Desa Tech M125T, M170T, M200T, RE125T, RE170T Owner's Manual

Name: Desa Tech M125T
Brand: Desa Tech
SKU: 1982061
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PORTABLE FORCED AIR HEATERS

OWNER’S MANUAL

Heater Sizes:

125,000 170,000 and 200,000 Btu/Hr

Kerosene/Diesel Heater with Built-in Thermostat

CALENTADORES PORTÁTILES DE

AIRE FORZADO

MANUAL DEL PROPIETARIO

Tamaños de los calentadores:

125.000 170.000 y 200.000 BTU/h

Calentador de keroseno/diesel con termostato integrado

APPAREILS DE CHAUFFAGE PORTABLES

À AIR FORCÉ

GUIDE DU PROPRIÉTAIRE

Dimensions de l’appareil de chauffage : 125 000, 170 000 et 200 000 BTU/heure

Appareil de chauffage au kérosène et diesel avec thermostat intégré

110429-01C

PORTABLE FORCED AIR HEATERS

OWNER’S MANUAL

For more information, visit www.desatech.com

Heater Sizes:

125,000 170,000 and 200,000 Btu/Hr

Kerosene/Diesel Heater with Built-in 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.......................... 5

STORING, TRANSPORTING, OR SHIPPING............................ 5

PREVENTATIVE MAINTENANCE SCHEDULE ......................... 6

TROUBLESHOOTING ................................................................ 7

SERVICE PROCEDURES .......................................................... 8

SPECIFICATIONS .................................................................... 13

ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST ....... 14

WHEELS AND HANDLE ........................................................... 18

WIRING DIAGRAM ................................................................... 19

REPLACEMENT PARTS .......................................................... 19

TECHNICAL SERVICE ............................................................. 19

ACCESSORIES ........................................................................ 19

OWNER’S REGISTRATION CARD .......................................... 21

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

WARNING: This product contains and/or generates chemicals known to the State of California to cause cancer or birth defects, or other reproductive harm.

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 ar-

eas 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.

For more information, visit www.desatech.com

• 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 4 feet (120 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.

• 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.

110429-01C

PRODUCT IDENTIFICATION

Hot Air

Upper Shell

Outlet

Lower Shell

Fuel Cap/ Gauge

Shroud

ON/OFF Switch

Thermostat Knob

PRODUCT IDENTIFICATION

UNPACKING

FUELS

VENTILATION

Handle

Fan Guard

Extension Cord Wrap

Control Cover

Ignition Control Assembly (On Inside of Control Cover)

Fuel Tank

Figure 1 - 125T, 170T and 200T Models

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

Rear Panel

VENTILATION

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

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)

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

110429-01C

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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

• Rubber Mallet/Hammer

• Flat Blade Screwdriver

1. Apply a couple drops of oil in shroud axle holes. Slide axle through shroud with a twisting motion. Install washers and wheels on axle as shown in Figure 3.

IMPORTANT:

wheels toward shroud (see Figure 3).

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

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

When installing wheels, point extended hub of

Fuel Tank

Figure 2 - 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

Shroud Axle Hole

Cap Nut

Figure 3 - Wheel and Handle Assembly

Axle

Wheel

Extended Hub

Washer

Handle

Air Inlet

Rear Panel

Washer

Screw

Extension Cord Wrap

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110429-01C

OPERATION

OPERATION WITH PORTABLE GENERATOR

STORING, TRANSPORTIN, OR SHIPPING

OPERATION

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 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 for starting, stopping, and resetting heater procedures.

Alternator

Ground Wire (#10 AWG Stranded-Copper)

Figure 4 - Typical Generator Grounding Method (Generator construction may vary from that shown)

Ground Lug

Copper or Brass Grounding Point

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

110429-01C

For more information, visit www.desatech.com

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, page 5

See Air Output, Air Intake, and Lint Filters, page 8

See Fuel Filter, page 9

See Fan, page 8

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110429-01C

TROUBLESHOOTING

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

TROUBLESHOOTING

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 (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 Diagram, page 19

