MrHeater MH40NG Assembly instructions

Installer: Leave this manual with the appliance. Consumer: Retain this manual for future reference.
If the information in this manual is not followed exactly, a fire or explosion
may result causing property damage, personal injury or loss of life.
WARNING:
— Donotstoreorusegasolineorotherflammablevaporsandliquidsinthevicinityofthisorany
otherappliance.
— WHATTODOIFYOUSMELLGAS
 • Shutoffgassupply
 • DO NOTtrytolightappliance
 • DO NOTuseelectricalswitches
 • DO NOTuseanytelephoneinyourhouse.Immediatelycallyourlocalgassupplierfroma
  telephoneremotefromtheareaoftheleak.Followthegassupplier’sinstructions.
 • DO NOTtouchanyelectricalswitch;donotuseanyphoneinyourbuilding.
 • Installationandservicemustbeperformedbyaqualifiedinstaller,serviceagencyorthegas 
supplier.
 • Ifyoucannotreachyourgassupplier,callthefiredepartment
Thisisanunventedgas-firedportableheater.Itusesair(oxygen)fromtheareainwhichitisused.
Adequatecombustionandventilationairmustbeprovided.Refertopage5.
WARNING: Improperinstallation,adjustment,alteration,serviceormaintenancecancausepropertydam-
age,injuryordeath.Readtheinstallation,operation,andmaintenanceinstructionsthoroughlybeforeinstallingor
servicingthisheater.Forassistanceoradditionalinformationconsultaqualifiedinstaller,serviceagency,orgas
supplier.
OPERATING INSTRUCTIONS
AND OWNER’S MANUAL
MODEL#
MH40NG
MH40LP
READ INSTRUCTIONS CAREFULLY:Readandfollowallinstructions.Placeinstructionsinasafeplace
forfuturereference.Donotallowanyonewhohasnotreadtheseinstructionstoassemble,light,
adjustoroperatetheheater.
Gas Fired Infrared Space Heater
18682
www.mrheater.com • 800-251-0001

2Installation Instructions and Owner’s Manual
Gas Fired Infrared Space Heater
TABLE OF CONTENTS
1.GENERALINFORMATION........................................................ 3
2.CLEARANCES.......................................................................... 3
3.SUSPENSION.......................................................................... 4
4.GASSUPPLY............................................................................ 4
5.PIPINGREQUIREMENTS.......................................................... 4
6.GASPRESSURE....................................................................... 4
7.ELECTRICAL............................................................................. 4
8.THERMOSTAT&LOCATION..................................................... 4
9.VENTILATION.......................................................................... 5
10.START-UPPROCEDURE.......................................................... 5
11.HEATERSHUTDOWN............................................................. 5
12.OPERATORMAINTENANCEINSTRUCTIONS........................... 5
13.REPLACINGTHEGASVALVEUNIT......................................... 6
14.FREQUENCYOFOPERATORCHECKS..................................... 6
15.REPLACEMENTPARTSLIST.................................................... 7
16.WARRANTY........................................................................ 8
WARNING: Improperinstallation,adjustment,altera-
tion,serviceormaintenancecancausepropertydamage,injuryor
death.Readtheinstallation,operation,andmaintenanceinstruc-
tionsthoroughlybeforeinstallingorservicingthisequipment.For
assistanceoradditionalinformationconsultaqualifiedinstaller,
serviceagency,orgassupplier.
WARNING: Whenusedwithoutfreshair,heatermay
giveoffCARBONMONOXIDE,anodorlesspoisonousgas.OPEN
WINDOWANINCHORTWOFORFRESHAIRWHENUSINGTHIS
HEATER.
WARNING: ThisheaterisequippedwithaPILOTLIGHT
SAFETYSYSTEM.DONOTTAMPERWITHPILOTLIGHTSAFETY
SYSTEM.
WARNING: Ifheatershutsoff,donotrelightuntilyou
providefreshair.Ifheaterkeepsshuttingoff,haveitserviced.
Keepburnerandcontrolclean.Opendoorfor5minutes.
MaintainclearancesasshowninTable1oronheaternameplate.
•DONOTUSEMATCHOROTHERFLAMEFORLEAKTESTING.
•DONOTEXCEED1/2PSIINLETPRESSURETOHEATER.
