GHP Group M75DGD Manual

CONSUMER : Retain this manual for future reference.
Questions, problems, missing parts? Before returning to your retailer, call our customer
service department at 877-447-4768 8:30 a.m. - 4:30 pm CST, Monday - Friday.
or email us at [email protected]
INDOOR/OUTDOOR PRODUCTS
KEROSENE PORTABLE
FORCED AIR HEATERS
“USER’S MANUAL AND
OPERATING INSTRUCTIONS”
Before the first use of this heater, please read this USER’S MANUAL very
carefully. This USER’S MANUAL has been designed to instruct you as to
the proper manner in which to assemble, maintain, store, and most
importantly, how to operate the heater in a safe and efficient manner.
Please keep this manual for future reference.
COMPLIES WITH UL733 AND
ANSI A10.10-1990
CAN/CSA/B140.0-03 AND CSA
B140.8-1967
!"#$%&''()*$+,-./0'10-" !"#$%&''()*$2&)31-0/4&) 5()06(/10-"-73$5&*"'8 9"3/-.:4&)
!"#$%&% !"'#$%&% (!')*+,#$-%&% #$.///01234
!"56$%&% !"'56$%&% (!')*+,56$-%&%)/5 56$.///01234
!"5#/%&% !"'5#/%&% (!')*+,5#/-%&%)/5 56$.///01234
!"65/%&% !"'65/%&% (!')*+,65/-%&%)/5 65/.///01234

1
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
DANGER:IMPROPER USEOF THIS HEATER CAN RESULT IN SERIOUS INJURY OR DEATH
FROM BURNS, FIRE, EXPLOSION, ELECTRICALSHOCK AND/OR CARBON
MONOXIDEPOISONING.
WARNINGS:
1. RISK OF INDOOR AIR POLLUTION!
•Usethis heater only in well ventilated areas. Provide at least a three-square foot(2,800 sq. cm.)
opening of fresh outside air for each 100,000 BTU/hr. of heater rating.
•People with breathing problems should consult a physician beforeusing the heater.
•Carbon monoxide poisoning: Early signs of carbon monoxide poisoning resemble the flu, with headaches, dizziness
and/or nausea. If you have these signs, the heater may notbeworking properly.
Get fresh air at once!Have the heater serviced. Some people are more affected by carbon monoxide than others.
These includepregnant women, persons with heart or lung disease or anemia, thoseunder the influence of alcohol, or
those at high altitudes.
•Never use this heater in living or sleeping areas.
2. RISK OFBURNS/FIRE/EXPLOSION!
•NEVER use any fuel other than1-K kerosene, #1 disel/fuel oil inthis heater.
•NEVER use fuel suchasgasoline, benzene, paint thinners or otheroil compounds in this heater.
(RISK OF FIRE OR EXPLOSION)
•NEVER use thisheater where flammable vapors may be present.
•NEVER refill the heaters fuel tank while heater is operating or is still hot.
Minimum Clearances: Outlet: 8 feet (250cm) /Sides, top and rear: 4 feet (125cm)
•NEVER block airinlet (rear) or air outlet (front) of heater.
•NEVER use duct work in front orbehind of heater.
•NEVER move, handle, service a hot, operating or plugged in heater.
•NEVER transport heater with fuel init’s tank.
•When used withanoptional thermostat or if equipped with a thermostat heater may start at any time.
•ALWAYSlocate heaterona stable and level surface.
•ALWAYSkeep children andanimalsaway from heater.
•Bulk fuel storage should be a minimum of 25 ft. from heaters, torches, portable generators or other sources of ignition.
All fuel storage should be in accordance with federal, state or local authorities having jurisdiction.
3. RISK OF ELECTRIC SHOCK!
•Use only the electrical power (voltage and frequency) specified on the model plate of the heater.
•Use only a three-prong, grounded outlet and extension cord.
•ALWAYSinstall the heater so that it is not directlyexposed to water spray, rain, dripping water or wind.
•ALWAYSunplug the heater when not in use.
PROPOSITION 65 WARNING: Fuels used in gas, wood-burning or oil fired appliances, and the
products of combustion of such fuels, contain chemicals known to the State of California to cause cancer,
birth defects and other reproductive harm.
MASSACHUSETTS RESIDENTS: Massachusetts state law prohibits the use of this heater in any
building which is used in whole or in part for human habitation. Use of this heating device in
Massachusetts requires local fire dept. permit (M.E.L.C. 148, Section 10A.)
CANADIAN RESIDENTS: Use of this heater shall be in accordance with authorities having
jurisdiction and CSA Standard B139.
NEW YORK CITY RESIDENTS: For use only at construction sites in accordance with applicable NYC
codes under NYCFD certificate of approval # 5034 and 5037.
CAUTION :Hot while in operation. Do not touch. Keep children,
clothing and combustibles away from heater.

