Desa RJ70 User manual

PORTABLE
FORCED
AIR HEATER
OWNER’S MANUAL
IMPORTANT:Readandunderstandthismanualbeforeassembling,starting,
or servicing heater. Improper use of heater can cause serious injury. Keep
this manual for future reference.
Heater Sizes:
RJ45 And RJ70

2
104950
PORTABLE FORCED AIR HEATERS
RJ45 And RJ70
UNPACKING
1. Remove all packing items applied to
heater for shipment.
2. Remove all items from carton.
3. Check items for shipping damage. If
heater is damaged, promptly inform
dealer where you bought heater.
Carbon Monoxide Poisoning: Early
signs of carbon monoxide poisoning re-
semble 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 heater serviced.
Some people are more affected by carbon
monoxide than others. These include preg-
nant women, persons with heart or lung
diseaseoranemia,thoseundertheinfluence
of alcohol, and those at high altitudes.
Make certain you read and understand all
Warnings. Keep this manual for reference.
It is your guide to safe and proper operation
of this heater.
• Use only kerosene or no. 1 fuel oil to
avoidrisk offire orexplosion. Neveruse
gasoline,naphtha, paintthinner, alcohol,
or other highly flammable fuels.
• Fueling
a)Personnelinvolved with fuelingshall
be qualified and thoroughly familiar
with the manufacturer’s instructions
andapplicablegoverning regulations
regarding the safe fueling of heating
units.
b)Only the type of fuel specified on the
heater’s data plate shall be used.
c)All flame shall be extinguished
and the heater allowed to cool,
prior to fueling.
IMPORTANT: Read this Owner’s
Manual carefully and completely
before trying to assemble, oper-
ate, or service this heater. Im-
proper use of this heater can
causeseriousinjuryordeathfrom
burns, fire, explosion, electrical
shock, and carbon monoxide
poisoning.
SAFETY
INFORMATION
DANGER: Carbon monoxide
poisoning may lead to death!
WARNINGS
d)During fueling,allfuel linesand fuel-
lineconnections shallbe inspectedfor
leaks.Anyleaks shallberepairedprior
to returning the heater to service.
e)At no time shall more than one day’s
supply of heater fuel be stored inside
abuilding in thevicinity of theheater.
Bulk fuel storage shall be outside the
structure.
f) All fuel storage shall be located a
minimum of 8 meters from heaters,
torches, welding equipment, and
similar sources of ignition (excep-
tion: the fuel reservoir integral with
the heater unit).
g)Whenever possible,fuelstorage shall
beconfinedto areas where floorpen-
etrations do not permit fuel to drip
onto or be ignited by a fire at lower
elevation.
h)Fuel storage shall be in accordance
withthe authorityhavingjurisdiction.
• Never use heater where gasoline, paint
thinner, or other highly flammable va-
pors are present.
• Follow all local ordinances and codes
when using heater.
• Heaters used in the vicinity of tarpau-
lins, canvas, or similar enclosure ma-
terials shall be located a safe distance
fromsuch materials.The recommended
minimum safe distance is 3 meters. It
is further recommended that these en-
closure materials be of a fire retardant
nature. These enclosure materials shall
be securely fastened to prevent them
from igniting or from upsetting the
heater due to wind action.
• Use only in well-vented areas. Before
using heater, provide at least a 2800
square-centimeter opening of fresh,
outside air for each 25,000 Kcal/Hr of
rating.
• Use only in places free of flammable
vapors or high dust content.
• Use only the electrical voltage and fre-
quency specified on model plate.
• Use only a three-prong, grounded ex-
tension cord.
• Minimum heater clearances from com-
bustibles:
Outlet: 2.5 meters
Sides: 1.25 meters
Top: 1.25 meters
Rear: 1.25 meters
• Locate heater on a stable and level sur-
face if heater is hot or running or a fire
may occur.
• When moving or storing heater, keep
heater in a level position or fuel spill-
age may occur.
• Keep children and animals away from
heater.
• Unplug heater when not in use.
• Whenusedwith thermostat, heatermay
start anytime.
• Never use heater in living or sleeping
areas.
• Never block air inlet (rear) or air outlet
(front) of heater.
• Never move, handle, refuel, or service
a hot, operating, or plugged-in heater.
• Never attach duct work to front or rear
of heater.

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104950
OWNER’S MANUAL
PRODUCT IDENTIFICATION
Figure 1 - RJ45
Handle
Fuel Cap
Lower Shell
Power Cord
Fuel Tank
Hot Air Outlet
Air Filter
End Cover
Fan Guard
Upper Shell
Side Cover
Ignition Control Assembly
(assembly on inside of side cover)
Handle
Fuel Cap
Lower Shell
Power Cord
Fuel Tank
Hot Air Outlet
Air Filter
End Cover
Fan Guard
Upper Shell
Side Cover
Flame-Out Control Reset Button
Fuel Gauge
Receptacle
ON/OFF Switch
Fuel Gauge
Receptacle
ON/OFF Switch
Figure 2 - RJ70

