Desa RJ45, RJ70 User Manual

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PORTABLE
FORCED
AIR HEATER
OWNER’S MANUAL
Heater Sizes:
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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