instructions.

ForcedAirmeansthatablowerorfanpushestheairthroughthe

heater.Propercombustiondependsuponthisairflow;therefore,

theheatermustnotberevised,modifiedoroperatedwith

partsremovedormissing.Likewise,safetysystemsmustnotbe

circumventedormodifiedinordertooperatetheheater.

Whentheheateristobeoperatedinthepresenceofotherpeople

theuserisresponsibleforproperlyacquaintingthosepresentwith

thesafetyprecautionsandinstructions,andofthehazardsinvolved.

SAFETY PRECAUTIONS

1. Checktheheaterthoroughlyfordamage.DONOToperatea

damagedheater.

2. DO NOTmodifytheheateroroperateaheaterwhichhasbeen

modifiedfromitsoriginalcondition.

3. Useonlypropanegas.

4. UseonlyVAPORWITHDRAWALpropanesupply.Ifthereisany

questionaboutvaporwithdrawal,askyourpropanedealer.

5. Mountthepropanecylindersvertically(shutoffvalveup).

Securethemfromfallingorbeingknockedoverandprotect

themfromdamage.

6. Locatepropanecontainersatleast(USA)7ft.(2.13m),

(Canada)10ft.(3m)fromtheheateranddo notdirect

exhausttowardcontainers.

7.  IMPORTANTUseonlythehoseandregulatorassembly

providedwiththeheater.Matchthecolorstripeonthehang

tagattachedtothehoseassemblywiththecoloronthelabel

locatednearthepropaneinletfittingontheheater.Inspect

hoseassemblybeforeeachuseoftheheater.Ifthereis

excessiveabrasionorwear,orhoseiscut,replacewithhose

assemblylistedonpartslistbeforeusingheater.

8. Forindooruseonly.Areamustbewellventilated.Provide

minimumopeningsof1/2sq.ft.(.046m²)nearthefloor

and1/2sq.ft.(.046m²)neartheceiling(alsosee"Operating

Precautions").

9. Ifatanytimegasodorisdetected,IMMEDIATELY

DISCONTINUEoperationuntilthesourceofgashasbeen

locatedandcorrected.ReadenclosedOdorfadeandPropane

Sheetforadditionalinformationaboutdetectingpropaneleaks.

10. Installtheheatersuchthatisisnotdirectlyexposedtowater

spray,rainand/ordrippingwater.

11. Maintainminimumclearancefromnormalcombustiblematerial

(likepaper)asfollows:floor-0ft.(0m);outlet-6ft.(1.83m);

sides-2ft.(.61m);top-6ft.(1.83m).Locate10ft.(3m)from

canvasorplastictarpaulinsorsimilarcoveringsandsecurethem

topreventflappingormovementduetowindaction.

12. Duetothehighsurfaceandexhausttemperatures,adultsand

childrenmustobserveclearancestoavoidburnsorclothing

ignition.

13. Operateonlyonastable,levelsurface.

14. Donotusewithductwork.Donotrestrictinletorexit.

15. Useonlytheelectricalpowerspecified.Theelectrical

connectionandgroundingmustcomplywithNationalElectrical

Code-ANSI/NFPA70(USA)andCSAC22.1CanadianElectrical

Code,Part1(Canada).

16. Useonlyaproperlygrounded3-prongreceptacleorextension

cord(6ft(1.83m)inlengthminimum).

17. Donotmove,handleorservicewhilehotorburning.

18. Useonlyinaccordancewithlocalcodesor,intheabsenceof

localcodes,withtheStandardfortheStorageandHandling

ofLiquefiedPetroleumGasesANSI/NFPA58andCSAB149.1,

NaturalGasandPropaneInstallationCode.

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Mr. Heater MH38QFA

User Manual - Page 3