WARNING: Fuelsusedinliquefiedpropanegasappli-
ances,andtheproductsofcombustionofsuchfuel,canexpose
youtochemicalsincludingbenzene,whichisknowntothestate
ofCaliforniatocausecancerandcausebirthdefectsorother
reproductiveharm,formoreinformationgoto
www.P65Warnings.ca.go
DANGER:
CARBONMONOXIDEPOISONINGMAYLEADTODEATH.
CARBON MONOXIDE POISONING:
Earlysignsofcarbonmonoxidepoisoningresembletheflu,
withheadaches,dizziness,ornausea.Ifyouhavethesesigns,
theheatermaynotbeworkingproperly.Getfreshairatonce!
Haveheaterservice.Somepeoplearemoreaffectedbycarbon
monoxidethanothers.Theseincludepregnantwomen,person
withheartorlungdiseaseoranemia,thoseundertheinfluence
ofalcohol,andthoseathighaltitudes.
CAUTION:
•Neverconnectgasvalveorthermostattolinevoltageoratrans-
former.
•Iftheinfra-redcolorofthegridbecomesdullwhenthebuilding
furnaceisoperating,consultgassupplieroncorrectgassupply
pipingsizes.
•Thisheaterisforindoorinstallationonly!
NOTE:Gasketbindermaterialusedinthisheaterassemblywill
temporarilyemitanodorand/orvapor.Thisconditionwillclear
upinapproximately20minutesandthereafterwillnotreoccur.
Refertopage5forventilation.
WARNING: THISPRODUCTCANEXPOSEYOUTO
CHEMICALSINCLUDINGLEADANDLEADCOMPOUNDS,WHICH
AREKNOWNTOTHESTATEOFCALIFORNIATOCAUSECANCER
ANDBIRTHDEFECTSOROTHERREPRODUCTIVEHARM.FOR
MOREINFORMATIONVISITWWW.P65WARNINGS.CA.GOV

3Installation Instructions and Owner’s Manual
Gas Fired Infrared Space Heater
1. GENERAL INFORMATION
a. Yourheatercomesfullyassembledandistestedatthefactory
forpropergasandinputasstatedonthenameplate.
b. Beforeproceedingwiththeinstallation,besuretoinspectfor
damages.Freightcompanymustbenotifiedofanydamages
andrequestthattheinspectionbemade.MR.HEATERwill
sendreplacementpartsfordamagedpartsonlyafterreceiving
asignedinspectionreporttoprovetheliabilityofthefreight
company.
c. Donotattempttooperateheaterwithanyothergasthanthat
indicatedontheheaternameplate.
d. Theinstallationofheatermustconformwithlocalbuilding
codes,orinabsenceoflocalcodes,withtheNationalFuelGas
Code,ANSIZ223.1a/NFPA54,andStandardforStorageand
HandlingofLiquefiedPetroleumGases,ANSI/NFPA58.
e. CanadianinstallationsmustcomplywithCAN/CGA-B149.1.2
GasCodewhichcanbepurchasedfromtheCSA(Canadian
StandardsAssociation)website@http://www.csa.caorby
calling1-800-463-6727.
f. Plugged1/8”N.P.T.TestGageConnectionislocatedonthe
HeaterGasValveora¼1/4”N.P.T.Connectionislocatedonthe
outsideoftheCastVenturi.
g. Forindoorinstallationonly.Notforuseinresidentialdwellings.
NOTE:Aresidentialdwellingisadomicileintendedforuseby
oneormorepersonsandthatincludesoneormoreareas,
suchasthoseusedforcooking,eating,living,sleeping,ora
sanitaryfacility.Aresidentialdwellingdoesnotincludeanat-
tachedanddetachedgarage,workshop,oroutdoors.
For additional information, contact;
MR.HEATERCORPORATION
CUSTOMERSERVICEDEPT.
CLEVELAND,OHIO
1-800-251-0001
*ThefollowingextraNFPAmanualsarehelpfulwheninstalling
MR.HEATERinalocationnotanticipatedinthismanual:
Number Related Subject
NFPA88  ClearancestoCombustibleSurfaces
NFPA409 ClearancestoCombustibleSurfaces
DONOTEXCEED½PSIINLETPRESSURETOHEATER
2. CLEARANCES
Minimumclearancestocombustibles(RefertoTable3)..Also
betweencontrolendofheaterforservicingandminimumontop
andsidesforventilationandcombustionairsupply.
Aminimumclearanceof8’abovefloorforpublicgaragesin
accordancewithANSI/NFPANo.409mostrecentedition,orTable
3;thelargerdimensionofANSI/NFPANo.409orTable3istobe
used.
