Desa BTU-HR User Manual

KEROSENE/DIESEL PORTABLE FORCED AIR HEATERS

OWNER’S MANUAL

New

Straight

Shell

Design

HEATER SIZES: 40,000 50,000 55,000 60,000 70,000 110,000

115,000 155,000 165,000 AND 200,000 BTU/HR MODELS

H.S.I. SERIES

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

Unpacking ........................................................... 3

Product Identification .......................................... 3

Fuels ................................................................... 4

Ventilation ........................................................... 4

Theory of Operation ............................................ 4

Assembly ............................................................ 5

Operation ............................................................ 5

Operation With Portable Generator ..................... 6

Storing, Transporting, or Shipping ....................... 6

Preventative Maintenance Schedule................... 7

Troubleshooting ................................................... 7

Service Procedures ............................................. 9

Specifications .................................................... 15

Wiring Diagrams ............................................... 16

Illustrated Parts Breakdown and Parts List ....... 18

Replacement Parts ........................................... 30

Technical Service .............................................. 31

Accessories ....................................................... 31

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.

For more information, visit www.desatech.com

SAFETY INFORMATION

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:

bon 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 thoroughly 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 extinguished 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.

Early signs of car-

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 25 feet (762cm) 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 con-

fined 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 having jurisdiction.

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

• Heater must be grounded. Use only a properly
grounded three-wire 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; 4
feet (122 cm) from top; and 4 feet (122 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 three-square-foot (2800
square cm) opening of fresh, outside air for each
100,000 Btu/Hr (30 kw) 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.

2

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SAFETY INFORMATION

Continued

• 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 10 feet
(304.8cm). 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 accor-

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

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.

PRODUCT

IDENTIFICATION

Hot Air
Outlet

Fan Guard

Thermostat Knob
(Thermostat
Models Only)

Hot Air
Outlet

Fuel
Tank

Side Cover

Ignition Control
Assembly (On
Inside of Side
Cover)

Fan Guard

ON/OFF Switch
with Light

Thermostat Knob
(Thermostat
Models Only)

Fuel Cap/Gauge

Figure 2 - 50/55/60/70 Models

Thermostat Knob

Fuel

Hot Air Outlet

Fuel
Tank

Side Cover

Ignition Control
Assembly (On Inside
of Side Cover)

Cap/
Gauge

Fan Guard

ON/OFF Switch
with Light

(Thermostat
Models Only)

Figure 3 - 110/115/155/165 Models

Hot Air Outlet

Thermostat Knob
(Thermostat Models Only)

Air Filter
End
Cover

Fuel
Tank

Fuel
Tank

Side Cover

Ignition Control
Assembly (On Inside
of Side Cover)

Figure 1 - 40 Models

Fuel
Cap

Air Filter
End
Cover

Fuel Cap/
Gauge

Side Cover

Ignition Control
Assembly (On
Inside of Side
Cover)

Fan

Guard
ON/OFF Switch
with Light

Figure 4 - 200 Model

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FUELS

VENTILATION

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:

DIESEL ONLY (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

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:

quires one of the following:

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

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

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

A 200,000 Btu/Hr (58.6kw) heater re-

opening] raised 5 inches (12.7 cm)

opening] raised 8 inches (20.3 cm)

inches (38.1 cm)

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.

Combustion
Chamber

Ignitor

Fan

Air Pump

Motor

Air Intake Filter

Clean
Heated
Air Out

Fuel

Nozzle

Tank

Air For Fuel
System

Figure 5 - Cross Section Operational View

4

Fuel
Filter

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Air Line
To Burner

Air For
Combustion
And Heating

Ignition Control
Assembly

Cool
Air
In

Air Output
Filter

Fuel

ASSEMBLY

(FOR 110/115/155/165/200 MODELS
ONLY)

These models are furnished with wheels and a
handle. Some models are furnished with a second
handle also. Wheels, handle(s), and the mounting
hardware are found in the shipping carton.

Tools Needed

• Medium Phillips Screwdriver

• 3/8" Open or Adjustable Wrench

• Hammer

1. Slide axle through wheel support frame. Install
wheel spacers if provided. Install wheels on axle.

IMPORTANT:

extended hub of wheels toward wheel support
frame (see Figure 6).

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

3. Place heater on wheel support frame. Line up
holes on fuel tank flange with holes on wheel
support frame.

4. Place handle(s) on top of fuel tank flange. In­sert screws through handle(s), fuel tank flange,
and wheel support frame. Attach nut finger
tight after each screw is inserted.

5. After all screws are inserted, tighten nuts
firmly.

Hot Air
Outlet

Fuel
Tank
Flange

Wheel Support
Frame

Nut

Cap Nut

Figure 6 - Wheel and Handle Assembly,

110/115/155/165/200 Models Only

113282-01C 5

When installing wheels, point

Cord Cleat with Bolts
and Nuts (If Provided ­Set of Two for Right or
Left Side)

Screw

Axle

Wheel

Wheel Spacer
(If Provided)

Handle

Air
Inlet

Extended
Hub

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IMPORTANT: Review and under­stand the warnings in the

Information

They are 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

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

4. Attach fuel cap.

5. For thermostat models, turn thermostat knob

6. Plug heater’s power cord into approved,

7.

8. For thermostat models, adjust thermostat knob

TO STOP HEATER

Without ON/OFF Switch

Unplug extension cord from outlet.

With ON/OFF Switch

Push ON/OFF switch to OFF (O) position. Un­plug heater when not in use.

OPERATION

Safety

section, page 2.

