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PROPANE
CONSTRUCTION
HEATER
OWNER’S MANUAL
Heater Size: 50,000 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.
!
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,
CARBON MONOXIDE
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SECTION PAGE CONTENTS Safety Information ......................................................................... 2 Product Identification .................................................................... 4 Unpacking...................................................................................... 4 Theory of Operation ...................................................................... 5 Propane Supply .............................................................................. 5 Ins
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SAFETY ! WARNINGS Continued Propane Gas: Propane gas is odorless. An odor-making agent is added to propane INFORMATION gas. The odor helps you detect a propane gas leak. However, the odor added to Continued propane gas may fade. Propane gas may be present even though no odor exists. Make certain you read and understand all warnings. Keep this manual for reference. It is your guide to safe and proper operation of this heater. • Install and use heater with care. Follow all local ordinances and cod
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PRODUCT Hot Air Outlet (Front) IDENTIFICATION Shell Handle Motor Fan Guard Heater Base Piezo Ignitor Button Automatic Control Valve Inlet Button Connector Power Cord Hose /Regulator Assembly Figure 1 - 50,000 BTU/Hr Model 1. Remove all packing items applied to heater for shipment. Keep plastic cover UNPACKING caps (attached to inlet connector and hose/regulator assembly) for storage. 2. Remove all items from carton. 3. Check all items for shipping damage. If heater is damaged, promptly inform de
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The Fuel System: The hose/regulator assembly attaches to the propane gas THEORY OF supply. This provides fuel to the heater. 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. The Ignition System: The piezo ignitor lights the burner. The Automatic Control System: This system causes the heater to shut down if the flame goes out. Fan Combustion Chamber Motor Clean Heated Air Ou
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INSTALLATION ! WARNING 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. ! WARNING Test all gas piping and connections for leaks after installa- tion or servicing. Never use an open flame to check for a leak. Apply a mixture of liquid soap and water to all joints. Bubbles forming show a leak. Correct all leaks at once. 1. Provide propane supply system (see P
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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. Bubbles forming show a leak that must be corrected. WARNING ! Never use an open flame to check for a leak. Apply a mix- ture of liquid soap and water to all joints. Bubbles forming show a leak that must
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5. Open propane supply valve on propane tank(s) slowly. Note: If not opened OPERATION slowly, excess-flow check valve on propane tank may stop gas flow. If this Continued happens, close propane supply valve and open again slowly. ! WARNING Be sure motor and fan are running before pushing in auto- matic control valve button. Flames could flash outside heater if motor and fan are not running. 6. Push in and hold automatic control valve button (see Figure 5). Push piezo ignitor button (see Figure 5)
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STORAGE ! CAUTION 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. Place plastic cover caps over brass fittings on inlet connector and hose/regula- tor assembly. 3. Store in dry, clean, and safe place. Do not store hose/regulator assembly inside heater combustion chamber. 4. When t
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TROUBLE- ! WARNING 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 REMEDY Fan does not turn No electrical power Check voltage to electrical out- when heater is to heater let. If voltage is good, check plugged in. heater power cord for breaks. Fan hitting inside of Adjust motor/fan guard to keep heater shell fan from hitting inside of heater shell. Bend fan guard if nec
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SERVICE ! WARNING PROCEDURES Never service heater while it is plugged in, connected to propane supply, operating, or hot. Severe burns and elec- trical shock can occur. Motor 1. Access ground screw through underside of heater base. Remove ground screw. Disconnect the green motor wire and Ground Screw the green power cord wire from underside of shell (see Figure 6). Wire Guard Screws 2. Remove black and white motor wires from terminal Wire Guard board (see Figure 6). 3. Remove two wire guard scre
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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. Tighten fan nut firmly. 12. Place motor and fan guard Hole in Shell into rear of heater shell. for Motor Wires Carefully route motor wires through hole in shell (see Figure 10). 13. Insert three screws through Figure 10 - Replaci
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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 Piezo Ignitor from piezo ignitor. Access Bushing ignitor wire through Ignitor Wire underside of heater base (see Figure 11). Push wire Underside of up through bushing in Heater Base heater shell. 3. Remove ignitor mounting screw from rear head Figure 11 - Removing Ignitor Wire from Piezo Ignitor using nut-driver or stan- dard screwdriver (see Figure 12). 4. Remove ignitor from
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Output Rating (BTU/Hr) 49,500 SPECIFICATIONS Fuel Propane Vapor Only Fuel Consumption Gallons/Hour 0.5 Pounds/Hour 2.3 Supply Pressure To Regulator Minimum (for purposes 10 psi of input adjustment) Maximum Tank Pressure or 200 psi Regulator Outlet Pressure 18" WC Manifold Pressure 16" WC Hot Air Output (CFM Approx) 275 Motor 3300 RPM Electric Input 120 volt/60 hertz Amperage 2 Ignition Manual, Piezo Weight (Pounds) Heater 15.5 Shipping 17 Size - L x W x H (Inches) Heater 18.5 x 7.7 x 1
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Part Number Description ACCESSORIES LPA1020 10' Rubber Hose with Brass Fitting Purchase accessories and U.L. listed. parts from your nearest dealer or service center. If they can LPA2140 Propane Gas Regulator not supply an accessory or U.L. listed. part, either contact your nearest Parts Central (listed in LPA3055 Hose/Regulator Assembly the separate Authorized U.L. listed. Service Center booklet) or LPA4020 Fuel Gas Connector contact DESA International Connects regulator to all standard propane
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ILLUSTRATED PARTS BREAKDOWN 1 RUBBER WASHER FAN 2 NUT MOTOR 3 4 FAN MOTOR ASSEMBLY 7 5 6 2 16 10 19 9 39 8 21 38 20 18 26 39 26 28 41 17 12 22 35 11 37 33 14 21 31 24 29 17 32 13 40 11 36 15 23 25 34 27 30 16 100585
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This list contains replaceable parts used in your heater. When ordering parts, follow the PARTS LIST instructions listed under Replacement Parts on page 15 of this manual. KEY PART NO. NO. DESCRIPTION QTY. 1 099568-01 Inner Shell (Combustion Chamber) 1 2 M11084-26 Hex Tap Screw, #10-16 x 3/8" 7 3 099599-02AB Outer Shell (BLP50) 1 099599-02AC Outer Shell (RLP50) 1 099599-02AA Outer Shell (REM50LP) 1 4 M51104-01 Handle 1 5 099230-01 Hex Tap Shoulder Screw 4 6 M11084-29 Hex Tap Screw, #10-16 x 3/
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WARRANTY AND REPAIR SERVICE KEEP THIS WARRANTY 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. This warranty covers only the cost of parts and labor required to restore the product to proper operating co
