Desa Tech M100VT, M140VT, M200VT, RH140VT, RH200VT Owner's Manual

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PORTABLE FORCED

AIR HEATERS

OWNER’S MANUAL

For more information, visit www.desatech.com

Heater Sizes:

125,000 and 170,000 Btu/Hr Thermostat

100,000 140,000 and 200,000 Btu/Hr Variable Output with Thermostat

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.

TABLE OF CONTENTS

SAFETY INFORMATION ............................................................ 2

PRODUCT IDENTIFICATION ..................................................... 3

UNPACKING............................................................................... 3

FUELS......................................................................................... 3

VENTILATION............................................................................. 3

THEORY OF OPERATION ......................................................... 4

ASSEMBLY................................................................................. 4

OPERATION ............................................................................... 5

OPERATION WITH PORTABLE GENERATOR.......................... 6

STORING, TRANSPORTING, OR SHIPPING............................ 7

PREVENTATIVE MAINTENANCE SCHEDULE ......................... 7

TROUBLESHOOTING ................................................................ 8

SERVICE PROCEDURES .......................................................... 9

SPECIFICATIONS .................................................................... 17

WIRING DIAGRAMS................................................................. 17

ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST ....... 18

WHEELS AND HANDLE PARTS LIST...................................... 24

TECHNICAL SERVICE ............................................................. 25

REPLACEMENT PARTS .......................................................... 25

ACCESSORIES ........................................................................ 25

WARRANTY AND REPAIR SERVICE ........................ Back Cover

Fill In For Your Records Model No. ___________________

(Located on side panel)

Serial No. ___________________

(Located on fuel tank)

Date of Purchase: ______________

Save this manual for future reference.

SAFETY INFORMATION

WARNINGS

IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, operate, or service this heater. Improper use of this heater can cause serious injury or death from burns, ﬁre, explosion, electrical shock, and carbon monoxide poisoning.

DANGER: Carbon monoxide poisoning may lead

to death!

Carbon Monoxide Poisoning: Early signs of carbon monoxide

poisoning resemble the ﬂu, with headaches, dizziness, and/or nausea. If you have these signs, the heater may not be working properly. Get fresh air at once! Have heater serviced. Some people are more affected by carbon monoxide than others. These include pregnant women, persons with heart or lung disease or anemia, those under the inﬂuence of alcohol, and those at high altitudes.

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.

• Use only kerosene, #1/#2 diesel/fuel oil, JET A or JP-8 fuels to avoid risk of ﬁre or explosion. Never use gasoline, naphtha, paint thinners, alcohol, or other highly ﬂammable fuels.

• Fueling a)Personnel involved with fueling shall be qualified and thor-

oughly familiar with the manufacturer's instructions and applicable regulations regarding the safe fueling of heating units.

b)Only the type of fuel specified on the heater's data plate shall

be used.

c) All flame, including the pilot light, if any, shall be extin-

guished and the heater allowed to cool, prior to fueling.

d)During fueling, all fuel lines and fuel-line connections shall

be inspected for leaks. Any leaks shall be repaired prior to returning the heater to service.

e)At no time shall more than one day's supply of heater fuel

be stored inside a building in the vicinity of the heater. Bulk fuel storage shall 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 be in accordance with the authority hav-

ing jurisdiction.

• Use only the electrical voltage and frequency speciﬁed on model plate.

• Heater must be grounded. Use only a properly grounded threewire extension cord. Plug into grounded outlet only.

• Use only in areas free of ﬂammable vapors or high dust content.

• Minimum clearance from any combustible materials: 8 feet (244 cm) from hot air outlet; 6 feet (183 cm) from top; and 2 feet (61 cm) from sides and inlet.

• Locate heater on a stable and level surface while hot or operating or a ﬁre may occur.

• Use only in well-vented areas. Before using heater, provide at least a 2800 square cm (three-square-foot) opening of fresh, outside air for each 30 kw (100,000 Btu/Hr) of rating. This heater produces carbon monoxide, which is listed by the State of California as a reproductive toxin under Proposition 65.

• Keep children and animals away from heater at all times.

• Never start heater when combustion chamber is hot or if fuel has accumulated in combustion chamber.

• When used with thermostat, heater may start at anytime.

• When heater is moved or stored, it must be in a level position or fuel spillage may occur.

• Use heater only in accordance with local ordinances and codes.

• Never use gasoline, crankcase drainings, naphtha, paint thinners, alcohol, or other highly flammable fuels.

• Never use heater where gasoline, paint thinner, or other highly flammable vapors are present.

• Never use heater in living or sleeping areas.

• Never leave a heater plugged in without adult supervision if children or animals are likely to be present.

• Never move, handle, refuel, or service a hot, operating, or plugged-in heater.

• Never attach duct work to front or rear of heater.

• Never attach heater to external fuel tank.

• Heaters used in the vicinity of tarpaulins, canvas, or similar enclosure materials shall be located a safe distance from such materials. The recommended minimum safe distance is

304.8cm (10 feet). It is further recommended that these enclosure materials be of a fire retardant nature. These enclosure materials shall be securely fastened to prevent them from igniting or from upsetting the heater due to wind action.

• Unplug heater when not in use.

• Never block air inlet (rear) or air outlet (front) of heater.

• Warning to New York City Residents For Use Only At Construction Sites in accordance with ap-

plicable NYC codes under NYCFD certificate of approval #4803, #4899, #4908, #4909, or #4934.

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108481

PRODUCT IDENTIFICATION

UNPACKING

FUELS

VENTILATION

PRODUCT IDENTIFICATION

Upper Shell

Hot Air Outlet

Lower Shell

Fuel Cap/ Gauge

Shroud ON/OFF

Switch

Figure 1 - Variable Output With Thermostat Model

Lower Shell

Fuel Cap/ Gauge

Control Cover

Ignition Control Assembly (On Inside of Control Cover)

Upper Shell

Hot Air Outlet

Heat Output Knob

Thermostat Knob

Fuel Tank

Thermostat Knob

Rear Panel

Handle

Extension Cord Wrap

Handle

Fan Guard

UNPACKING

1. Remove all packing items applied to heater for shipment.

2. Remove all items from carton.

3. Check items for any shipping damage. If heater is damaged, promptly inform dealer where you bought heater.

FUELS

WARNING: Use only kerosene, #1/#2 diesel/fuel oil, JET A or JP-8 fuels to avoid risk of ﬁre or explosion. Never use gasoline, oil drained from crankcases, naphtha, paint thinners, alcohol or other highly ﬂammable fuels.

Use only kerosene, #1/#2 diesel/fuel oil, JET A or JP-8 fuels. Heavier fuels such as No. 2 fuel oil or No. 2 diesel fuel may also be used but will result in:

• noticeable odor

• additional fuel ﬁlter maintenance

• the need for nontoxic, anti-icer additives in very cold weather Do not use fuels heavier than No. 2 grade or heavy oils such as oil

drained from crankcases. These heavy oils will not ignite properly and will contaminate the heater.

IMPORTANT:

(yellow) storage container. Be sure storage container is clean. Foreign matter such as rust, dirt, or water will cause the ignition control assembly to shut down heater. Foreign matter may also require heater's fuel system to be frequently cleaned.