4
104950
PORTABLE FORCED AIR HEATERS
RJ45 And RJ70
Figure 3 - Cross Section Operational View
Fuel
Filter Air Line
To Burner
Air
Output
Filter
Air Pump
Air Intake
Filter
Cool
Air In
Fan
Combustion Chamber Ignitor or
Spark Plug
Motor
Clean
Heated
Air Out
Ignition
Control
Assembly or
Electronic
Ignitor
Air For Fuel
System Air For Combustion
And Heating Fuel
Nozzle
TheFuelSystem:Theairpumpforcesair
through the air line. The air is then pushed
through the nozzle. This air causes fuel to
lift from the tank. A fine mist of fuel is
sprayed into the combustion chamber.
The Air System: Themotor turnsthe fan.
The fan pushes air into and around the
combustion chamber. This air is heated and
provides a stream of clean, hot air.
Fuel
Tank
The Ignition System (RJ45): The igni-
tioncontrolassemblyprovidespower tothe
ignitor. This ignites the fuel/air mixture in
the combustion chamber.
The Ignition System (RJ70): The elec-
tronic ignitor sends voltage to the spark
plug. The spark plug ignites the fuel and air
mixture.
The Flame-Out Control System: This
system causes the heater to shut down if the
flame goes out.
THEORY OF OPERATION
WARNING:Useonlykerosene
orno.1fueloiltoavoidriskoffire
orexplosion.Neverusegasoline,
naphtha, paint thinners, alcohol,
or other highly flammable fuels.
FUELS
Donotuseheavyfuelssuchasdiesel.Using
heavy fuels will result in:
• clogged fuel filter and nozzle
• the need of nontoxic anti-icer in fuel dur-
ing very cold weather
IMPORTANT: Use a KEROSENE ONLY
storagecontainer.Besurestoragecontaineris
clean. Foreign matter such as rust, dirt, or
water will cause the control to shut down the
heater.Foreignmattermayalsorequireyouto
clean fuel system often.
WARNING: Follow the mini-
mum fresh, outside air ventila-
tionrequirements.Ifproperfresh,
outside air ventilation is not pro-
vided, carbon monoxide poison-
ing can occur. Provide proper
fresh, outside air ventilation be-
fore running heater.
VENTILATION
Provide at least a 2800 square-centimeter
openingoffresh,outsideairforeach25,000
Kcal/Hr rating. Provide extra fresh air if
more heaters are being used.
Example:
The RJ45 (11,900 Kcal/Hr) heater requires
a 1400 square-centimeter opening of fresh
outside air.
The RJ70 (17,600 Kcal/Hr) heater requires
a 2000 square-centimeter opening of fresh
outside air.

5
104950
OWNER’S MANUAL
Item
Fuel tank
Air output and lint filters
Air intake filter
Fuel filter
RJ45: Ignitor
RJ70: Spark Plug
Fan blades
Motor
WARNING: Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
STORING,
TRANSPORTING,
OR SHIPPING
Note: If shipping, transport companies re-
quire fuel tanks to be empty.
1. Drain fuel tank. Drain fuel through
drain-plug under tank. Be sure all fuel
is removed.
2. If any debris is noted in old fuel, add 1
or2liters of clean keroseneto tank, stir,
and drain again. This will prevent ex-
cess debris from clogging filters dur-
ing future use.
3. Replace fuelcap.Properlydisposeof old
and dirty fuel. Check with local auto-
motive service stations that recycle oil.
4. If storing, store heater in dry place.
Make sure storage place is free of dust
and corrosive fumes.
IMPORTANT: Do not store kerosene over
summer months for use during next heating
season.Usingoldfuelcoulddamageheater.
WARNING: Review and un-
derstand the warnings in the
Safety Information section, page
2. They are needed to safely op-
erate this heater. Follow all local
codes when using this heater.
TO START HEATER
1. Follow all ventilation and safety in-
formation.
2. Fill fuel tank with kerosene or no. 1
fuel oil.
3. Attach fuel cap.
4. Plug power cord of heater into
grounded extension cord. Extension
cord must be at least 2 meters long.
Extension CordWire Size
Requirements
• 2 to 3 meters long, use 1 mm2cord
• 3to30 meters long,use 1.5 mm2cord
• 30 to 60 meters long, use 2 mm2cord
OPERATION 5. Plug extension cord into standard 100
volt/50 or 60 hertz grounded outlet.
6. Switch heater ON.
RJ45 Note: Ignitor will preheat for
five seconds, then heater will start.
RJ70 Note: If heater will not start,
push in flame-out control reset button
(see Figure 2, page 3).
TO STOP HEATER
1. Switch heater OFF.
2. Unplug extension cord from outlet.
TO RESTART HEATER
1. Switch heater OFF. Wait 10 seconds
(twominutesifheaterhas beenrunning).
2. Switch heater ON.
RJ45 Note: Ignitor will preheat for
five seconds then heater will start.
RJ70 Note: If heater will not start,
push in flame-out control reset button
(see Figure 2, page 3).
PREVENTATIVE
MAINTENANCE
SCHEDULE
How To
See Storing, Transporting, or Shipping,
above
SeeAir Output, AirIntake,and Lint Filters,
page 8
SeeAirOutput, AirIntake,and Lint Filters,
page 8
See Fuel Filter, page 9
See Spark Plug, page 10
See Fan, page 8
How Often
Flush every 150-200 hours of operation or
as needed
Replace every 500 hours of operation or
once a year
Wash and dry with soap and water every
500 hours of operation or replace as needed
Clean twice a heating season or replace as
needed
No maintenance required
Clean and regap every 600 hours of opera-
tion or replace as needed
Clean each season or as needed
Not required/permanently lubricated

