Dura Heat DuraHeat DFA-45T User manual

World Marketing of America, Inc.
12256 William Penn Hwy
Mill Creek, PA 17060
1- 800 - 776 - 9425 (9AM - 4PM EST)
MON.- FRI. ONLY
www.yourheater.com
MODEL : DFA-45T
DFA-70T
DFA-125T
DFA-170C
DFA-210C
PORTABLE
FORCED AIR HEATERS
“USER’S MANUAL”
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 the heater, maintain the heater,
store the heater, and most importantly, how to operate the heater in a safe
and efficient manner. Please keep this manual for future reference.
LISTED
D
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C
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D
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4221-0066-00
05/07 Rev. 05
Edition 2007.

1
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
DANGER - IMPROPER USE OF THIS HEATER CAN RESULT IN SERIOUS INJURY OR DEATH
FROM BURNS, FIRE, EXPLOSION, ELECTRICAL SHOCK AND/OR CARBON MONOXIDE POISONING.
WARNINGS:
1. RISK OF INDOOR AIR POLLUTION!
•Use this 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 before using 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 not be working properly.
Get fresh air at once! Have the heater serviced. Some people are more affected by carbon monoxide
than others. These include pregnant women, persons with heart or lung disease or anemia, those under the
influence of alcohol, or those at high altitudes.
• Never use this heater in living or sleeping areas.
2. RISK OF BURNS/FIRE/EXPLOSION!
•NEVER use any fuel other than 1-K kerosene in this heater. #1 fuel oil is the only acceptable
substitute.
•NEVER use fuel such as gasoline, benzene, paint thinners or other oil compounds in this heater.
(RISK OF FIRE OR EXPLOSION)
•NEVER use this heater where flammable vapors may be present.
•NEVER refill the heaters fuel tank while heater is operating or is still hot.
• This heater is EXTREMELY HOT while in operation. Keep all combustible materials away from heater.
Minimum Clearances: Outlet: 8 feet (250cm) / Sides, top and rear: 4 feet (125cm)
•NEVER block air inlet (rear) or air outlet (front) of heater.
• NEVER use duct work in front or behind of heater.
•NEVER move or handle heater while still hot.
•NEVER transport heater with fuel in it’s tank.
• When used with an optional thermostat or if equipped with a thermostat heater may start
at any time.
•ALWAYS locate heater on a stable and level surface.
•ALWAYS keep children and animals away 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.
•ALWAYS install the heater so that it is not directly exposed to water spray, rain, dripping water or wind.
•ALWAYS unplug the heater when not in use.
CALIFORNIA RESIDENTS: This heater produces carbon monoxide, which is listed by the State of
California as a reproductive toxin under Proposition 65.
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.

2
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
ITEM PAGE #
PRECAUTIONS - SAFETY GUIDE 1
1. INTRODUCTION 2
2. FEATURES 2
3. UNPACKING AND ASSEMBLY 4
4. KEROSENE (1-K OR NO. 1 FUEL OIL) 7
5. OVERVIEW OF HEATER DESIGN 8
6. FUELING YOUR HEATER 9
7. OPERATION 9
8. LONG TERM STORAGE OF YOUR HEATER 10
9. MAINTENANCE 11
10. REPLACING FUSE 16
11. TROUBLE SHOOTING GUIDE 17
12. WIRING DIAGRAM 18
13. SPECIFICATIONS 19
14. EXPLODED PARTS DRAWING 20
15. PARTS LIST 22
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
Figure 1. DFA-45T / DFA-70T MODELS
Fuel Gauge
Fan Guard
Handle
Hot Air Outlet
Front Guard
Upper Shell
Lower Shell
Side Cover
Thermostat Knob
Power/Reset Switch
Lamp
Fuel Cap
Fuel Tank
Power Cord

3
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
Figure 2. DFA-125T MODEL
Figure 3. DFA-170C/210C MODELS
Hot Air Outlet
Fuel Gauge
Fuel Cap
Fuel Tank
Fuel Tank
Lamp
Thermostat Knob
Lower Shell
Handle
Upper Shell
Fan Guard
Power Cord
Drain Plug
Power/Reset Switch
Side Cover
Side Cover
Fuel Gauge
Fuel Cap
Lamp
Thermostat Knob
Lower Shell
Hot Air Outlet
Handle Front Cord Wrap
Upper Shell
Fan Guard
Plessure Gauge
Handle Rear
Power Cord
Drain Plug
Power/Reset Switch

