Table of Contents
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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.
®
G 004
ARL LOGO
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Table of Contents
Related Manuals for Desa and 55
Summary of Contents for Desa and 55
- Page 1 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.
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Page 2: Safety Information
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 care- fully and completely before try- ing to assemble, operate, or ser- vice this heater. Improper use of this heater can cause serious in- jury or death from burns, fire,... -
Page 3: Product Identification
PRODUCT IDENTIFICATION Hot Air Outlet Lower Shell Fuel Tank Side Cover Ignition Control Assembly (assembly on inside of side cover) Power Cord Figure 1 - 55,000 Btu/Hr Model Shown THEORY OF OPERATION The Fuel System: The air pump forces air through the air line. -
Page 4: Operation
35,000, 50,000, And 55,000 Btu/Hr H.S.I. Series PORTABLE FORCED AIR HEATERS OPERATION WARNING: Review and un- derstand the warnings in the Safety Information Section, page 2. They are needed to safely op- erate this heater. Follow all local codes when using this heater. -
Page 5: Troubleshooting
TROUBLESHOOTING FAULT CONDITION Motor does not start five seconds after heater is plugged in. Motor starts and runs but heater does not ignite. Heater ignites but ignition control assembly shuts heater off after a short period of time. 102388 OWNER’S MANUAL WARNING: Never service heater while it is plugged in, operating, or hot. -
Page 6: Service Procedures
35,000, 50,000, And 55,000 Btu/Hr H.S.I. Series PORTABLE FORCED AIR HEATERS SERVICE PROCEDURES WARNING: Never service heater while it is plugged in, op- erating, or hot. Severe burns and electrical shock can occur. UPPER SHELL REMOVAL 1. Remove screws along each side of heater using 5/16"... -
Page 7: Fuel Filter
SERVICE PROCEDURES Continued FUEL FILTER 1. Remove 4 side cover screws using 5/16" nut-driver. 2. Remove side cover. 3. Pull upper fuel line off fuel filter neck. 4. Carefully pry bushing and fuel filter out of fuel tank. 5. Wash fuel filter with clean fuel and re- place in tank. -
Page 8: Pump Rotor
35,000, 50,000, And 55,000 Btu/Hr H.S.I. Series PORTABLE FORCED AIR HEATERS SERVICE PROCEDURES Continued NOZZLE 1. Remove upper shell (see page 6). 2. Remove fan (see page 6). 3. Remove fuel and air line hoses from nozzle assembly (see Figure 11). -
Page 9: Specifications
PARTS NOT UNDER WARRANTY Contact authorized dealers of this product. If they can’t supply original replacement part(s), call DESA International’s Parts Dept. at 1-800-972-7879 for referral information. When calling DESA International, have ready • model number of your heater... -
Page 10: Wiring Diagrams
35,000, 50,000, And 55,000 Btu/Hr H.S.I. Series PORTABLE FORCED AIR HEATERS WIRING DIAGRAMS Black Motor Green Photocell White Figure 17 - Wiring Diagram For Heaters Using 102350-01 Ignition Control Assembly Ignitor Gray Gray Motor Black Green White Photocell Figure 18 - Wiring Diagram For Heaters Using 104040-02 Ignition Control Assembly... - Page 11 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.
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Page 12: Illustrated Parts Breakdown
35,000, 50,000, And 55,000 Btu/Hr H.S.I. Series PORTABLE FORCED AIR HEATERS ILLUSTRATED PARTS BREAKDOWN REM35B R35D B50H REM50C R55A REM55A 12-1 12-2 12-18 12-17 12-16 Motor and Pump Assembly 12-3 12-4 12-5 12-6 12-7 12-15 12-14 12-13 12-12 12-8 12-9... -
Page 13: Parts List
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 PART NUMBER DESCRIPTION... -
Page 14: Warranty And Repair Service
Should your heater require service, return it to your nearest authorized service center. Proof of purchase must be presented with the heater. The heater will be inspected. A defect may be caused by faulty materials or workmanship. If so, DESA International will repair or replace the heater without charge.