2
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
ITEM PAGE #
1EDIUGYTEFAS-SNOITUACERP
2NOITCUDORTNI.1
2SERUTAEF.2
4YLBMESSADNAGNIKCAPNU.3
6)LIOLEUF1.ONROK-1(ENESOREK.4
7NGISEDRETAEHFOWEIVREVO.5
8RETAEHRUOYGNILEUF.6
8NOITAREPO.7
9RETAEHRUOYFOEGAROTSMRETGNOL.8
01ECNANETNIAM.9
41ESUFGNICALPER.01
51EDIUGGNITOOHSELBUORT.11
61MARGAIDGNIRIW.21
71SNOITACIFICEPS.31
81GNIWARDSTRAPDEDOLPXE.41
12TSILSTRAP.51
1. INTRODUCTION
Please read this USER’S MANUAL carefully. It will show you how to assemble, maintain, and operate the
heater safely and efficiently to obtain full benefits from its many built-in features.
2. FEATURES
CONTENTS OF USER’S MANUAL
Fan Guard
Fuel Gauge
Fuel Cap
Front Guard
Hot Air Outlet
Lower Shell
Fuel Tank
Side Cover
Lamp
Thermostot Knob
(75TDGD Model Only)
Power/Reset Switch
Power Cord
(Piggy Back, 75TDGD Model Only)
Upper Shell
Handle
Figure 1. RMC-KFA50DGD/75TDGD MODELS

3
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
Figure 2. RMC-KFA125/170TDGD-01 MODELS
Figure 3. RMC-KFA210TDGD-01 MODEL
Hot Air Outlet
Shell Lower
Fuel Gauge
Fuel Cap
Side Cover
Lamp
Thermostot Knob
Room Temp. Display
(170TDGD-01 Model Only)
Power/Reset Switch
10” Flat Free Wheel
Hot Air Outlet
Shell Lower
Fuel Gauge
Fuel Cap
Side Cover
Thermostot Knob
Lamp
Room Temp. Display
Power/Reset Switch
10” Flat Free Wheel
Snap Fit Front Handle
Snap Fit Rear Handle
Snap Fit Rear Handle
Upper Shell
Snap Fit Front Handle
Electric Outlet
Upper Shell
Cord Wrap
Cord Wrap
BTU Control Switch
Pressure Gauge
Fan Guard
Power Cord
(Piggy Back)
Fuel Drain Bolt
BTU Control Switch
Pressure Gauge
Fan Guard
Power Cord
Fuel Drain Bolt

4
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
Figure 5. RMC-KFA125/170/210TDGD-01 MODELS
3. UNPACKING AND ASSEMBLY
1. REMOVE THE HEATER AND ALL PACKING MATERIALS FROM THE BOX. (Fig. 4 and 5)
NOTE : Save the shipping carton and packing materials for future storage.
Figure 4. RMC-KFA50DGD/75TDGD MODELS
RMC-KFA50DGD
RMC-KFA75TDGD
RMC-KFA170TDGD-01
RMC-KFA210TDGD-01
RMC-KFA125TDGD-01
Snap Fit Front Leg No Yes Yes
Wheel No Yes Yes
seYseYoNThreaded Axle
seYseYoNSnap Fit front Handle
Snap Fit Rear Handle seYseYoN
oNoNseYeldnaH
seYseYseYparWdroC
Hardware kit : HW-KFA1000 Yes No No
Hardware kit : HW-KFA1015 No Yes Yes
Wheels
(10” Flat Free)
Bushings Cap Nuts
Hardware Kit : HW-KFA1015
Threaded Axle
Snap Fit Front Leg
Snap Fit Rear Handle
Snap Fit Front Handle
Handle Hardware Kit
HW-KFA1000