5. If fan does not turn freely, see Pump Rotor, pages 12 and 13

6. See Ignition Control Assembly, page 13

7. Replace ignition control assembly

8. Replace motor

1. Fill tank with kerosene

2. See Pump Pressure Adjustment, page 9

3. See Fuel Filter, page 9

4. See Nozzle Assembly, pages 11 and 12

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

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

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110429-01C

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

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 Diagram, page 19

7. Replace ignitor, see page 10

8. Replace ignition control assembly

1. See Pump Pressure Adjustment, page 9

2. See Air Output, Air Intake, and Lint Filters, page 8

3. See Fuel Filter, page 9

4. See Nozzle Assembly, pages 11 and 12

5. Make sure photocell boot is properly seated in bracket

6. Clean photocell lens

7. Check electrical connections. See Wiring Diagram, page 19

8. Replace photocell

9. Replace ignition control assembly

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

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 5.

2. Lift upper shell off.

3. Remove fan guard.

Screw

Upper Shell

Figure 5 - Upper Shell Removal

FAN

IMPORTANT:

motor from heater. The weight of the motor resting on the fan could damage the fan pitch (see Figure 6).

1. Remove upper shell (see Figure 5).

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 7).

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 6 - Fan, Motor Shaft, and Setscrew Location

Figure 7 - Fan Cross Section

Motor Shaft

AIR OUTPUT, AIR INTAKE AND LINT FILTERS

1. Remove upper shell (see Figure 5).

2. Remove filter end cover screws using 5/16" nut-driver (see Figure 8).

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 6).

6. Replace filter end cover.

7. Replace upper shell.

IMPORTANT:

Figure 8 - 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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110429-01C

SERVICE PROCEDURES

Continued

SERVICE PROCEDURES

PUMP PRESSURE ADJUSTMENT

1. Remove fan guard using medium phillips screwdriver.

2. Remove pressure gauge plug from filter end cover (see Figure 9).

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

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

5. 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 10).

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

Relief Valve

Pressure Gauge Plug

Figure 9 - Pressure Gauge Plug Removal

Pressure Gauge

FUEL FILTER

1. Remove control cover screws using medium phillips screwdriver.

2. Remove control cover.

3. Pull upper fuel line off fuel filter neck (see Figure 11).

4. Carefully pry bushing, fuel filter, and lower fuel line out of fuel tank (see Figure 11).

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

Pump

Model Pressure

125T 6.0 PSI 170T 6.0 PSI 200T 6.2 PSI

Figure 10 - Adjusting Pump Pressure

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110429-01C

Figure 11 - Fuel Filter Removal

SERVICE PROCEDURES

Continued

IGNITOR

1. Remove upper shell (See Upper Shell Removal, page 8).

2. Remove fan (see page 8).

3. Remove 2 control cover screws with a phillips screwdriver. Remove control cover (see Figure 11, page 9).

4. Disconnect ignitor wires from ignition control assembly (see Figure 12). 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 12).

6. Remove combustion chamber . Stand combustion chamber on end with nozzle adapter bracket on top (see Figure 13).

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

8. Carefully remove replacement ignitor from styrofoam packing.

CAUTION: Do not bend or strike ignitor element.

Handle with care.

Combustion Chamber

Nozzle Adapter Bracket

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 13). 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 12).

12. Replace control cover (see Figure 11, page 9).

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 12.

14. Replace photocell in photocell bracket. Route wires as shown in either Figure 14, page 11.

15. Replace fan (see page 8).

16. Replace upper shell (see page 8).

Ignitor Screw/ Washer Assembly

Ignitor

Air Line Hose

Fuel Line Hose

Photocell Bracket

Photocell Assembly

Control Cover

Figure 12 - Disconnecting Ignitor Wires from Ignition Control Assembly (125T, 170T Model Shown)

Ignitor Wire

Ignition Control Assembly

Ignitor Element

Photocell Bracket

Combustion Chamber

Figure 13 - Ignitor Replacement (125T, 170T Model Shown)

Nozzle Adapter Bracket Opening

Nozzle Adapter Bracket

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110429-01C

SERVICE PROCEDURES

Continued

NOZZLE ASSEMBLY

SERVICE PROCEDURES

125T and 170T Models Only

1. Remove upper shell (see Upper Shell Removal, page 8).

2. Remove fan (see Fan, page 8).

3. Remove fuel and air line hoses from nozzle assembly (see Figure 14).

4. Turn nozzle assembly 1/4 turn to left and pull toward motor to remove (see Figure 15).

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 16).