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

oil, JET A or JP-8 fuel.

clockwise to the high position.

grounded, three-wire 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 AWG (1.0 mm2) rated cord

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

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

Note:

For heater without ON/OFF switch, ig­nitor will preheat for five seconds, then heater
will start.

Note:

For heater with ON/OFF switch, push
switch to ON(|) position and heater should start
in 5 seconds. If heater does not start, see
Troubleshooting, page 7.

to the desired setting.
affect the thermostat 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.

Note:

A cold heater may

OPERATION

Continued

TO RESTART HEATER

Wthout ON/OFF Switch

1. Unplug extension cord from outlet and wait
10 seconds. (Wait two minutes if heater has
been running.)

2. Repeat steps under To Start Heater.

With ON/OFF Switch

1. Push ON/OFF switch to OFF (O) position
and wait 10 seconds (2 minutes if heater has
been running).

2. Repeat steps under To Start Heater, page 5.

ON/OFF
Switch with
Light

Figure 7 - ON/OFF Switch, 50/55/60/70 Models

ON/OFF
Switch with
Light

Figure 8 - ON/OFF Switch, 110/115/155/

165/200 Models

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

Figure 9 - Typical Generator Grounding

Method (Generator construction may

vary from that shown)

Ground Lug

Copper or
Brass
Grounding
Point

Ground Wire (#10
AWG - Stranded­Copper)

STORING,

TRANSPORTING, OR

SHIPPING

Note:

If shipping, transport companies require fuel

tanks to be empty.

1. Drain fuel tank.
drain plug on underside of fuel tank. If so,
remove drain plug to drain all fuel. If heater
does not have drain plug, drain fuel through
fuel cap opening. Be sure all fuel is removed.

2. Replace drain plug if provided.

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. Replace fuel cap or drain plug. 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:

mer months for use during next heating season.
Using old fuel could damage heater.

Note:

Some models have

Do not store kerosene over sum-

6

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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 6

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

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

See Fuel Filter, page 10

See Fan, page 9

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

POSSIBLE CAUSE

1. No power to heater

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

3. If equipped, thermostat setting
is too low

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

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. Defective ignition control as­sembly

7. Defective motor

8. Blown fuse or ignitor control
assembly

113282-01C 7

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4. Check all electrical connec­tions. See Wiring Diagrams,
page 16

5. If fan does not turn freely, see
Pump Rotor, page 14

6 Replace ignition control as-

sembly

7. Replace motor

8. See Ignition Control Assem-
bly, page 15

FAULT CONDITION

Motor starts and runs but heater
does not ignite

TROUBLESHOOTING

Continued

POSSIBLE CAUSE

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. Fill tank with kerosene

2. See Pump Pressure Adjust-
ment, page 10

3. See Fuel Filter, page 10

4. See Nozzle Assembly, page 13

5. Drain and flush fuel tank with
clean kerosene. See Storing,

Transporting, or Shipping,

page 6

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

6. Bad electrical connection be­tween ignitor and ignition con­trol assembly

7. Defective ignitor

8. Defective ignition control as­sembly

9. 200 Model Only: Defective
fuel valve (Models equipped
with fuel valve only)

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 16

7. Replace ignitor, see page 11

8. Replace ignition control as­sembly

9. See Fuel Valve, page 11

1. See Pump Pressure Adjust-
ment, page 10

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

3. See Fuel Filter, page 10

4. See Nozzle Assembly, page 13

5. Make sure photocell boot is
properly seated in bracket

6. Clean photocell lens

7. Check electrical connections.
See Wiring Diagrams, page 16

8. Replace photocell

9. Replace ignition control as­sembly

8

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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.

UPPER SHELL REMOVAL

1. Remove screws along each side of heater using
5/16" nut-driver. These screws attach upper and
lower shells together. See Figure 10 or 11.

2. Lift upper shell off.

3. Remove fan guard.

Screw

Upper Shell

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 13).

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

8. Replace fan guard and upper shell.

Fan

Setscrew

Fan Guard

Figure 10 - Upper Shell Removal,

40/50/55/60/70 Models Only

Screw

Upper Shell

Motor Shaft

Figure 12 - Fan, Motor Shaft, and

Setscrew Location

Setscrew

Motor

Motor
Shaft

Figure 13 - Fan Cross Section

Fan

Flush

AIR OUTPUT, AIR INTAKE AND LINT
FILTERS

1. Remove upper shell (see Figure 10 or 11).

2. Remove filter end cover screws using 5/16" nut-

Fan
Guard

Figure 11 - Upper Shell Removal,
110/115/155/165/200 Models Only

FAN

IMPORTANT:

fore removing motor from heater. The weight of
the motor resting on the fan could damage the fan
pitch (see Figure 12).

1. Remove upper shell (see Figure 10 or 11).

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

3. Slip fan off motor shaft.

113282-01C 9

Remove fan from motor shaft be-

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driver (see Figure 14 or Figure 15, page 10).

3. Remove filter end cover.

4. Replace air output and lint filters.

5. Wash or replace air intake filter (see Preven-
tative Maintenance Schedule, page 7).

Air Intake Filter

Filter End
Cover

Lint Filter

Figure 14 - Air Output, Air Intake, and

Lint Filters, 40/50/55/60/70 Models Only

Air Output Filter

SERVICE PROCEDURES

Continued

6. Replace filter end cover.

7. Replace fan guard and upper shell.

IMPORTANT:

Lint Filter

Figure 15 - Air Output, Air Intake, and Lint

Filters, 110/115/155/165/200 Models Only

PUMP PRESSURE ADJUSTMENT

1. Remove pressure gauge plug from filter end
cover (see Figure 16).

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

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

4. Adjust pressure. Turn relief valve to right to
increase pressure. Turn relief valve to left to
decrease pressure. See specifications correct
pressure for each model (see Figure 17).