5
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
2. ASSEMBLY
For RMC-KFA50DGD/75TDGD Models only
(Assembly time for this product is 3 minutes)
For RMC-KFA125/170/210TDGD-01 Models only (Assembly time for this product is 10 minutes)
Tools Required
•Medium Phillips Screwdriver.
1) Lift front guard for arrow direction and make
sure that guard’s wedged portion fits into the slit
hole on the upper housing.
2) Align the holesinthe upper housing withtwo
mounting holes on the handle as shown in Figure6.
3) Secure handle with Screws with provided.
Tools Required
•3/4 inch Socket or Adjustable Wrench
1) Align and insert snapfit front leg in to the front section of the bottom leg and wheel support. You will need
to depress the metal buttons when installing. See Figure 7 below.
2) Slide threaded axle through the rear sectioon of the bottom leg and wheel support.
3) Slide one axle bushing on to each side of the axle. Slide one wheel on to each side of the axle. Attach one
cap nut on to each side of the threaded axle and tighten well.
4) Align and insert snapfit front and rear handles to the top support handle. You will need to depress the metal
buttons on each handle when installing. See Figure 7 below.
Figure 7. Assembling Handles & Wheels
CAUTION : DO NOT OPERATE heater without support frame assembled to tank.
NOTE : Heater should be inspected before each use, and at least annually by a qualified service person.
Button
Hole
Snap Fit Front Handle
Snap Fit Rear Handle
Cap Nut
Wheel
Bottom Leg And Wheel Support
Snap Fit Front Leg
Top Handle Support
Threaded Axle
Bushing
Figure 6. Assembling Handle
Handle Screw Front Guard
Slit Hole
Wedged Portion

6
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
4. KEROSENE (1-K)
For optimal performance of this heater, it is strongly suggested that 1-K kerosene be used. 1-K kerosene has
been refined to virtually eliminate contaminants, such as sulpher. Which can cause a rotten egg odor during
the operation of the heater. However, #1 diesel/fuel oil may also be used if 1-K kerosene is not available.
Be advised that these fuels do not burn as clean as 1-K kerosene, and care should be taken to provide more
fresh air ventilation to accomodate any added contaminants that may be added to the heated space.
KEROSENE SHOULD ONLY BE STORED IN A BLUE CONTAINER THAT IS CLEARLY
MARKED “KEROSENE”. NEVER STORE KEROSENE IN A RED CONTAINER.
Red containers are associated with gasoline.
NEVER store kerosene in the living space. Kerosene should be stored in a well ventilated place outside the
living area.
NEVER use any fuel other than 1-K kerosene (#1 diesel and #1 oil are acceptable substitutes)
NEVER use fuel such as gasoline, benzene, alcohol, white gas, camp stove fuel, paint thinners, or other oil
compounds in this heater. These are volatile fuels that can cause an explosion or uncontrolled flames.
NEVER store kerosene in direct sunlight or near a source of heat.
NEVER use kerosene that has been stored from one season to the next. Kerosene deteriorates over time.
“OLD KEROSENE” WILL NOT BURN PROPERLY IN THIS HEATER.

5. OVERVIEW OF HEATERS DESIGN
Fuel System : This heater is equipped with an electric
air pump that forces air through the air
line connected to the fuel intake and then
through a nozzle in the burner head.
When the air passes in front of the fuel
intake it causes fuel to rise from the tank
and into the burner nozzle. This fuel and
air mixture is then sprayed into the
combustion chamber in a fine mist.
“Sure Fire Ignition” : The electronic ignitor sends voltage to a specially designed spark plug.
The spark plug ignites the fuel and air mixture described above.
The Air System : The heavy duty motor turns a fan that forces air into and around the combustion chamber.
Here the air is heated and then forced out the front of the heater.
The Safety System :
A. Temperature Limit Control : This heater is equipped with a Temperature Limit Control designed to turn
off the heater should the internal temperature rise to an unsafe level. If this
device activates and turns your heater off it may require service.
Once the temperature falls below the reset temperature you will be able to start your heater.
B. Electrical System Protection : This heaters electrical system is protected by a fuse mounted to the PCB
assembly that protects it and other electrical components from damage.
If your heater fails to operate check this fuse first and replace as needed.
C. Flame-Out Sensor : Utilizes a photocell to monitor the flame in burn chamber during normal operation.
It will cause the heater to shut-off should the burner flame extinguish.
7
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
Internal Shut-Off Temp. Reset Temperature
MODELS Plus/Minus 10 Degrees Plus/Minus 10 Degrees
RMC-KFA50DGD/75TDGD 176˚F/80˚C122˚F/50˚C
RMC-KFA125/170TDGD-01 230˚F/110˚C194˚F/90˚C
RMC-KFA210TDGD-01 194˚F/90˚C140˚F/60˚C
FUSE TYPE: All Models 125 volt / 8 amps