*WhenselectinginstallationlocationsforMR.HEATERensurethat
theopeningofanyexteriororinteriordoorsorwindowswillnot
violateclearancesorcontactanyheatercomponents.
Table 1. BTU Ratings and Supply Pressures
MODEL BTU/HR. RATING GAS SUPPLY PRESSURE (W.C.) ORIFICE
NO. GAS MIN. MAX. MANIFOLD SIZE
NATURAL PROPANE NAT. L.P. NAT. L.P. NAT. L.P. NAT. L.P.
MH/HS40NG 40,000 — 6.8” W.C. — 14” W.C. — 5.8” — 37 —
MH/HS40LP — 40,000 — 11” W.C. — 14” W.C. — 10” — 50
Table 2. Heater Dimensions and Orice Sizes
MODEL OPERATING ORIFICE SIZE INPUT SIZE
NO. PRESSURE BURNER PILOT BTU/H WIDTH LENGTH HEIGHT WEIGHT
MH/HS40NG 6.8”w.c. 37 .012 40.000 19-1/4” 30-1/4” 12” 25 lbs.
MH/HS40LP 10”w.c. 50 .009 40,000 19-1/4” 30-1/4” 12” 25 lbs.
Table 3. Installation, Ventilation and Mounting Information
BTU/HR. RATING NORMAL
MODEL GAS MOUNTING CLEARANCES TO COMBUSTIBLE SURFACES
NO. NAT. L.P. POSITION TOP SIDES BACK BELOW
MH/HS40NG 40,000 —  HORIZ-30˚ 34” 30”  30”  68”
MH/HS40LP — 40,000  HORIZ-30˚ 34” 30”  30”  68”

4Installation Instructions and Owner’s Manual
Gas Fired Infrared Space Heater
3. SUSPENSION
Heaterhasfourmountingholes,twooneachend,forattaching
rod,chain,orangleironbracketsandshallbesafelyand
adequatelyfixedinpositionindependentofgasandelectricsupply
lines.
4. GAS SUPPLY
Provideadequategassupplyforratedinputofeachheaterusing
AmericanStandardInstallationofgaspipingandgasappliances
inbuilding.ANSIZ223.1a/NFPA54pamphlet,TableC-3shows
capacityofpipeofdifferentdiametersandlengthsincubicfeet
perhournaturalgaswithpressuredropof0.3inches,specific
gravityof0.60.ForliquefiedPetroleumGas(LP)capacityrefer
toFigures3.Onthreadedpipesuseapipecompoundwhichis
resistanttotheactionofallgases.
Ifgaslinesaretobepressuretestedwithcompressedair,
disconnecteachheatertopreventcontroldamageandcap
outlets.Afterreconnectingallheaters,purgegaslinesofair
andcheckallconnectionsforleaksusingsoapsolution.Liquid
dishwashingdetergentisanexcellentleakdetector.
5. PIPING REQUIREMENTS
Allpipinginstalledmustcomplywithlocalcodesandordinances
orwiththeNationalFuelGasCode,ANSIZ223.1(NFPA54),
whichevertakesprecedence.Wheninstallingpiping,thefollowing
requirementsmustbetakenintoconsideration:
• Usenewproperlyreamedblackpipefreefromchips.
• Applyagoodqualitypipecompoundtoallmalethreadsprior
toassembly.IfL.P.gasisthefuel,ensurethatpipecompound
isresistanttoL.P.gas.DONOTUSETEFLON™tape.
• Priortoinstallation,applypipecompoundtoallmalethreads
asshowninFigure1.
USE MODERATE AMOUNT OF PIPE DOPE
LEAVEFIRST2THREADSBARE
Figure 1. Pipe Compound Application
• Malethreadsonpipetobeinstalledintogasvalveshallmeet
therequirementsofFigure2.Threadslongerthanthose
showninthefiguremaycausegasvalvedistortionandmal-
function.
• AsedimenttrapmeetingthetypicalrequirementsofFigure3
shallbeinstalledinthelinetothegasvalve.
• Adedicatedshutoffvalvefortheheatermustbeinstalledin
thegassupplyline.
3/4¾”MAXIMUMTHREADLENGTH
 ½”BLACKPIPE
GASVALVEBODY
½”MAXIMUMDEPTHOFINSERTS
INTOGASVALVE
NOTE:
1.OnlyUseAPipeCompoundWhichIsResistantToLiquefied
GasesOnL.P.Installations.
2.FittingsShownAreNotIncludedWithHeater.