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

Pressure
Gauge
Plug

Do not oil filters.

Air Intake Filter

Filter End
Cover

Air Output Filter

Relief
Valve

FUEL FILTER

1. Remove side cover screws using 5/16" nut­driver.

2. Remove side cover.

3. Pull upper fuel line off fuel filter neck (see
Figure 18 or 19).

4. Carefully pry bushing, fuel filter, and lower
fuel line (110/115/155/165/200 Models only)
out of fuel tank (see Figure 19).

5.

Wash fuel filter with clean fuel and replace in tank.

6. Attach upper fuel line to fuel filter neck.

7. Replace side cover.

Fuel Filter and
Bushing

Side Cover

Figure 18 - Fuel Filter Removal,

40/50/55/60/70 Models

Fuel Filter, Bushing,
and Lower Fuel Line

Upper Fuel Line

Figure 16 - Pressure Gauge Plug

Removal (40/55/60/70 Models Shown)

Pump

Model Pressure

40 3.0 PSI
50 3.4 PSI
55 3.4 PSI
60 3.4 PSI

70 4.7 PSI
110 5.1 PSI
115 5.1 PSI
155 5.2 PSI
165 5.6 PSI
200 6.2 PSI

Pressure
Gauge

Figure 17 - Adjusting Pump Pressure

(40/50/55/60/70 Models Shown)

10

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Side
Cover

Upper Fuel Line

Figure 19 - Fuel Filter Removal,

110/115/155/165/200 Models

SERVICE PROCEDURES

Continued

IGNITOR

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

2. Remove fan (see page 9).

3. Remove 4 side cover screws with a 5/16" nut
driver. Remove side cover (see Figures 18 or
19, page 10).

4. Disconnect ignitor wires from ignition con­trol assembly (see Figure 20). 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 20).

6. Remove combustion chamber. Stand combus­tion chamber on end with nozzle adapter
bracket on top (see Figure 21 or 22).

7. Remove ignitor screw with a 1/4" nut driver for
models using ignitor HA1000 or 5/16" nut driver
for models using 102548-08 ignitor. Carefully
remove ignitor from nozzle adapter bracket.

CAUTION: Do not bend or

strike ignitor element. Handle

Combustion
Chamber

Air Line
Hose

Fuel
Line
Hose

Photocell
Bracket

Photocell
Assembly

Side Cover

Figure 20 - Disconnecting Ignitor Wires

from Ignition Control Assembly

Ignitor Screw/
Washer Assembly

Ignitor

Element
Photocell
Bracket

Nozzle
Adapter
Bracket

Ignitor

Ignitor
Wire

Ignition
Control
Assembly

Ignitor

Nozzle
Adapter
Bracket

with care.

8. Carefully remove replacement ignitor from
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 for models us­ing ignitor HA1000 or 5/16" nut driver for
models using 102548-08 ignitor (see Figure

23). 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 20).

12. Replace side cover (see Figures 18 or 19,
page 10).

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 (see Figures 23, 24
or 27, page 12).

15. Replace fan (see page 9).

16. Replace fan guard and upper shell (see page 9).

113282-01C 11

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Combustion
Chamber

Nozzle Adapter
Bracket Opening

Figure 21 - Ignitor HA1000 Replacement

Ignitor

Ignitor Element

Photocell
Bracket

Nozzle Adapter
Bracket Opening

Nozzle
Adapter
Bracket

Combustion
Chamber

Figure 22 - Ignitor 102548-08 Replacement

SERVICE PROCEDURES

Continued

Combustion
Chamber

Nozzle
Adapter
Bracket

Photocell
Bracket

Air Line
Hose

Figure 23 - Removing Air and Fuel Line

Hoses (40/50/55/60/70 Models Only)

Combustion
Chamber

Nozzle
Adapter
Bracket

Air Line
Hose

Fuel
Line
Hose

Figure 24 - Removing Air and Fuel Line

Hoses (110/115/155/165 Models Only)

NOZZLE ASSEMBLY

(For 40/50/55/60/70/110/115/155/165
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 23 or 24).

4. Turn nozzle assembly 1/4 turn to left and pull
toward motor to remove (see Figure 25).

Nozzle/
Adapter
Assembly

Fuel Line Hose

Nozzle/
Adapter
Assembly

Photocell
Bracket

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 26).

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 26.

10. Attach nozzle assembly to burner strap (see
Figure 25).

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

Combustion
Chamber

Nozzle/
Adapter
Assembly

Figure 25 - Removing Nozzle/Adapter

Nozzle Face

Nozzle

Nozzle Adapter

Assembly

Nozzle Sleeve

Air Line
Fitting

Fuel Line Fitting

Figure 26 - Nozzle and Nozzle Adapter

12

www.desatech.com 113282-01C

SERVICE PROCEDURES

Continued

(For 200 Model Only)

1. Remove combustion chamber and ignitor by
following steps 1 through 7 under Ignitor,
pages 11 and 12.

2. Carefully place the ignitor in a safe location.

3. Remove two nozzle adapter bracket screws
(see Figure 27).

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 28).

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 11.

