Desa D20N Owner'S Manual Download Page 1

Page: 1 / 24

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.

Models: D20N, D30N, and D44N

PORTABLE

FORCED

AIR HEATERS

OWNER’S MANUAL

Summary of Contents for D20N

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 D20N D30N and D44N PORTABLE FORCED AIR HEATERS OWNER S MANUAL ...

Page 2: ...e 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 be...

Page 3: ... any shipping 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 i...

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: ...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 com bustion chamber The Flame Out Control System This sys tem 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 conductor 30 6 to 61 meters 101 to 200 f...

Page 6: ...heater while it is plugged in operating or hot Severe burns and electrical shock can occur Item Fuel tank Air output and lint filters Air intake filter Fuel filter Ignitor Fan blades Motor How Often Flush every 150 200 hours of operation or as needed Replace every 500 hours of operation or once a year Wash and dry with soap and water every 500 hours of op eration or as needed Clean twice a heating...

Page 7: ...USE 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 assembly 7 Defective ignitor 8 Defective ignition control assembly 1 Pump pressure incorrect 2 Dirty air intake air output and or lint filter 3 Dirty fuel filter 4 Obstruction in nozzle assembly 5 Photocell assemb...

Page 8: ...er neck 7 Replace side cover FUEL FILTER D30N and D44N 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 D20N 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 D44N 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: ...he ignition control assembly seeFigure30 Repeatthisfor the other four printed circuit board sup ports then remove the assembly CAUTION Ignition control assemblycontainselectrostatic components Handletheassem bly by the edges of the printed circuit board Do not touch any of the quick connect terminals or electronic components Figure 29 Removing Cover Side Cover Figure 30 Removing Circuit Board Side...

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 D20N 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 D30N 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 D30N 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 D44N 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 D44N 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: ...es 2 097198 02 Handles 1 2 M12345 33 Screw 10 24 x 1 3 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 107426 01 Wheel Qty 2 1 1 1 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 1 2 3 5 6 4 7 3 1 8 4 2 5 6 7 D30N and D44N Models D20N Model ...

Page 21: ...0 2850 2850 SPECIFICATIONS Blue Photocell Power Plug 230V 50Hz Ignitor 7 Ignitor Blue Blue Blue Red On Off Switch Green Yellow Motor White White Black Black Brown Brown Photocell 2 Photocell 1 Ignitor Return 8 Motor Return 3 230V Lamp 4 Motor Main 6 AC Neutral N AC Hot 5 Ignition Control Green Yellow 1a 1 2 Purchaseaccessoriesfromyourlocaldealer AIR GAUGE KIT HA1180 For all models Special tool to ...

Page 22: ...0N and D44N It is declared 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 Joseph B Lee Title Vice...

Page 23: ...____________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ ___________________________________________________________________________________________...

Page 24: ...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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