Desa PORTABLE FORCED AIR HEATERS Owner's Manual

Portable forced air heaters

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PORTABLE
FORCED
AIR HEATERS
OWNER'S MANUAL
Heater Sizes:
35,000 50,000 55,000 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.
®
G 004
ARL LOGO

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Summary of Contents for Desa PORTABLE FORCED AIR HEATERS

  • Page 1 PORTABLE FORCED AIR HEATERS OWNER’S MANUAL Heater Sizes: 35,000 50,000 55,000 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. ® G 004 ARL LOGO...
  • Page 2: Table Of Contents

    CONTENTS SAFETY INFORMATION SECTION Safety Information ... 2 Product Identification ... 4 Unpacking ... 4 Theory of Operation ... 4 Fuels ... 5 Ventilation ... 5 Operation ... 5 Storing, Transporting, or Shipping ... 6 Preventative Maintenance Schedule ... 6 Troubleshooting ...
  • Page 3: Safety Information

    SAFETY INFORMATION Continued 102437 WARNINGS • 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 regula- tions regarding the safe fueling of heating units.
  • Page 4: Product Identification

    PRODUCT IDENTIFICATION UNPACKING THEORY OF OPERATION Clean Heated Air Out Fuel Tank Hot Air Outlet Lower Shell Fuel Tank Side Cover Flame-Out Control Reset Button Power Cord 1. Remove all packing items applied to heater for shipment. 2. Remove all items from carton. 3.
  • Page 5: Fuels

    FUELS VENTILATION OPERATION 102437 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 No. 2 fuel oil or No. 2 Diesel. Using heavy fuels will result in: •...
  • Page 6: To Stop Heater

    OPERATION Continued STORING, TRANSPORTING, OR SHIPPING PREVENTATIVE MAINTENANCE SCHEDULE 5. Plug extension cord into standard 120 volt/60 hertz, three-hole, grounded outlet. Heater will start when extension cord is plugged into outlet. If not, push in flame-out control reset button (see Figure 3). Flame-Out Control Reset Button...
  • Page 7: Preventative Maintenance Schedule

    PREVENTATIVE MAINTENANCE SCHEDULE Continued TROUBLE- SHOOTING 102437 Fuel filter Clean twice a heating season or replace as needed. Spark plug Clean and regap every 600 hours operation or replace as needed. Fan blades Clean each season or as needed. See Fan, page 9. Motor Not required/permanently lubricated WARNING...
  • Page 8: Service Procedures

    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. IMPORTANT: Remove fan from motor shaft before removing motor from heater.
  • Page 9: Pump Pressure Adjustment

    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 6). 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.
  • Page 10: Nozzle

    11.Tighten spark plug with spark plug mounting nut. 12.Release hex-body of spark plug from vise. 13.Replace burner strap onto combus- tion chamber. 14.Attach spark plug wire to spark plug. 15.Attach fuel and air line hoses to nozzle assembly. 16.Replace fan (see page 9). 17.Replace fan guard and upper shell.
  • Page 11: Pump Rotor

    Pump Rotor (Procedure if rotor is binding) 1. Remove upper shell (see page 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.
  • Page 12: Specifications

    (Approximate Pounds) Heater Weight without Fuel (Approximate Pounds) You may have further questions about installation, operation, or troubleshooting. If so, contact DESA International’s Technical Service Department at 1-800-323- 5190. Use only original replacement parts. This will protect your warranty coverage Note: for parts replaced under warranty.
  • Page 13: Maintenance Kits

    If they can not supply these accessories or parts, either contact your nearest Parts Central or DESA International for referral information. Parts Centrals are listed in the Autho- rized Service Center booklet supplied with heater.
  • Page 14: Illustrated Parts List

    ILLUSTRATED PARTS BREAKDOWN 12-1 12-2 12-18 12-17 12-16 12-15 Motor and Pump Assembly 12-3 12-4 12-5 12-6 12-7 12-8 12-14 12-13 12-12 12-11 12-9 12-10 102437...
  • Page 15 PARTS LIST PART DESCRIPTION NUMBER M51104-01 Handle 098511-36 Upper Shell (white) 098511-54 Upper Shell (yellow) 098511-67 Upper Shell (black) M11084-29 Screw, #10-16 x 3/4" 100647-01 Screw, #10-16 x 1/2" 098512-40 Combustion Chamber (35 model) 098512-32 Combustion Chamber (50/55 models) M10908-2 Screw, #6-32 x 3/8"...
  • Page 16: Warranty And Repair Service

    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.

This manual is also suitable for:

35,000 btu/hr50,000 btu/hr55,000 btu/hr

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