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PORTABLE
FORCED
AIR HEATERS
OWNER’S MANUAL
Models: D20H, D30H, and D44H
IMPORTANT: Read and understand this manual before assembling, start-
ing or servicing heater. Improper use of heater can cause serious injury.
Keep this manual for future reference.
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D20H, D30H AND D44H MODELS PORTABLE FORCED AIR HEATERS c) All flame, including the pilot light, if • Use only in places free of flammable va- SAFETY any, shall be extinguished and the pors or high dust content. INFORMATION heater allowed to cool, prior to • Use only the electrical voltage and fre- fueling. quency specified on model plate. WARNINGS d) During fueling, all fuel lines and fuel- • Use only a three-prong, grounded exten- line connections shall be inspected for sion cord. IMPORTANT: Rea
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OWNER’S MANUAL PRODUCT UNPACKING 1. Remove all packing items applied to IDENTIFICATION heater for shipment. 2. Remove all items from carton. Hot Air Outlet 3. Check items for any shipping damage. If heater is damaged, promptly inform Upper Shell dealer where you bought heater. Fan Guard FUELS Air Filter Lower Shell End Cover WARNING: Use only kerosene or No. 1 fuel oil to avoid risk of fire Fuel Tank or explosion. Never use gasoline, naphtha, paint thinners, alcohol Fuel Cap or other highly flamm
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D20H, D30H AND D44H MODELS PORTABLE FORCED AIR HEATERS D20H Model Sleeve Cap Screw ASSEMBLY These models are furnished with wheels and Hot Air handles. Wheels, handles, and the mounting Outlet Handle hardware are found in the shipping carton. Fuel TOOLS NEEDED Air Tank Inlet Flange • Medium Phillips Screwdriver • 3/8" Open or Adjustable Wrench • Hammer 1. Slide axle through wheel support frame. Install wheels on axle. Axle IMPORTANT: When installing wheels, point extended hub of wheels toward wh
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OWNER’S MANUAL Extension Cord Wire Size THEORY OF OPERATION Requirements OPERATION WARNING: Review and un- Up to 30.5 meters (100 feet) long, use 1.0 2 derstand the warnings in the mm (16 AWG) conductor The Fuel System Safety Information section, page The air pump forces air through the air line. 30.6 to 61 meters (101 to 200 feet) long, use 2. They are needed to safely op- 2 The air is then pushed through the burner 1.5 mm (14 AWG) conductor erate this heater. Follow all local head nozzle. T
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D20H, D30H AND D44H MODELS PORTABLE FORCED AIR HEATERS STORING, PREVENTATIVE WARNING: Never service heater while it is plugged in, operating, or hot. TRANSPORTING, MAINTENANCE Severe burns and electrical shock can OR SHIPPING SCHEDULE occur. Note: If shipping, transport companies re- quire fuel tanks to be empty. Item How Often How To 1. Drain fuel tank. Fuel tank Flush every 150-200 hours of See Storing, Transporting, or Ship- Note: Some models have drain plug on operation or as needed. ping.
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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 1. No power to heater 1. Check circuit breaker in electrical panel is plugged in WARNING: High voltage! 2. Bad electrical connection between motor 2. Check all electrical connections. See and ignition control assembly or ignition Wiring Diagram, page 13 control as
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D20H, D30H AND D44H MODELS PORTABLE FORCED AIR HEATERS Upper Shell Upper SERVICE Shell Fan PROCEDURES Guard WARNING: Never service heater while it is plugged in, op- erating, or hot. Severe burns and electrical shock can occur. Fan UPPER SHELL REMOVAL Guard 1. Remove screws and lock washers along each side of heater using 5/16" nut- driver. These screws attach upper and lower shells together. Figure 7 - Upper Shell Removal, D20H Figure 8 - Upper Shell Removal, D30H 2. Lift upper shell off. Mode
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OWNER’S MANUAL 6. Remove combustion chamber. Stand 10. Replace combustion chamber. SERVICE combustion chamber on end with 11. Route the ignitor wires back down PROCEDURES nozzle adapter bracket on top (see Fig- through the hole in the lower shell. ure 12). Continued Connect wires to the ignition control 7. Remove ignitor screw with a 1/4" nut assembly. IGNITOR driver. Carefully remove ignitor from 12. Replace side cover (see Figure 9 or 10, 1. Remove upper shell and fan guard (see nozzle adapter
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D20H, D30H AND D44H MODELS PORTABLE FORCED AIR HEATERS Air Intake Filter SERVICE PROCEDURES Filter End Fan Guard Continued Cover AIR OUTPUT, AIR INTAKE, AND LINT FILTERS 1. Remove upper shell (see page 8). 2. Remove filter end cover screws using Lint Filter 5/16" nut-driver. Air Output 3. Remove filter end cover. Filter 4. Replace air output and lint filters. 5. Wash or replace air intake filter (see Preventative Maintenance Schedule, page 6). Figure 13 - Air Output, Air Intake, and Lint Filters, D2