Combustion
Chamber

Nozzle
Adapter
Bracket

Nozzle
Adapter
Bracket
Screw

FUEL AND AIR LINE REPLACEMENT
AND PROPER ROUTING

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

2. Remove side cover screws using 5/16" nut
driver (see Figure 18 or 19, page 10).

3. Remove side 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 23 or 24,
page 12, or Figure 27) and from fuel filter (see
Fuel Filter, page 10). If air line hose is dam­aged, disconnect from nozzle adapter (see Fig­ure 23 or 24, page 12, or Figure 27) and from
barb fitting on pump end cover (see Figure 29).

5. Install new air and/or fuel line. Attach one end
of air line hose to barb fitting on pump end cover
(see Figure 29) and the other end to nozzle
adapter (see Figure 23 or 24, page 12, or Figure

27). Attach one end of fuel line hose to fuel fil­ter (see Fuel Filter, page 10) and the other end
to nozzle adapter (see Figure 23 or 24, page 12,
or Figure 27).

Note:

Route hoses as shown in see Figure 23
or 24, page 12, or Figure 27, according to
model. Hoses are not to touch photocell
bracket.

6. Replace side cover.

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

Photocell
Bracket

Air Line
Hose

Figure 27 - Removing Air and Fuel Line

Hoses (200 Model Only)

Nozzle Face

Nozzle

Nozzle
Adapter
Bracket

Nozzle
Sleeve

Air Line
Fitting

Nozzle/
Adapter
Assembly

Fuel Line Hose

Nozzle
Adapter

Fuel Line Fitting

Pump End Cover

40/50/55/60/70

Models

Barb
Fitting

Air Hose

Barb Fitting

110/115/155/165/200

Models

Figure 29 - Air Hose to Barb Fitting

Figure 28 - Nozzle and Nozzle Adapter

113282-01C 13

www.desatech.com

SERVICE PROCEDURES

Continued

PUMP ROTOR

(Procedure if Rotor is Binding)

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

2. Remove filter end cover screws using 5/16"
nut driver (see Figure 30 or 31).

3. Remove filter end cover and air filters.

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

5. Remove pump plate.

6. Remove rotor, insert, and blades (see Figure
30 or 31).

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

8. Install insert and rotor.

9. Check gap on rotor. Adjust to .076/.101 mm
(.003"/.004") if needed (see Figure 32).

Note:

Rotate rotor one full turn to ensure the
gap is .076/.101 mm (.003"/.004") at tightest
position. Adjust if needed.

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

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

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

Note:

If rotor is still binding, proceed as

follows.

13. Perform steps 1 through 6.

14. Place fine grade sandpaper (600 grit) on flat
surface. Sand rotor lightly in “figure 8” mo­tion four times (see Figure 33).

15. Reinstall insert and rotor.

16. Perform steps 10 through 12.

Pump
Plate

Air Intake
Filter

Filter
End
Cover

Blade

Blade

Pump Plate

Air
Intake
Filter

Insert

Rotor

Air Output Filter

Filter End Cover

Figure 31 - Rotor Location, 110/115/155/

165/200 Models

Gap Adjusting Screw

Blade

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

Rotor

Gap Adjusting Screw

Figure 32 - Gap Adjusting Screw Locations

Sandpaper

Figure 33 - Sanding Rotor

Insert

Rotor

Air Output Filter

Figure 30 - Rotor Location, 40/50/55/60/

70 Models

14

www.desatech.com 113282-01C

SERVICE PROCEDURES

Continued

IGNITION CONTROL ASSEMBLY

Fuse Clips

Fuse
Cover

WARNING: High voltage!

1. Unplug heater.

2. Remove side cover screws (4) using 5/16" nut­driver to expose ignition control assembly.

3. Remove fuse cover (see Figure 34).

4. Remove fuse from fuse clips (see Figure 34).

5. Replace fuse with fuse of the same type and
rating (GMA-10). Do not substitute a fuse with
a higher current rating.

6. Replace fuse cover (see Figure 34).

7. Replace side cover (see Figures 18 or 19,
page 10).

Figure 34 - Replacing Fuse

Fuse

SPECIFICATIONS

Model Size 40 50/55/60 70 110/115 155 165 200

Output Rating (Btu/Hr) 40,000 50/55/ 70,000 110,000 155,000 165,000 200,000

Fuel Use only kerosene, #1/#2 diesel/fuel oil, JET A or JP-8 fuels*
Fuel Tank Capacity

(U.S. Gal./Liters) 3/11.3 5/18.9 5/18.9 9/34 13.5/51 13.5/51 13.5/51

Fuel Consumption

(Gal. Per Hr/Liters Per Hr) .3/1.14 .44/1.67 .52/1.97 .85/3.00 1.14/4.31 1.2/4.54 1.4/5.3
Pump Pressure (psi) 3.0 3.4 4.7 5.1 5.2 5.6 6.2
Electric Requirements 120 V/60 HZ (Same All Models)
Amperage (Normal Run) 2.0 2.0 2.8 3.6 3.6 3.6 3.6
Motor RPM 1725 1725 3440 3400 3400 3400 3400
Hot Air Output (CFM) 170 180 360 490 550 575 600
Motor HP 1/15 1/15 1/8 1/5 1/5 1/5 1/4
Shipping Weight 32/14.5 34/15.4 36/16.3 56/25.4 69/31.3 71/32.2 83/37.6

(Approximate Pounds/Kilograms)
Heater Weight without Fuel 28/12.7 30/13.6 32/14.5 48/21.8 60/27.2 61/27.7 72/32.7

(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.