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 16.

10. Attach nozzle assembly to nozzle adapter bracket (see Figure 15).

11. Attach fuel and airline hoses to nozzle assembly. See Fuel and Airline Replacement and Proper Routing, page 12.

12. Replace fan (see Fan, page 8).

13. Replace upper shell (see Upper Shell Removal, page 8).

Combustion Chamber

Nozzle Adapter Bracket

Photocell Bracket

Air Line Hose

Nozzle/ Adapter Assembly

Fuel Line Hose

Combustion Chamber

Figure 15 - Removing Nozzle/Adapter Assembly

Nozzle Face

Nozzle

Air Line Fitting

Figure 16 - Nozzle and Nozzle Adapter

Nozzle Sleeve

Nozzle/Adapter Assembly

Nozzle Adapter

Fuel Line Fitting

200T Model Only

1. Remove combustion chamber and ignitor by following steps 1 through 7 under Ignitor, page 10.

2. Carefully place the ignitor in a safe location.

3. Remove two nozzle adapter bracket screws (see Figure 17).

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

Combustion Chamber

Nozzle Adapter Bracket

Photocell Bracket

Nozzle/ Adapter Assembly

Figure 14 - Removing Air and Fuel Line Hoses (125T and 170T Models Only)

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110429-01C

Air Line Hose

Fuel Line Hose

Figure 17 - Removing Air and Fuel Line Hoses (200T Model Only)

SERVICE PROCEDURES

Continued

5. Carefully remove nozzle from nozzle adapter using 5/8" socket wrench (see Figure 18).

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, page 11.

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

Nozzle

Sleeve

Face

Nozzle

Nozzle Adapter Bracket

Air Line Fitting

Figure 18 - Nozzle and Nozzle Adapter

Nozzle Adapter

Fuel Line Fitting

FUEL AND AIR LINE REPLACEMENT AND PROPER ROUTING

1. Remove upper shell (see Upper Shell Removal, page 8).

2. Remove control cover screws using phillips screwdriver (see

Figure 11, 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 14 or Figure 17 according to model, page 11) and from fuel filter (see Fuel Filter, page 9). If air line hose is damaged, disconnect from nozzle adapter (see Figure 14 or Figure 17 according to model, page 11) and from barb fitting on pump end cover (see Figure 19).

5. Install new air and/or fuel line. Attach one end of air line hose

to barb fitting on pump end cover (see Figure 19) and the other end to nozzle adapter (see Figure 14 or Figure 17 according to model, page 11). Attach one end of fuel line hose to fuel filter (see Fuel Filter, page 9) and the other end to nozzle adapter (see Figure 14 or Figure 17 according to model, page 11).

Pump End Cover

Note:

Route hoses as shown in Figure 14 or Figure 17 accord-

ing to model, page 11. Hoses are not to touch photocell bracket.

6. Replace control cover.

7. Replace upper shell (see Upper Shell Removal, page 8).

PUMP ROTOR

(Procedure if Rotor is Binding)

1. Remove upper shell (see Upper Shell Removal, page 8).

2. Remove fan guard.

3. Remove filter end cover screws using 5/16" nut driver (see Figure 20).

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 20).

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 Figure21).

Note:

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

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

Blade

Pump Plate

Air Intake

Rotor

Insert

Air Output Filter

Figure 20 - Rotor Location

Gap Adjusting Screw

Blade

Filter

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

Filter End Cover

Air Hose

Figure 19 - Air Hose to Barb Fitting

For more information, visit www.desatech.com

Barb Fitting

Gap Adjusting Screw

Figure 21 - Gap Adjusting Screw Locations

Rotor

110429-01C

SERVICE PROCEDURES

Continued

SERVICE PROCEDURES

SPECIFICATIONS

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

12. Replace fan guard and upper shell (see Upper Shell Removal, page 8).

13. Adjust pump pressure (see Pump Pressure Adjustment, page 9).

Note:

If rotor is still binding, proceed as follows.

14. Perform steps 1 through 6, page 12.

15. Place ﬁne grade sandpaper (600 grit) on ﬂat surface. Sand rotor lightly in “ﬁgure 8” motion four times (see Figure 22).