6. FUELING YOUR HEATER
NEVER FILL THE HEATER FUEL TANKIN THE LIVINGSPACE : FILL THE TANK OUTDOORS.
DO NOT OVERFILL YOUR HEATER AND BE SURE HEATER IS LEVELED.
IMPORTANT NOTICE REGARDING FIRST IGNITION OF HEATER :
The first time you light the heater, it should be done outdoors. This allows the oils, etc. used in
manufacturing the heater to burn off outside.
WARNING!! :NEVER REFILL HEATER FUEL TANKWHEN HEATER IS OPERATING OR STILL HOT.
7. OPERATION
A.) VENTILATION
RISK OF INDOOR AIR POLLUTION/USE HEATER ONLY IN WELL VENTILATED AREAS.
Provide a fresh air opening of at least three square feet (2,800 sq. cm) for each 100,000 BTU/Hr.
rating. Provide extra fresh air if more heaters are being used.
Example : A RMC-KFA210TDGD-01 heater requires one of the following:
• a two-car garage door raised six inches (15.24 cm)
• a single-car garage door raised nine inches (22.86 cm)
• two, thirty-inch (76.20 cm) windows raised fifteen inches (38.1 cm)
B.) OPERATION
TO START HEATER
1. Fill fuel tank with kerosene or No. 1 fuel oil.
2. Attach fuel cap.
3. Plug power cord of heater into three-prong, grounded extension cord. Extension cord must be at
least six feet long.
Extension Cord Wire Size Requirements
• 6 to 10 feet (1.8 to 3 meters) long, use 18 AWG conductor.
• 11 to 100 feet (3.4 to 30.5 meters) long, use 16 AWG conductor.
• 101 to 200 feet (30.8 to 61 meters) long, use 14 AWG conductor.
4. Turn “THERMOSTAT CONTROL knob” to desired setting (setting range : 40˚F ~ 110˚F)
(RMC-KFA75TDGD/RMC-KFA125/170/210TDGD-01 Models Only)
5. Push “BTU control Switch” to desired level “High or LOW” (See Figure 8.)
(RMC-KFA125/170/210TDGD-01 Models Only)
6. Push Power Switch to “ON” position, Power lndicator Lamp will light and heater will start.
NOTE : Room Temperature display explanations are as follows: (RMC-KFA170/210TDGD-01 Models only)
•When the room temperature is less 0℉, the LED display will show “Lo”
When room temp is between 0℉ and 99℉, the number shown on the display is the current
room temperature.
When room temperature is greater than 99℉, the LED display will show “Hi”
•
•
If heater does not start, the thermostat setting may be too low, turn “thermostat Control Knob” to
higher position to start heater. If heater still does not start, turn power switch to “OFF” and then to
“ON” position. If heater still does not start, see Troubleshootiong Guide on page15.
NOTE : User can Select to operate the heater on two different BTU levels(High or Low). The BTU level can
be selected before turning the unit on, or while it is in operation by pushing the BTU control switch.
8
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
Figure 8. Controls for All Models
Power/Reset
Switch
RMC-KFA50DGD/75TDGD/
125TDGD-01 Models
RMC-KFA170/210TDGD-01 Models
Room Temp. Display
Power/Reset
Switch
Thermostat
Control Knob
(75TDGD/125TDGD-01 MODELS ONLY)
Thermostat
Control Knob
Lamp Lamp
BTU Control Switch BTU Control Switch
Fan Guard
Push to “HIGH”
Push to “LOW”