Use a KEROSENE ONLY (blue) or DIESEL ONLY

Shroud ON/OFF

Switch

Figure 2 - Thermostat Model

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Control Cover

Ignition Control Assembly (On Inside of Control Cover)

VENTILATION

WARNING: Provide a fresh air opening of at least three square feet (2,800 square cm) for each 100,000

Fuel Tank

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Rear Panel

Extension Cord Wrap

BTU/HR rating. Provide extra fresh air if more heaters are being used. The minimum ventilation requirements must be followed to avoid risks associated with carbon monoxide poisoning. Make certain these requirements are met prior to operating heater.

Example:

A 58.6kw (200,000 Btu/Hr) heater requires one of the

following:

• a two-car garage door [4.88 meter (16 feet) opening] raised

12.7 cm (5 inches)

• a single-car garage door [2.74 meter (9 feet) opening] raised

20.3 cm (8 inches)

• two, 76.2 cm (30 inch) windows raised 38.1 cm (15 inches)

THEORY OF OPERATION

ASSEMBLY

THEORY OF OPERATION

The Fuel System: The air pump forces air through the air line. The

air is then pushed through the nozzle. This air causes fuel to be lifted from the tank. A ﬁne mist of fuel is sprayed into the combustion chamber.

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 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.

Clean Heated Air Out

Combustion Chamber

Ignitor

Motor

Fan

Air Pump

Air Intake Filter

Cool Air In

Air Output Filter

ASSEMBLY

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

Tools Needed

• Medium Phillips Screwdriver

• Pliers

1. Slide axle through shroud. Install washers and wheels on axle as shown in Figure 4.

IMPORTANT:

When installing wheels, point extended hub of

wheels toward shroud (see Figure 4).

2. Place cotter pins in axle. Bend cotter pin legs around axle.

3. Install extension cord wraps into handle.

4. Slide handle onto shroud leaving a one inch gap between parts.

5. Place washers onto screws and insert screws into holes in handles.

6. Visually confirm that all six screws are threaded into nuts in the shroud. Push the handle completely into the shroud.

7. Tighten all scews.

Hot Air Outlet

• Hammer

• Flat Blade Screwdriver

Fuel Tank

Figure 3 - Cross Section Operational View

Nozzle

Air For Fuel System

Fuel Filter

Air For Combustion And Heating

Air Line To Burner

Ignition Control Assembly

Fuel

Shroud

Cotter Pin

Air Inlet

Axle

Extended Hub

Washer

Figure 4 - Wheel and Handle Assembly

Wheel

Handle

Screw

Rear Panel

Washer

Extension Cord Wrap

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108481

OPERATION

OPERATION (Thermostat Models)

IMPORTANT: Review and understand the warnings in the needed to safely operate this heater. Follow all local ordinances and codes when using this heater.

TO START HEATER

1. Follow all ventilation and safety information.

2. Locate heater to provide maximum circulation of the heated

3. Fill fuel tank with fuel. Use only kerosene, #1/#2 diesel/fuel

4. Attach fuel cap/gauge.

5. Plug heater’s power cord into approved, grounded, three-wire

6. Plug extension cord into standard 120 volt/60 hertz, 3-prong

7. Turn thermostat knob to the right (clockwise) to the warmest

8. Push ON/OFF switch to the ON (|) position. Light will come on.

9. After heater is running, adjust thermostat knob to the desired

TO STOP HEATER

Push ON/OFF switch to the OFF (O) position.

TO RESET HEATER

1. Push ON/OFF switch to the OFF (O) position and wait 10 sec-

2. Repeat steps under To Start Heater.

Safety Information

air. Follow all location requirements noted in Safety Information, page 2.

oil, JET A or JP-8 fuels to avoid risk of fire or explosion. Never use gasoline, naphtha, paint thinners, alcohol, or other flammable fuels.

extension cord. Extension cord must be at least six feet (1.8 meters) long.

Extension Cord Size Requirement

6 to 10 feet (1.8 to 3 meters) long, use 18 AWG (0.75 mm2) rated cord

11 to 100 feet (3.3 to 30.5 meters) long, use 16 A WG (1.0 mm2) rated cord

101 to 200 feet (30.8 to 61 meters) long, use 14 AWG (1.5 mm2) rated cord

grounded outlet.

position.

Note:

Ignitor will preheat for five seconds, then heater will start.

setting. This thermostat is a general-heating control. It is not intended for precise temperature control. Adjust thermostat until heater cycles at the desired setting.

onds. (Wait two minutes if heater has been running.)

Note:

A cold heater may affect the thermostat setting.

section, page 2. They are

OPERATION (Variable Output with Thermostat Models)

IMPORTANT: Review and understand the warnings in the needed to safely operate this heater. Follow all local ordinances and codes when using this heater.

TO START HEATER

1. Follow all ventilation and safety information.

2. Locate heater to provide maximum circulation of the heated

3. Fill fuel tank with fuel. Use only kerosene, #1/#2 diesel/fuel

4. Attach fuel cap/guage.

5. Plug heater’s power cord into approved, grounded, three-wire

6. Plug extension cord into standard 120 volt/60 hertz, 3-prong

Manual Mode of Operation

1. Adjust HEAT OUTPUT knob to the desired setting.

2. Push ON/OFF switch to the ON (|) position. Light will come on.

3. Heater will run in the HI heat output setting for 10 to 15 sec-

Note:

and HI while the heater is running.

Note:

MOSTAT knob has no affect on the operation of the heater.

Safety Information

air. Follow all location requirements noted in Safety Information, page 2.

oil, JET A or JP-8 fuels to avoid risk of fire or explosion. Never use gasoline, naphtha, paint thinners, alcohol, or other flammable fuels.

extension cord. Extension cord must be at least six feet (1.8 meters) long.

Extension Cord Size Requirement

6 to 10 feet (1.8 to 3 meters) long, use 18 AWG (0.75 mm2) rated cord

11 to 100 feet (3.3 to 30.5 meters) long, use 16 A WG (1.0 mm2) rated cord

101 to 200 feet (30.8 to 61 meters) long, use 14 AWG (1.5 mm2) rated cord

grounded outlet.

Note:

Ignitor will preheat for five seconds, then heater will start.

onds, then automatically adjust to the desired heat output.

HEAT OUTPUT can be adjusted to any setting between LO

In the manual mode of operation, the setting of the THER-

section, page 2. They are

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OPERATION

OPERATION WITH PORTABLE GENERATOR

OPERATION (Variable Output with Thermostat Models)

Continued

Automatic Mode of Operation

1. Set the HEAT OUTPUT Knob to the AUTO setting.

2. Set the THERMOSTAT Knob to the desired temperature.

3. Push ON/OFF switch to the ON (|) position. Light will come on.

4. If the thermostat is calling for heat (ie. room temperature is lower than the desired temperature setting), ignitor will preheat for five seconds, then heater will start in the HI heat output setting.

Note:

Heater will automatically adjust the heat output to precisely maintain the desired temperature. This results in quieter operation and better fuel economy.

Note:

The heat output setting will be lowered automatically as the room temperature approaches the desired setting.

