PORTABLE FORCED AIR HEATER OWNER’S MANUAL Heater Sizes: 35,000, 50,000, and 55,000 Btu/Hr H.S.I. Series 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.
35,000, 50,000, And 55,000 Btu/Hr H.S.I. Series PORTABLE FORCED AIR HEATERS SAFETY INFORMATION WARNINGS 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.
OWNER’S MANUAL PRODUCT IDENTIFICATION Hot Air Outlet FUELS Handle Upper Shell Lower Shell Fan Guard Air Filter End Cover Fuel Tank Fuel Cap Side Cover Ignition Control Assembly (assembly on inside of side cover) Figure 1 - 55,000 Btu/Hr Model Shown THEORY OF OPERATION 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.
35,000, 50,000, And 55,000 Btu/Hr H.S.I. Series PORTABLE FORCED AIR HEATERS OPERATION WARNING: Review and understand the warnings in the Safety Information Section, page 2. They are needed to safely operate this heater. Follow all local codes when using this heater. 5. TO START HEATER 1. 2. 3. 4. Follow all ventilation and safety information. Fill fuel tank with kerosene or No. 1 fuel oil. Attach fuel cap. Plug power cord of heater into threeprong, grounded extension cord.
OWNER’S MANUAL TROUBLESHOOTING WARNING: Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur. FAULT CONDITION POSSIBLE CAUSE REMEDY Motor does not start five seconds after heater is plugged in. 1. No power to heater 1. Check circuit breaker in electrical panel. WARNING: High voltage! 2. Bad electrical connection between motor and ignition control assembly or ignition assembly and power cord 3.
35,000, 50,000, And 55,000 Btu/Hr H.S.I. Series PORTABLE FORCED AIR HEATERS PUMP PRESSURE ADJUSTMENT SERVICE PROCEDURES Fan 1. Motor WARNING: Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur. 2. 3. Flush 4. UPPER SHELL REMOVAL 1. 2. 3. Motor Shaft Remove screws along each side of heater using 5/16" nut-driver. These screws attach upper and lower shells together. Lift upper shell off. Remove fan guard.
OWNER’S MANUAL SERVICE PROCEDURES Continued 2. 3. 4. 5. 6. 7. 1. Remove upper shell and fan guard (see page 6). Remove fan (see page 6). Remove 4 side cover screws with a 5/16" nut driver. Remove side cover (see Figure 8). Disconnect ignitor wires (gray) from ignition control assembly (see Figure 9). Pull the ignitor wires up through the hole in the lower shell. Disconnect fuel line hose and air line hose. Remove photocell from photocell bracket (see Figure 9). Remove combustion chamber.
35,000, 50,000, And 55,000 Btu/Hr H.S.I. Series PORTABLE FORCED AIR HEATERS NOZZLE 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Nozzle Seal Nozzle Adaptor Bracket Continued 1. 2. 3. Nozzle Face Combustion Chamber SERVICE PROCEDURES Remove upper shell (see page 6). Remove fan (see page 6). Remove fuel and air line hoses from nozzle assembly (see Figure 11). Turn nozzle adapter 1/4 turn to left and pull toward motor to remove (see Figure 13). Place nozzle adapter into vise and lightly tighten.
OWNER’S MANUAL SPECIFICATIONS Output Rating (Btu/Hr) Fuel Fuel Tank Capacity (U.S. Gal.) Fuel Consumption (Gal. Per Hr.) Electric Requirements Amperage (Normal Run) Motor Speed (RPM) Motor Horsepower (hp) Hot Air Output (CFM) Pump Pressure (psi) Shipping Weight (Approximate Pounds) Heater Weight without Fuel (Approximate Pounds) 35,000 50,000 55,000 Use Only Kerosene or No. 1 Fuel Oil 3.0 4.0 5.0 .26 .40 .40 120 V/60 Hz (All Models) 2.0 2.0 2.0 1725 1725 1725 1/15 1/15 1/15 165 175 175 3.0 3.6 3.
35,000, 50,000, And 55,000 Btu/Hr H.S.I.
OWNER’S MANUAL 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 referral information. Parts Centrals are listed in the Authorized Service Center booklet supplied with heater. DESA International P.O.
35,000, 50,000, And 55,000 Btu/Hr H.S.I.
OWNER’S MANUAL PARTS LIST This list contains replaceable parts used in your heater. When ordering parts, be sure to provide the correct model and serial numbers (from the model plate), then the part number and description of the desired part. REM35B, R35D, B50H, REM50C, R55A, REM55A KEY NO.
WARRANTY AND REPAIR SERVICE KEEP THIS WARRANTY Model No. Serial No. Date of Purchase (To be filled in by purchaser) LIMITED WARRANTY DESA International warrants this product and any parts thereof, to be free from defects in materials and workmanship for one (1) year 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.