9
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
NOTICE : Themajor electrical components of this heater are protected by a safety fusemounted to the PCB board.
If yourheater fails to start, check this fusefirst and replace as necessary. You should also check your
power source to insure that proper voltageand frequency are being supplied to theheater.
TO STOP HEATER
1. Turn switch to “OFF” and unplug power cord.
TO RESTART HEATER
1.Wait 10 seconds after stopping heater.
2. Repeat steps under to start heater.
EXTRA ELECTRIC OUTLET & PIGGYBACK POWER CORD
WARNING : SHOCK HAZARD!
8. LONG TERM STORAGE OF YOUR HEATER
FUEL TANK DRAIN
1. Drain fuel tank through fuel cap opening.
(For RMC-KFA50DGD/75TDGD Models Only)
2. Remove fuel drain bolt from rear bottom side of fuel tank using 3/4” socket or adjustable wrench and drain.
(For RMC-KFA125/170/210TDGD-01 Models Only. See Figure 10)
3. Using a small amount of kerosene, swirl and rinse the inside of the tank.
NEVER mix water with the kerosene as it will cause rust inside the tank.
Pour the kerosene out making sure that you remove it all.
IMPORTANT : Do not store kerosene over summer months for use during next heating season.
Using old fuel could damage heater.
4. Reinstall fuel cap. Properly dispose of old and dirty fuel. (For RMC-KFA50DGD/75TDGD Models Only)
5. Reinstall fuel drain bolt to Fuel tank and tighten firmly using 3/4” socket or adjustable wrench.
(For RMC-KFA125/170/210TDGD-01 Models Only. See Figure 10)
IMPORTANT : Before reinstalling the fuel drain bolt, make sure the seal is on the bolt. If the seal is
not used the bolt cannot be installed correctly and the fuel tank will leak.
6. Store heater in dry well ventilated area. Make sure storage place is free of dust and corrosive fumes.
7. Store the heater in the original box with the original packing material and keep the USER’S MANUAL
with the heater.
•Always cover electric outlet
when not in use.
•Don’t plug and use a appliance
more than 120V/60Hz 5A
current in this outlet
Figure 10. Fuel Drain Bolt
Fuel Drain Bolt
Seal
revoCrevoC
Outlet
RMC-KFA210TDGD-01 Model Only RMC-KFA75TDGD/125/170TDGD-01 Models only
Figure 9. Electric Outlet
Outlet

A.) FUEL TANK
FLUSH EVERY 200 HOURS OF OPERATION OR
AS NEEDED (SEE STORAGE, PAGE 9)
B.) AIR INTAKE FILTER
WASH AND DRY WITH SOAP AND WATER
EVERY 500 HOURS OF OPERATION OR AS
NEEDED.
- Remove screws along each side of heater using
medium phillips screwdriver.
- Lift upper shell off.
- Remove fan guard.
- Wash or replace air intake filter.
- Reinstall fan guard and upper shell.
C.) AIR OUTPUT FILTER, LINT FILTER
REPLACE EVERY 500 HOURS OF OPERATION
OR ONCE A YEAR.
- Removeupper shell and fan guard (See Air Intake Filter).
- Trun Air pressure gauge counter-clock wise and
remove.
- Remove end filter cover screws using medium
phillips screwdriver.
- Remove end filter cover.
- Replace air output and lint filter.
- Reinstall end filter cover and air pressure gauge.
- Reinstall fan guard and upper shell.
D.) FAN BLADES
CLEAN EVERY SEASON OR AS NEEDED.
- Remove upper shell (See Air Intake Filter).
- Use M6 allen wrench to loosen set screw
which holds fan blade to motor shaft.
- Slip fan blade off motor shaft.
- Clean fan blade using a soft cloth moistened with
kerosene or solvent.
- Dry fan blade thoroughly.
- Reinstall fan blade on motor shaft. Place fan
blade hub flush with end of motor shaft.
- Place set screw on flat of shaft. Tighten set screw
firmly (40-50 inch-pounds/4.5-5.6 N-m).
- Reinstall upper shell. 10
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
9. MAINTENANCE
WARNING!! : NEVER SERVICE HEATER WHILE IT IS PLUGGED IN OR
WHILE HOT!
USE ORIGINAL EQUIPMENT REPLACEMENT PARTS. Use of third party or
other alternate components will void warranty and may cause unsafe operating
conditions.
Figure 11. Air Intake Filter Access
Figure 12. Air Outprt Filter Access
Figure 13. Fan Assembly
Flush
Motor
Blade
Fan
Set screw
Motor Shaft
Upper Shell
Screw
Screw
Fan Guard
Lint Filter
Pressure Gauge Air Intake Filter
Air Output Filter
End filter cover
Air Intake Filter