Note:

The heater will shut off when the room temperature is two degrees higher than the desired temperature setting. The heater will restart when the room temperature is two degrees lower than the desired temperature setting.

COOL DOWN MODE (200VT MODEL ONLY)

When operating in the automatic mode

After the desired temperature is reached, the heater will continue to run without burning fuel for 30 seconds to cool down the components inside the heater. This provides added safety for the operator and extends the life of the components.

Note:

During the 30 second cool down period, the heater will not immediately respond to any changes to the temperature setting. If the setting is increased the heater will start after the cool down period if the desired temperature setting is 2 degrees higher than the room temperature. If the setting is lowered during the cool down period, the heater will remain off until the room temperature drops two degrees below the desired temperature setting.

TO STOP HEATER

Push ON/OFF switch to the OFF (O) position.

TO RESET HEATER

1. Push ON/OFF switch to the OFF (O) position and wait 10 seconds. (Wait two minutes if heater has been running.)

2. Repeat steps under To Start Heater.

OPERATION WITH PORTABLE GENERATOR

WARNING: Before operating heater or any appliance from a portable generator, verify that generator has been properly connected to earth ground. Improper grounding or failure to ground generator can result in electrocution if a ground fault occurs. Refer to owner’s manual supplied by generator manufacturer for proper grounding procedures.

The operating voltage range of the heater is 108 to 132 Volts (120 Volts +/- 10%). Prior to plugging heater into generator the output voltage should be verified (if generator is equipped with the automatic idle feature, the output voltage should be measured with the generator running at full speed). If the voltage does not measure in this range the heater should not be plugged into the generator.

Refer to Operation, page 5, for starting, stopping, and resetting heater procedures.

Alternator

Ground Lug

Copper or Brass Grounding Point

After a safety shutdown

If heater turns off for safety reasons or it runs out of fuel, the heater will continue to run without burning fuel for 30 seconds to cool down the components inside the heater. This safety shutdown can occur while operating in either the Automatic or Manual mode.

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Ground Wire (#10 AWG Stranded-Copper)

Figure 5 - Typical Generator Grounding Method (Generator construction may vary from that shown)

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STORING, TRANSPORTING, OR SHIPPING

Note:

If shipping, transport companies require fuel tanks to be empty.

1. Remove drain plug from bottom side of fuel tank and drain all fuel.

2. Replace drain plug.

3. If any debris is noted in old fuel, add 1 or 2 quarts of clean kerosene to tank, stir, and drain again. This will prevent excess debris from clogging filters during future use.

4. Properly dispose of old and dirty fuel. Check with local automotive service stations that recycle oil.

5. If storing, store heater in dry place. Make sure storage place is free of dust and corrosive fumes.

IMPORTANT:

during next heating season. Using old fuel could damage heater.

Do not store kerosene over summer months for use

STORING, TRANSPORTING, OR SHIPPING

PREVENTATIVE MAINTENANCE SCHEDULE

WARNING: Never service 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 operation or as needed

Clean twice a heating season or as needed

No maintenance required

Clean every season or as needed

Not required/permanently lubricated

How To

See Storing, Transporting, or Shipping, above

See Air Output, Air Intake, and Lint Filters, page 9

See Fuel Filter, pages 10 and 11

See Fan, page 9

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TROUBLESHOOTING

WARNING: Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur.

FAULT CONDITION

Motor does not start five seconds after heater is plugged in

Motor starts and runs but heater does not ignite

POSSIBLE CAUSE

1. No power to heater

2. ON/OFF switch not in the ON (|) position

3. Thermostat setting is too low

WARNING: High voltage!

4. Bad electrical connection between motor and ignition control assembly or ignition control assembly and power cord

5. Binding pump rotor

6. Blown fuse (F1, GMA 10A) on ignition control assembly

7. Defective ignition control assembly

8. Defective motor

1. No fuel in tank

2. Pump pressure incorrect

3. Dirty fuel ﬁlter

4. Obstruction in nozzle

5. Water in fuel tank

WARNING: High voltage!

REMEDY

1. Check circuit breaker in electrical panel

2. Verify the ON/OFF switch is in ON (|) position and light is on

3. Turn thermostat knob to a higher setting

4. Check all electrical connections. See Wir- ing Diagrams, page 17

5. If fan does not turn freely, see Pump Rotor, page 15

6. See Ignition Control Assembly, page 16

7. Replace ignition control assembly

8. Replace motor

1. Fill tank with kerosene

2. See Pump Pressure Adjustment, page 10

3. See Fuel Filter, pages 10 and 11

4. See Nozzle Assembly, pages 13 and 14

5. Drain and ﬂush fuel tank with clean kerosene. See Storing, Transporting, or Ship- ping, page 7

Heater ignites but ignition control assembly shuts heater off after a short period of time

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6. Bad electrical connection between ignitor and ignition control assembly

7. Defective ignitor

8. Blown fuse (F2) on ignition control assembly

9. Defective ignition control assembly

10. 200VT Model Only: Defective fuel valve

1. Pump pressure incorrect

2. Dirty air intake, air output, and/or lint filter

3. Dirty fuel ﬁlter

4. Obstruction in nozzle

5. Photocell assembly not properly installed (not seeing the flame)

6. Dirty photocell lens

WARNING: High voltage!

7. Bad electrical connection between photocell and ignition control assembly

8. Defective photocell

9. Defective ignition control assembly

6. Check electrical connections. See Wiring Diagrams, page 17

7. Replace ignitor, see page 12

8. See Ignition Control Assembly, page 16

9. Replace ignition control assembly

10. See Fuel Valve, page 11

1. See Pump Pressure Adjustment, page 10

2. See Air Output, Air Intake, and Lint Filters, page 9

3. See Fuel Filter, pages 10 and 11

4. See Nozzle Assembly, pages 13 and 14

5. Make sure photocell boot is properly seated in bracket

6. Clean photocell lens

7. Check electrical connections. See Wiring Diagrams, page 17

8. Replace photocell

9. Replace ignition control assembly

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SERVICE PROCEDURES

WARNING: To avoid risk of burn and electrical shock, never attempt to service heater while it is plugged in, operating, or hot.

Setscrew

SERVICE PROCEDURES

Fan

Motor

Setscrew

Fan

UPPER SHELL REMOVAL

1. Remove screws along each side of heater using phillips screwdriver. These screws attach upper and lower shells together. See Figure 6.

2. Lift upper shell off.

3. Remove fan guard.

Screw

Upper Shell

Figure 6 - Upper Shell Removal (Variable Output Model Shown)

FAN

IMPORTANT:

motor from heater. The weight of the motor resting on the fan could damage the fan pitch (see Figure 7).

