Desa RJ45, RJ70 User Manual
PORTABLE
FORCED
AIR HEATER
OWNER’S MANUAL
Heater Sizes:
RJ45 And RJ70
IMPORTANT: Read and understand this manual before assembling, starting,
or servicing heater. Improper use of heater can cause serious injury. Keep
this manual for future reference.
RJ45 And RJ70
PORTABLE FORCED AIR HEATERS
SAFETY
INFORMATION
WARNINGS
IMPORTANT: Read this Owner’s
Manual carefully and completely
before trying to assemble, operate, or service this heater. Improper use of this heater can
cause serious injury or death from
burns, fire, explosion, electrical
shock, and carbon monoxide
poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
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 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, 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
avoid risk of fire or explosion. Never use
gasoline, naphtha, paint thinner, alcohol,
or other highly flammable fuels.
• Fueling
a)Personnel involved with fueling shall
be qualified and thoroughly familiar
with the manufacturer’s instructions
and applicable governing 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.
d)During fueling, all fuel lines and fuel-
line connections shall be inspected for
leaks. Any leaks shall be repaired prior
to returning the heater to service.
e)At no time shall more than one day’s
supply of heater fuel be stored inside
a building in the vicinity of the heater.
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 (exception: the fuel reservoir integral with
the heater unit).
g)Whenever possible, fuel storage shall
be confined to areas where floor penetrations do not permit fuel to drip
onto or be ignited by a fire at lower
elevation.
h) Fuel storage shall be in accordance
with the authority having jurisdiction.
• Never use heater where gasoline, paint
thinner, or other highly flammable vapors are present.
• Follow all local ordinances and codes
when using heater.
• Heaters used in the vicinity of tarpaulins, canvas, or similar enclosure materials shall be located a safe distance
from such materials. The recommended
minimum safe distance is 3 meters. It
is further recommended that these enclosure 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 frequency specified on model plate.
• Use only a three-prong, grounded extension cord.
• Minimum heater clearances from combustibles:
Outlet: 2.5 meters
Sides: 1.25 meters
Top: 1.25 meters
Rear: 1.25 meters
• Locate heater on a stable and level surface if heater is hot or running or a fire
may occur.
• When moving or storing heater, keep
heater in a level position or fuel spillage may occur.
• Keep children and animals away from
heater.
• Unplug heater when not in use.
• When used with thermostat, heater may
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.
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.
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PRODUCT IDENTIFICATION
OWNER’S MANUAL
Hot Air Outlet
Lower Shell
Fuel Gauge
Fuel Tank
ON/OFF Switch
Side Cover
Receptacle
Ignition Control Assembly
(assembly on inside of side cover)
Figure 1 - RJ45
Hot Air Outlet
Lower Shell
Handle
Upper Shell
Fan Guard
Air Filter
End Cover
Fuel Cap
Power Cord
Handle
Upper Shell
Fuel Gauge
Fuel Tank
Receptacle
Side Cover
ON/OFF Switch
Flame-Out Control Reset Button
Figure 2 - RJ70
Fan Guard
Air Filter
End Cover
Fuel Cap
Power Cord
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RJ45 And RJ70
PORTABLE FORCED AIR HEATERS
THEORY OF OPERATION
The Fuel System: The air pump forces air
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: The motor turns the fan.
The fan pushes air into and around the
combustion chamber. This air is heated and
provides a stream of clean, hot air.
Combustion Chamber
Ignitor or
Spark Plug
Clean
Heated
Air Out
Fuel
Tank
Figure 3 - Cross Section Operational View
Nozzle
Air For Fuel
System
The Ignition System (RJ45): The igni-
tion control assembly provides power to the
ignitor. This ignites the fuel/air mixture in
the combustion chamber.
The Ignition System (RJ70): The electronic 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.
