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PROPANE CONSTRUCTION HEATER OWNER’S MANUAL Heater Size: 50,000 BTU/Hr 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. GENERAL HAZARD WARNING: FAILURE TO COMPLY WITH THE PRECAUTIONS AND INSTRUC- TIONS PROVIDED WITH THIS HEATER, CAN RESULT IN DEATH, SERIOUS BODILY INJURY AND PROPERTY LOSS OR DAMAGE FROM HAZARDS OF FIRE, EXPLOSION, BURN, ASPHYXIATION,...
CONTENTS SAFETY INFORMATION SECTION Safety Information ... 2 Product Identification ... 4 Unpacking ... 4 Theory of Operation ... 5 Propane Supply ... 5 Installation ... 6 Ventilation ... 7 Operation ... 7 Storage ... 9 Maintenance ... 9 Troubleshooting ... 10 Service Procedures ...
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SAFETY INFORMATION Continued 100585 WARNINGS Propane Gas: Propane gas is odorless. An odor-making agent is added to propane gas. The odor helps you detect a propane gas leak. However, the odor added to propane gas may fade. Propane gas may be present even though no odor exists. Make certain you read and understand all warnings.
PRODUCT IDENTIFICATION UNPACKING Hot Air Outlet (Front) Heater Base Piezo Ignitor Button Automatic Control Valve Button Hose /Regulator Assembly Figure 1 - 50,000 BTU/Hr Model 1. Remove all packing items applied to heater for shipment. Keep plastic cover caps (attached to inlet connector and hose/regulator assembly) for storage. 2.
THEORY OF OPERATION Clean Heated Air Out (Front) PROPANE SUPPLY 100585 The Fuel System: The hose/regulator assembly attaches to the propane gas supply. This provides fuel to the heater. The Air System: The motor turns the fan. The fan pushes air into and around the combustion chamber.
INSTALLATION Review and understand the warnings in the Safety Informa- tion Section, pages 2 and 3. They are needed to safely operate this heater. Follow all local codes when using this heater. Test all gas piping and connections for leaks after installa- tion or servicing.
VENTILATION OPERATION 100585 4. Open propane supply valve on propane tank(s) slowly. Note: If not opened slowly, excess-flow check valve on propane tank may stop gas flow. If this happens, close propane supply valve and open again slowly. 5. Check all connections for leaks. Apply mixture of liquid soap and water to gas joints.
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OPERATION Continued 5. Open propane supply valve on propane tank(s) slowly. Note: If not opened slowly, excess-flow check valve on propane tank may stop gas flow. If this happens, close propane supply valve and open again slowly. Be sure motor and fan are running before pushing in auto- matic control valve button.
STORAGE MAINTENANCE 100585 Disconnect heater from propane supply tank(s). 1. Store propane tank(s) in safe manner. See Chapter 5 of Standard for Storage and Handling of Liquefied Petroleum Gases, ANSI/NFPA 58 and/or CAN/CGA B149.2. Follow all local codes. Always store propane tanks outdoors. 2.
TROUBLE- SHOOTING Never service heater while it is plugged in, connected to propane supply, operating, or hot. Severe burns and electrical shock can occur. OBSERVED FAULT POSSIBLE CAUSE Fan does not turn No electrical power when heater is to heater plugged in.
SERVICE PROCEDURES Motor 1. Access ground screw through underside of heater base. Remove ground screw. Disconnect the green motor wire and the green power cord wire from underside of shell (see Figure 6). 2. Remove black and white motor wires from terminal board (see Figure 6).
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Motor (Continued) 10. Attach fan guard to new motor with three nuts. Tighten nuts firmly. 11. Place fan onto motor shaft of new motor. IMPORTANT: When placing fan onto motor shaft, make sure part number stamped on fan is facing motor. Attach fan nut to end of motor shaft.
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Ignitor 1. Remove motor and fan guard from heater (see Motor, page 11, steps 1 through 5). 2. Remove black ignitor wire from piezo ignitor. Access ignitor wire through underside of heater base (see Figure 11). Push wire up through bushing in heater shell.
SPECIFICATIONS WIRING DIAGRAMS Output Rating (BTU/Hr) Fuel Fuel Consumption Gallons/Hour Pounds/Hour Supply Pressure To Regulator Minimum (for purposes of input adjustment) Maximum Regulator Outlet Pressure Manifold Pressure Hot Air Output (CFM Approx) Motor Electric Input Amperage Ignition Weight (Pounds) Heater Shipping Size - L x W x H (Inches) Heater...
Fuel Gas Connector Connects regulator to all standard propane tanks. U.L. and A.G.A. listed. You may have further questions about this heater. If so, contact DESA International’s Technical Service Department at 1-800-323-5190. Use only original replacement parts. This heater must use design-specific parts.
WARRANTY AND REPAIR SERVICE 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.