DuraHeat DFA-125 User Manual Download Page 8

7

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.

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.

Once the temperature falls below the reset temperature you will be able to start your heater.

Internal Shut-Off Temp.

Reset Temperature

MODELS

Plus/Minus 10 Degrees

Plus/Minus 10 Degrees

DFA-125

230˚F/110˚C

194˚F/90˚C

DFA-45/DFA-70

176˚F/80˚C

122˚F/50˚C

FUSE TYPE:

All Models

125 volt / 8 amps

Summary of Contents for DFA-125

Page 1: ...ERS 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 th...

Page 2: ...des topandrear 4feet 125cm NEVER block air inlet rear orair outlet front of heater NEVER useduct work in frontor behindof heater NEVER moveor handle heater whilestillhot NEVER transport heater withfue...

Page 3: ...OUBLE SHOOTING GUIDE 14 12 WIRING DIAGRAM 15 13 SPECIFICATIONS 16 14 EXPLODED PARTS DRAWING 17 15 PARTS LIST 18 1 INTRODUCTION Please read this USER S MANUAL carefully It will show you how to assemble...

Page 4: ...LEAVE THE HEATER UNATTENDED WHILE BURNING Figure 2 DFA 125 MODEL Drain Plug Fuel Gauge Lower Shell Hot Air Outlet Power Reset Switch Power Cord Fan Guard Upper Shell Handle Fuel Cap Lamp Side Cover Fu...

Page 5: ...A1010 No No Yes Handle Wheel Support Frame Axle Figure 3 DFA 45 DFA 70 MODEL Figure 4 DFA 125 MODEL Handle Screws Hardware Kit Part No HW KFA1000 3 UNPACKING AND ASSEMBLY 1 REMOVE THE HEATER AND ALL P...

Page 6: ...hillips Screwdriver 5 16 M5 Open or Adjustable Wrench Use Us Inch Screws Nut Long Nose Pliers 1 Slide axle through wheel support frame Install wheels on axle NOTE When installing wheels point extended...

Page 7: ...ners 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 fue...

Page 8: ...he 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 de...

Page 9: ...d six inches 15 24 cm a single car garage door raised nine inches 22 86 cm two thirty inch 76 20 cm windows raised twelve inches 30 48 cm B OPERATION TO START HEATER 1 Fill fuel tank with kerosene or...

Page 10: ...erosene 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 45 65 Models Only 5 Reinstall Drain...

Page 11: ...rd 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...

Page 12: ...l and air line hoses to burner head Reinstall fan blade and upper shell F SPARK PLUG CLEAN AND REGAP EVERY 600 HOURS OPERATION OR REPLACE AS NEEDED Remove upper shell See page 10 Remove fan See page 1...

Page 13: ...FA 125 model Wash fuel filter with clean fuel and replace in tank Attach fuel line to fuel filter neck Reinstall side cover I PUMP PRESSURE ADJUSTMENT Remove pressure gauge plug from end filter cover...

Page 14: ...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 Remove fuse from fuse holder...

Page 15: ...improper gap 4 Dirty fuel filter 4 See Fuel Filter page 12 5 Dirt in nozzle 5 See Nozzle page 11 6 Water in fuel tank 6 Flush fuel tank with clean kerosene page 9 7 Bad electrical connection 7 Check...

Page 16: ...15 NEVER LEAVE THE HEATER UNATTENDED WHILE BURNING 12 WIRING DIAGRAM A WIRING DIAGRAM DFA 45 DFA 70 B WIRING DIAGRAM DFA 125...

Page 17: ...ODEL NUMBER AND PART NUMBER WHEN ORDERING PARTS 15 5 15 4 Burner Head Assembly 15 3 15 6 15 1 15 2 1 23 3 18 20 7 2 4 6 22 1 22 2 22 3 12 10 12 11 14 15 9 16 17 24 25 11 19 5 22 21 1 1 8 13 16 1 16 2...

Page 18: ...KFA1027 SP KFA1003 15 2 NozzleSealWasher 285 8109 90 285 8109 90 285 8109 90 15 3 NozzleSealSpring 285 8110 00 285 8110 00 285 8110 00 15 4 BurnerHead 284 7112 00 3531 0015 00 284 7112 11 15 5 SparkPl...

Page 19: ...bly 215A 0019 00 215A 0019 00 215A 0019 00 22 1 Fuse 3920 0025 00 3920 0025 00 3920 0025 00 22 2 P C B Supportor R 3221 0030 00 3221 0030 00 3221 0030 00 22 3 P C B Supportor L 3221 0031 00 3221 0031...

Page 20: ...073 00 3231 0073 00 1 2 HardwareKit HW KFA1000 HW KFA1000 1 KEYNO DESCRIPTION PARTNO DFA 125 QTY 1 Handle 3551 0023 00 1 2 WheelSupportFrame 3551 0014 00 1 3 Axle 3541 0026 00 1 4 Wheel 2156 0003 00 2...

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