1. Remove upper shell (see Figure 6).

2. Use 1/8" allen wrench to loosen setscrew which holds fan to motor shaft.

3. Slip fan off motor shaft.

4. Clean fan using a soft cloth moistened with kerosene or solvent.

5. Dry fan thoroughly.

6. Replace fan on motor shaft. Place fan hub flush with end of motor shaft (see Figure 8).

7. Place setscrew on flat of shaft. Tighten setscrew firmly (40-50 inch-pounds/4.5-5.6 n-m).

8. Replace upper shell.

Remove fan from motor shaft before removing

Flush

Motor Shaft

Figure 7 - Fan, Motor Shaft, and Setscrew Location

Figure 8 - Fan Cross Section

Motor Shaft

AIR OUTPUT, AIR INTAKE AND LINT FILTERS

1. Remove upper shell (see Figure 6).

2. Remove filter end cover screws using 5/16" nut-driver (see Figure 9).

3. Remove filter end cover.

4. Replace air output and lint filters.

5. W ash or replace air intake filter (see Pre ventative Maintenance Schedule, page 7).

6. Replace filter end cover.

7. Replace upper shell.

IMPORTANT:

Figure 9 - Air Output, Air Intake, and Lint Filters

Do not oil filters.

Air Intake Filter

Filter End Cover

Lint Filter

Air Output Filter

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SERVICE PROCEDURES

Continued

PUMP PRESSURE ADJUSTMENT

1. Remove fan guard.

2. Remove pressure gauge plug from filter end cover (see Figure 10).

3. Install accessory pressure gauge (part number HA1180).

4. Start heater (see Operation, page 5). Allow motor to reach full speed.

5. For variable output (VT) models, set heat output knob to HI (see Figure 1, page 3).

6. Adjust pressure. Turn relief valve to right to increase pressure. Turn relief valve to left to decrease pressure. See specifications below for correct pressure (see Figure 11).

7. Remove pressure gauge. Replace pressure gauge plug in filter end cover.

Relief Valve

Pressure Gauge Plug

FUEL FILTER

1. Remove control cover screws using 5/16" nut-driver.

2. Remove control cover.

3. Pull upper fuel line off fuel filter neck (see Figure 12).

4. Carefully pry bushing, fuel filter, and lower fuel line out of fuel tank (see Figure 12).

5. Wash fuel filter with clean fuel and replace in tank.

6. Attach upper fuel line to fuel filter neck.

7. Replace control cover.

Screw

Control Cover

Fuel Filter, Bushing, and Lower Fuel Line

Upper Fuel Line

Figure 10 - Pressure Gauge Plug Removal

Pressure Gauge

Pump

Model Pressure

100VT 6.5 PSI

125T 6.0 PSI

140VT 6.5 PSI

170T 6.0 PSI

200VT 6.5 PSI

Figure 11 - Adjusting Pump Pressure

Figure 12 - Fuel Filter Removal

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108481

SERVICE PROCEDURES

Continued

SERVICE PROCEDURES

(For 200VT Model Only)

1. Remove control cover screws using phillips screwdriver.

2. Remove control cover (see Figure 13).

3. Pull lower fuel line off the fuel valve fitting (see Figure 13).

4. Carefully pry bushing, lower fuel line, and fuel filter out of fuel tank.

5. Wash fuel ﬁlter with clean fuel and replace in tank.

6. Attach lower fuel line to fuel valve fitting.

7. Replace control cover.

Screw

Control Cover

Fuel Filter, Bushing, and Lower Fuel Line

Fuel Valve Fitting

FUEL VALVE

(For 200VT Model Only)

1. Remove control cover (see Figure 13) and upper shell (see Figure 6, page 9) screws using phillips screwdriver.

2. Remove fan (see Fan, page 9).

3. Pull lower fuel line off the fuel valve fitting (see Figure 14).

WARNING: High Voltage

4. Disconnect red and white wires from fuel valve (see Figure 14).

5. Using 1/4" nut driver remove 2 screws holding fuel valve and bracket to lower shell (see Figure 14). Save these screws.

6. Using 1/4" nut driver remove 2 screws holding fuel valve to bracket. Save these screws.

7. Attach new fuel valve to bracket with 2 screws.

8. Install new fuel valve and bracket on lower shell with 2 screws.

9. Connect red and white wires (polarity not important). Connect upper and lower fuel lines to fuel valve (see Figure 14).

10. Replace fan, upper shell, and control cover.

Valve Fittings

Fuel Valve

Electrical Wires

Screw

Figure 13 - Fuel Filter Removal, 200VT Model Only

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108481

Bracket

Lower Fuel Line

Figure 14 - Fuel Valve Replacement, 200VT Model Only

SERVICE PROCEDURES

Continued

IGNITOR

1. Remove upper shell (See Upper Shell Removal, page 9).

2. Remove fan (see page 9).

3. Remove 2 control cover screws with a phillips screwdriver. Remove control cover (see Figure 12, page 10 or Figure 13, page 11, according to model).

4. Disconnect ignitor wires from ignition control assembly (see Figure 15). Pull the ignitor wires up through the hole in the lower shell.

5. Disconnect fuel line hose and air line hose. Remove photocell from photocell bracket (see Figure 15).

6. Remove combustion chamber. Stand combustion chamber on end with nozzle adapter bracket on top (see Figure 16).

7. Remove ignitor screw with a 1/4" nut driver. Carefully remove ignitor from nozzle adapter bracket.

CAUTION: Do not bend or strike ignitor element.

Handle with care.

Combustion Chamber

Nozzle Adapter Bracket

8. Carefully remove replacement ignitor from styrofoam packing.

9. Carefully guide ignitor into opening in nozzle adapter bracket. Do not strike ignitor element. Attach ignitor to nozzle adapter bracket with screw using a 1/4" nut driver (see Figure 16). Torque .90 to 1.69 N-m (8 to 15 in-lbs) Do not over torque.

10. Replace combustion chamber.

11. Route the ignitor wires back down through the hole in the lower shell. Connect wires to the ignition control assembly (see Figure 15).

12. Replace control cover (see Figure 12, page 10 or Figure 13, page 11, according to model).

13. Connect and route fuel line hose and air line hose to nozzle adapter assembly. See Fuel and Air Line Replacement and Proper Routing, page 14.

14. Replace photocell in photocell bracket. Route wires as shown in either Figure 17, page 13, or Figure 20, page 14, according to model.

15. Replace fan (see page 9).

16. Replace upper shell (see page 9).

Ignitor Screw/ Washer Assembly

Ignitor

Air Line Hose

Fuel Line Hose

Photocell Bracket

Photocell Assembly

Control Cover

Figure 15 - Disconnecting Ignitor Wires from Ignition Control Assembly

Ignitor Wire

Ignition Control Assembly

Ignitor Element

Photocell Bracket

Combustion Chamber

Figure 16 - Ignitor Replacement

Ignitor

Nozzle Adapter Bracket

Nozzle Adapter Bracket Opening

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108481

SERVICE PROCEDURES

Continued

NOZZLE ASSEMBLY

(For 125T/170T/100VT/140VT Models Only)

1. Remove upper shell (see Upper Shell Removal, page 9).

2. Remove fan (see Fan, page 9).

3. Remove fuel and air line hoses from nozzle assembly (see Figure 17).

4. Turn nozzle assembly 1/4 turn to left and pull toward motor to remove (see Figure 18).

5. Place plastic hex-body into vise and lightly tighten.

6. Carefully remove nozzle from the nozzle adapter using 5/8" socket wrench (see Figure 19).

7. Blow compressed air through face of nozzle. This will free any dirt in nozzle area.

8. Inspect nozzle sleeve for damage.

9. Replace nozzle into nozzle adapter until nozzle seats. Tighten 1/3 turn more using 5/8" socket wrench 4.5 to 5.1 N-m (40 to 45 in-lbs). See Figure 19.