6
104950
PORTABLE FORCED AIR HEATERS
RJ45 And RJ70
TROUBLESHOOTING
RJ45 WARNING:Neverservice heater whileitispluggedin, operating, or
hot. Severe burns and electrical shock can occur.
REMEDY
1. Check circuit breaker in electrical panel
2. Check all electrical connections. See
Wiring Diagrams, page 12
3. If fan does not turn freely, see Pump Ro-
tor, page 11
4. Replace ignition control assembly
5. Replace motor
6. Replace ON/OFF switch
1. Fill tank with kerosene
2. See Pump Pressure Adjustment, page 8
3. See Fuel Filter, page 9
4. See Nozzle, page 10
5. Drain and flush fuel tank with clean
kerosene. See Storing, Transporting, or
Shipping, page 5
6. Check electrical connections. See Wir-
ing Diagrams, page 12
7. Replace ignitor, see page 9
8. Replace ignition control assembly
1. See Pump Pressure Adjustment, page 8
2. See Air Output, Air Intake, and Lint Fil-
ters, page 8
3. See Fuel Filter, page 9
4. See Nozzle, page 10
5. Make sure photocell boot is properly
seated in bracket
6. Clean photocell lens
7. Check electrical connections. See Wir-
ing Diagrams, page 12
8. Replace photocell
9. Replace ignition control assembly
OBSERVED FAULT
Motordoesnotstartfivesecondsafterheater
is plugged in and switched ON
Motor starts and runs but heater does not
ignite
Heaterignitesbutignitioncontrolassembly
shuts heater off after a short period of time
POSSIBLE CAUSE
1. No power to heater
2. Bad electrical connection between mo-
tor and ignition control assembly or ig-
nition assembly and power cord
3. Binding pump rotor
4. Defective ignition control assembly
5. Defective motor
6. Defective ON/OFF switch
1. No fuel in tank
2. Pump pressure incorrect
3. Dirty fuel filter
4. Obstruction in nozzle
5. Water in fuel tank
6. Bad electrical connection between igni-
tor and ignition control assembly
7. Defective ignitor
8. Defective ignition control assembly
1. Pump pressure incorrect
2. Dirty air intake, air output, and/or lint
filter
3. Dirty fuel filter
4. Obstruction in nozzle
5. Photocell assembly not properly in-
stalled (not seeing the flame)
6. Dirty photocell lens
7. Bad electrical connection between pho-
tocell and ignition control assembly
8. Defective photocell
9. Defective ignition control assembly
WARNING:Highvoltage!
WARNING:Highvoltage!
WARNING:Highvoltage!

7
104950
OWNER’S MANUAL
TROUBLESHOOTING
Continued
RJ70
WARNING:Never service heaterwhileitisplugged in, operating,or
hot. Severe burns and electrical shock can occur.
OBSERVED FAULT
Heater ignites, but flame-out control shuts
off heater after a short period of time
Heater will not ignite, but motor runs for a
short period of time
Motordoes notstartwhen heateris plugged
in and switched ON, fan rotates slowly or
does not turn
REMEDY
1. Make sure photocell boot is properly
seated in bracket
2. See Pump Pressure Adjustment, page 8
3. See Air Output, Air Intake and Lint Fil-
ters, page 8
4. See Fuel Filter, page 9
5. See Nozzle, page 11
6. Clean photocell lens
7. Replace flame-out control
8. Replace photocell
1. Fill tank with kerosene
2. See Pump Pressure Adjustment, page 8
3. See Spark Plug, page 10
4. See Fuel Filter, page 9
5. See Nozzle, page 11
6. Drain and flush fuel tank with clean
kerosene. See Storage,Transporting, or
Shipping,page 5
7. Make sure electronic ignitor mounting
is tight
8. Replace electronic ignitor
1. Press flame-out control reset button
2. If fan is hard to turn, see Pump Rotor,
page 11
3. Replace motor
4. Replace ON/OFF switch
5. Check circuit breaker in electrical panel
6. Check all electrical connections. See
Wiring Diagrams, page 12
POSSIBLE CAUSE
1. Photocell assembly not properly in-
stalled (seeing flame)
2. Wrong pump pressure
3. Dirty air output, air intake and lint filters
4. Dirty fuel filter
5. Dirt in nozzle
6. Dirty photocell lens
7. Defective flame-out control
8. Defective photocell
1. No fuel in tank
2. Wrong pump pressure
3. Carbon deposits on spark plug and/or
improper gap
4. Dirty fuel filter
5. Dirt in nozzle
6. Water in fuel tank
7. Electronic ignitor not grounded
8. Defective electronic ignitor
1. Flame-out control not reset
2. Binding pump rotor
3. Defective motor
4. Defective ON/OFF switch
5. No power to heater
6. Bad electrical connections
WARNING: High voltage!