4
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
DFA-45T/70T DFA-125T DFA-170C DFA-210C
Wheel Support Frame NO YES YES YES
Wheel(Pneumatic, 10) NO NO YES YES
Wheel(Solid) NO YES NO NO
Cap-Wheel NO NO YES YES
Handle-Front NO YES YES YES
Handle-Rear NO NO YES YES
Axle NO YES YES YES
Handle YES NO NO NO
Cord Wrap NO NO YES YES
Hardware Kit : HW-KFA1000 YES NO NO NO
Hardware Kit : HW-KFA1010
NO YES NO NO
Hardware Kit : HW-KFA1012
NO NO YES YES
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.
Handle Screws
Hardware Kit Part No : HW-KFA1000
Hardware Kit Part No : HW-KFA1012
(DFA-170C/DFA-210C)
Hardware Kit Part No :
HW-KFA1010
(DFA-125T)
Wheels
(Pneumatic) Wheels (Solid)
Cap Wheels Cord Wrap
Screws-L&S
Flange Screws
Screws-L&S Flange Screws
Nuts
Washers
Washers
Split Pins
Nuts
Split Pins
Bushings
Figure 4. DFA-45T / DFA-70T MODELS
Figure 5. DFA-125T / DFA-170C / DFA-210C MODELS
Handle-Front
Handle-Rear
Axle
Wheel Support Frame

5
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
2. ASSEMBLY
A. For DFA-45T/DFA-70T Models Only (Figure 6)
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 in the upper shell and faces the hot air outlet.
2. Align the holes in the upper shell with the 2
mounting holes on the handle as shown in Figure 6.
3. Insert screws into the holes in the handle and tighten
each screw.
B. For DFA-125T / DFA-170C / DFA-210C Models Only (Figure 7, 8)
These models are furnished with wheels and handles
and cord wrap (DFA-170C/210C Models Only)
Wheels, handles, cord wrap and the mounting hardware are found in the shipping carton.
Tools Required
• Medium Phillips Screwdriver
• 5/16"(M5) open or Adjustable Wrench, Use US(Inch) Screws Nuts
• Long Nose Pliers
DFA-125T MODEL ONLY
1. Slide axle through wheel support frame. Install wheels on axle.
NOTE : When installing wheels, point extended hub of wheels toward wheel support frame
(See Figure 7)
2. Place Flat washers and split pin on axle ends and bend split pins with long nose pliers to secure.
3. Place heater on wheel support frame. Make sure air inlet end (rear) of heater is over wheels. Align the
holes on fuel tank flange with holes on wheel support frame.
4. Position the handle on top of fuel tank flange. Insert screws through handles, fuel tank flange, and
wheel support frames as shown in Figure 7 and attach nut finger tight after each screw is inserted.
5. After all screws are inserted, tighten nuts firmly.
CAUTION : DO NOT OPERATE heater without support frame assembled to tank.
Figure 6

6
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
Figure 7. Wheel and Handle Assembly, DFA-125T MODEL ONLY
NOTE : Heater should be inspected before each use, and at least annually by a qualitied service person.
DFA-170C/DFA-210C MODELS ONLY
1. Assembling wheel & handle
1) Slide axle through wheel support frame.
Install wheel bushingsm, wheel on axle.
NOTE : When installing wheels, tube valve should face out from supprot frame (See Figure 8).
2) Place flat washers and split pins on axle ends and bend split pins with long nose plier to secure.
3) Place wheel cap on flat washers and put wheel cap in flat washers end.
4) Place heater on wheel support frame. Make sure air lnlet end (Rear) of heater is over wheels.
Align the holes on fuel tank flange. Insert screws through handles (Front and Rear), fuel tank flange,
and wheel support frame as shown in figure 8 and attach nut finger tight after screw is inserted.
5) After all screws are inserted, tighten nuts firmly.
NOTE : The height of Front handle is higher than Rear handle.
2. Assembling Cord Wrap.
1) Align the hole on the handle (Front and Rear) with the mounting hole on the cord wrap (See Figure 8)
2) Insert screws through cord wrap, handles (Front and Rear) an shown in Figure 8 and attach nut finger
tight after each screw is inserted.
3) After all screws are inserted, tighten nuts firmly.
CAUTION : DO NOT OPERATE heater without support frame assembled to tank.
Hot Air Outlet
Fuel Tank Flange
Wheel Support
Nut
Split Pin
Wheel
Flat Washer
Screw-S
Screw-L
Flange Screw
Handle
Extended Hub