& 60,000 & 115,000

113282-01C 15

www.desatech.com

WIRING DIAGRAMS

Photocell

Photocell

Ignitor

Motor Return

AC Neutral (L2)

120V (L1)

Ignition Control Assembly

Motor

Ignitor

Blue

Blue

White

Red

Black

Yellow

(40 Models)

Photocell

Green

White

Motor

Ignitor

Green

Yellow

Power Plug

120V/60Hz

Photocell

Photocell

Ignitor

Motor Return

AC Neutral (L2)

120V (L1)

Ignition Control Assembly

Motor

Ignitor

Blue

Blue

White

Green

Red

Black

Yellow

Photocell

Motor

Ignitor

Green

Black

Yellow

Black

White

2

1

Power Plug

120V/60Hz

ON/OFF Switch

with Light

(50/55/60/70/110/115/155/165/200 Models)

Figure 35 - Wiring Diagram without Thermostat

(40/50/55/60/70/110/115/155/165/200 Models with Ignitor HA1000)

Photocell

Photocell

Ignitor

Motor Return

AC Neutral (L2)

120V (L1)

Ignition Control Assembly

Motor

Ignitor

Blue

Blue

White

Green

Red

Black

Tan

Photocell

Motor

Ignitor

Green

Black

Ta n

White

2

1

Power Plug
120V/60Hz

ON/OFF Switch

3

3

with Light

Figure 36 - Wiring Diagram without Thermostat

(50/55/60 Models with Ignitor 102548-08)

16

www.desatech.com 113282-01C

WIRING DIAGRAMS

Continued

Photocell

Photocell

Ignitor

Motor Return

AC Neutral (L2)

120V (L1)

Ignition Control Assembly

Motor

Ignitor

Blue

Blue

White

Green

Red

Black

Yellow

Photocell

White

Motor

Ignitor

Green

Yellow

Thermostat

Power Plug
120V/60Hz

Black

(40 Models)

Photocell

Photocell

Ignitor

Motor Return

AC Neutral (L2)

120V (L1)

Ignition Control Assembly

Motor

Ignitor

Blue

Blue

White

Green

Red

Black

Yellow

Photocell

Motor

Ignitor

White

Green

Black

2

1

Yellow

Black
Thermostat

Power Plug
120V/60Hz

3

ON/OFF Switch

with Light

(50/55/60/70/110/115/155/165/200 Models)

Figure 37 - Wiring Diagram with Thermostat

(40/50/55/60/70/110/115/155/165/200 Models with Ignitor HA1000)

Photocell

Photocell

Blue

Blue

Photocell

White

Ignitor

Motor

Ignitor

Green

Black

2

1

Ta n

Black
Thermostat

Power Plug
120V/60Hz

3

ON/OFF Switch

with Light

Motor Return

AC Neutral (L2)

120V (L1)

Ignition Control Assembly

Motor

Ignitor

White

Green

Red

Black

Tan

Figure 38 - Wiring Diagram with Thermostat

(50/55/60 Models with Ignitor 102548-08)

113282-01C 17

www.desatech.com

5

ILLUSTRATED PARTS BREAKDOWN

STANDARD MODEL
R40, REM40, PK40, UK40, TK40, N40

THERMOSTAT MODELS
R40T, REM40T, PK40T, UK40T, TK40T, N40T

4

1

22

27

16

11

2

24

26

38

110/115 Burner Head Assembly

9-1

9-2

12

9-3

9-4

9-

13

5

35

3

9

6

7

8

21

34

30

29

28

20

10

18

23

25

37

39

19

17

31

18

www.desatech.com 113282-01C

36

32

33

15

14

PARTS LIST

40 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.

KEY PART
NO. NUMBER DESCRIPTION QTY.

1 M51104-01 Handle 1
2 098511-67 Upper Shell (Service Part Will Be Black) 1
3 M11084-29 Screw, #10-16 x 3/4" 2
4 M15823-27 Screw, #10-16 x 1 1/2" 6
5 098512-58 Combustion Chamber 1
6 M10908-2 Screw, #6-32 x 3/8" 2
7 103154-03 Photocell Bracket 1
8 M16656-24 Photocell Assembly 1
9 (See page 26) Burner Head Assembly
10 M11084-26 Screw, #10-16 x 3/8" 2
11 103684-01 Fan 1
12 (See page 27) Motor and Pump Assembly 1
13 M51105-01 Fan Guard 1
14 098219-38 Power Cord 1
15 M11143-1 Strain Relief Bushing 1
16 NTC-4C Hex Lock Nut, 1/4-20 2
17 M11084-26 Screw, #10-16 x 3/8" 8
18 M50631 Rubber Bumper 2
19 097461-16 Side Cover 2
20 101205-01 Motor Bracket 1
21 M50104-06 Bushing 1
22 M11271-8 Clip Nut 6
23 M50104-02 Bushing 1
24 M11084-26 Screw, #10-16 x 3/8" 6
25 M10908-14 Screw, #8-32 x 3/8" 1
26 098511-234 Lower Shell (Service Part Will Be Black) 1
27 M50814-06 Rubber Airline 1
28 079973-01 Fuel Line 1
29 M50876-04 Fuel Filter with bushing 1
30 M10990-3 Rubber Bushing 1
31 102349-01 PCB Support 5
32 104068-02 Ignition Control Assembly 1
33 097702-01 Fuel Cap (Includes Gasket) 1
34 108088-01 Fuel Tank 1
35 M51108-01 Shell Heat-Shield 1
36 104458-01 Thermostat 1
37 M12461-18 Screw, #8-32 x 7/8" 1
38 104460-01 Thermostat Knob 1
39 WLE-2 Lock Washer, EXT #8 1

