PORTABLE FORCED AIR HEATERS OWNER’S MANUAL Heater Sizes: 70,000 110,000 150,000 BTU/Hr Featuring: Built-In Thermostat with LCD Display 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.
CONTENTS SECTION PAGE Safety Information ......................................................................... 2 Product Identification .................................................................... 4 Unpacking ..................................................................................... 5 Assembly ....................................................................................... 5 Theory of Operation ...................................................................... 6 Fuels ..
SAFETY INFORMATION Continued • 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. • Fueling a) Personnel involved with fueling shall be qualified and thoroughly familiar with the manufacturer's instructions and applicable federal, state, and local regulations regarding the safe fueling of heating units. b) Only the type of fuel specified on the heater's data plate shall be used.
PRODUCT IDENTIFICATION Hot Air Outlet Handle Upper Shell Lower Shell Fan Guard Air Filter End Cover Fuel Cap Side Cover Flame Control Display (see Figure 3, below) Fuel Tank Power Cord Figure 1 - 70,000 BTU/Hr Model Hot Air Outlet Upper Shell Lower Shell Fan Guard Fuel Cap Fuel Tank Side Cover Flame Control Display (see Figure 3, below) Power Cord Figure 2 - 110,00 and 150,000 BTU/Hr Models OFF Button ON/Reset Button Figure 3 - Flame Control Display 4 101697
UNPACKING ASSEMBLY (For 110,000 and 150,000 BTU/Hr Models Only) 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. These models are furnished with wheels and a front handle. Some models are furnished with a rear handle also. Wheels, handle(s), and the mounting hardware are found in the shipping carton.
THEORY OF OPERATION The Fuel System: The air pump forces air through the air line. The air is then pushed through the burner head 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. The Ignition System: The ignition system (part of the flame control) sends voltage to the spark plug.
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 a fresh air opening of at least three square feet for each 100,000 BTU/Hr rating. Provide extra fresh air if more heaters are being used.
OPERATION WITHOUT THERMOSTAT To Stop Heater Press (OFF) button. OFF Button Continued Figure 7 - OFF Button Location To Restart Heater Repeat steps under To Start Heater, page 7. OPERATION WITH THERMOSTAT ! WARNING Review and understand the warnings in the Safety Information Section. They are needed to safely operate this heater. Follow all local codes when using this heater. To Start Heater (with thermostat operation) 1. 2. 3. 4. Follow all ventilation and safety information.
7. Display alternates between “th” and the temperature selected. Heater has accepted the new thermostat setting. Press button to activate the new thermostat setting and start heater operation with thermostat. Figure 9 - Alternating Between “th” and the Temperature Selected NOTE: This thermostat has a 6˚F differential. Example: With thermostat set at 72˚F, the heater will cycle ON if the ambient temperature drops to 69˚F. The heater will cycle OFF when the ambient temperature rises to 75˚F.
STORAGE 1. Drain fuel tank. NOTE: Some models have drain plug on underside of fuel tank. If so, remove drain plug to drain all fuel. If heater does not have drain plug, drain fuel through fuel cap opening. Be sure all fuel is removed. 2. Replace drain plug if used. 3. Add one gallon of clean kerosene to fuel tank. 4. Attach fuel cap. 5. Move heater forwards and backwards to stir fuel. 6. Remove fuel cap or drain plug and drain fuel tank. Be sure all fuel is removed. 7. Replace fuel cap or drain plug.
TROUBLESHOOTING OBSERVED FAULT ! WARNING Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur. DISPLAY SCREEN Heater ignites, but flame control shuts off heater after a short period of time. Display shows “no fuel” (fuel lean). Display shows “C6” (sudden overfire). Display shows “C7” (fuel rich). Heater will not ignite, but motor runs for a short period of time. Display shows “no fuel” or “C8” (multiple ignition failures).
OBSERVED FAULT DISPLAY SCREEN Motor does not start when heater is plugged in, fan rotates slowly or does not turn. POSSIBLE CAUSE REMEDY Binding pump rotor If fan is hard to turn, see Pump Rotor, page 16. Voltage to heater less than 85 VAC Voltage to heater should be 105 to 132 VAC. Voltage to heater over 132 VAC Voltage to heater should be 105 to 132 VAC. Shorted photocell wires or defective photocell Correct wiring or replace photocell. Display shows “no fuel”. Display shows “LO volts”.
SERVICE PROCEDURES 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. ! WARNING Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur.
Air Intake Filter Air Output, Air Intake, and Lint Filters 1. Remove upper shell (see Upper Shell Removal, page 13). 2. Remove filter end cover screws using 5/16" nutdriver. 3. Remove filter end cover. 4. Replace air output and lint filters. 5. Wash or replace air intake filter (see Preventative Maintenance Schedule, page 10). 6. Replace filter end cover. 7. Replace fan guard and upper shell.
Fuel Filter, Bushing, and Lower Fuel Line Fuel Filter 1. Remove side cover screws using 5/16" nut-driver. 2. Remove side cover. 3. Pull upper fuel line off fuel filter neck. 4. Carefully pry bushing, fuel filter, and lower fuel line (110,000 and 150,000 BTU/Hr models only) out of fuel tank. 5. Wash fuel filter with clean fuel and replace in tank. 6. Attach upper fuel line to fuel filter neck. 7. Replace side cover.
Nozzle 1. Remove upper shell (see page 13). 2. Remove fan (see page 13). 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 head using 5/8" socket wrench (see Figure 23). 9.
Pump Rotor Blade (Procedure if rotor is binding) 1. Remove upper shell (see page 13). 2. Remove filter end cover screws using 5/16" nut-driver. 3. Remove filter end cover and air filters. 4. Remove pump plate screws 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 .003"/.004" if needed (see Figure 26).
SPECIFICATIONS Output Rating (BTU/Hr.) Fuel Fuel Tank Capacity (U.S. Gal.) Fuel Consumption (Gal. Per Hr.) Electric Requirements Amperage (Normal Run) Hot Air Output (CFM) 70,000 110,000 150,000 Use Only Kerosene or No. 1 Fuel Oil 5.0 9.0 13.5 .51 .82 1.10 120 V/60 Hz (Same All Models) 2.5 4.5 4.
MAINTENANCE KITS BTU/Hr 70,000 110,000 150,000 Spark Plug Part No. Filter Kit Part No. Nozzle Kit Part No. Rotor/Air Pump Kit Part No. Handle Part No. Photocell Part No. Pump Adjustment Part No. 102028-01 HA3014 HA3008 102028-01 HA3017 HA3022 102028-01 HA3017 HA3010 HA3004 — M16656-21 HA3004 HA2203 M16656-21 HA3004 HA2204 M16656-21 HA3020 HA3020 HA3020 ACCESSORIES Purchase accessories and parts from your nearest dealer or service center.
WARRANTY AND REPAIR SERVICE LIMITED WARRANTY DESA International warrants this product and any parts thereof, to be free from defects in materials and workmanship for six (6) months from the date of first purchase when operated and maintained in accordance with instructions. This warranty is extended only to the 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.