7
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 or #2 fuel oil (diesel fuel) 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 fuel oil is an acceptable substitute.)
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.
Figure 8. Wheel and Handle Assembly, DFA-170C / DFA-210C MODELS ONLY
Hot Air Outlet
Handle Front
Fuel Tank Flange
Wheel Support
Frame
Nut
Wheel(Pneumatic)
Split Pin
Flat Washer
Cap Wheel
Wheel Bushing
Axle
Air Inlet
Handle Rear
NUT
Screw-L
Screw-S
Cord Wrap
Flange Screw
Wheel Tube Valve

8
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
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 circuit breaker mounted to
the power switch that protects the PCB assembly 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.
Internal Shut-Off Temp. Reset Temperature
MODELS Plus/Minus 10 Degrees Plus/Minus 10 Degrees
DFA-125T / DFA-170C 230˚F/110˚C 194˚F/90˚C
DFA-45T / DFA-70T 176˚F/80˚C 122˚F/50˚C
DFA-210C 194˚F/90˚C 140˚F/60˚C
FUSE TYPE: All Models 125 volt / 8 amps

9
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
6. FUELING YOUR HEATER
NEVER FILL THE HEATER FUEL TANK IN THE LIVING SPACE : 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 TANK WHEN 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 DFA-210C 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) and
push power switch to ON” position, power indicator lamp will light and heater will start. 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.(See Figure9). If heater still does not start, see Troubleshooting Guide on page 18.
NOTICE : The major electrical components of this heater are protected by a safety fuse mounted to the
PCB board. If your heater fails to start, check this fuse first and replace as necessary.
You should also check your power source to insure that proper voltage and frequency are
being supplied to the heater.
Figure 9. DFA-45T / 70T / 125T / 170C / 210C MODELS
Power/Reset Switch
Lamp
Thermostat Control
Knob

10
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
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.
8. LONG TERM STORAGE OF YOUR HEATER
FUEL TANK DRAIN
1. Drain fuel tank through fuel cap opening. (For DFA-45T/70T Models Only)
2. Remove drain plug from rear bottom side of fuel tank by pulling plug grip downward and drain.
(For DFA-125T/170C/210C 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 DFA-45T/70T Models Only)
5. Reinstall Drain Plug as follows. (For DFA-125T/170C/210C Models Only. See Figure 11)
- Insert plug’s seal head fully into drain hole so that flange is flush to tank’s bottom.
- Insert seal cap fully into head hole so that cap flange is flush to head flange.
IMPORTANT : Reinstall plug fully into hole in tank, Otherwise it will not seal completely.
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.
Figure 8 Figure 9
Drain Plug
Plug Grip
Drain Hole
Seal Head
Head Hole
Seal Cap
Cap Flange
Head Flange
Fuel Tank
Head Flange
Rear bottom side
of Fuel Tank

11
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
A.) FUEL TANK
FLUSH EVERY 200 HOURS OF OPERATION
OR AS NEEDED (SEE STORAGE, PAGE 10)
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.
- Remove upper shell and fan guard (See Air Intake
Filter).
- Remove end filter cover screws using medium
phillips screwdriver.
- Remove end filter cover.
- Replace air output and lint filter.
- Reinstall end filter cover.
- 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.
Upper Shell
Fan Guard
Air Intake Filter
Flush
Motor Shaft
Fan Blade
Lint Filter
Intake Filter
Air Output Filter
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 12
Figure 13
Figure 14
End filter cover
Set screw
Motor Shaft

12
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
E.) NOZZLE
REMOVE DIRT IN NOZZLE AS NEEDED (SEE PAGE 17).
(For DFA-45T/70T/125T/170C Models Only)
- Remove upper shell (See page 11).
- Remove fan blade (See Fan Blades, page 11).
- 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 DFA-210C Model Only)
- Remove upper shell (See page 11).
- Remove fan (See page 11).
- Remove fuel and air line hoses from adaptor-nozzle.
- Remove ignitor wire from spark plug.
- Remove photocell from photocell bracket.
- Remove combustion chamber.
- 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.
- Replace combustion chamber.
- Attach ignitor wire to spark plug.
- Attach fuel and air line hoses from adaptor-nozzle.
- Attach photocell to photocell bracket.
- Reinstall fan blade and upper shell.
Combusion chamber
Fuel Line Hose
Air Line Hose
Fuel Line Fitting
Burner Head
Nozzle
Nozzle Face
Air Line Fitting
Burner Bracket
Screw Spark
Bracket
Photo Cell bracket
Photo Cell
Ignitor Wire
Fuel Line Hose
Burner Bracket
Spark Bracket
Fuel Line Fitting
Spark Plug
Air Line Fitting
Air Line Hose
Nozzle Face
Nozzle
Spark Plug
Figure 16
Figure 15
Spark Plug
Burner Head
Screw
Combustion Chamber