11
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
E.) NOZZLE
REMOVEDIRTIN NOZZLE AS NEEDED (SEE PAGE16).
(For RMC-KFA50DGD/75TDGD/125/170TDGD-01 Models Only)
- Remove upper shell (See page 10).
- Remove fan blade (See page 10).
- Remove fuel and air line hoses from burner head.
- Remove ignitor wire from spark plug.
- Remove three screws using medium phillips screwdriver
and remove burner head from combustion chamber.
- Remove spark plug from burner head using medium
phillips screwdriver.
- Carefully remove nozzle from burner head using 5/8”
socket wrench.
- Blow compressed air through face of nozzle. (this will
remove any dirty in nozzle)
- Reinstall nozzle into burner head and tighten firmly.
(80~110 inch-pounds)
- Reinstall spark plug in burner head.
- Attach burner head to combustion chamber.
- Attach ignitor wire to spark plug.
- Attach fuel and air line hoses to burner head.
- Reinstall fan blade and upper shell.
(For RMC-KFA210TDGD-01 Model Only)
- Remove upper shell (See page 10).
- Remove fan (See page 10).
- Remove fuel and air line hoses from adaptor-nozzle.
- Remove ignitor wire from spark plug.
- Remove four screws using medium phillips screwdriver
and remove burner-bracket from combustion chamber.
- Remove spark plug from burner head using medium
phillips screwdriver.
- Carefully remove nozzle from adaptor-nozzle using 5/8”
socket wrench.
- Blow compressed air through face of nozzle.
(this will remove any dirt in nozzle)
- Reinstall nozzle into adaptor-nozzle and tighten firmly.
(80~110 inch-pounds)
- Reinstall spark plug in spark-bracket.
- Attach burner-bracket to combustion cahmber.
- Attach ignitor wire to spark plug.
- Attach fuel and air line hoses to adaptor-nozzle.
- Reinstall fan blade and upper shell.
Combusion chamber
Burner Bracket
Screw
Ignitor Wire
Fuel Line Hose
Bracket Burner
Bracket Spark
Fuel Line
Fitting
Spark Plug
Air Line Fitting
Air Line Hose
Nozzle Face
Nozzle
Spark Plug
Figure 15. Nozzle Replacement
Figure 14. Nozzle Replacement
Fuel Line
Air Line
Burner Head
Nozzle
Nozzle Face
Ignitor Wire
Spark Plug
Burner Head
Screw
Combustion Chamber

12
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
F.) SPARK PLUG
CLEAN AND REGAP EVERY 600 HOURS
OPERATION OR REPLACE AS NEEDED.
(For RMC-KFA50DGD/75TDGD/125/170TDGD-01 Models Only)
- Remove upper shell (See page 10).
- Remove fan (See page 10).
- Remove ignitor wire from spark plug.
- Remove spark plug from burner head using medium
phillips screwdriver.
- Clean and regap spark plug electrodes to 3.5mm gap.
- Reinstall spark plug in burner head.
- Attach ignitor wire to spark plug.
- Reinstall fan and upper shell.
(For RMC-KFA210TDGD-01 Model Only)
- Remove upper shell (See page 10).
- Remove fan (See page 10).
- Remove ignitor wire from spark plug.
- Remove spark plug from spark-bracket using medium
phillips screwdriver.
- Clean and regap spark plug electrodes to 3.5mm gap.
(0.138 )
- ReInstall spark plug in spark-bracket.
- Attach ignitor wire to spark plug.
- Reinstall fan and upper shell.
G.) PHOTOCELL
CLEAN PHOTOCELL ANNUALLY OR AS
NEEDED.
- Remove upper shell (See page 10).
- Remove fan (See page 10).
- Remove photocell from it’s mounting.
Clean photocell lens with cotton swab.
TO REPLACE:
- Remove side cover screws using medium phillips
screwdriver.
- Disconnect switch wires from power switch and
remove side cover.
- Disconnect wires from circuit board and remove
photocell.
- Install new photocell and connect wires to circuit
board.
- Replace switch wires to power switch and side cover.
- Replace fan and upper shell.
Switch
Wires
Brocket
Photocell
Lens
Incorrect Correct
Photocell
Wire
Power
Switch
Screw
Side Cover
Bracket Burner
Burner Head
Spark Plug
GAP
Spark Plug
Ignitor wire
Figure 16. Spark Plug Regap
Figure 17. Spark Plug Regap
Ignitor Wire
Bracket Spark
Spark Plug
Figure 18. Photocell Replacement