8
104950
PORTABLE FORCED AIR HEATERS
RJ45 And RJ70
PUMP PRESSURE
ADJUSTMENT
1. Remove pressuregauge plug fromfilter
end cover.
2. Install accessory pressure gauge (part
number HA1180).
3. Start heater(seeOperation, page5).Al-
low motor to reach full speed.
4. Using a flat blade screwdriver, adjust
pressure. Turn relief valve to right to
increase the pressure. Turn relief valve
to left to decrease the pressure. Set
pump pressure as follows:
RJ45: 0.22 kg/cm2at 50 Hz.
0.24 kg/cm2at 60 Hz.
RJ70: 0.35 kg/cm2at 50 Hz.
0.38 kg/cm2at 60 Hz.
5. Remove pressure gauge. Replace pres-
sure gauge plug in filter end cover.
Figure 7 - Pressure Gauge Plug Removal
Figure 8 - Adjusting Pump Pressure
Pressure
Gauge
SERVICE
PROCEDURES
WARNING: Never service
heater while it is plugged in, op-
erating,orhot. Severe burns and
electrical shock can occur.
Figure 4 - Upper Shell Removal
Figure 6 - Air Output, Air Intake, and Lint
Filters
Figure 5 - Fan Cross Section
Upper Shell
Fan
Guard
UPPER SHELL REMOVAL
1. Remove screws along each side of
heater using 5/16" nut-driver. These
screws attach upper and lower shells
together.
2. Lift upper shell off.
3. Remove fan guard.
FAN
IMPORTANT: Removefanfrommotor
shaftbeforeremovingmotorfromheater.
The weight of the motor resting on the
fan could damage the fan pitch.
1. Remove upper shell (see above).
2. Use 1/8"Allenwrench to loosenset-
screwwhich holdsfantomotorshaft.
3. Slip fan off motor shaft.
4. Clean fanusingsoft clothmoistened
with kerosene or solvent.
5. Dry fan thoroughly.
6. Replace fan on motor shaft. Place
fan hub flush with end of motor
shaft (see Figure 5).
7. Place setscrew on flat of shaft.
Tighten setscrew firmly(7200-8900
grams/centimeter).
8. Replace fan guard and upper shell.
Fan
Motor
Flush
Setscrew
Motor
Shaft
Air Intake Filter
Filter End Cover
Fan Guard
Air Output Filter
Lint Filter
AIR OUTPUT, AIR INTAKE,
AND LINT FILTERS
1. Remove upper shell (see Upper Shell
Removal).
2. Remove filter end cover screws using
5/16" nut-driver.
3. Remove filter end cover.
4. Replace air output and lint filters.
5. Wash or replace air intake filter (see
Preventative Maintenance Schedule,
page 5).
6. Replace filter end cover.
7. Replace fan guard and upper shell.
IMPORTANT: Do not oil filters.
Relief Valve
Pressure
Gauge
Plug

9
104950
OWNER’S MANUAL
Fuel Filter
Side Cover Upper Fuel Line
Figure 9 - Fuel Filter Removal
FUEL FILTER
1. Remove side cover screws using 5/16"
nut-driver (see Figure 9).
2. Remove side cover.
3. Pull upper fuel line off fuel filter neck.
4. Carefully prybushingand fuel filterout
of fuel tank.
5. Wash fuel filter with clean fuel and re-
place in tank.
6. Attach upperfuel line tofuelfilter neck.
7. Replace side cover (see Figure 9).
SERVICE
PROCEDURES
Continued
IGNITOR (RJ45)
1. Remove upper shell and fan guard (see
Upper Shell Removal, page 8).
2. Remove fan (see Fan, page 8).
3. Remove side cover screws with a 5/16"
nut driver. Remove side cover (see Fig-
ure 9).
4. Disconnect ignitor wires from ignition
control assembly (see Figure 10). Pull
the ignitor wires up through the hole in
the lower shell.
5. Disconnect fuel line hose and air line
hose.Removephotocell from photocell
bracket (see Figure 10).
6. Remove combustion chamber. Stand
combustionchamber onend withnozzle
adapter bracket on top (see Figure 11).
7. Remove ignitor screw with a 1/4" nut
driver. Carefully remove ignitor from
nozzle adapter bracket.
CAUTION:Donotbendorstrike
ignitor element. Handle with care.
Figure 10 - Disconnecting Ignitor Wires
from Ignition Control Assembly
8. Carefully remove replacement ignitor
from styrofoam packing.
9. Carefully guide ignitor into opening in
nozzle adapter bracket. Do not strike
ignitorelement.Attach ignitor tonozzle
adapter bracket with screw using a 1/4"
nut driver (see Figure 11). Torque 1800
to3500grams/centimeters.Do notover
torque.
10. Replace combustion chamber.
11. Route the ignitor wires back down
through the hole in the lower shell.
Connect wires to the ignition control
assembly. See Wiring Diagrams, page
12, for correct terminal locations.
12. Replace side cover (see Figure 9).
13. Connect and route fuel line hose and
air line hose to nozzle assembly. See
Fuel and Air Line Replacement and
Proper Routing, page 10.
14. Replace photocell in photocell bracket.
Route wires between hoses and back
downthrough the holein thelowershell
with ignitor wires (see Figure 10).
15. Replace fan (see Fan, page 8).
16. Replace fan guard and upper shell (see
Upper Shell Removal, page 8).
Combustion
Chamber
Ignitor
Wires
(Gray)
Ignitor
Nozzle
Adapter
Bracket
Ignition
Control
Assembly
Side Cover
Photocell
Bracket
Photocell
Assembly
Air Line
Hose
Fuel
Line
Hose
Figure 11 - Ignitor Replacement
Combustion
Chamber
Photocell
Bracket
Ignitor
Ignitor
Screw
Nozzle
Adapter
Bracket
Nozzle Adapter
Bracket Opening
Ignitor
Element
Continued