10. Attach nozzle assembly to burner strap (see Figure 18).

11. Attach fuel and airline hoses to nozzle assembly. See Fuel and Airline Replacement and Proper Routing, page 14.

12. Replace fan (see Fan, page 9).

13. Replace upper shell (see Upper Shell Removal, page 9).

SERVICE PROCEDURES

Combustion Chamber

Figure 18 - Removing Nozzle/Adapter Assembly

Nozzle Face

Nozzle

Nozzle Adapter

Figure 19 - Nozzle and Nozzle Adapter

Nozzle Sleeve

Air Line Fitting

Nozzle/Adapter Assembly

Fuel Line Fitting

Combustion Chamber

Nozzle Adapter Bracket

Photocell Bracket

Air Line Hose

Figure 17 - Removing Air and Fuel Line Hoses (125T/170T/100VT/140VT Models Only)

For more information, visit www.desatech.com

108481

Nozzle/ Adapter Assembly

Fuel Line Hose

SERVICE PROCEDURES

Continued

(For 200VT Model Only)

1. Remove combustion chamber and ignitor by following steps 1 through 7 under Ignitor, page 12.

2. Carefully place the ignitor in a safe location.

3. Remove two nozzle adapter bracket screws (see Figure 20).

4. Place hex-shaped aluminum nozzle adapter into vise (do not overtighten).

5. Carefully remove nozzle from nozzle adapter using 5/8" socket wrench (see Figure 21).

6. Blow compressed air through face of nozzle. This will remove any debris in nozzle.

7. Inspect nozzle seal for damage.

8. Replace nozzle into nozzle adapter until nozzle seats. Tighten 80-110 inch-pounds.

9. Attach nozzle adapter bracket to combustion chamber with two screws removed in step 3.

10. Repeat steps 9 through 16 under Ignitor, page 12.

Combustion Chamber

Nozzle Adapter Bracket

Photocell Bracket

Air Line Hose

Nozzle/ Adapter Assembly

Fuel Line Hose

FUEL AND AIR LINE REPLACEMENT AND PROPER ROUTING

1. Remove upper shell (see Upper Shell Removal, page 9).

2. Remove control cover screws using phillips screwdriver (see Figure 12, page 9).

3. Remove control cover.

4. Inspect fuel and air line hoses for cracks and/or holes. If fuel line hose is damaged, disconnect from nozzle adapter (see Figure 17, page 13, or Figure 20, according to model) and from fuel filter (see Fuel Filter, pages 10 and 11). If air line hose is damaged, disconnect from nozzle adapter (see Figure 17, page 12, or Figure 20, according to model) and from barb fitting on pump end cover (see Figure 22).

5. Install new air and/or fuel line. Attach one end of air line hose to barb fitting on pump end cover (see Figure 28) and the other end to nozzle adapter (see Figure 17, page 13, or Figure 20, according to model). Attach one end of fuel line hose to fuel filter (see Fuel Filter, pages 10 and 11) and the other end to nozzle adapter (see Figure 17, page 13, or Figure 20, according to model).

Note:

Route hoses as shown in see Figure 17, page 12, or Figure 20, according to model. Hoses are not to touch photocell bracket.

6. Replace control cover.

7. Replace upper shell (see Upper Shell Removal, page 9).

Pump End Cover

Barb Fitting

Figure 20 - Removing Air and Fuel Line Hoses (200VT Model Only)

Nozzle Face

Nozzle

Nozzle Adapter Bracket

Figure 21 - Nozzle and Nozzle Adapter

Nozzle Sleeve

Nozzle Adapter

Air Line Fitting

Fuel Line Fitting

For more information, visit www.desatech.com

Air Hose

Figure 22 - Air Hose to Barb Fitting

108481

SERVICE PROCEDURES

Continued

SERVICE PROCEDURES

PUMP ROTOR

(Procedure if Rotor is Binding)

1. Remove upper shell (see Upper Shell Removal, page 9).

2. Remove fan guard.

3. Remove filter end cover screws using 5/16" nut driver (see Figure 23).

4. Remove ﬁlter end cover and air ﬁlters.

5. Remove pump plate screws using 5/16" nut-driver.

6. Remove pump plate.

7. Remove rotor, insert, and blades (see Figure 23).

8. Check for debris in pump. If debris is found, blow out with compressed air.

9. Install insert and rotor.

10. Check gap on rotor. Adjust to .076/.101 mm (.003"/.004") if needed (see Figure 24).

Note:

Rotate rotor one full turn to ensure the gap is .076/.101 mm

(.003"/.004") at tightest position. Adjust if needed.

11. Install blades, pump plate, air ﬁlters, and ﬁlter end cover.

12. Replace fan guard and upper shell (see Upper Shell Removal, page 9).

13. Adjust pump pressure (see Pump Pressure Adjustment, page 10).

Note:

If rotor is still binding, proceed as follows.

14. Perform steps 1 through 6.

15. Place ﬁne grade sandpaper (600 grit) on ﬂat surface. Sand rotor lightly in “ﬁgure 8” motion four times (see Figure 25).

16. Reinstall insert and rotor.

17. Perform steps 10 through 12.

Blade

Pump Plate

Rotor

Insert

Air Output Filter

Figure 23 - Rotor Location

Gap Adjusting Screw

.003"/.004" (.076-.101 mm) Gap Measured

Blade

Gap Adjusting Screw

Figure 24 - Gap Adjusting Screw Locations

Sandpaper

With Feeler Gauge

Rotor

Air Intake Filter

Filter End Cover

108481

Figure 25 - Sanding Rotor

For more information, visit www.desatech.com

SERVICE PROCEDURES

Continued

IGNITION CONTROL ASSEMBLY (Thermostat Models)

WARNING: High voltage!

1. Unplug heater.

2. Remove control cover screws (2) using phillips screwdriver to expose ignition control assembly.

3. Remove fuse cover.

4. Remove fuse from fuse clips.

5. Replace with new fuse (DESA part number 105880-02). Do not substitute a fuse with a higher current rating. Use Bussmann GMA-10 or equivalent.

6. Replace fuse cover.

7. Replace control cover (see Figure 12, page 10).

Fuse

Fuse Clips

Cover

Fuse

IGNITION CONTROL ASSEMBLY (Variable Output with Thermostat Models)

WARNING: High voltage!

1. Unplug heater.

2. Remove control cover screws (2) using phillips screwdriver to expose ignition control assembly.

Replacing Fuse F1

1. Remove fuse from fuse clips.

2. Replace with new fuse (DESA part number 105880-01). Do not substitute a fuse with a higher current rating. Use Bussmann GMA-10 or equivalent.

3. Replace control cover (see Figure 13, page 11).

Replacing Fuse F2

1. Remove fuse from socket.

2. Replace with new fuse (DESA part number 109115-01). Do not substitute a fuse with a higher current rating. Use Wickmann 3821100041 or equivalent.