Figure 3. Typical Piping Installation
6. GAS PRESSURE
Whenahigherthanthemaximumrecommendedgaspressureis
beingmaintainedatthemaingasline,aseparateregulatormust
beinstalledaheadoftheheater.RefertoTable1onpage3for
maximumallowablepressureforstatedheatermodelandgas.
Seeheaterratingplateforminimumgassupplypressure“Forthe
PurposeofInputAdjustment.”
Onamultipleheaterinstallationinmaybepossibletouseone
largecapacityregulatororanindividualregulatorforeachheater.
Nevertheless,itisrecommendedpracticetomaketheentirepipe
systemaloop.
Contactyourlocalrepresentativeorthefactoryforpropergas
pressurereducingdesignstage.
7. ELECTRICAL
NEVERCONNECTPOWERPILEGASVALVEORTHERMOSTATTO
LINEVOLTAGEORATRANSFORMER.
8. THERMOSTAT & LOCATION
Makesurethattheelectricalcharacteristicsofthethermostat
matchthoseoftheheatercontrols.Forbestresultsthermostat
shouldbepositioned5ft.abovefloorwhereaircancirculate
freelyaroundit.DO NOT MOUNT directly to cold-side wall, in
direct drafts, or directly beneath the infra-red heater.
Ensurethattheselectedthermostatlocationmeetsallofthe
aboverequirements.Refertotheinstructionsthatcomewith
thethermostatforadditionalgeneralinformationandmounting
instructions.
Ifthewallisofstudandwallboardconstruction,thenusethe#6
by1inchsheetmetalscrews,includedwiththethermostat,and
mountthethermostatintheselectedlocation.
Ifwallisbrickormasonry,theappropriateanchorsmustbe
obtainedtoaccommodatethethermostatmountingscrews.Use
thebackplateofthethermostatasatemplatetomarkthehole
location,drillappropriatesizeanchorholes,installtheanchorsand
securelyattachthethermostatusingthemountingscrews.
ConnectthethermostatwirestogasvalveasshowninFigure4.
Figure 2.
Gas valve
connection
requirements
Sedimenttrap

5Installation Instructions and Owner’s Manual
Gas Fired Infrared Space Heater
Figure 4 connection diagram
9. VENTILATION
a. Theminimumintakeandexhaustairopeningsshallprovide
fornotlessthan400CFMforevery100,000BTUinputexcept
thattheinfiltrationareamaybeincludedintheintakearea.
b. Wherenatural(gravity)ventilationisprovidedforexhaust,the
openingsmustbedistributedabovetheheaters(preferablyat
thepeakoftheroof)andtheareasofopeningsshallnotbe
lessthan300squareinchesforevery100,000BTUinput.
Figure 5. Thermostate controls
10. START-UP PROCEDURE
OPENTHEGASSUPPLYVALVEORVALVES
SetthethermostattotheOFFposition.SeeFigure5.Ifthe
manualgascontrolknobonthegasvalveisnotintheOFF
position,partiallydepresstheknobandrotatetotheOFFposition.
SeeFigure6.
Wait5minutestoallowgasthatmayhaveaccumulatedinthe
mainburnertoescape(especiallyimportantafterinstallation).
TurnthemanualgascontrolknobtothePILOTposition.
Depressthemanualgascontrolknob.Usingamatch,lightthe
pilotlight.SeeFigure6.Holdtheknobdownforapproximately
30secondstoallowanyairingaslinestopassthroughpilotand,
oncethepilotislit,allowthethermocoupletoheatupenoughto
MANUALGAS
CONTROLKNOB
WRENCH
BOSS
GASINLET
PRESSUREREGULATOR
ADJUSTMENT
STANDARD
PRESSURE
REGULATOR
(Incomingpressure
notexceed14”W.C.)
PILOTGAS
OUTLET
(PRESSURE
TAPPING
DIRECTLY
BENEATH)
PILOTFLOW
ADJUSTING
SCREW
(BENEATH
COVERSCREW)
PILOTSTATPOWER
UNIT
Figure 6. Gas Valve
Components
activatethesafetyvalveinanopenposition.
ReleasemanualgascontrolknobandturntoON.Reset
thermostattodesiredtemperature.
NOTE:
DuringtheinitialstartupofMR.HEATERanodorand,perhaps,
somevaporwillcomefromtheheater.Thisisthegasketbinding
materialemittingthisodorand/orvapor.Afterapproximately20
minutesthisodorwilldisappearandnotoccuragain.