10
104950
PORTABLE FORCED AIR HEATERS
RJ45 And RJ70
NOZZLE (RJ45)
1. Remove upper shell (see Upper Shell
Removal, page 8).
2. Remove fan (see Fan, page 8).
3. Remove fuel and air line hoses from
nozzle adapter.
4. Turn nozzle adapter 1/4 turn to left and
pull toward motor to remove.
5. Place nozzle adapter into vise and
lightly tighten.
6. Carefully unscrew nozzle from the
nozzleadapterusing5/8"socket wrench.
7. Blow compressed air through face of
nozzle. This will free any dirt in
nozzle area.
8. Inspect nozzle seal for damage.
Figure 14 - Removing Air and Fuel Line
Hoses
SERVICE
PROCEDURES
Continued
Figure 12 - Spark Plug Removal
Figure 13 - Spark Plug Gap
Spark Plug Wire
Burner
Head
Spark Plug
Gap
2.2 mm
Bend Here to Adjust Gap
SPARK PLUG (RJ70)
1. Remove upper shell (see Upper Shell
Removal, page 8).
2. Remove fan (see Fan, page 8).
3. Removesparkplugwirefromsparkplug.
4. Remove spark plug from burner head
using 13/16" open-end wrench.
5. Clean and regap spark plug electrodes
to 2.2 mm.
6. Install spark plug in burner head.
7. Attach spark plug wire to spark plug.
8. Replace fan (see Fan, page 8).
9. Replace fan guard and upper shell (see
Upper Shell Removal, page 8).
Fuel Line
Hose Nozzle
Adapter
Combustion
Chamber
Air Line
Hose
9. Screw nozzle into nozzle adapter until
nozzleseats. Tighten7200-8000grams/
centimeter using 5/8" socket wrench.
10. Install nozzle adapter into nozzle
adapter bracket.
11. Connect and route fuel line hose and
air line hose to nozzle assembly. See
Fuel and Air Line Replacement and
Proper Routing, page 10.
12. Replace fan (see Fan, page 8).
13. Replace fan guard and upper shell (see
Upper Shell Removal, page 8).
Figure 15 - Removing Nozzle Assembly
Nozzle
Adaptor
Bracket Nozzle
Adapter
Combustion
Chamber
Figure 16 - Nozzle and Nozzle Adapter
Nozzle Face
Nozzle
Nozzle Adapter
Air Line
Fitting Fuel Line
Fitting
Nozzle Seal
FUEL AND AIR LINE
REPLACEMENT AND
PROPER ROUTING
1. Remove upper shell (see Upper Shell
Removal, page 8).
2. Remove side cover screws using 5/16"
nut driver (see Figure 9, page 9).
3. Remove side cover.
4. Inspect fueland air linehoses for cracks
and/or holes. If fuel line hose is dam-
aged,disconnect from nozzleadapteror
burnerhead (see Figure14 or Figure18,
page 11) and from fuel filter (see Fuel
Filter, page 9). If air line hose is dam-
aged,disconnect from nozzleadapteror
burnerhead (see Figure14 or Figure18,
page 11) and from barb fitting on pump
end cover (see Figure 17).
5. Install new air and/or fuel line. Attach
one end of air line hose to barb fitting
on pump end cover (see Figure 17) and
the other end to nozzle adapter or
burner head (see Figure 14 or Figure
18,page11).Attachone endoffuel line
hose to fuel filter (see Fuel Filter, page
9) and the other end to nozzle adapter
(see Figure 14 or Figure 18, page 11).
Route air and fuel line approximately
as shown in Figure 14 (RJ45) or 18
(RJ70), page 11.
Note: Hoses are not to touch photocell
bracket.
6. Replace side cover.
7. Replace upper shell and fan guard (see
Upper Shell Removal, page 8).
Figure 17 - Air Hose to Barb Fitting
Pump End Cover
Barb
Fitting Air Hose
Ignitor and
Photocell
wires
through
this hole