PARTS AVAILABLE - NOT SHOWN

103814-01 Wire Tie (For Ignition Control Assembly) 1
M9900-170 Wire Assembly

(Thermostat to Ignition Control Assembly) 1

113282-01C 19

www.desatech.com

ILLUSTRATED PARTS BREAKDOWN

STANDARD MODEL

R50, REM50, R55C, R60A, PK55, UK55,TK50, TK55,B55C, REM60A, R70E, B70E, RM60A,
PK60, UK60, PK70, UK70

THERMOSTAT MODELS

R50T, REM50T, R55CT, R60AT, PK55T, UK55T,TK50T, TK55T, B55CT, REM60AT, R70ET,
B70ET, RM60T, PK60T, UK60T, PK70T, UK70T

4

1

5

35

3

9

6

7

8

21

22

34

10

18

20

23

25

28

30

29

2

9-1

9-5

11

9-4

9-3

12

13

16

24

26

27

38

37

39

19

17

31

20

www.desatech.com 113282-01C

36

32

33

15

14

40

PARTS LIST

50/55/60/70 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.

KEY PART
NO. NUMBER DESCRIPTION QTY.

1 M51104-01 Handle 1
2 098511-67 Upper Shell (Service Part Will Be Black) 1
3 M11084-29 Screw, #10-16 x 3/4" 2
4 M15823-27 Screw, #10-16 x 1 1/2"6
5 098512-50 Combustion Chamber (50/55/60) for use with

098512-76 Combustion Chamber (50/55/60) for use with

098512-51 Combustion Chamber (70) 1
6 M10908-2 Screw, #6-32 x 3/8" 2
7 103154-03 Photocell Bracket 1
8 M16656-24 Photocell Assembly 1
9

(See page 26)

10 M11084-26 Screw, #10-16 x 3/8" 2
11 103684-01 Fan (50/55/60) 1

M29678 Fan (70) 1
12

(See page 27)

13 M51105-01 Fan Guard 1
14 113065-01 Power Cord 1
15 M11143-1 Strain Relief Bushing 1
16 NTC-4C Hex Lock Nut, 1/4-20 2
17 M11084-26 Screw, #10-16 x 3/8" 8
18 M50631 Rubber Bumper 2
19 097461-16 Side Cover 2
20 101205-01 Motor Bracket 1
21 M50104-06 Bushing 1
22 M11271-8 Clip Nut 6
23 M50104-02 Bushing 1
24 M11084-26 Screw, #10-16 x 3/8" 6
25 M10908-14 Screw, #8-32 x 3/8" 1
26 098511-234 Lower Shell (Service Part Will Be Black) 1
27 M50814-06 Rubber Airline 1
28 079973-01 Fuel Line 1
29 M50876-05 Fuel Filter with bushing 1
30 M10990-3 Rubber Bushing 1
31 102349-01 PCB Support 5
32 104068-02 Ignition Control Assembly 1
33 097663-04 Fuel Cap w/ Gauge (includes Gasket)

113280-01 Fuel Cap w/ Gauge (includes Gasket)

34 108088-16 Fuel Tank (Metal Filler Neck) 1

113279-01 Fuel Tank (Plastic Filler Neck) 1
35 M51108-01 Shell Heat-Shield 1
36 104458-01 Thermostat 1
37 M12461-18 Screw, #8-32 x 7/8" 1
38 104460-01 Thermostat Knob 1
39 WLE-2 Lock Washer, EXT #8 1
40 113461-01 ON/OFF Switch 1

103814-01 Wire Tie (For Ignition Control Assembly) 1

M9900-170 Wire Assembly

079010-46 Wire Assembly (Connects Switch to Thermostat

Ignitor HA1000 1

Ignitor 102548-08 1

Burner Head Assembly

Motor and Pump Assembly 1

(Use with Fuel Tank 108088-16) 1

(Use with Fuel Tank 113279-01) 1

PARTS AVAILABLE - NOT SHOWN

(Thermostat to Ignition Control Assembly) 1

or Ignition Control) 1

113282-01C 21

www.desatech.com

ILLUSTRATED PARTS BREAKDOWN

7

a

STANDARD MODELS
PK110, R110D, R115D, B115D, PK115, UK110, TK110, TK115, REM115D, RM115D,
B155D, REM155D, R165D, RM155D, PK155, UK155, TK155, B165D, R155D, B110D,
RM110D, RM165D, REM110D, REM165D, PK165, UK165

THERMOSTAT MODELS
R110DT, R115DT, B115DT, REM115DT, RM115DT, PK115T, UK110T, TK110T, TK115T,
B155DT, REM155DT, R165DT, RM155DT, B165DT, PK155T, UK155T, TK155T, R155DT,
B110DT, RM110DT, RM165DT, PK165T, UK165T, TK165T, REM110DT, REM165DT,
SB115DT, SB165DT

2

1

Upper Tier Burner He

7-1

3

7

4

28

31

5

6

23

24

20

22

21

30

8

11

19

25

18

29

9

12

15

26

27

38

7-4

7-5

10

16

37

13

39

14

35

36

32

22

14

17

www.desatech.com 113282-01C

33

34

40

PARTS LIST

110/115/155/165 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.

KEY PART
NO. NUMBER DESCRIPTION QTY.

