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4

105843

PORTABLE FORCED AIR HEATERS

D20H, D30H AND D44H MODELS

ASSEMBLY

These models are furnished with wheels and
handles. Wheels, handles, and the mounting
hardware are found in the shipping carton.

TOOLS NEEDED

• Medium Phillips Screwdriver

• 3/8" Open or Adjustable Wrench

• Hammer

1.

Slide axle through wheel support
frame. Install wheels on axle.

IMPORTANT:

 When installing wheels,

point extended hub of wheels toward
wheel support frame (see Figure 3).

2.

Place cap nuts on axle ends. Gently tap
with hammer to secure.

3.

Place heater on wheel support frame.
For D20H model, make sure outlet end
(front) of heater is over wheels. For
D30H and D44H models, make sure air
inlet end (rear) of heater is over wheels.
Line up holes on fuel tank flange with
holes on wheel support frame.

4.

For D20H model, place rear handle on
top of fuel tank flange. For D30H and
D44H models, place front handle and
rear handle on top of fuel tank flange.
Insert screws through handle(s), fuel
tank flange, and wheel support frame.
Attach nut finger tight after each screw
is inserted.

5.

After all screws are inserted, tighten
nuts firmly.

Figure 3 - Wheel and Handle Assembly

Handle

Sleeve Cap

Screw

Hot Air
Outlet

Air
Inlet

Wheel Support
Frame

Wheel

Fuel
Tank
Flange

Cap Nut

Nut

Extended
Hub

Axle

Screw

Wheel
Support
Frame

Wheel

Cap Nut

Nut

Extended
Hub

Front
Handle

Axle

Rear
Handle

Air
Inlet

Fuel
Tank
Flange

Hot Air
Outlet

D20H Model

VENTILATION

 WARNING: Follow the mini-

mum fresh, outside air ventilation
requirements. If proper fresh, out-
side air ventilation is not provided,
carbon monoxide poisoning can
occur. Provide proper fresh, out-
side air ventilation before running
heater.

D30H and D44H Models

Provide a fresh air opening of at least 2800
square cm (three square feet) for each
100,000 Btu/Hr rating. Provide extra fresh
air if more heaters are being used.

Example:

  A 150,000 Btu/Hr heater requires

one of the following:

• a two-car garage door [4.9 m (16 ft.) open-

ing] raised 9 cm (3.5 inches)

• a single-car garage door [2.75 m (9 ft.)

opening] raised 15.25 cm (6 inches)

• two, 76 cm (30 inch) windows raised 28

cm (11 inches)

Summary of Contents for D20H

Page 1: ...derstand this manual before assembling start ing or servicing heater Improper use of heater can cause serious injury Keep this manual for future reference Models D20H D30H and D44H PORTABLE FORCED AIR HEATERS OWNER S MANUAL ...

Page 2: ... be outside the structure f All fuel storage shall be located a minimum of 762cm 25 feet from heaters torches welding equipment and similar sources of ignition exception the fuel reservoir integral with the heater unit g Whenever possible fuel storage shall be confined to areas where floor penetrations do not permit fuel to drip onto or be ignited by a fire at lower elevation h Fuel storage shall ...

Page 3: ...ng damage If heater is damaged promptly inform dealer where you bought heater FUELS WARNING Useonlykerosene or No 1 fuel oil to avoid risk of fire or explosion Never use gasoline naphtha paint thinners alcohol or other highly flammable fuels Do not use heavy fuels such as No 2 fuel oil or No 2 Diesel Using heavy fuels will result in clogged fuel filter and nozzle use of non toxic anti icer in fuel...

Page 4: ...through handle s fuel tank flange and wheel support frame Attach nut finger tight after each screw is inserted 5 After all screws are inserted tighten nuts firmly Figure 3 Wheel and Handle Assembly Handle Sleeve Cap Screw Hot Air Outlet Air Inlet Wheel Support Frame Wheel Fuel Tank Flange Cap Nut Nut Extended Hub Axle Screw Wheel Support Frame Wheel Cap Nut Nut Extended Hub Front Handle Axle Rear ...