3. Replace control cover (see Figure 12, page 9).

Fuse Clips

Fuse (F1)

Figure 26 - Replacing Fuse

Fuse (F2)

Fuse Socket

Figure 27 - Replacing Fuses F1 and F2

For more information, visit www.desatech.com

108481

SPECIFICATIONS

WIRING DIAGRAMS

SPECIFICATIONS

Model Size 125T 170T 100VT 140VT 200VT

Output Rating (Btu/Hr) 125,000 170,000 65,000-100,000 100,000-140,000 140,000-200,000 Fuel Use only kerosene, #1/#2 diesel/fuel oil, JET A or JP-8 fuels* Fuel Tank Capacity

(U.S. Gal./Liters) 13.5/51 13.5/51 13.5/51 13.5/51 13.5/51

Fuel Consumption

(Gal. Per Hr/Liters Per Hr) .90/3.41 1.25/4.73 .50-.75/1.89-2.84 .75-1.05/2.84-3.97 1.05-1.40/3.97-5.30

Pump Pressure (psi) 6.0 6.0 6.5 6.5 6.5 Electric Requirements 120 V/60 HZ (Same All Models)

Amperage (Normal Run) 3.6 3.6 3.6 3.6 4.0 Maximum Motor Speed (RPM) 3400 3400 3400 3400 3400 Hot Air Output (CFM) 520 580 400/480 480/540 500/600 Motor Horsepower 1/5 1/5 1/5 1/5 1/4 Shipping Weight 85/38.5 85/38.5 85/38.5 85/38.5 87/39.4

(Approximate Pounds/Kilograms) Heater Weight without Fuel 73/33.1 73/33.1 73/33.1 73/33.1 75/34

(Approximate Pounds/Kilograms) * Use of #2 diesel/fuel oil will result in noticeable odor and could require additional fuel filter maintenance. Use in extreme cold

temperatures may require nontoxic anti-icer additives.

WIRING DIAGRAMS

Blue Blue

Red

White

Green

Tan

Photocell

Motor

Ignitor

White

Green

Tan

Black

Power Plug 120V/60Hz

Black

ON/OFF Switch

with Light

Ignition Control Assembly

Photocell

Ignitor

Motor Return

AC Neutral (L2)

120V (L1)

Motor

Ignitor

Figure 28 - Wiring Diagram (100VT and 140VT Models)

Photocell

Ignitor

Motor Return

AC Neutral (L2)

120V (L1)

Ignition Control Assembly

Motor

Ignitor

Blue Blue

White

Green

Red

Black

Y ellow

Photocell

Motor

Ignitor

White

Green

Black

Yellow

Black Thermostat

Power Plug 120V/60Hz

ON/OFF Switch

with Light

Figure 29 - Wiring Diagram (125T and 170T Models)

Photocell

Ignitor

Motor Return

AC Neutral (L2)

Ignition Control Assembly

120V (L1)

Motor

Ignitor

Valve

Valve Return

Figure 30 - Wiring Diagram (200VT Model)

Blue Blue

White

Green

Red

Tan

Purple

Photocell

Motor

Ignitor

White

Green

Tan

Black

Power Plug 120V/60Hz

Black

ON/OFF Switch

with Light

Solenoid

Valve

Purple

108481

For more information, visit www.desatech.com

ILLUSTRATED PARTS BREAKDOWN

125T and 170T Models

ILLUSTRATED PARTS BREAKDOWN

125T and 170T MODELS

7-4

7-1

7-2

7-6

7-3

7-5

23 19

10-1

10-2

10-3

10-17

10-16

10-15

10-13

Motor and Pump Assembly

For more information, visit www.desatech.com

10-4

10-14

10-5

10-13

10-6

10-12

10-7

10-8

10-9

10-10

10-11

108481

PARTS LIST

125T and 170T MODELS

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.

PARTS LIST

125T and 170T Models

KEY PART NO. NUMBER DESCRIPTION QTY.

1 107353-01 Upper Shell (Service Part Will

Be Black) 1 2 108631-01 Screw, #10-16 x 1" 14 3 098512-65 Combustion Chamber (125T) 1

098512-73 Combustion Chamber (170T) 1 4 103154-05 Photocell Bracket 1 5 M10908-2 Screw, #6-32 x 3/8" 2 6 M16656-21 Photocell Assembly 1 7 7-1 HA3027 Nozzle Assembly (125T) 1

7-2 102548-07 Ignitor Kit 1 7-3 M10908-75 Screw 1 7-4 102336-01 Nozzle Adapter Bracket 1 7-5 104054-01 Nozzle Adapter 1 7-6 103347-01 Washer 1 8 107992-01 Screw, #10-16 x 3/8" 2 9 097293-01 Fan (125T)

10 10-1 102001-31 Motor 1 10-2 079975-02 Pump Body 1 10-3 FHPF3-5C Screw, #10-32 x 5/8" 2 10-4 M22009** Rotor Insert 1 10-5 M22456-1** Pump Rotor 1 10-6 M50545 Pump End Cover 1 10-7 M12179*** Intake Filter 1 10-8 M16545 Filter End Cover 1 10-9 M8940 10-10 M10993-1 10-11 M27694 10-12 M22997 10-13 M12461-31 Screw, #10-32 x 1" 10 10-14 M12244-1*** Output Filter 1 10-15 M11637*** Lint Filter 1 10-16 104096-01 Fitting, Straight Nylon Barb 1 10-17 M8643** Blade 4 11 M50631 Rubber Bumper 2

∆ Burner Head Assembly 1

HA3029 Nozzle Assembly (170T) 1

102042-01 Fan (170T) 1

∆ Motor and Pump Assembly 1

∞ Steel Ball, 1/4" Diameter 1

∞ Relief Spring 1 ∞ Adjusting Screw 1 ∞ Plug 1

KEY PART NO. NUMBER DESCRIPTION QTY.

12 101206-01 Motor Mounting Bracket 1 13 M10908-1 Screw, #6-32 x 1/4" 2 14 104068-02 Ignition Control Assembly 1 15 NTC-4C Hex Lock Nut, 1/4-20 2 16 108460-01 Fan Guard 1 17 M27417 Drain Plug (Includes “o” Ring) 1 18 108457-01 Shroud 1 19 M51345-09 Fuel Line 1 20 106896-01*** Fuel Filter 1 21 M51151-02 Fuel Line Tube 1 22 M10990-3 Rubber Bushing 1 23 M50814-03 Airline 1 24 107353-05 Lower Shell (Service Part Will

Be Black) 1 25 M50104-06 Bushing 1 26 M50104-01 Bushing 1 27 M12461-51 Screw, #10-16 x 0.38" 1 28 108708-01 Clip Nut 13 29 M10908-14 Screw, #8-32 x 3/8" 1 30 108088-12 Fuel Tank 1 31 097663-03 Fuel Cap/Gauge 1 32 108668-01 P.C. Board Support 5 33 108394-01 ON/OFF Switch 1 34 107994-01 Power Cord 1 35 108461-01 Control Cover 1 36 M9900-170 Wire Assembly, Black 1 37 109541-01 Knob 1 38 097657-03 Thermostat 1 39 108458-01 Rear Panel 1 40 109544-01 Rubber Washer 1 41 097785-08 Foam Gasket 1 42 108739-01 Filler Neck Screen 1 43 097467-02 Button Plug 1 44 M9900-197 Wire Assembly, Green 1