1 098511-292 Upper Shell (Service Part Will Be Black) 1
2 M15823-27 Screw, #10-16 x 1/2" 8
3 098512-71 Combustion Chamber (110/115) 1

098512-74 Combustion Chamber (155) 1
098512-75 Combustion Chamber (165) 1

4 103154-05 Photocell Bracket (110/115) 1

M16660-02 Photocell Bracket (155/165) 1
5 M10908-2 Screw, #6-32 x 3/8" 2
6 M16656-24 Photocell Assembly 1
7

(See page 26)

8 M11084-26 Screw, #10-16 x 3/8" 2
9 097293-01 Fan (110/115/155) 1

102042-01 Fan (165) 1
10

(See page 28)

11 M50631 Rubber Bumper 2
12 101206-01 Motor Mounting Bracket 1
13 M12461-18 Screw, #8-32 x 7/8" 1
14 104068-02 Ignition Control Assembly 1
15 NTC-4C Hex Lock Nut, 1/4-20 2
16 111037-01 Fan Guard 1
17 M27417 Drain Plug (Includes “o” Ring) 1
18 107878-02 Button Plug 1
19 M51345-06 Fuel Line 1
20 106896-01 Fuel Filter 1
21 M51151-01 Fuel Line Tube (110/115) 1

M51151-02 Fuel Line Tube (155/165) 1
22 M10990-3 Rubber Bushing 1
23 M50814-03 Airline 1
24 098511-293 Lower Shell (Service Part Will Be Black) 1
25 M50104-06 Bushing 1
26 M50104-01 Bushing 1
27 M11084-26 Screw, #10-16 x 3/8" 6
28 M11271-8 Clip Nut 8
29 M10908-14 Screw, #8-32 x 3/8" 1
30 108088-11 Fuel Tank (Metal Filler Neck) 110/115 1

108088-10 Fuel Tank (Metal Filler Neck) 155/165 1

113279-02 Fuel Tank (Plastic Filler Neck) 110/115 1

113279-03 Fuel Tank (Plastic Filler Neck) 155/165 1
31 097663-02 Fuel Cap w/ Gauge (includes Gasket) 110/115

097663-03 Fuel Cap w/ Gauge (includes Gasket) 155/165

113280-02 Fuel Cap w/ Gauge (includes Gasket) 110/115

113280-03 Fuel Cap w/ Gauge (includes Gasket) 110/115

32 102349-01 P.C. Board Support 5
33 M11143-1 Strain Relief Bushing 1
34 113065-01 Power Cord 1
35 M51077-18 Side Cover 2
36 M11084-26 Screw, #10-16 x 3/8" 8
37 104460-01 Thermostat Knob 1
38 104458-01 Thermostat 1
39 WLE-2 Lock Washer, EXT #8 1
40 113461-01 ON/OFF Switch with Light 1

103814-01 Wire Tie (Not Shown - Groups wires connected

M9900-77

079010-46 Wire (Not Shown - Connects ON/OFF Switch to Ignition

113282-01C 23

Burner Head Assembly 1

Motor and Pump Assembly 1

(Use with Fuel Tank 108088-11) 1

(Use with Fuel Tank 108088-10) 1

(Use with Fuel Tank 113279-02) 1

(Use with Fuel Tank 113279-03) 155-165 1

to Ignition Control Assembly) 1
Wire (Not Shown - Connects T-stat to Ignition Control Assembly)

Control Assembly or Thermostat if Equipped) 1

www.desatech.com

1

ILLUSTRATED PARTS BREAKDOWN

STANDARD MODELS

R200B, PK200, UK200, TK200

THERMOSTAT MODELS

RM200BT, B200BT, PK200T, UK200T, TK200T, REM200BT, R200BT

2

1

3

37

38

4

6

24

28

31

30

35

36

32

7

5

23 19

20

14

17

8

11

25

29

22

21

43

9

10

16

12

15

13

26

27

42

41

44

40

14

18

33

34

39

24

www.desatech.com 113282-01C

PARTS LIST

200 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.

KEY PART
NO. NUMBER DESCRIPTION QTY.

1 107353-10 Upper Shell (Service Part Will Be Black) 1
2 M15823-27 Screw, #10-16 x 1/2" 8
3 098512-69 Combustion Chamber 1
4 103154-05 Photocell Bracket 1
5 M10908-2 Screw, #6-32 x 3/8" 2
6 M16656-24 Photocell Assembly 1
7

(See page 26)

8 M11084-26 Screw, #10-16 x 3/8" 2
9 102042-01 Fan 1
10

(See page 29)

11 M50631 Rubber Bumper 2
12 101206-01 Motor Mounting Bracket 1
13 097785-04 Foam Gasket 2
14 104068-02 Ignition Control Assembly 1
15 NTC-4C Hex Lock Nut, 1/4-20 2
16 102756-01 Fan Guard 1
17 M27417 Drain Plug (Includes “o” Ring) 1
18 103523-01 Rubber Bushing 1
19 M51345-03 Fuel Line (Models with Fuel Valve Assembly) 1

M51345-04 Fuel Line (Models without Fuel Valve Assembly) 1
20 M51150-01 Fuel Filter 1
21 M51345-04 Fuel Line Tube

M51151-02 Fuel Line Tube (Models without Fuel Valve Assembly) 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 M11084-26 Screw, #10-16 x 3/8" 6
28 M11271-8 Clip Nut 8
29 M10908-14 Screw, #8-32 x 3/8" 1
30 108088-17 Fuel Tank (Metal Filler Neck) 1

113279-04 Fuel Tank (Plastic Filler Neck) 1
31 097663-03 Fuel Cap w/ Gauge (includes Gasket)

113280-03 Fuel Cap w/ Gauge (includes Gasket)