11
104950
OWNER’S MANUAL
Sandpaper
Figure 22 - Sanding Rotor
Figure21-GapAdjustingScrewLocations
Figure 20 - Rotor Location
O
TOR PFA/P 056
Insert RotorAir Output
Filter
Blade
Pump Plate
Air Intake Filter
Filter End
Cover
Fan Guard
0.08/0.10 mm
Gap Measured
With Feeler
Gauge
Blade
Rotor
Gap Adjusting Screw
Gap Adjusting Screw
SERVICE
PROCEDURES
Continued
NOZZLE (RJ70)
1. Remove upper shell (see Upper Shell
Removal, page 8).
2. Remove fan (see Fan, page 8).
3. Remove fuel and air line hoses from
burner head.
4. Remove spark plug wire from spark
plug.
5. Remove spark plug from burner head
using 13/16" open-end wrench.
6. Remove three screws using 5/16" nut-
driver and remove burner head from
combustion chamber.
7. Place burner head into vise and lightly
tighten.
8. Carefully remove nozzle from burner
headusing5/8" socketwrench(see Fig-
ure 19).
PUMP ROTOR
(Procedure if Rotor is Binding)
1. Remove upper shell (see Upper Shell
Removal, page 8).
2. Remove filter end cover screws using
5/16" nut-driver.
3. Remove filter end cover and air filters.
4. Remove pumpplatescrews using 5/16"
nut-driver.
5. Remove pump plate.
6. Remove rotor, insert, and blades.
7. Check for debris in pump. If debris is
found, blow out with compressed air.
8. Install insert and rotor.
9. Check gap on rotor. Adjust to
0.08/0.10mm if needed(see Figure 21).
Note: Rotate rotor one full turn to in-
sure the gap is 0.08/0.10 mm at tight-
est position. Adjust if needed.
Figure 18 - Removing Burner Head
Burner Head
Spark Plug
Combustion
Chamber Spark
Plug
Wire
Screw
Air Line
Hose
Fuel Line Hose
Nozzle Seal
Nozzle Face
Nozzle
10. Install blades, pump plate, air filters,
and filter end cover.
11. Replace fan guard and upper shell.
12. Adjust pump pressure (see Pump Pres-
sure Adjustment, page 8).
Note: If rotor is still binding, proceed
as follows.
13. Perform steps 1 through 6, column 1.
14. Place fine gradesandpaper(600 grit) on
flatsurface.Sand rotorlightlyin “figure
8” motion four times (see Figure 22).
15. Reinstall insert and rotor.
16. Perform steps 10 through 12.
Burner Head Fuel Line
Fitting
Air Line Fitting
Figure 19 - Removing Nozzle
9. Blow compressed air through face of
nozzle. This will free any dirt in
nozzle area.
10. Inspect nozzle seal for damage.
11. Replace nozzle into burner head and
tighten firmly (14,300-19,600 grams/
centimeter).
12. Attach burner head to combustion
chamber.
13. Install spark plug in burner head.
14. Attach spark plug wire to spark plug.
15. Connect and route fuel line hose and
air line hose to burner head. See Fuel
and Air Line Replacement and Proper
Routing, page 10.
16. Replace fan (see Fan, page 8).
17. Replace fan guard and upper shell (see
Upper Shell Removal, page 8).

12
104950
PORTABLE FORCED AIR HEATERS
RJ45 And RJ70
Figure 23- Wiring Diagram For RJ70
WIRING DIAGRAMS
Figure 22- Wiring Diagram For RJ45
White Photo-
cell
Black
Blue Flame-
Out
Control
B
Reset
Button
R
Red
Blue
White
Spark Plug
Green/
Yellow
Black
Power Plug
100V/50 or 60 Hz
Green
White
White
White
Red
Green
Terminal
Board
Ignitor
Plug
Receptacle
Power On Switch
Black
Black Relay
Red
Red
Motor
Blue
Photocell
Power Plug
100V/50 or 60 Hz
IGNITOR
Ignitor
Blue
White
Red
Orange
Orange
Green
Motor
White
Black Black
ON/OFF
Switch Receptacle Black
AC NEUTRAL (L2)
PHOTOCELL
PHOTOCELL
MOTOR RETURN
MOTOR MAIN
120V (L1)
IGNITOR
Ignition Control
Assembly
Green
104040

13
104950
OWNER’S MANUAL
ACCESSORIES
Purchase accessories and parts from your
nearest dealer.
AIR GAUGE KIT - HA1180
Special tool to check pump pressure.
HEAVY DUTY WHEELS AND
HANDLE KIT - HA1202
For heavy duty applications. Makes your
heater even more portable and convenient.
A 008
IGNITION CONTROL
ASSEMBLY/PHOTOCELL
TESTER - HA1170
Special tool used to test the ignition control
assembly and photocell.
SPECIFICATIONS RJ45 RJ70
Maximum Output Rating (Kcal/Hr) 11,900 17,600
Fuel Use Only Kerosene or No. 1 Fuel Oil
Fuel Tank Capacity (liters) 15.1 18.9
Fuel Consumption (liters/Hr) 1.3 1.9
Electric Requirements 100V/50 or 60 Hz
Amperage (Normal Run) 3.7 3.0
Motor Speed (RPM at 50/60 Hz) 2850/3450 2850/3450
Motor Watts 93 93
Pump Pressure (kg/cm2at 50/60 Hz) 0.22/0.24 0.35/0.38

14
104950
PORTABLE FORCED AIR HEATERS
RJ45 And RJ70
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
9-1
9-2
9-3
9-4
9-5
17
18
19
20
21
22
23
24
25
26
27
28
29
30
34
35
36
32 38 33 31
42
41
40 39
37
ILLUSTRATED
PARTS BREAKDOWN
RJ45
Motor and Pump Assembly
12-1
12-2
12-18
12-4
12-3
12-17
12-16 12-5 12-6
12-15
12-8
12-9
12-10
12-7
12-14
12-13
12-11
12-12