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OWNER’S MANUAL Combustion FUEL AND AIR LINE SERVICE Chamber REPLACEMENT AND PROCEDURES Burner PROPER ROUTING Continued Strap 1. Remove upper shell (see page 8). NOZZLE ASSEMBLY 2. Remove side cover screws using 5/16" Air Line 1. Remove upper shell (see page 8). nut driver. Hose 2. Remove fan (see page 13). 3. Remove side cover. 3. Remove fuel and air line hoses from nozzle Nozzle/ 4. Inspect fuel and air line hoses for cracks assembly (see Figure 17, 18, or 19). Adapter and/or holes. If fuel lin
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D20H, D30H AND D44H MODELS PORTABLE FORCED AIR HEATERS Blade Air SERVICE Pump Intake Plate PROCEDURES Filter Continued Filter End Cover PUMP ROTOR (Procedure if Rotor is Binding) Fan Guard 1. Remove upper shell (see page 8). 2. Remove filter end cover screws using Insert 5/16" nut-driver. Rotor 3. Remove filter end cover and air filters. Air Output 4. Remove pump plate screws using 5/16" Filter nut-driver. 5. Remove pump plate. Figure 23 - Rotor Location, D20H Model 6. Remove rotor, insert, and bla
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OWNER’S MANUAL Fuse IGNITION CONTROL SERVICE Cover ASSEMBLY PROCEDURES (Procedure for Replacing Fuse) Fuse Clips Continued Fuse WARNING: High Voltage! FAN 1. Unplug heater IMPORTANT: Remove fan from motor shaft before removing motor from heater. 2. Remove side cover screws (4) using The weight of the motor resting on the fan 5/16" nut-driver to expose ignition con- could damage the fan pitch. trol assembly. 1. Remove upper shell (see page 8). 3. Remove fuse cover (see Figure 29). 2. Use 1/8" al
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D20H, D30H AND D44H MODELS PORTABLE FORCED AIR HEATERS 4 ILLUSTRATED PARTS BREAKDOWN 2 5 D20H MODEL 9-1 9-2 9-6 9-5 9 7 6 11 9-4 9-3 8 21 10 12 18 26 13 20 22 16 23 24 37 28 39 30 27 25 29 38 35 34 31 12-1 19 12-2 17 15 12-3 14 12-4 12-5 33 32 36 1 3 12-6 40 12-18 12-7 12-17 12-8 12-16 12-9 12-15 12-13 12-14 12-10 Motor and Pump Assembly 12-19 12-12 12-11 105843 14
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OWNER’S MANUAL This list contains replaceable parts used in your heater. When ordering parts, be sure to PARTS LIST provide the correct model and serial numbers (from the model plate), then the part number and description of the desired part. D20H MODEL KEY PART KEY PART NO. NUMBER DESCRIPTION QTY. NO. NUMBER DESCRIPTION QTY. 1 105793-01 ON/OFF Switch 1 12-19 105780-01 Plastic Cap 1 2 M50901-02BT Upper Shell 1 13 M51105-01 Fan Guard 1 3 079919-01 Switch Cover 1 14 079673-07 Power Cord 1 4 10
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D20H, D30H AND D44H MODELS PORTABLE FORCED AIR HEATERS 2 ILLUSTRATED PARTS 1 7-1 BREAKDOWN 7-2 7-6 7-3 D30H MODEL 3 7-4 7-5 9 7 10 4 5 16 6 8 11 19 23 24 12 28 15 25 18 26 20 27 22 29 21 41 30 42 31 37 43 10-1 13 35 33 10-2 34 14 10-3 36 17 44 10-5 32 10-4 39 40 38 10-6 14 10-17 10-7 10-8 10-16 10-15 10-9 10-13 10-14 10-10 10-13 10-11 Motor and Pump Assembly 10-12 105843 16
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OWNER’S MANUAL This list contains replaceable parts used in your heater. When ordering parts, be sure to provide the PARTS LIST correct model and serial numbers (from the model plate), then the part number and description of the desired part. D30H MODEL KEY PART KEY PART NO. NUMBER DESCRIPTION QTY. NO. NUMBER DESCRIPTION QTY. 1 098511-138 Upper Shell 1 15 NTC-4C Hex Lock Nut, 1/4-20 2 2 102432-01 Screw/Lockwasher, 1/2" 8 16 M51114-01 Fan Guard 1 3 098512-65 Combustion Chamber 1 17 M27417 Drain P
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D20H, D30H AND D44H MODELS PORTABLE FORCED AIR HEATERS 2 ILLUSTRATED PARTS 1 7-1 BREAKDOWN 7-2 7-6 7-3 D44H MODEL 3 7-4 7-5 9 7 10 4 5 16 6 8 11 19 23 24 12 28 15 25 18 26 20 27 22 29 21 41 30 42 31 37 43 10-1 13 35 33 10-2 34 14 10-3 36 17 44 10-5 32 10-4 39 40 38 10-6 14 10-17 10-7 10-8 10-16 10-15 10-9 10-18 10-14 10-10 10-13 10-11 Motor and Pump Assembly 10-12 105843 18
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OWNER’S MANUAL This list contains replaceable parts used in your heater. When ordering parts, be sure to provide the PARTS LIST correct model and serial numbers (from the model plate), then the part number and description of the desired part. D44H Model KEY PART KEY PART NO. NUMBER DESCRIPTION QTY. NO. NUMBER DESCRIPTION QTY. 1 098511-138 Upper Shell 1 14 104068-04 Ignition Control Assembly 1 2 102432-01 Screw/Lockwasher, 1/2" 8 15 NTC-4C Hex Lock Nut, 1/4-20 2 3 098512-66 Combustion Chamber 1 1
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D20H, D30H AND D44H MODELS PORTABLE FORCED AIR HEATERS WHEELS AND HANDLES 2 1 8 2 1 D30H and D44H Models D20H Model 7 3 5 4 5 6 4 7 3 6 KEY PART PART D20H D30H D44H NO. NUMBER DESCRIPTION QTY. QTY. QTY. 1 HA2203 Handles — 2 — HA2204 Handles —— 2 097198-02 Handles 1 —— 3 2 M12345-33 Screw, #10-24 x 1 /4"4 8 8 3 M12342-3 Wheel Support Frame — 1 — M12831-3 Wheel Support Frame —— 1 097197-02 Wheel Support Frame 1 —— 4 NTC-3C Hex Nut, #10-24 4 8 8 5 097896-01 Wheel 2 2 2 6 M28526 Cap Nut 2 2 2 7 M510