11. SHUTDOWN
1. TurnthermostattoOFF.
2. TurnmanualgascontrolknobongasvalvetoPILOTposition.
3. PartiallydepressknobandrotatetotheOFFposition.
4. Closegassupplyvalves.
12. OPERATOR MAINTENANCE
INSTRUCTIONS
1. TROUBLESHOOTING
a. Table4liststhecommonmalfunctionswhichyoumayfind
duringtheoperationormaintenanceofyourheater.
b. ForadditionalinformationrefertoHoneywellFieldBulletin
enclosedintheheatercarton.
c. Intheevent,resultscannotbeobtainedafterperformingall
listedsolutions,callyourMr.Heaterdealer,orthefactory
customerservicedepartmentat1-800-251-0001.
2. ADJUSTING THE PILOT FLAME
Thepilotflameshouldenvelope3/8to½in.(10to13mm)ofthe
tipofthethermocoupleorgenerator.Toadjustthepilotflame,
refertoFigure7.
a. Removepilotadjustmentcoverscrew.RefertoFigure8.
b. Turninneradjustmentscrewclockwisetodecreaseorcounter-
clockwisetoincreasepilotflame.
THERMOCOUPLE
PROPERFLAMEADJUSTMENT
3/8TO½INCH
(10TO13MILLIMETERS)
Figure 7. Proper flame adjustment
POWERPILEGASVALVE
POWERPILEGENERATOR
WIRE
SIZES
MAXIMUM
LENGTH
2WIRE
CABLE
NO.18
NO.16
NO.14
15FEET
30FEET
50FEET
CAUTION:
Neverconnectpowerpilegas
valveorthermostattolinevoltage
oratransformer
FactoryWired
ThermostatWires

6Installation Instructions and Owner’s Manual
Gas Fired Infrared Space Heater
c. Alwaysreplacecoverscrewafteradjustmentandtightenfirmly
toensureproperoperation.
Manualgas
controlknob
Wrench
boss
Gas
inlet
Pilotstat
powerunit
Pressureregulator
adjustment(beneath
coverscrew)
Installlong
screwin
outsidecorner
Standard
pressure
regulator
(“A”model)
Step
opening
regulator
(“C”model)
Pilotgas
outlet
(pressure
tapping
directly
beneath)
Pilotflowadjustingscrew
(beneathcoverscrew)
Figure 8. Top view of standard capacity gas control.
TABLE 4. TROUBLESHOOTING CHART
Belowinchartformarevarioussymptomsofamalfunctioningsystem,possibledefectsthatwillcausethere
symptomsandsuggestedcorrectivemeasure.Thechartassumesthatthepropergaspressureisavailabletothe
heaterandthatthelightingprocedureisasstatedontheplateattachedtotheheater.
SYMPTOMS CAUSES SOLUTIONS
Burnerlightoffveryslow Partiallyblockedpilotorifice Re-adjustpilot
 Pilotoutofadjustment Replace
Burnerlightoffveryslowly Partiallyblockedburnerorifice Replace
Colorstaysdull 
Burnerflashback Lowgaspressure Correctlinepressureorcallyourgas
(roaringnoiseduringoperation  supplier
andceramicgridsurfacewillbedark) Damagedburner Replace
Ceramicgridorburnersootingup
(whenneworaftercleaning) Firstcheckfordamaged Replaceifdamaged
 burnerorifice
 Ifburnerorificeisnotdamaged
 thencheckfordamagedmanifold. Replace
Pilotcannotbeignited Blockedpilotorifice Replace
 Gascocknotinposition
 Pilotgasflowadjustmentscrewmaybeclosed Gascontrolknobmustbeturnedtopilot
  andhelddepressed
  Openandadjust(seeFigure8)
Pilotlightsbutgoesout Defectivethermocouple Replace
 Defectivecontrol Replace
Pilotstayslitbutmainburnerwillnotlight Loosewireorimproperlywired Tightenconnections,checkwiring
 Defectivecontrol diagram
 Blockedburnerorifice Replace
  Cleanorificeorreplace
Failuretoignite Maingasoff Openmanualvalves
 Airingasline Bleedgasline
 Loosewireconnections Tightenwireconnections
 Dirtywireconnections Cleanterminalsandsecureterminals
13. REPLACING THE GAS VALVE UNIT
a. Removethetwogasvalveunitwiresatthegascontrolvalve
labeled“PP.”
b. Unscrewgasvalvefromgaspiping.
c. Reconnectgasvalveandunitwirestoterminals“PP.”Besure
toleavethermostatwireononeterminal.