13
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
F.) SPARK PLUG
CLEAN AND REGAP EVERY 600 HOURS
OPERATION OR REPLACE AS NEEDED.
(For DFA-45T/70T/125T/170C Models Only)
- Remove upper shell (See page 11).
- Remove fan (See page 11).
- 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 DFA-210C Model Only)
- Remove upper shell (See page 11).
- Remove fan (See page 11).
- 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 11).
- Remove fan (See page 11).
- 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.
Burner Head
Gap
Spark Plug
Ignitor Wire
Spark Bracket
Spark Plug
Gap
Ignitor
Wire
Burner Bracket
Figure 17
Figure 18
Figure 19
Side CoverCircuit Board
Photocell
Wires
Photocell
Install Photocell
1)Incorrect
2)Correct
Photocell
lens

14
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
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 (DFA-45T/70T Models Only).
- Turn fuel filter 90˚ to clockwise and pull to remove (DFA-125T/170C/210C 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.
Figure 20
Fuel Line
Screws
Power Switch
Fuel Filter
Switch Wires

DFA-170C/210C MODELS ONLY
- Start heater (See Operation, page 9)
Allow motor to reach full speed.
- Adjust pressure (Using a flat blade screwdriver).
Turn relief valve to right to increase pressure.
Turn relief valve to left to decrease pressure.
Set pump pressre below correct for pressure for
each model.
- Stop heater (See Operation, page10)
I.) PUMP PRESSURE ADJUSTMENT
DFA-45T/70T/125T MODELS ONLY
- Remove pressure gauge plug from end filter cover.
- Install accessory pressure gauge.
- Start heater (See Operation, page 9)
Allow motor to reach full speed
- Adjust pressure (Using a flat blade screwdriver)
Turn relief valve to right to increase pressure.
Turn relief valve to left to decrease pressure.
Set pump pressure below correct for pressure for
each model.
- Stop heater (See Operation, page 10)
- Remove pressure gauge. Replace pressure gauge
plug in end filter cover.
15
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
NOTE : USE ONLY ORIGINAL EQUIPMENT REPLACEMENT PARTS.
Use of alternate or third party components will void any warranty and may cause unsafe
operation condition.
MODEL PUMP PRESSURE
DFA-45T 2.8 psi
DFA-70T 3.7 psi
DFA-125T 5.5 psi
MODEL PUMP PRESSURE
DFA-170C 6.5 psi
DFA-210C 8.5 psi
Pressure
Gauge Plug
Pressure Gauge
Relief Valve
Pressure Gauge
Relief Valve

16
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)
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
SIDE COVER
POWER SWITCH SWITCH WIRE
MAIN PCB ASSEMBLY
FUSE
FUSE HOLDER