H.) FUEL FILTER
CLEAN OR REPLACE TWICE A HEATING
SEASON OR AS NEED.
- Remove side cover screws using medium phillips
screwdriver.
- Disconnect switch wires from power switch and
remove side cover.
- Pull fuel line off fuel filter neck.
- Turn fuel filter 90˚ to counter clockwise and pull to
remove (RMC-KFA50DGD/75TDGD Models only).
- Turn fuel filter 90˚ to clockwise and pull to remove
(RMC-KFA125/170/210TDGD-01 Models only).
- Wash fuel filter with clean fuel and replace in tank.
- Attach fuel line to fuel filter neck.
- Replace switch wires to power switch.
- Reinstall side cover.
I.) PUMP PRESSURE ADJUSTMENT
- Start heater (See Operation, page 8)
Allow motor to reach full speed
- Adjust pressure (Using a flat blade screwdriver) Turn
relief valve to clockwise to increase pressure. Turn
relief valve to counter clockwise to decreasepressure.
- Stop heater (See Operation, page 8)
NOTE : USE ONLY ORIGINAL EQUIPMENT
REPLACEMENT PARTS.
Use of alternate or third party components will
void any warranty and may cause unsafe
operating condition.
Pump Pressure
High BTU level Low BTUlevel
RMC-KFA50DGD
RMC-KFA75TDGD
RMC-KFA125TDGD-01
RMC-KFA170TDGD-01
RMC-KFA210TDGD-01
3.8 psi N/A
3.8 psi N/A
5.5 psi 3.5 psi
6.5 psi 4.5 psi
8.5 psi 6.5 psi
Fuel Filter
Fuel line
Switch Wires
Screw
Side Cover
Power Switch
13
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
Figure 19. Fuel Filter Replacement
Figure 20. Adjusting Pump Pressure
MODEL
- Remove Pressure Gauge Plug from End Filter Cover.
Install accessory Pressure Gauge.
(RMC-KFA50DGD/75TDGD
Models only)
Flat blade
Screw driver
RMC-KFA50DGD/75TDGD Models Only
RMC-KFA125/170/210TDGD-01 Models only
Relief Valve
Relief Valve
Pressure Gauge
Pressure Gauge
Pressure Gauge Plug
End Filter Cover.
BTU Control Switch
- Push the BTU CONTROL Switch to HIGH.
(See Operation, page 8, RMC-KFA125/170/
210TDGD-01 Models only)
NOTE: If the pump pressure needs to be adjusted,
make sure the heater is running on the
HIGH BTU setting.

14
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
10. REPLACING FUSE
NOTICE : This heater is fuse protected.
If your heater fails to ignite, DO NOT RETURN YOUR HEATER TO THE
STORE.
Please follow the simple instruction below to inspect and change the fuse.
WARNING : SHOCK HAZARD
To prevent personal injury, unplug the power cord before replacing fuse.
1. Unplug heater.
2. Remove side cover screws using medium phillips screw driver.
3. Disconnect switch wires from power switch.
4. Remove fuse from fuse holder.(See Figure 21.)
5. Replace fuse with enclosed fuse.
WARNING : FIRE HAZARD
To avoid fire, Do not substitute with a higher or lower current rating.
6. Replace switch wires to power switch.
7. Replace side cover.
NOTE : Specified fuse rating : AC 125/8A
PROCEDURE FOR REPLACING FUSE
Screw
Side Cover
Power Switch Switch Wire
Fuse
Fuse Holder
Figure 21. Replacing Fuse
RMC-KFA75TDGD/125/170/210TDGD-01 Models
RMC-KFA50DGD
Fuse
Fuse Holder

15
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
11. TROUBLE SHOOTING GUIDE
2. See Air Output, Air intake2. Dirty Air Output,Air Intake
a short period of time.
Heater will not turn-on
room temp. display indicates "E3")
(Indicator Lamp is flickering and
room temp. display indicates "E2")
(Indicator Lamp is flickering and
(Indicator Lamp is on or flickering)
was in the " ON " Position.
is plugged in and power switch
Fan does not turn when heater
indicates " E1 ")
and room temp.display
of time.(Indicator Lamp is flickering
motor runs for a short period
Heater will not ignite but
room temp. display indicates " E1 ")
(Indicator Lamp is flickering and
(Indicator Lamp is off)
temperature limit safety device
and PCB board.
4. Bad electrical connection between
1. Room Temp. sensor disconnected.
3. Blown fuse.
2. No electrical power
device is overheated.
1. Temperature limit safety
1. Thermostat switch failure.
2. Sensor Failure.
See Wiring Diagram, Page 16.
4. Check electrical connections
3. Replace safety fuse in PCB board.
Check power supply.
extension cord are plugged in.
2. Check to insure heater cord and
and allow to cool (about 10 min.)
1. Turn power switch to "OFF"
See Wiring diagram, Page 16.
1. Replace switch.
See Wiring diagram, Page 16.
2. Replace sensor.
See Wiring diagram, Page 16.
1. Reconnect sensor.
8. Ignition wire is not attached to
PCB assembly.
between motor and MAIN
2. Bad electrical connection
1. Thermostat setting is too low.
spark plug.
PCB assembly.
between ignitor and MAIN
7. Bad electrical connection
6. Water in fuel tank.
5. Dirt in Nozzle.
4. Dirty fuel filter.
plug and/or improper gap.
3. Carbon deposits on spark
2. Wrong pump pressure.
1. No fuel in tank.
8. Defective Photocell.
PCB assembly.
between photocell and MAIN
7. Bad electrical connection
Properly installed.(Not seeing the
flame)
6. Photocell Assembly not
5. Dirty Photocell Lens.
4. Dirt in Nozzle.
3. Dirty Fuel Filter.
or Lint Filter.
See Wiring Diagram, Page 16.
2. Check electrical connections,
to a higher setting.
1. Turn thermostat control knob
plug. See Spark Plug, Page 12.
8. Attach ignition wire to spark
See wiring diagram, Page 16.
7. Check electrical components
kerosene, Page 9.
6. Flush fuel tank with clean
5. See Nozzle, Page 11.
4. See Fuel Filter, Page 13.
3. See Spark Plug, Page 12.
Page 13.
2. See Pump Pressure Adjustment,
1. Fill tank with kerosene.
8. Replace Photocell, Page 12.
See wiring diagram, Page 16.
7. Check electrical components
Page 12.
properly seated in bracket,
6. Make sure photocell boot is
5. Clean Photocell Lens, Page 12.
4. See Nozzle, Page 11.
3. See Fuel Filter, Page 13.
and Lint Filters, page 10.
assembly shuts heater off after
Heater ignites but MAIN PCB
TROUBLE POSSIBLE CAUSE
1. Wrong pump pressure Page 13. 1. See Pump Pressure Adjustment,
CORRECTIVE ACTION