16. Reinstall insert and rotor.

17. Perform steps 10 through 12, page 12.

Sandpaper

Figure 22 - Sanding Rotor

IGNITION CONTROL ASSEMBLY

WARNING: High voltage!

1. Unplug heater.

2. Remove control cover screws (2) using phillips screwdriver to expose ignition control assembly (see Figure 11, page 9).

3. Remove fuse cover.

4. Remove fuse from fuse clips.

5. Replace with new fuse (DESA Heating Products 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 11, page 9).

Fuse Clips

Fuse Cover

Fuse

Figure 23- Replacing Fuse

SPECIFICATIONS

Model Size 125T 170T 200T

Output Rating (Btu/Hr) 125,000 170,000 200,000 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

Fuel Consumption

(Gal. Per Hr/Liters Per Hr) .90/3.41 1.25/4.73 1.4/5.3

Pump Pressure (psi) 6.0 6.0 6.2 Electric Requirements 120 V/60 HZ 120 V/60 HZ 120 V/60 HZ

Amperage (Normal Run) 3.6 3.6 3.6 Maximum Motor Speed (RPM) 3400 3400 3400 Hot Air Output (CFM) 520 580 600 Motor Horsepower 1/5 1/5 1/4 Shipping Weight 77/34.9 78/35.4 83/37.6

(Approximate Pounds/Kilograms)

Heater Weight without Fuel 69/31.3 70/31.8 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.

110429-01C

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ILLUSTRATED PARTS BREAKDOWN

125T and 170T Models

ILLUSTRATED PARTS BREAKDOWN

125T Models 170T Models RH125T RH170T

RHD125T RHD170T RL125T RL170T M125T M170T RE125T RE170T

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

10-18

Motor and Pump Assembly

For more information, visit www.desatech.com

10-5

10-14

10-4

10-13

10-6

10-12

10-7

10-8

10-9

10-10

10-11

110429-01C

PARTS LIST

125T and 170T Models

125T Models 170T Models RH125T RH170T

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.

RHD125T RHD170T RL125T RL170T M125T M170T RE125T RE170T

KEY PART NO. NUMBER DESCRIPTION QTY.

1 107353-10 Upper Shell (Service Part Will

Be Black) 1 2 108631-01 Screw, #10-16 x 1" 3 3 098512-71 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 ∆ Burner Head Assembly 1 7-1 HA3027 Nozzle Assembly (125T) 1

HA3029 Nozzle Assembly (170T) 1 7-2 102548-03 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 M11084-26 Screw, #10-16 x 3/8" 2 9 097293-01 Fan (125T)

102042-01 Fan (170T) 1 10 ∆ Motor and Pump Assembly 1 10-1 102001-30 Motor 1 10-2 079975-02 Pump Body (125T) 1

079975-03 Pump Body (170T) 1 10-3 FHPF3-5C Screw, #10-32 x 5/8" (125T) 2

FHPF3-6C Screw, #10-32 x 3/4" (170T) 2 10-4 M22009*/** Rotor Insert 1 10-5 M22456-1* Pump Rotor (125T) 1

M22456-2** Pump Rotor (170T) 1 10-6 M50545 Pump End Cover 1 10-7 M12179*** Intake Filter 1 10-8 M16545 Filter End Cover 1 10-9 M8940∞ Steel Ball, 1/4" Diameter 1 10-10 M10993-1∞ Relief Spring 1 10-11 M27694∞ Adjusting Screw 1 10-12 M22997∞ Plug 1 10-13 M12461-31 Screw, #10-32 x 1" 4 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 (125T) 4

M8643-2** Blade (170T) 4

∆ 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) ** Included in Rotor Kit (Part No. HA3005)

KEY PART NO. NUMBER DESCRIPTION QTY.

