3. Slidethelargewasher,thenwheelontotheaxlenexttothe
cotterpin.
4. Slidethespacerontotheaxlenexttothewheel.
5. Slidethepartiallyassembledaxlethroughthewheelsupport
frame.
6. Slidethespacerontotheaxlenexttothewheelsupport.
7.
Slidethewheelthenlargewasherontotheaxleandholdin
placewiththeremainingcotterpin.
8. Installthecapsoverthelargerwasherstofinishthewheel
assembly.
PREPARING FOR OPERATION
1. Checktheheaterforpossibleshippingdamage.Ifanyis
found,immediatelycontactthemanufacturerat
800-251-0001.
2. Followallofthe"Precautions".
3. Fillthefueltankwithcleankerosene.Inextremelycold
weather,condensationmaydevelopinthetankanditis
recommendedthatatablespoonofde-icerbeaddedfor
eachgallon(4liters)offuelinthetank.Whenfillingthe
heater,useatleast2gallons(8liters)offuel.Besureheater
islevelanddonotoverfill.Useafunnelorcanwithalong
fillspout.
IMPOrTanT: Before filling fuel tank the first time or after ex-
tended storage periods, drain the fuel tank of any moisture
or condensation.
4. Locateheateratasafedistancefromcombustiblematerials.
ModelsMH50KR&MH75KTRarenotsuitableforuseon
woodfloorsorothercombustiblematerials.Whenused,the
heatershouldrestonsuitableinsulatingmaterialatleast1
inchthickandextending3ft.ormorebeyondtheheaterin
alldirections.
HEATER START up
1. MH50Kr:Plugtheheaterintoagrounded115V,60Hz,1Ø
outlet.
MH75KTr, MH125KTr, MH175KTr & MH210KTr: Turn
thermostattolowestsetting,makesure"On/Off"switch
is"Off".Plugtheheaterintoagrounded1 15V,60Hz,1Ø
outlet.Turnthermostattohighestsetting.Startheaterby
pushingtoggleswitchto"On"position(lightsignifiesswitch
isin"ON"position).Adjustthermostattodesiredsetting.
Heaterwillcycleon/offasheatisrequired.
EXTENSIONCORDREQUIREMENTS:Upto100'(30.5m)use
16awg.conductor.101'-200'(30.5-61.0m)use14awg.
conductor.
For all models:
• Incoldweather(below10°F),startingmaybeimprovedby
holdingafingerovertheventholeofthepumpadjustment
screwcapuntiltheheaterstarts.
• Thisunitisequippedwithaninterruptcircuit.Theresetis
integratedintothe"On/Off"switch.Iftheunitdoesnot
start,toggletheswitchto"Off",wait5min.andtoggle
theswitchto"On".
HEATER SHuT DOWN
1. MH50Kr: Unplugheaterfrompowersource.
MH75KTr, MH125KTr, MH175KTr & MH210KTr: Push
"On/Off"switchto"Off"position.Forextendedshutdown,
unplugheaterfrompowersource.
resTarT aFTer saFeTY sHuTdOwn(MH50Kr, MH75KTr,
MH125KTr, MH175KTr & MH210KTr) see page 7
Mr. Heater, Inc. | Kerosene Forced Air Heater
MH50KR-Unplugunit.Wait5minutes.Plugbackin.
MH75KTR,MH125KTR,MH175KTR&MH210KTR-Toggleswitchto
"OFF"position,wait5minutes.Restart.
MAINTENANCE AND STORAGE
WARNING.Topreventpersonalinjury,unplugtheheaterfromthe
walloutletbeforeservicing.
Formaximumefficiencyandtrouble-freeservice,makethe
followingperiodicmaintenance,cleaningandinspections.
AdjUSTING PUMP PRESSURE
Duetovaryingfuelviscositiesandnormalcomponentwearthe
pumppressureonthisheatermayneedtobeadjusted.
ADJUSTMENTPROCEDURE:
1. Fillfueltank.
2. Startheater.
3. Locatethefuelpressureadjustmentscrew(ref.#29)inthe
explodedpartsdrawing.Thepressureadjustmentscrew
islocatedattherearoftheheater,intheairfilterhousing
cover(approx.2"fromtheleftsideand1"fromthetop).
Removeanddiscardtherubbercap(ref.#4)toexposethe
screw.
4. Usingaflatbladedscrewdriver,turnthepumppressure
adjustmentscrewclockwisetoincreasepumppressureand/
orcounter-clockwisetodecreasepumppressure.Basepump
pressurescanbefoundinthespecificationschartonpage3
ofthe"OperatingInstructionsandOwners'Manual".
5. Forbestresults,thenoseconeinthecombustionchamber
shouldbecherryredwithnodarkspotsandtheflame
shouldnotextendbeyondthenosecone.
IMPROPERPRESSUREADJUSTMENT
problem: Heaterdoesnothaveastrongconsistentflame.
Heatersmokesandspitsrawfuel.
Noseconedoesnotgetcherryred.
Adjustment:Pumppressureistoolow.
Turnadjustmentscrewclockwisetoincreasepump
pressure.
problem:
Flameextendsbeyondtheendoftheheater.
Adjustment:Pumppressureistoohigh.
Turnadjustmentscrewcounterclockwiseto
decreasepumppressure.
DAILY SCHEDULE
1. GENERAL.Makegeneralvisualinspectionofheaterforloose
ordamagedparts.Checknutsandboltstoinsureagainst
loosenesscausedbyvibrationorroughhandling.Damaged
partsshouldberepairedorreplacedbeforeusingheater
again.Checkheateroperationtobesureitisoperating
normally(See"Servicing"sectionfordescriptionofnormal
operation).
2. FILTERS.Dirtyairorfuelfilterswillcauseanimbalancein
theair-fuelmixture.Thebestindicationthatthiscondition
existsisanincreaseinodorsordifficultygettingyourheater
toignite.Thisheatershouldneverbeoperatedwithoutthe
filtersinplace.Ifrequired,cleanfiltersasdescribedunder
"500Hours"and"AnnualSchedules".
E-4
Operating Instructions and Owner's Manual