MODEL CAPACITOR
1/G WIRE
COLOR
75TDGD
125TDGD-01
170TDGD-01
12uF/230VAC
BLACK
RED
30uF/250VAC
30uF/250VAC
BLACK
WHITE
BLACK
BLUE
16
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
12. WIRING DIAGRAM
A) WIRING DIAGRAM (RMC-KFA50DGD Model)
B) WIRING DIAGRAM (RMC-KFA75TDGD/125/170TDGD-01 Models)
C) WIRING DIAGRAM (RMC-KFA210TDGD-01 Model)

17
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
RMC-KFA50DGD/75TDGD Models
RMC-KFA125/170/210TDGD-01 Models
MODEL
HIGH
LOW
HIGH
LOW
FuelTank Capacity - Gal.( )
HIGH
LOW
zH/tloV
.spmA
esahP
32.0×11.7×16.7
(813×297×424)
26.0(11.8)
Weight Lbs.(㎏)
13. SPECIFICATIONS
Fuel Consumption
- Gal./Hr(./Hr)
Pump Pressure PSI(kgf/㎠)
BTU/Hr.
Size(D×W×H), Inch(㎜)
RMC-KFA50DGD RMC-KFA75TDGD RMC-KFA125TDGD-01 RMC-KFA170TDGD-01 RMC-KFA210TDGD-01
50,000
N/A
0.38(1.44)
N/A
5.0(18.9)
3.8(0.27)
N/A
120Vac/60hz
1.6
1
32.0×11.7×16.7
(813×297×424)
26.0(11.8)
75,000
N/A
0.57(2.16)
N/A
5.0(18.9)
3.8(0.27)
N/A
120Vac/60hz
1.6
1
41.9×21.5×32.4
(1,063×547×824)
53.4(24.2)
125,000
100,000
0.95(3.60)
0.76(2.90)
10.0(37.9)
5.5(0.39)
3.5(0.25)
120Vac/60hz
2.5
1
47.4×23.1×33.5
(1,205×587×850)
59.3(26.9)
170,000
135,000
1.30(4.92)
1.0(3.79)
13.0(49.2)
6.5(0.46)
4.5(0.32)
120Vac/60hz
3.2
1
47.4×23.1×33.5
(1,205×587×850)
65.0(29.5)
210,000
170,000
1.60(6.06)
1.30(4.92)
13.0(49.2)
8.5(0.60)
6.5(0.46)
120Vac/60hz
3.7
1
47.4"(1,205 mm)
23.1"(587 mm)
33.5"(850 mm)
41.9"(1,063 mm)
32.4"(824 mm)
21.5"(547 mm)
D
W
H
125TDGD-01 170TDGD-01
210TDGD-01

NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
14. EXPLODED PARTS DRAWING (RMC-KFA50DGD/75TDGD Models Only)
NOTE : SPECIFY MODEL NUMBER AND PART NUMBER WHEN ORDERING PARTS.
18

NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
14. EXPLODED PARTS DRAWING (RMC-KFA125/170TDGD-01 Models Only)
NOTE : SPECIFY MODEL NUMBER AND PART NUMBER WHEN ORDERING PARTS.
19