PORTABLE FORCED AIR HEATER (WITH BUILT-IN THERMOSTAT) OWNER’S MANUAL 50 SIDE 150 SIDE HANDLE PFA/PV 005 Heater Sizes: 70,000 and 150,000 BTU/Hr 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 • 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 70,000 BTU/Hr Model Hot Air Outlet Upper Shell Lower Shell Fan Guard Air Filter End Cover Fuel Tank Fuel Cap Side Cover Flame Out Control Reset Button Power Cord 150,000 BTU/Hr Model Hot Air Outlet Upper Shell Lower Shell Fuel Cap Fan Guard Fuel Tank Side Cover Flame Out Control Reset Button Power Cord Thermostat Knob 4 Figure 1 - 70,000 and 150,000 BTU/Hr Models 100622
UNPACKING ASSEMBLY 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. The 150,000 BTU/Hr model is furnished with wheels and handles. Wheels, handles, and the mounting hardware are found in the shipping carton. Tools Needed • Medium Phillips Screwdriver • 3/8" Open or Adjustable Wrench • Hammer 1. Slide axle through wheel support frame. Install wheels on axle.
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 electronic ignitor sends voltage to the spark plug.
VENTILATION WARNING ICON G 001 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 three-square-foot opening of fresh, outside air for each 100,000 BTU/Hr rating. Provide extra fresh air if more heaters are being used.
OPERATION Continued To Stop Heater 1. Unplug extension cord from outlet. To Restart Heater 1. Wait 2 minutes after stopping heater. 2. Repeat steps under To Start Heater, page 7. 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.
TROUBLESHOOTING WARNING ICON G 001 WARNING Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur. OBSERVED FAULT POSSIBLE CAUSE REMEDY Heater ignites, but flame out control shuts off heater after a short period of time. Wrong pump pressure. See Pump Pressure Adjustment, page 11. Dirty air output, air intake and lint filters. See Air Output, Air Intake and Lint Filters, page 10. Dirty fuel filter. See Fuel Filter, page 11. Dirt in nozzle.
SERVICE PROCEDURES WARNING ICON G 001 WARNING Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur. Upper Shell 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. Upper Shell Fan Guard Fan Guard Fan IMPORTANT: Remove fan from motor shaft before removing motor from heater.
Pump Pressure Adjustment 1. Remove pressure gauge plug from filter end cover. 2. Install accessory pressure gauge (part number HA1180). 3. Start heater (see Operation, page 7). Allow motor to reach full speed. 4. Adjust pressure. Turn relief valve to right to increase pressure. Turn relief valve to left to decrease pressure. Correct Pump Pressure 70,000 BTU/Hr Model: 4.0 PSI 150,000 BTU/Hr Model: 5.0 PSI 5. Remove pressure gauge. Replace pressure gauge plug in filter end cover.
Spark Plug 1. Remove upper shell (see page 10). 2. Remove fan (see page 10). 3. Remove spark plug wire from spark plug. 4. Remove spark plug from burner head using 13/16" open-end wrench. 5. Clean and regap spark plug electrodes as follows: 70,000 BTU/Hr Model – .055" gap 150,000 BTU/Hr Model – .075" gap 6. Install spark plug in burner head. 7. Attach spark plug wire to spark plug. 8. Replace fan (see page 10). 9. Replace fan guard and upper shell.
Pump Rotor 70,000 BTU/Hr Model Blade (Procedure if rotor is binding) 1. Remove upper shell (see page 10). 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 16).
SPECIFICATIONS Output Rating (BTU/Hr.) 70,000 Fuel Use Only Kerosene or No. 1 Fuel Oil Fuel Tank Capacity (U.S. Gal.) 5.0 13.5 Fuel Consumption (Gal. Per Hr.) 0.52 1.10 Electric Requirements 120 V/60 Hz 120 V/60 Hz Amperage (Normal Run) 2.5 4.
MAINTENANCE KITS Kit 70,000 BTU/Hr Model 150,000 BTU/Hr Model Flame Out Control HA3003 HA3003 Spark Plug HA3012 HA3012 Filter Kit HA3014 HA3017 Nozzle Kit HA3008 HA3010 Rotor/Air Pump Kit HA3004 HA3004 Photocell HA3019 HA3019 Pump Adjustment HA3020 HA3020 Handle ACCESSORIES Purchase accessories and parts from your nearest dealer or service center. If they can not supply these accessories or parts, either contact your nearest Parts Central or DESA International for information.
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.