17
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
11. TROUBLE SHOOTING GUIDE
Heater ignites but MAIN PCB 1. Wrong pump pressure 1. See Pump Pressure Adjustment,
assembly shuts heater off after page 16.
a short period of time. 2. Dirty Air Output, Air Intake 2. See Air Output, Air intake
(Lamp is flickering) and Lint Filter and Lint Filters, page 11.
3. Dirty Fuel Filter 3. See Fuel Filter, page 14.
4. Dirt in Nozzle 4. See Nozzle, page 12.
5. Dirty Photocell Lens 5. Clean Photocell Lens, page 13.
6. Photocell Assembly not 6. Make sure photocell boot is
properly installed. (Not properly seated in bracket,
seeing the flame) page 13.
7. Bad electrical connection 7. Check electrical components
between photocell and MAIN See wiring diagram, page 18.
PCB assembly
8. Defective photocell 8. Replace photocell, page 13.
Heater will not ignite but 1. No fuel in tank 1. Fill tank with kerosene
motor runs for a short period 2. Wrong pump pressure 2. See Pump Pressure Adjustment,
of time. (Lamp is flickering) page 16.
3. Carbon deposits on spark 3. See Spark Plug, page 13.
plug and/or improper gap
4. Dirty fuel filter 4. See Fuel Filter, page 14.
5. Dirt in nozzle 5. See Nozzle, page 12.
6. Water in fuel tank 6. Flush fuel tank with clean
kerosene, page 10.
7. Bad electrical connection 7. Check electrical connections,
between ignitor and MAIN See wiring diagram, page 18.
PCB assembly
8. Ignitor wire is not attached to 8. Attach ignitor wire to spark
spark plug plug. See Spark Plug, page 13.
9. Defective ignitor 9. Replace ignitor.
Fan does not turn when heater 1. Thermostat setting is too 1. Turn thermostat control knob
is plugged in and power switch low to a higher setting
was in the “ON” position 2. Bad electrical connection 2. Check electrical connections,
(Lamp is on or flickering) between motor and MAIN See Wiring Diagram, page 18.
PCB assembly
1. Temperature limit safety 1. Turn power switch to “OFF”
device is overheated and allow to cool (about 10 min.).
Then turn power switch to
Heater will not turn-on “ON” position.
(Lamp is off) 2. No electrical power 2. Check to insure heater cord and
extension cord are plugged in.
Check power supply.
3. Blown fuse 3. Replace safety fuse in PCB board.
4. Bad electrical connection between 4. Check electrical connections.
temperature limit safety device See Wiring Diagram, page 18.
and PCB board
TROUBLE POSSIBLE CAUSE CORRECTIVE ACTION

18
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
12. WIRING DIAGRAM
A) WIRING DIAGRAM (DFA-45T / 70T)
FUSE
8A/125VAC
BLACK
BLACK
AC120V
WHITE
GREEN
60Hz
LIMIT
CONTROL
PLUG
POWER POWER
SWITCH
EARTH
12uF/230VAC
BLACK
CAPACITOR
SPARK PLUG
GREEN
IGNITOR
MOTOR
PUMP
EARTH
BLK
WHT
CN3
MT-RED
MT-ORG
CN1(AC1)/
CN2(AC2)/
WHITE
BLACK
CN4
BLACK
WHITE
ORANGE
RED
BLACK
BLACK
WHITE
CN6
BLUE
ROOM
BLUE
THERMOSTAT
(LED)
POWER LAMP
CN5
BLACK
PHOTO
CELL BLACK
(TEMP. CONTROL)
SENSOR
CONTROL PCB
B) WIRING DIAGRAM (DFA-125T / DFA-170C / DFA-210C)
CN2(AC2)/ WHT
CN1(AC1)/ BLK
EARTH
PHOTO ROOM
BLACK BLUE
CN5 CN6
(TEMP. CONTROL)
EARTH
8A/125VAC
FUSE
CONTROL
LIMIT
SWITCH
POWER
POWER
BLACK
PLUG
60Hz
AC120V GREEN
BLACK
WHITE
BLACK
WHITE
BLACK
CELL BLUE
SENSOR
30uF/250VAC
CAPACITOR
BLACK
SPARK PLUG
IGNITOR
WHITE
BLACK
CN4
BLACK
MT-ORG
MT-RED
CN3
GREEN
RED
ORANGE
WHITE
PUMP
MOTOR
BLACK
POWER LAMP
(LED)
THERMOSTAT
CONTROL PCB

MODEL DFA-45T DFA-70T DFA-125T DFA-170C DFA-210C
BTU/Hr. 45,000 70,000 125,000 170,000 210,000
Fuel Consumption - Gal./Hr. 0.35 0.53 0.95 1.3 1.6
Fuel Tank Capacity - Gal. 5.0 5.0 10.0 13.0 13.0
Pump Pressure PSI 2.8 3.7 5.5 6.5 8.5
Volt/Hz 120Vac/60Hz 120Vac/60Hz 120Vac/60Hz 120Vac/60Hz 120Vac/60Hz
Amps 1.6 1.6 2.5 3.2 3.7
Phase 1 1 1 1 1
Size(W ) 11.75 31.9 16.7 11.75 31.9 16.7 19 36 23 23.9 43.3 26.6 23.9 43.3 26.6
Weight Lbs. 31.5 32 55 67 72
19
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
DFA-45T / DFA-70T
DFA-125T / DFA-170C / DFA-210C
31.9" 11.75"
16.7"
DW
H
26.6"
43.3"
23.9"
DFA-125T
DFA-170C
DFA-210C
23"
19"
36"
H
D
W
13. SPECIFICATIONS