10-18 M12461-31 Screw, #10-32 x 1" (125T) 6

M12461-32 Screw, #10-32 x 1 11 M50631 Rubber Bumper 2 12 101206-01 Motor Mounting Bracket 1 13 M11084-29 Screw, #10-16 x 3/4" 11 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 M51345-12 Fuel Line (125T) 1

M51345-09 Fuel Line (170T) 1 20 106896-01*** Fuel Filter 1 21 M51151-02 Fuel Line Tube 1 22 M10990-3 Rubber Bushing 1 23 M50814-08 Airline (125T) 1

M50814-03 Airline (170T) 1 24 107353-11 Lower Shell (Service Part Will

25 M50104-06 Bushing 2 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 1/4" 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 2 37 104460-01 Knob 1 38 104458-01 Thermostat 1 39 108458-01 Rear Panel 1 40 M12461-18 Screw, #8-32 x 7/8" 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

__ __

105880-02 Fuse (Not Shown) 1

097785-09 T-stat Foam Gasket (Not Shown) 1

/8" (170T) 6

Be Black) 1

110429-01C

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ILLUSTRATED PARTS BREAKDOWN

200T Models

ILLUSTRATED PARTS BREAKDOWN

200T Models M200T, RHD200T

RE200T, RH200T RL200T

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

10-3

10-17

10-16

10-15

10-18

Motor and Pump Assembly

For more information, visit www.desatech.com

10-5

10-14

10-4

10-13

10-6

10-12

10-7

10-8

10-9

10-10

10-11

110429-01C

PARTS LIST

200T Models

200T Models M200T, RHD200T

RE200T, RH200T RL200T

KEY PART NO. NUMBER DESCRIPTION QTY.

1 107353-10 Upper Shell (Service Part Will

Be Black) 1 2 108631-01 Screw, #10-16 x 1" 3 3 098512-69 Combustion Chamber 1 4 107791-01 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 102548-03 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 M11084-26 Screw, #10-16 x 3/8" 2 9 102042-01 Fan 1 10 10-1 102001-27 Motor 1 10-2 079975-03 Pump Body 1 10-3 FHPF3-6C Screw, #10-32 x 3/4" 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 M8940 10-10 M10993-1 10-11 M27694 10-12 M22997 10-13 M12461-31 Screw, #10-32 x 1" 4 10-14 M12244-1*** Output Filter 1 10-15 M11637*** Lint Filter 1 10-16 M50820-02 Barb Fitting 1 10-17 M8643-2** Blade 4

∆ Burner Head Assembly 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.

10-18 M12461-32 Screw, #10-32 x 1 11 M50631 Rubber Bumper 2 12 101206-01 Motor Mounting Bracket 1 13 M11084-29 Screw, #10-16 x 3/4" 11 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 M51345-04 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 107353-11 Lower Shell (Service Part Will

Be Black) 1 25 M50104-06 Bushing 2 26 M50104-01 Bushing 1 27 M12461-51 Screw, #10-16 x 1/2" 1 28 108708-01 Clip Nut 13 29 M10908-14 Screw, #8-32 x 1/4" 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 2 37 104460-01 Knob 1 38 104458-01 Thermostat 1 39 108458-01 Rear Panel 1 40 M12461-18 Screw, #8-32 x 7/8" 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

__ __

105880-02 Fuse 097785-09 T-stat Foam Gasket

(Not Shown) 1

/8"6

(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

110429-01C

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 M16801-5 Axle 1 6 108468-01 Washer 2 7 107426-01 Wheel Kit (Contains: 2

8 M28526 Cap Nut 2

2 Wheels and Cap Nuts)

For more information, visit www.desatech.com

110429-01C

WIRING DIAGRAM

TECHNICAL SERVICE

REPLACEMENT PARTS

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

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 Heating Products’ Technical Service Dept. at 1-866-672-6040.

When calling DESA Heating Products, 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.

White

Green

Black

Yellow

Black Thermostat

ON/OFF Switch

r P

with Light

TECHNICAL SERVICE

You may have further questions about installation, operation, or troubleshooting. If so, contact DESA Heating Products’ Technical Service Department at 1-866-672-6040. When calling please have your model and serial numbers of your heater ready.

You can also visit DESA Heating Products’ technical services web site at www.desatech.com.

PARTS NOT UNDER WARRANTY

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

When calling DESA Heating Products, have ready:

• model and serial numbers of your heater

• the replacement part number

For more information, visit www.desatech.com

110429-01C

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 Heating Products at 1-866-6726040 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.

IGNITION CONTROL ASSEMBLY/PHOTOCELL TESTER - HA1170

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

For more information, visit www.desatech.com

110429-01C

OWNER'S REGISTRATION FORM

Complete registration form and mail or complete on-line registration at www.desatech.com within 30 days after purchase.