Page 5: ...ustion chamber This air is heated and provides a stream of clean hot air The Ignition System The ignition control assembly provides power to the ignitor This ignites the fuel air mixture in the combustion chamber The Flame Out Control System This system causes the heater to shut down if the flame goes out Extension Cord Wire Size Requirements Up to 30 5 meters 100 feet long use 1 0 mm2 16 AWG cond...

Page 6: ...re heater in dry place Make sure storage place is free of dust and corrosive fumes IMPORTANT Do not store kerosene over summer months for use during next heating season Usingoldfuelcoulddamageheater PREVENTATIVE MAINTENANCE SCHEDULE How To SeeStoring Transporting orShip ping SeeAirOutput AirIntake andLint Filters page 10 SeeAirOutput AirIntake andLint Filters page 10 See Fuel Filter page 8 See Fan...

Page 7: ...ection between motor and ignition control assembly or ignition control assembly and power cord 3 Blown fuse on ignition control assembly 4 Binding pump rotor 5 Defective ignition control assembly 6 Defective motor 1 No fuel in tank 2 Pump pressure incorrect 3 Dirty fuel filter 4 Obstruction in nozzle assembly 5 Water in fuel tank 6 Bad electrical connection between ignitor and ignition control ass...

Page 8: ...er neck 7 Replace side cover FUEL FILTER D30H and D44H Models 1 Remove 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 lower fuel line and fuel filter out of fuel tank 5 Wash fuel filter with clean fuel and re place in tank 6 Attach upper fuel line to fuel filter neck 7 Replace side cover SERVICE PROCEDURES WARNING Nev...

Page 9: ...nitor Replacement CAUTION Donotbendorstrike ignitor element Handle with care 6 Remove combustion chamber Stand combustion chamber on end with nozzle adapter bracket on top see Fig ure 12 7 Remove ignitor screw with a 1 4 nut driver Carefully remove ignitor from nozzle adapter bracket 10 Replace combustion chamber 11 Route the ignitor wires back down through the hole in the lower shell Connect wire...

Page 10: ...low motor to reach full speed 4 Adjust pressure Turn relief valve to right to increase pressure Turn relief valve to left to decrease pressure See specifications below for correct pres sure for each model 5 Remove pressure gauge Replace pres sure gauge plug in filter end cover Figure 13 Air Output Air Intake and Lint Filters D20H Model Figure 15 Pressure Gauge Plug Removal Pressure Gauge Plug Pres...

Page 11: ...rap Continued Photocell Bracket Fuel Line Hose Nozzle Adapter Assembly Combustion Chamber Figure 19 Removing Air and Fuel Line Hoses D44H Model Only Burner Strap Photocell Bracket FUEL AND AIR LINE REPLACEMENT AND PROPER ROUTING 1 Remove upper shell see page 8 2 Remove side cover screws using 5 16 nut driver 3 Remove side cover 4 Inspect fuel and air line hoses for cracks and or holes If fuel line...

Page 12: ...ate air filters and filter end cover 11 Replace fan guard and upper shell 12 Adjust pump pressure see page 10 Note If rotor is still binding proceed as follows 13 Perform steps 1 through 6 above 14 Place fine grade sandpaper 600 grit on flat surface Sand rotor lightly in figure 8 motion four times see Fig ure 26 15 Reinstall insert and rotor 16 Perform steps 10 through 12 above Figure 23 Rotor Loc...

Page 13: ...9 0 34 13 5 51 1 Fuel Consumption Gal Per Hr Liters Per Hr 52 1 97 79 3 0 1 1 4 1 Electric Requirements 230 V 50 Hz Same All Models Amperage Normal Run 1 0 1 2 1 2 Hot Air Output CFM CMM 225 6 4 425 12 500 14 2 RPM 2850 2850 2850 SPECIFICATIONS Fan Flush SERVICE PROCEDURES Continued WIRING DIAGRAM Figure 30 Wiring Diagram IGNITION CONTROL ASSEMBLY Procedure for Replacing Fuse WARNING High Voltage ...