103814-01 Wire Tie (Not Shown) - Groups 1

wires connected to Ignition

Control Assembly

105880-02 Fuse (Not Shown) 1

∆ Not available as an assembly ∗∗∗ Included in Filter Kit (Part No. HA3017) ** Included in Rotor Kit (Part No. HA3004) ∞ Included in Pump Adjustment Kit (Part No. HA3020)

For more information, visit www.desatech.com

108481

ILLUSTRATED PARTS BREAKDOWN

100VT and 140VT Models

ILLUSTRATED PARTS BREAKDOWN

100VT and 140VT MODELS

23 19

7-4

7-1

7-2

7-6

7-3

7-5

10-15

10-14

10-1

10-13

10-2

10-3

10-11

10-4

10-12

10-5

10-6

10-7

10-8

10-9

Motor and Pump Assembly

For more information, visit www.desatech.com

10-11

10-10

108481

PARTS LIST

100VT and 140VT MODELS

PARTS LIST

100VT and 140VT Models

KEY PART NO. NUMBER DESCRIPTION QTY.

1 107353-01 Upper Shell (Service Part Will

Be Black) 1 2 108631-01 Screw, #10-16 x 1" 14 3 098512-70 Combustion Chamber (100VT) 1

098512-71 Combustion Chamber (140VT) 1 4 103154-05 Photocell Bracket 1 5 M10908-2 Screw, #6-32 x 3/8" 2 6 M16656-21 Photocell Assembly 1 7 7-1 100735-32 Nozzle Assembly (100VT) 1

10 10-1 102001-31 Motor (100VT) 1

10-2 079975-02 Pump Body 1 10-3 FHPF3-5C Screw, #10-32 x 5/8" 2 10-4 M22009** Rotor Insert 1 10-5 M22456-1** Pump Rotor 1 10-6 M50545 Pump End Cover 1 10-7 M12179*** Intake Filter 1 10-8 M16545 Filter End Cover 1 10-9 106939-01 Assembly, Screw and Stem 1 10-10 M22997 10-11 M12461-31 Screw, #10-32 x 1" 10 10-12 M12244-1*** Output Filter 1 10-13 M11637*** Lint Filter 1 10-14 104096-01 Fitting, Straight Nylon Barb 1 10-15 M8643** Blade 4 11 M50631 Rubber Bumper 2 12 101206-01 Motor Mounting Bracket 1

∆ Burner Head Assembly 1

100735-24 Nozzle Assembly (140VT) 1

102042-01 Fan (140VT) 1

∆ Motor and Pump Assembly 1

102001-32 Motor (140VT)

∞ Plug 1

KEY PART NO. NUMBER DESCRIPTION QTY.

13 108669-01 Reducing Tee Fitting 1 14 104068-06 Ignition Control Assembly 1 15 NTC-4C Hex Lock Nut, 1/4-20 2 16 108460-01 Fan Guard 1 17 M27417 Drain Plug (Includes “o” Ring) 1 18 108457-01 Shroud 1 19 M51345-09 Fuel Line 1 20 106896-01*** Fuel Filter 1 21 M51151-02 Fuel Line Tube 1 22 M10990-3 Rubber Bushing 1 23 M50814-03 Airline 1 24 107353-05 Lower Shell (Service Part Will

Be Black) 1 25 M50104-06 Bushing 1 26 M50104-01 Bushing 1 27 M12461-51 Screw, #10-16 x 0.38" 1 28 108708-01 Clip Nut 13 29 M10908-14 Screw, #8-32 x 3/8" 1 30 108088-12 Fuel Tank 1 31 097663-03 Fuel Cap/Gauge 1 32 108668-01 P.C. Board Support 3 33 108394-01 ON/OFF Switch 1 34 107994-01 Power Cord 1 35 108461-01 Control Cover 1 36 M9900-170 Wire Assembly, Black 1 37 108480-01 Knob 2 38 109118-01 Silicone Tubing 1 39 108458-01 Rear Panel 1 40 097785-08 Foam Gasket 1 41 108739-01 Filler Neck Screen 1 42 097467-02 Button Plug 1 43 109510-01 Nut and Lockwasher (2 Each) 1 44 M9900-197 Wire Assembly, Green 1

103814-01 Wire Tie (Not Shown) - 1

Bundled Wires Connected to

Control Assembly

105880-02 Fuse F1 (Not Shown) 1 109115-01 Fuse F2 (Not Shown) 1

∆ Not available as an assembly ∗∗∗ Included in Filter Kit (Part No. HA3017) ** Included in Rotor Kit (Part No. HA3004) ∞ Included in Pump Adjustment Kit (Part No. HA3020)

For more information, visit www.desatech.com

108481

ILLUSTRATED PARTS BREAKDOWN

200VT Model

ILLUSTRATED PARTS BREAKDOWN

200VT MODEL

7-1

7-2

7-3

7-4

7-5

7-6

7-11

Nozzle Assembly

7-7

7-8

7-10

7-9

23 19

10-1

10-2

10-16

10-15

10-14

Motor and Pump Assembly

10-3

10-4

10-5

10-6

10-7

10-8

39-6

10-9

10-13

10-12

10-11

10-10

For more information, visit www.desatech.com

Fuel Valve Assembly

39-1

39-4

39-2

39-4

39-5

39-3

108481

PARTS LIST

200VT Model

PARTS LIST

200VT MODEL

KEY PART NO. NUMBER DESCRIPTION QTY.

1 107353-01 Upper Shell (Service Part

Will Be Black) 1 2 108631-01 Screw, #10-16 x 1" 14 3 098512-72 Combustion Chamber 1 4 103154-05 Photocell Bracket 1 5 M10908-2 Screw, #6-32 x 3/8" 2 6 M16656-21 Photocell Assembly 1 7 7-1 100735-13 Nozzle Assembly 1 7-2 M10659-1 Nozzle Washer 2 7-3 M10809-1 Nozzle Spring 1 7-4 M8882 Nozzle Sleeve 1 7-5 107272-01 Retaining Ring 1 7-6 102336-03 Nozzle Adapter Bracket 1 7-7 102548-07 Ignitor Kit 1 7-8 103347-01 Belleville Washer 1 7-9 M10908-75 Screw, #6-32 x .88 1 7-10 107273-01 Nozzle Adapter 1 7-11 M50820-02 Barb Fitting 1 8 107992-01 Screw, #10-16 x 3/8" 2 9 102042-01 Fan 1 10 10-1 102001-32 Motor 1 10-2 079975-03 Pump Body 1 10-3 FHPF3-6C Screw, #10-32 x 5/8" 2 10-4 M22009** Rotor Insert 1 10-5 M22456-2** Pump Rotor 1 10-6 M50545 Pump End Cover 1 10-7 M12179*** Intake Filter 1 10-8 M16545 Filter End Cover 1 10-9 106939-01 Assembly, Screw and Stem 1 10-10 M22997 10-11 M12461-31 Screw, #10-32 x 1" 4 10-12 M12244-1*** Output Filter 1 10-13 M12461-32 Screw, #10-32 x 1.12" 6 10-14 M11637*** Lint Filter 1 10-15 M50820-02 Barb Fitting 1 10-16 M8643-2** Blade 4 11 M50631 Rubber Bumper 2 12 101206-01 Motor Mounting Bracket 1 13 097785-04 Foam Gasket 2 14 104068-07 Ignition Control Assembly 1 15 NTC-4C Hex Lock Nut, 1/4-20 2 16 108460-01 Fan Guard 1

∆ Burner Head Assembly 1

∆ Motor and Pump Assembly 1

∞ Plug 1

KEY PART NO. NUMBER DESCRIPTION QTY.