Fuel
Filter
Air For Combustion
And Heating
Motor
Fan
Air Line
To Burner
Air Pump
Air Intake
Filter
Cool
Air In
Ignition
Control
Assembly or
Electronic
Ignitor
Fuel
Air
Output
Filter
FUELS
WARNING: Use only kerosene
or no. 1 fuel oil to avoid risk of fire
or explosion. Never use gasoline,
naphtha, paint thinners, alcohol,
or other highly flammable fuels.
Do not use heavy fuels such as diesel. Using
heavy fuels will result in:
• clogged fuel filter and nozzle
• the need of nontoxic anti-icer in fuel during very cold weather
IMPORTANT:
Use a KEROSENE ONLY
storage container. Be sure storage container is
clean. Foreign matter such as rust, dirt, or
water will cause the control to shut down the
heater. Foreign matter may also require you to
clean fuel system often.
VENTILATION
WARNING: Follow the minimum fresh, outside air ventilation requirements. If proper fresh,
outside air ventilation is not provided, carbon monoxide poisoning can occur. Provide proper
fresh, outside air ventilation before running heater.
Provide at least a 2800 square-centimeter
opening of fresh, outside air for each 25,000
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.
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OWNER’S MANUAL
OPERA TION
WARNING: Review and un-
derstand the warnings in the
Safety Information
2. They are needed to safely operate this heater. Follow all local
codes when using this heater.
TO START HEATER
1. Follow all ventilation and safety information.
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 Cord Wire Size
Requirements
• 2 to 3 meters long, use 1 mm2 cord
• 3 to 30 meters long, use 1.5 mm2 cord
• 30 to 60 meters long, use 2 mm2 cord
section, page
5. Plug extension cord into standard 100
volt/50 or 60 hertz grounded outlet.
6. Switch heater ON.
RJ45 Note:
five seconds, then heater will start.
RJ70 Note:
push in flame-out control reset button
(see Figure 2, page 3).
Ignitor will preheat for
If heater will not start,
TO STOP HEATER
1. Switch heater OFF.
2. Unplug extension cord from outlet.
TO RESTART HEATER
1. Switch heater OFF. Wait 10 seconds
(two minutes if heater has been running).
2. Switch heater ON.
RJ45 Note:
five seconds then heater will start.
RJ70 Note:
push in flame-out control reset button
(see Figure 2, page 3).
Ignitor will preheat for
If heater will not start,
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
or 2 liters of clean kerosene to tank, stir,
and drain again. This will prevent excess debris from clogging filters during future use.
3. Replace fuel cap. Properly dispose of old
and dirty fuel. Check with local automotive 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:
summer months for use during next heating
season. Using old fuel could damage heater.
Do not store kerosene over
PREVENTATIVE
MAINTENANCE
SCHEDULE
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.
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 operation or replace as needed
Clean each season or as needed
Not required/permanently lubricated
How To
See Storing, Transporting, or Shipping,
above
See Air Output, Air Intake, and Lint Filters,
page 8
See Air Output, Air Intake, and Lint Filters,
page 8
See Fuel Filter, page 9
See Spark Plug, page 10
See Fan, page 8
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RJ45 And RJ70
PORTABLE FORCED AIR HEATERS
TROUBLESHOOTING
RJ45
OBSERVED FAULT
Motor does not start five seconds after heater
is plugged in and switched ON
Motor starts and runs but heater does not
ignite
WARNING: Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
POSSIBLE CAUSE
1. No power to heater
WARNING: High voltage!
2. Bad electrical connection between motor and ignition control assembly or ignition 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
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, T ransporting, or
Shipping, page 5
Heater ignites but ignition control assembly
shuts heater off after a short period of time
WARNING: High voltage!
6. Bad electrical connection between ignitor 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 installed (not seeing the flame)
6. Dirty photocell lens
WARNING: High voltage!
7. Bad electrical connection between photocell and ignition control assembly
8. Defective photocell
9. Defective ignition control assembly
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 F il-
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
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