14. FREQUENCY OF OPERATOR CHECKS
Intermittent Use
Appliancesthatareusedseasonallyshouldbecheckedbefore
shutdownandagainbeforethenextuse.
Dusty,wetorcorrosiveenvironment.Sincetheseenvironments
cancausethegascontroltodeterioratemorerapidly,thesystem
shouldbecheckedmoreoften.
The gas control should be replaced if:
a. Itdoesnotperformproperlyoncheckoutortroubleshooting.
b. Thegascontrolknobishardtoturnorpushdown,oritfails
topopbackupwhenreleased.
SYMPTONS CAUSES SOLUTIONS
Burnerlightoffveryslow Partiallyblockepilotorifice
Pilotoutofadjustment
CleanorReplace
Re-adjustpilot
Burnerlightoffveryslow&color
staysdull
Partiallyblockedburnerorifice Cleanorreplace
Burnerflashback(roaringnoise
duringoperationandceramicgrid
surfacewillbedark)
Lowgaspressure
DamagedBurner
Correctlinepressureorcallyourgassupplier
Replace
Ceramicgridorburnersootingup
(whenneworaftercleaning)
Firstcheckfordamageburnerorifice,if
burnerorificeisnotdamagedthencheckfor
damagedmanifold.
Replaceifdamaged
Pilotcannotbeignited Blockedpilotorifice
Gasvalveknobnotincorrectposition
Pilotgasflowadjustmentscrewmaybeclosed
Cleanorreplace
Gasvalveknobmustbeatpilotandheld
depressed
Openandadjust(seeFigure8)
Pilotlightsbutgoesout Defectivethermocouple
Defectivecontrol
Replace
Replace
Pilotstayslitbutmainburnerwill
notlight
Loosewireorimproperlywired
Defectivecontrol
Blockedburnerorifice
Tightenconnections,checkwiringdiagram
Replace
Cleanorreplace
Failuretoignite Maingasoff
Airingasline
Loosewireconnections
Dirtywireconnections
Openmanualvalvesongasline
Bleedgasline
Tightenwireconnections
Cleanandsecureconnectionterminals
15. HIGH-ALTITUDE OPERATION
Installationofthisapplianceataltitudesabove2,000ft(610m)
shallbeinaccordancewithlocalcodes,orintheabsenceof
localcodes,theNationalFuelGasCode,ANSIZ223.1/NFPA54or
NationalStandardofCanada,NaturalGasandPropaneInstallation
Code,CSAB149.1.

7Installation Instructions and Owner’s Manual
Gas Fired Infrared Space Heater
1 2
56
10 9
11
7 8
12
13
4
3
ITEM NO STOCK NO DESCRIPTION
100024 GAS-VALVE-NATURALGAS
200025 GASVALVE-PROPANEGAS
300434A REFLECTORASSEMBLY
402523A BURNERASSEMBLY
505574 ORIFICE–PILOTNATURALGAS
605573 ORIFICE–PILOTPROPANEGAS
705450 ORIFICEBURNER-PROPANEGAS
805437 ORIFICE–BURNERNAT.GAS
909360 THERMOCOUPLE-GENERATOR
ITEM NO STOCK NO DESCRIPTION
10 10367 THERMOSTAT
11 11406 PILOTBURNERNATURALGAS
-114 0 5 PILOTBURNERPROPANE
12 17374 CHAINKIT
13 F114581 HEATERHANGERKIT
OPTIONAL CONVERSION KITS:
- 00286A LPtoNGConversion
- 00285A NGtoLPConversion
MH40 REPLACEMENT PARTS LIST
OPTIONAL DECORATIVE GRID KIT
STOCK NO. DESCRIPTION STOCK NO. DESCRIPTION
F204440 GridKit(Grid,Screws,RetentionClip) F204441 RetroFitGridKit(Reflector,Grid,Screws,RetentionClip)

8Installation Instructions and Owner’s Manual
Gas Fired Infrared Space Heater
Mr.Heater,Inc.reservestherighttomakechangesatanytime,withoutnoticeor
obligation,incolors,specifications,accessories,materialsandmodels.
WARNING:
USEONLYMANUFACTURER’SREPLACEMENTPARTS.USEOFANYOTHERPARTS
COULDCAUSEINJURYORDEATH.REPLACEMENTPARTSAREONLYAVAILABLE
DIRECTFROMTHEFACTORYANDMUSTBEINSTALLEDBYAQUALIFIEDSERVICE
AGENCY.