17 M27417 Drain Plug (Includes “o” Ring) 1 18 097467-02 Button Plug 1 19 M51345-03 Fuel Line 1 20 M51150-01*** Fuel Filter 1 21 M51345-04 Fuel Line Tube 1 22 M10990-3 Rubber Bushing 1 23 M50814-03 Airline 1 24 107353-05 Lower Shell (Service Part

Will Be Black) 1 25 M50104-06 Bushing 1 26 M50104-01 Bushing 1 27 M12461-51 Screw, #10-16 x 0.38" 1 28 108708-01 Clip Nut 13 29 M10908-14 Screw, #8-32 x 3/8" 1 30 108088-12 Fuel Tank 1 31 097663-03 Fuel Cap/Gauge 1 32 108668-01 P.C. Board Support 3 33 108394-01 On/Off Switch 1 34 107994-01 Power Cord 1 35 108461-01 Control Cover 1 36 M9900-170 Wire Assembly, Black 1 37 108669-01 Reducing Tee Fitting 1 38 108458-01 Rear Panel 1 39

39-1 107643-01 Fuel Valve 1 39-2 107336-01 Fuel Valve Bracket 1 39-3 M12461-13 Hex Head Screw, #8-32 x 1/4" 2 39-4 M50820-02 Fitting Barb 2 39-5 102432-01 Screw Hex Hd Sems Ext "B"

39-6 097951-15 Wire Assembly, Purple 2 40 108480-01 Knob 2 41 097785-08 Foam Gasket 1 42 109118-01 Silicone Tubing 1 43 108457-01 Shroud 1 44 108739-01 Filler Neck Screen 1 45 109510-01 Nuts and Lockwashers (2 Each) 1 46 M9900-197 Wire Assembly, Green 1

∆ Fuel Valve Assembly 1

#10-16 x 1/2" 2

103814-01 Wire Tie (Not Shown) 1

(Bundled Wires Connected

to Control Assembly)

105880-02 Fuse F1 (Not Shown) 1 109115-01 Fuse F2 (Not Shown) 1

∆ Not available as an assembly ∗∗∗ Included in Filter Kit (Part No. HA3017) ** Included in Rotor Kit (Part No. HA3005) ∞ Included in Pump Adjustment Kit (Part No. HA3020)

For more information, visit www.desatech.com

108481

WHEELS AND HANDLE

WHEELS AND HANDLE PARTS LIST

KEY PART PART NO. NUMBER DESCRIPTION QTY.

1 108459-01 Handle/Support 1 2 WP 4C Washer 6 3 108630-01 Screw 6 4 108463-01 Extension Cord Wrap 2 5 108466-01 Axle 1 6 108468-01 Washer 4 7 107426-01 Wheel Kit 2 8 C3-8C Cotter Pin 2

For more information, visit www.desatech.com

108481

TECHNICAL SERVICE

REPLACEMENT PARTS

ACCESSORIES

TECHNICAL SERVICE

You may have further questions about installation, operation, or troubleshooting.

If so, contact DESA International’s Technical Service Department at 1-866-672-6040.

You can also visit DESA International’s technical services web site at www.desatech.com.

REPLACEMENT PARTS

Note:

Use only original replacement parts. This will protect your

warranty coverage for parts replaced under warranty.

PARTS UNDER WARRANTY

Contact authorized dealers of this product. If they can’t supply original replacement part(s), call DESA International’s Technical Service Dept. at 1-866-672-6040.

When calling DESA International, have ready:

• your name

• your address

• model and serial numbers of your heater

• how heater was malfunctioning

• purchase date Usually, we will ask you to return the part to the factory.

PARTS NOT UNDER WARRANTY

Contact authorized dealers of this product. If they can’t supply original replacement part(s), call DESA International at 1-866-672-6040 for referral information. Parts dealers are listed in the Authorized Service Center booklet supplied with heater.

When calling DESA International, have ready:

• model and serial numbers of your heater

• the replacement part number

ACCESSORIES

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 dealer or DESA International at 1-866-672-6040 for referral information. Parts Centrals are listed in the Authorized Service Center booklet supplied with heater.

AIR GAUGE KIT - HA1180

For all models. Special tool to check pump pressure.

A 008

IGNITION CONTROL ASSEMBLY/PHOTOCELL TESTER - HA1170

Special tool used to test the ignition control assembly and photocell.

108481

For more information, visit www.desatech.com

WARRANTY AND REPAIR SERVICE

LIMITED WARRANTY

DESA International warrants this product and any parts thereof, to be free from defects in materials and workmanship for two (2) years 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 condition. Transportation and incidental costs associated with warranty repairs are not reimbursable under this warranty.

Warranty service is available only through authorized dealers and service centers. This warranty does not cover defects resulting from misuse, abuse, negligence, accidents, lack of proper maintenance, normal wear, alteration,

modiﬁcation, tampering, contaminated fuels, repair using improper parts, or repair by anyone other than an authorized dealer or service center. Routine maintenance is the responsibility of the owner.

THIS EXPRESS WARRANTY IS GIVEN IN LIEU OF ANY OTHER WARRANTY EITHER EXPRESSED OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

DESA International assumes no responsibility for indirect, incidental or consequential damages. Some states do not allow the exclusion or limitation of incidental or consequential damages or limitations or exclusions may not apply to you. This Limited Warranty gives you speciﬁc legal rights and you may also have other rights which vary from state to state.

WARRANTY 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.

REPAIR SERVICE

Return the heater to your nearest authorized service center. Each Service Center is independently owned and operated. Repairs not covered by the warranty will be billed at standard prices. We reserve the right to amend these specifications at any time without notice.

Illustrated parts lists can be obtained free of charge. Send a self addressed stamped envelope to the address listed below. List the heater model number and the date located in the lower right corner of this page. A service manual may be purchased from the address listed below. Send a check for $5.00 payable to DESA International.

When writing for information regarding your heater, be sure to include the model number and serial number as shown on the model plate. For more information about this warranty, write:

2701 Industrial Drive P.O. Box 90004 Bowling Green, KY 42102-9004

www.desatech.com

Printed in U.S.A.

108481 01

NOT A UPC

For more information, visit www.desatech.com

108481-01 Rev. C 11/01

108481

Desa Tech M100VT, M140VT, M200VT, RH140VT, RH200VT Owner's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual