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.
Models50DKR&75DKTRarenotsuitableforuseonwood
floorsorothercombustiblematerials.Whenused,theheater
shouldrestonsuitableinsulatingmaterialatleast1inch
thickandextending3ft.ormorebeyondtheheaterinall
directions.
HEATER START UP
1. 50DKR:Plugtheheaterintoagrounded1 15V,60Hz,1Ø
outlet.
75DKTR, 125DKTR, 175DKTR: Turnthermostattolowest
setting,makesure"On/Off"switchis"Off".Plugtheheater
intoagrounded1 15V,60Hz,1Øoutlet.Turnthermostat
tohighestsetting.Startheaterbypushingtoggleswitch
to"On"position(lightsignifiesswitchisin"ON"position).
Adjustthermostattodesiredsetting.Heaterwillcycleon/off
asheatisrequired.
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. 50DKR: Unplugheaterfrompowersource.
75DKTR, 125DKTR, 175DKTR: Push"On/Off"switchto
"Off"position.Forextendedshutdown,unplugheaterfrom
powersource.
Mr. Heater, Inc. | Kerosene Forced Air Heater
RESTART AFTER SAFETY SHUTDOWN(50DKR, 75DKTR,
125DKTR, 175DKTR ) See page 7
50DKR-Unplugunit.Wait5minutes.Plugbackin.
75DKTR,125DKTR,175DKTR-Toggleswitchto"OFF"position,
wait5minutes.Restart.
MAINTENANCE AND STORAGE
WARNING.Topreventpersonalinjury,unplugtheheaterfrom
thewalloutletbeforeservicing.
Formaximumefficiencyandtrouble-freeservice,makethe
followingperiodicmaintenance,cleaningandinspections.
ADJUSTING PUMP PRESSURE
Duetovaryingfuelviscositiesandnormalcomponentwearthe
pumppressureonthisheatermayneedtobeadjusted.
PressureAdjustmentScrew(locatedattherearoftheheater)
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.
4
Operating Instructions and Owner's Manual