15
104950
OWNER’S MANUAL
PARTS LIST
RJ45
This list contains replaceable parts used in your heater. When ordering parts, be sure to provide the correct
model and serial numbers (from the model plate), then the part number and description of the desired part.
KEY PART
NO. NUMBER DESCRIPTION QTY.
1 M51104-01 Handle 1
2 098511-36 Upper Shell 1
3 M11084-29 Screw, #10-16 x 3/4" 2
4 100647-01 Screw, #10-16 x 1/2" 6
5 098512-62 Combustion Chamber 1
6 M10908-2 Screw, #6-32 x 3/8" 2
7 103154-03 Photocell Bracket 1
8 M16656-23 Photocell Assembly 1
9 ∆Burner Head Assembly 1
9-1 100735-22 Nozzle Assembly 1
9-2 102548-04 Ignitor Kit 1
9-3 104056-01 Nozzle Adapter 1
9-4 102336-01 Nozzle Adapter Bracket 1
9-5 104023-01 Screw/Washer Assembly 1
10 M11084-26 Screw, #10-16 x 3/8" 2
11 097033-01 Fan 1
12 ∆Motor and Pump Assembly 1
12-1 102001-22 Motor 1
12-2 079975-02 Pump Body 1
12-3 M22009** Insert 1
12-4 M22456-1** Rotor 1
12-5 M29608 Pump End Cover 1
12-6 M29632 ⊕ Lint Filter 1
12-7 M29633 ⊕Intake Filter 1
12-8 M29609 Filter End Cover 1
12-9 M12461-31 Screw, #10-32 x 1" 3
12-10 M27694 ∞Adjusting Screw 1
12-11 M10993-1 ∞Pressure Relief Spring 1
12-12 M22997 ∞Plug 1
12-13 M8940 ∞Steel Ball, 1/4" Diameter 1
12-14 M29612-01 ⊕Output Filter 1
12-15 M12461-31 Screw, #10-32 x 1" 6
12-16 103676-01 Nylon Elbow, 90°1
12-17 M8643** Blade 4
KEY PART
NO. NUMBER DESCRIPTION QTY.
∆Not available as an assembly
** Included in Rotor Kit (Part No. HA3004)
⊕Included in Filter Kit (Part No. HA3014)
∞Included in Pump Adjustment Kit (Part No. HA3020)
12-18 FHPF3-5C Screw 2
13 M51105-01 Fan Guard 1
14 102330-01 Power Cord 1
15 099492-01 Strain Relief Bushing 1
16 NTC-4C Hex Lock Nut, 1/4-20 2
17 M11084-26 Screw, #10-16 x 3/8" 4
18 M50631 Rubber Bumper 2
19 097461-06AA Side Cover 1
20 101205-01 Motor Bracket 1
21 M30865-02 Bushing 1
22 M11271-8 Clip Nut 6
23 M50104-02 Bushing 1
24 M11084-26 Screw, #10-16 x 3/8" 6
25 M10908-14 Screw, #8-32 x 3/8" 1
26 098511-18 Lower Shell 1
27 M50814-06 Rubber Airline 1
28 079973-01 Fuel Line 1
29 M50876-02 Fuel Filter with bushing 1
30 M10990-3 Rubber Bushing 1
31 101695-01 Button Plug 1
32 102349-01 PCB Support 5
33 104068-02 Ignition Control Assembly 1
34 097702-01 Fuel Cap (Includes Gasket) 1
35 098513-100 Fuel Tank 1
36 M51108-01 Shell Heat-Shield 1
37 097190-05 Fuel Gauge 1
38 098226-01 On/Off Switch 1
39 097196-02 Switch Seal 1
40 097202-01 Receptacle 1
41 097274-01 Jumper Plug 1
42 097467-02 Button Plug 1
PARTS AVAILABLE - NOT SHOWN
104949-01 General Information Decal 1
103814-01 Wire Tie 1

16
104950
PORTABLE FORCED AIR HEATERS
RJ45 And RJ70
ILLUSTRATED PARTS
BREAKDOWN
RJ70
40
41
43
547 46
2
4
3
67
8
10
11
12
12
14
18
21
22
24
27
28
29
30
31
32
34
38
37 19
13 9
33
35 36
42
39
23
44
45
1
26
15 17
20
16
25
48
10-1
18-1
18-18
18-2 18-3
18-4
18-17
18-16 18-15
18-14
18-7
18-6
18-5
18-8
18-9
18-10
18-11
18-12
18-13
Motor and Pump Assembly
10-6
10-5
10-3
10-2 10-4
10-7
Burner Head Assembly
RJ70