PARTS ORDERING INFORMATION:
PURCHASING: AccessoriesmaybepurchasedatanyMr.Heaterlocaldealeror
directfromthefactory
FOR INFORMATION REGARDING SERVICE
PleasecallToll-Free800-251-0001
www.mrheater.com
Ourofficehoursare8:00AM–5:00PM,EST,MondaythroughFriday.
Pleaseincludethemodelnumber,dateofpurchase,anddescriptionofproblemin
allcommunication.
LIMITED WARRANTY
Mr.Heater,Inc.warrantsitsheatersandaccessoriestobefreefromdefectsinmate-
rialandworkmanshipforaperiodof1yearfromdateofpurchase.Mr.Heater,Inc.
willrepairorreplacethisproductfreeofchargeifithasbeenproventobedefective
withinthe1-yearperiod,andisreturnedatcustomerexpensewithproofofpur-
chasetoMr.Heater,Inc.withinthewarrantyperiod.
ENERCOGROUP,INC.,4560W.160THST.,CLEVELAND,OHIO44135•800-251-0001
Mr.HeaterisaregisteredtrademarksofMr.Heater,Inc.
©2021,Mr.Heater.Allrightsreserved
®
OPERATING INSTRUCTIONS
AND OWNER’S MANUAL
MODEL#
MH40NG
MH40LP
READ INSTRUCTIONS CAREFULLY:Readandfollowallinstructions.Placeinstructionsinasafeplace
forfuturereference.Donotallowanyonewhohasnotreadtheseinstructionstoassemble,light,
adjustoroperatetheheater.
PRODUCTREGISTRATION:Thankyouforyourpurchase.
Pleaselogintohttp://www.egiregistration.comtoregisteryourproduct.

Instalador: deje este manual junto con el artefacto. Consumidor: conserve este manual para referencia futura.
Si no se siguen al pie de la letra las instrucciones de este manual, podría
producirse un incendio o una explosión que provocaría daños materiales,
lesiones o muertes
ADVERTENCIA:
— NoalmaceneniutilicegasolinaniningúnotrovapornilÃquidoinflamablecercadeestenideningúnotro
artefacto.
—QUÉHACERSIDETECTAOLORAGAS
 • Cierreelsuministrodegas.
 • Nointenteencenderelartefacto.
 • Notoqueningúninterruptoreléctrico;nouseelteléfonodentrodeledificio.
 • Llameinmediatamentealproveedordegasdesdeelteléfonodeunvecino.
 Sigalasinstruccionesdelproveedordegas
 • Sinopuedecomunicarseconelproveedordegas,llamealdepartamentodebomberos
—Lainstalaciónylasreparacionesdebenserrealizadasporuninstalador,unaagenciadereparaciónoun
proveedordegascalificados
Estecalentadorportátilagasnotieneunafuentepropiadeventilación.Utilizaelaire(oxígeno)deláreaenla
cualseemplea.Debesuministrarseelairenecesarioparalaventilaciónylacombustión.Consultelapágina5.
ADVERTENCIA:
Lainstalación,elajuste,laalteración,lasreparacionesoelmantenimientoinadecuadospuedenprovocardaños
materiales,lesionesomuertes.Leacuidadosamentelasinstruccionesdeinstalación,usoymantenimientoantes
deinstalarorepararestecalentador.Paraobtenerasistenciaoinformaciónadicional,consulteconuninstalador,
unaagenciadereparaciónounproveedordegascalificados.
INSTRUCCIONES DE USO Y
MANUAL DEL USUARIO
MODELO
MH40NG
MH40LP
ADVERTENCIA:Leaysigacuidadosamentetodaslasinstrucciones.Conserveestasinstrucciones
enunlugarseguroparafuturareferencia.Nopermitaquenadiequenohayaleídoestasinstrucciones
arme,encienda,ajusteouseelcalefactor.
Alentador Infrarrojo A Gas Para Talleres
18682
www.mrheater.com •800-251-0001

2Instrucciones de uso y manual del usuario
Gas Fired Infrared Space Heater
ADVERTENCIA:
Lainstalación,elajuste,laalteración,lasreparacioneso
elmantenimientoinadecuadospuedenprovocardañosmateriales,
lesionesomuertes.Leacuidadosamentelasinstruccionesde
instalación,usoymantenimientoantesdeinstalaroreparar
estecalentador.Paraobtenerasistenciaoinformaciónadicional,
consulteconuninstalador,unaagenciadereparaciónoun
proveedordegascalificados.