Brand: Model: Date Purchased: Serial Number: First Name: Last Name: Address: City: State: Zip: Country: Phone: ( ) - E-Mail:

Please answer the following questions to register your product with DESA Heating Products:

1. Who will heater be used by? ❍ Individual ❍ Business

2. Will you use your heater in more than one location? ❍ Yes ❍ No

3. Where will the product be used? (You may select more than one.) ❍ Workshop ❍ Barn ❍ Residential Construction

❍ Commercial Construction ❍ Garage ❍ Factory ❍ Recreation ❍ Warehouse ❍ Utility Shed/Outbuilding ❍ Other ______________________________ (Specify)

4. Cost of product (excluding sales tax)? $________________________________

5. Maintenance/service work will be performed by: ❍ Self ❍ Service Center ❍ Other ___________________________________

6. If you bought this product yourself, did you plan to purchase this type of product before going into the store? ❍ Yes ❍ No

7. Type of store where product was purchased? ❍ Hardware ❍ Propane Dealer ❍ Natural Gas/Utility Co. ❍ Home Center or Builder’s Supply ❍ Farm/Ag. Supply ❍ Auto Parts ❍ Warehouse Club ❍ Industrial/Contractor Supply ❍ Rental Store ❍ Discount Store ❍ HVAC Dealer ❍ Other _________________________________________________

8. What is your primary source of heat? ❍ Propane (LP Gas) ❍ Natural Gas ❍ Kerosene ❍ Diesel ❍ Electric ❍ Other________________

9. What motivated you to buy this product? ❍ Sudden Cold Weather ❍ Replace Older Model ❍ D.I.Y. Home Project ❍ Emergency Back-Up Heat ❍ Heater on Sale ❍ Construction Project ❍ Hard to Heat Location ❍ Other ________________________________

10. How did you learn about this product brand? ❍ Advertisement ❍ Relative or Friend ❍ Co-Worker ❍ Store Representative ❍ Store Display ❍ Previously Owned a Heater ❍ Other _________________________________________________(Specify)

11. What other brands did you consider? ❍ None ❍ Master ❍ Remington ❍ All-Pro ❍ Dayton ❍ Universal ❍ Mr. Heater ❍ L.B. White Tradesman ❍ John Deere ❍ Dyna-Glo ❍ Dura-Heat ❍ Paulin ❍ Coleman ❍ Vogelzang American ❍ Other ___________________________________

12. Who selected the product? ❍ Male ❍ Female ❍ Both

13. Level of Education of Purchaser: ❍ High School ❍ Vocation/Technical School ❍ Some College ❍ Completed College ❍ Graduate School

14. Age of Purchaser: ❍ Under 20 ❍ 20 - 29 ❍ 30 - 39 ❍ 40 - 49 ❍ 50 - 59 ❍ 60 or Over

15. Buyer’s total annual household income: ❍ Under $19,999 ❍ $20,000 to $34,999 ❍ $35,000 to $49,999 ❍ $50,000 to $74,999 ❍ $75,000 to $99,999 ❍ $100,000 and Over

16. What is the population of your area? ❍ Under 10,000 ❍ 10,000 to 25,000 ❍ 25,000 to 50,000 ❍ 50,000 to 100,000 ❍ 100,000 to 250,000 ❍ Over 250,000

17. Store where product was purchased: Name: ______________________________________ City: _____________________________________ State: __________

18. In choosing this product, how important were the following:

Availability Price Brand Name Overall Quality Heat Output (Btu/Hr Rating) Variable Heat Output (Btu/Hr) Made in USA Warranty Local Service Value for Price

Not Somewhat Very

❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍

(Reddy Heater, Master, Remington, etc.) (R60, HD15, etc.)

Note:

Keep receipt for warranty verification.

7 or 9 digit number located on product or identification tag.

Not Somewhat Very

❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍

Size Prior Brand Experience Built-In Thermostat Ease of Operation Special Features Salesperson’s Recommendation Friend/Relative’s Recommendation Portability Quiet Operation

❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍

19. This question will allow us to better understand the demographic profile of our customers. Which of the following best describes you? (not required) ❍ African American ❍ Asian American ❍ Mexican ❍ Puerto Rican ❍ Cuban ❍ Other Hispanic ❍ White ❍ Other ___________________

110429-01C

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