17
104950
OWNER’S MANUAL
PARTS LIST
RJ70
∆Not available as an assembly
** Included in Rotor Kit (Part No. HA3004)
⊕Included in Filter Kit (Part No. HA3014)
∞Included in Pump Adjustment Kit (Part No. HA3020)
KEY PART PART
NO. NUMBER DESCRIPTION QTY.
18-17 M8643** Blade 4
18-18 FHPF3-5C Screw, #10-32 x 5/8" 2
19 M50050 Rubber Cap 1
20 NTC-4C Hex locknut 2
21 M50104-02 Bushing (wires) 1
22 M11084-26 Screw, #10-16 x 3/8" 6
23 098511-18 Lower Shell 1
24 M11271-8 Clip Nut 6
25 097061-01 Relay (motor start) 1
26 079010-18 Wire Assembly (red 16") 1
27 M10908-14 Screw, #8-32 x 3/8" 1
28 M29652-04 Rubber Airline 1
29 079973-01 Fuel Line 1
30 M16841-57 Wire Assembly (red 8 1/2") 1
31 M10990-3 Rubber Bushing 1
32 M50876-05 Fuel Filter Assembly 1
(Includes bushing)
33 102482-01 Electronic Ignitor 1
34 M11084-29 Screw, #10-16 x 3/4" 2
35 099125-03 Terminal Board 1
36 099157-01 Rivet 1
37 097702-01 Fuel Tank Cap 1
38 097997-02 Flame-Out Control 1
39 098513-57 Fuel Tank 1
40 097194-02AA Side Cover 1
41 M11084-26 Screw, #10-16 x 3/8" 4
42 099177-01 Hex Nut 1
43 097274-01 Jumper Plug 1
44 M9900-162 Wire Assembly (green 16") 1
45 M27417 Drain Plug 1
46 098226-01 ON/OFF Switch 1
47 097196-02 Switch Seal 1
PARTS AVAILABLE - NOT SHOWN
HA2210 Filler Neck Screen 1
102415-01 Wiring Decal 1
097204-22 Tradename Decal 1
097208-33 Nameplate Decal 1
M9900-170 Wire Assembly (Black 12") 2
KEY PART PART
NO. NUMBER DESCRIPTION QTY.
1 097190-01 Fuel Gauge 1
2 098511-36 Upper Shell 1
3 100647-01 Screw, #10-16 x 1/2" 6
4 098512-41 Combustion Chamber 1
5 097202-01 Receptacle 1
6 M16660 Photocell Bracket 1
7 M10908-2 Screw, #6-32 x 3/8" 2
8 HA3019 Photocell Assembly 1
9 102330-01 Power Cord 1
10 ∆Burner Head Assembly 1
10-1 100735-14 Nozzle 1
10-2 M10659-1 Nozzle Seal Washer 2
10-3 M10809-1 Nozzle Seal Spring 1
10-4 M8882 Nozzle Seal Sleeve 1
10-5 M51098-02 Burner Head Body 1
10-6 M50820-01 Barb Fitting 2
10-7 HA3012 Spark Plug 1
11 M11084-27 Screw, #10-16 x 1/2" 3
12 M30865-02 Bushing 2
13 099492-01 Strain Relief Bushing 1
14 097200-01 Fan 1
15 M50631 Rubber Bumper 2
16 M15823-39 Screw, #8-18 x 1/2" 2
17 101205-01 Motor and Relay Bracket 1
18 ∆ Motor and Pump Assembly 1
18-1 102001-12 Motor 1
18-2 079975-02 Pump Body 1
18-3 M22009** Insert 1
18-4 M22456-1** Rotor 1
18-5 M29608 End Pump Cover 1
18-6 M29632⊕Lint Filter 1
18-7 M29633⊕Intake Filter 1
18-8 M29609 End Filter Cover 1
18-9 M12461-31 Screw, #10-32 x 1" 3
18-10 M8940∞Steel Ball (1/4" Dia.) 1
18-11 M10993-1∞Pressure Relief Spring 1
18-12 M27694∞Adjusting Screw 1
18-13 M22997∞Plug 1
18-14 M29612-01⊕Output Filter 1
18-15 M12461-31 Screw, #10-32 x 1" 6
18-16 M50016 Elbow, 90˚ (Barb Fitting) 1
This list contains replaceable parts used in your heater. When ordering parts, be sure to provide the correct
model and serial numbers (from the model plate), then the part number and description of the desired part.

WARRANTY AND REPAIR SERVICE
WARRANTY SERVICE
Should your heater require service, return it to your
nearest authorized service center. Proof of purchase must
be presented with the heater. The heater will be inspected.
A defect may be caused by faulty materials or workman-
ship. If so, DESA International will repair or replace the
heater without charge.
REPAIR SERVICE
Return the heater to your nearest authorized service
center. Repairs not covered by the warranty will be billed
at standard prices.
Each Service Center is independently owned and operated.
We reserve the right to amend these specifications at any
time without notice.
Corporate Headquarters
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
LIMITED WARRANTY
DESA International warrants this product and any
parts thereof, to be free from defects in materials and
workmanship for one (1) year from the date of first
purchasewhenoperatedandmaintainedinaccordance
withinstructions.Thiswarrantyisextendedonlytothe
original retail purchaser, when proof of purchase is
provided.
This warranty covers only the cost of parts and labor
required to restore the product to proper operating
condition. Transportation and incidental costs associ-
ated with warranty repairs are not reimbursable under
this warranty.
Warranty service is available only through authorized
dealers and service centers.
This warranty does not cover defects resulting from
misuse, abuse, negligence, accidents, lack of proper
maintenance, normal wear, alteration, modification,
tampering, contaminated fuels, repair using improper
parts, or repair by anyone other than an authorized
dealer or service center. Routine maintenance is the
responsibility of the owner.
THIS EXPRESS WARRANTY IS GIVEN IN LIEU
OF ANY OTHER WARRANTY EITHER EX-
PRESSED OR IMPLIED, INCLUDING WARRAN-
TIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE.
DESA International assumes no responsibility for in-
direct, incidental or consequential damages. Some
states do not allow the exclusion or limitation of
incidental or consequential damages or limitations or
exclusions may not apply to you. This Limited War-
ranty gives you specific legal rights and you may also
have other rights which vary from state to state.
Model No.
Serial No.
Date of Purchase
(To be filled in by purchaser)
KEEP THIS WARRANTY
104950-01
Rev B
09/99
NOT A UPC
104950 01