ADVERTENCIA:
Cuandoseutilizasinairefresco,esposiblequeelcalentadordes-
pidaMONÓXIDODECARBONO,ungasvenenosoinodoro.ABRA
LAVENTANAUNAODOSPULGADASPARAQUECORRAAIRE
FRESCOCUANDOUTILICEELCALENTADOR.
ADVERTENCIA:
EstecalentadorestáequipadoconunSISTEMADESEGURIDAD
DEENCENDIDODELPILOTO.NOMODIFIQUEELSISTEMADE
SEGURIDADDEENCENDIDODELPILOTO.
ADVERTENCIA:
Sielcalentadorseapaga,novuelvaaencenderlosinantesdejar
correrairefresco.Sielcalentadorsigueapagándose,hágalorepa-
rar.Mantengaelquemadoryelcontrollimpios.Abralapuerta
durante5minutos.
Mantengadistancia,comosemuestraenlaFigura2oenlaplacadel
calentador.
• NOUTILICEFÓSFOROSNININGUNAOTRALLAMAPARA
VERIFICARLASFUGAS.
• NOEXCEDALOS3,44kPa(1/2PSI)DEPRESIÓNDEENTRADAAL
CALENTADOR.
PELIGRO:
Laintoxicaciónconmonóxidodecarbonopuedellevaralamuerte
Intoxicación con monóxido de carbono:
Losprimerossíntomasdelaintoxicaciónconmonóxidode
carbonosongripeydolordecabeza,mareosonáuseas.Si
presentaalgunodeestossíntomas,puedeserqueelcalentador
noestéfuncionandocorrectamente.Tomeairefrescode
inmediato.Llamealpersonalcalificadoparaquelerealiceel
serviciodemantenimientoalcalentador.Algunaspersonasse
venmásafectadasporelmonóxidodecarbonoqueotras.Esto
incluyemujeresembarazadas,personasconproblemascardíacos
opulmonares,personasconanemia,personasqueestánbajola
influenciadelalcoholyaquellasqueseencuentranenaltitudes
elevadas.
CUIDADO:
• Nuncaconectelaválvuladegasoeltermostatoaunvoltaje
delíneaoauntransformador.
• Sielcolorinfrarrojodelarejillaseempalidececuandoelcalen-
tadordeledificioestáfuncionando,consulteconelproveedor
degassobreeltamañocorrectodelatuberíadesuministrode
gas.
• Estecalentadoresaptosoloparaunainstalacióneninteriores
IMPORTANTE
Elmaterialdelasjuntasutilizadoenelarmadodeestecalentador
emitirá,momentáneamente,unolorovapor.Estoserevertirá
enaproximadamente20minutosyluegonovolveráasuceder.
ConsulteelCapítulo9paraobtenerinformaciónsobrela
ventilación.
TABLA DE CONTENIDO
1.INFORMACIÓNGENERAL........................................................ 3
2.DISTANCIAS............................................................................ 3
3.SUSPENSIÓN.......................................................................... 4
4.UMINISTRODEGAS.............................................................. 4
5.EQUISITOSDELASTUBERÍAS................................................. 4
6.PRESIÓNDEGAS................................................................... 4
7.ELECTRICIDAD........................................................................ 4
8.TERMOSTATOYUBICACIÓN................................................. 4
9.VENTILATION.......................................................................... 5
10.PROCEDIMIENTODEENCENDIDO......................................... 5
11.APAGADODELCALENTADOR............................................... 5
12.INSTRUCCIONESDEMANTENIMIENTO
 PARAELOPERADOR............................................................. 5
13.REEMPLAZODELAUNIDADDELAVÁLVULADEGAS........... 6
14.RECUENCIADELASVERIFICACIONESDELOPERADORS........ 6
15.LISTADEREPUESTOSMH40................................................. 7
16.GARANTÍA.......................................................................... 8
ADVERTENCIA:
UNADELASSUSTANCIASQUESEDESPRENDEENLACOM-
BUSTIÓNALUSARESTEEQUIPOESELMONÓXIDODECAR-
BONO,UNCOMPUESTOQUÍMICOQUEDEACUERDOCONEL
ESTADODECALIFORNIAPRODUCECÁNCERYDEFECTODE
NACIMIENTIO(UOTROSDAÑOSREPRODUCTIVOS.)
Paraobtenermásinformación,vistewww.P65Warnings.ca.gov