Page 14: ...1 12 13 16 9 2 9 1 9 3 9 4 9 5 17 18 19 20 21 22 23 24 26 27 28 29 30 34 35 32 33 9 6 15 14 31 3 1 36 40 38 37 39 25 ILLUSTRATED PARTS BREAKDOWN D20H MODEL Motor and Pump Assembly 12 11 12 18 12 17 12 16 12 15 12 14 12 13 12 12 12 10 12 1 12 3 12 4 12 5 12 6 12 7 12 8 12 9 12 2 12 19 ...

Page 15: ... 11 M10993 1 Pressure Relief Spring 1 12 12 M22997 Plug 1 12 13 M8940 Steel Ball 1 4 Diameter 1 12 14 M29612 01 Output Filter 1 12 15 M12461 31 Screw 10 32 x 1 6 12 16 103676 01 Nylon Elbow 90 1 12 17 M8643 Blade 4 12 18 FHPF3 5C Screw 10 32 x 5 8 2 KEY PART NO NUMBER DESCRIPTION QTY Not available as an assembly order parts separately 12 19 105780 01 Plastic Cap 1 13 M51105 01 Fan Guard 1 14 07967...

Page 16: ...12 15 25 27 24 28 20 22 21 30 31 17 14 14 35 36 32 26 13 18 5 4 6 7 8 7 2 7 1 7 5 7 4 7 3 7 6 43 42 41 33 34 37 40 39 44 38 29 ILLUSTRATED PARTS BREAKDOWN D30H MODEL Motor and Pump Assembly 10 1 10 2 10 3 10 4 10 5 10 6 10 7 10 8 10 9 10 10 10 11 10 12 10 13 10 14 10 15 10 16 10 17 10 13 ...

Page 17: ... Ignition Control Assembly 1 PARTS LIST D30H MODEL 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 Not available as an assembly order parts separately KEY PART NO NUMBER DESCRIPTION QTY 15 NTC 4C Hex Lock Nut 1 4 20 2 16 M51114 01 Fan Gu...

Page 18: ...12 15 25 27 24 28 20 22 21 30 31 17 14 14 35 36 32 26 13 18 5 4 6 7 8 7 2 7 1 7 5 7 4 7 3 7 6 43 42 41 33 34 37 40 39 44 38 29 ILLUSTRATED PARTS BREAKDOWN D44H MODEL Motor and Pump Assembly 10 1 10 2 10 3 10 4 10 5 10 6 10 7 10 8 10 9 10 10 10 11 10 12 10 18 10 14 10 15 10 16 10 17 10 13 ...

Page 19: ...Plug 1 PARTS LIST D44H Model 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 Not available as an assembly order parts separately KEY PART NO NUMBER DESCRIPTION QTY 14 104068 04 Ignition Control Assembly 1 15 NTC 4C Hex Lock Nut 1 4 20 2 ...

Page 20: ...me 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 M51015 01 Axle 1 M16801 2 Axle 1 M51015 04 Axle 1 8 078978 02 Sleeve Cap 2 Purchaseaccessoriesfromyourlocaldealer AIR GAUGE KIT HA1180 For all models Special tool to check pump pressure A 008 ACCESSORIES 1 2 3 5 6 4 7 IGNITION CONTROL ASSEMBLY PHOTOCELL TESTER HA1170 Special tool used...

Page 21: ...ared that these models conform to the Machinery Directive 98 37 EC including 91 368 EEC and the Low Voltage Directive 73 23 EEC It is further declared that these models conform to the EMC Directive 89 336 EEC amended by 92 31 EEC and including EN50081 1 and EN50082 1 We declare that the models noted are in conformity Company DESA International Inc Name Douglas D Rohrer Title Vice President Special...

Page 22: ...d to repairing or replacing at DESA International s option any parts which appear to DESA Interna tional upon inspection to have been defective in material or workmanship when shipped from the factory Such parts shall be provided at no cost to the user at the business establishment of any factory authorized service center or the factory during regular working hours The Warranty shall not apply to ...

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