32 102349-01 P.C. Board Support 5
33 M11143-1 Strain Relief Bushing 1
34 113065-01 Power Cord 1
35 107333-04AA Side Cover 1
36 M11084-26 Screw, #10-16 x 3/8" 8
37 099230-01 Screw, Special 2
38 M11084-27 Screw, #10-16 x 1/2" 2
39 113461-01 ON/OFF Switch with Cover 1
40 104458-01 Thermostat 1
41 M12461-18 Screw, #8-32 x 7/8" 1
42 104460-01 Thermostat Knob 1
43 079010-35 Wire Assembly 1
44 WLE-2 Lock Washer, EXT #8 1

103814-01 Wire Tie

100621-06 Thermostat Decal (Not Shown) 1

079010-46 Wire (Not Shown - For ON/OFF Switch) 1

Burner Head Assembly 1

Motor and Pump Assembly 1

(Models with Fuel Valve Assembly)

(Use with Fuel Tank 108088-17) 1

(Use with Fuel Tank 113279-04) 1

(Not Shown - For Ignition Control Assembly)

1

1

113282-01C 25

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ILLUSTRATED PARTS BREAKDOWN

BURNER HEAD ASSEMBLY FOR 40/50/55/60/70 MODELS WITH HA1000 IGNITOR

1

2

4

3

BURNER HEAD ASSEMBLY FOR 50/55/60 MODELS WITH 102548-08 IGNITOR

KEY PART
NO. NUMBER DESCRIPTION QTY.

5

1 HA3006 Nozzle Assembly (40) 1

HA3024 Nozzle Assembly (50/55/60) 1

HA3026 Nozzle Assembly (70) 1
2 HA1000 Ignitor Kit 1
3 104056-01 Nozzle Adapter 1
4 102336-01 Nozzle Adapter Bracket 1
5 M10908-75 Screw, Hex Head, Tapping 1
6 103347-01 Belleville Washer 1

1

2

4

3

KEY PART

NO. NUMBER DESCRIPTION QTY.

1 HA3024 Nozzle Assembly 1
2 102548-08 Ignitor Kit 1
3 102336-05 Nozzle Adapter Bracket 1
4 104056-01 Nozzle Adapter 1

BURNER HEAD ASSEMBLY FOR 110/115/155/165 MODELS

1

6

2

KEY PART
NO. NUMBER DESCRIPTION QTY.

3

1 HA3027 Nozzle Assembly (110/115) 1

HA3028 Nozzle Assembly (155/165) 1
2 HA1000 Ignitor Kit 1
3 M10908-75 Screw, #6-32 x 7/8" 1
4 102336-01 Nozzle Adapter Bracket 1
5 104054-01 Nozzle Adapter 1
6 103347-01 Washer 1

4

5

NOZZLE/BURNER HEAD ASSEMBLY FOR 200 MODELS

1

2

5

3

7

4

6

11

KEY PART
NO. NUMBER DESCRIPTION QTY.

1 100735-13 Nozzle Assembly 1

8

2 M10659-1 Nozzle Washer 2

9

3 M10809-1 Nozzle Spring 1
4 M8882 Nozzle Sleeve 1
5 107272-01 Retaining Ring 1
6 102336-03 Nozzle Adapter Bracket 1
7 HA1000 Ignitor Kit 1
8 103347-01 Belleville Washer 1

10

9 M10908-75 Screw, #6-32 x .88 1
10 107273-01 Nozzle Adapter 1
11 M50820-02 Barb Fitting 1

26

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ILLUSTRATED PARTS BREAKDOWN

MOTOR AND PUMP ASSEMBLY FOR 40/50/55/60/70 MODELS

1

2

3

4

6

12

7

8

9

13

10

11

19

18

17

16

5

15

14

KEY PART
NO. NUMBER DESCRIPTION QTY.

1 102001-28 Motor (40/50/55/60) 1

102001-29 Motor (70) 1

2 079975-03 Pump Body (50/55/60) 1

079975-02 Pump Body (40/70) 1
3 M22009**, *** Insert 1
4 M22456-2** Rotor (50/55/60) 1

M22456-1*** Rotor (40/70) 1
5 M29608 Pump End Cover 1
6 M29632 ⊕ Lint Filter 1
7 M29633 ⊕ Intake Filter 1
8 M29609 Filter End Cover 1
9 M12461-31 Screw, #10-32 x 1" 3
10 M27694 ∞ Adjusting Screw 1
11 M10993-1 ∞ Pressure Relief Spring 1
12 M22997 ∞ Plug 1
13 M8940 ∞ Steel Ball, 1/4" Diameter 1
14 M29612-01 ⊕ Output Filter 1
15 M12461-32 Screw, #10-32 x 1

M12461-31 Screw, #10-32 x 1" (40/70) 6
16 103676-01 Nylon Elbow, 90° 1
17 M8643-2** Blade (50/55/60) 4

M8643*** Blade (40/70) 4
18 FHPF3-6C Screw, #10-32 x 3/4" (50/55/60) 2

FHPF3-5C Screw, #10-32 x 5/8" (40/70) 2
19 105780-01 Plastic Cap 1

** Included in Rotor Kit (Part No. HA3005) *** Included in Rotor Kit (Part No. HA3004)
⊕ Included in Filter Kit (Part No. HA3014) ∞ Included in Pump Adjustment Kit (Part No. HA3020)

1

/8" (50/55/60) 6

113282-01C 27

www.desatech.com

ILLUSTRATED PARTS BREAKDOWN

MOTOR AND PUMP ASSEMBLY FOR 110/115/155/165 MODELS

1

2

3

4

5

17

16

15

13

KEY PART
NO. NUMBER DESCRIPTION QTY.

1 102001-30 Motor 1
2 079975-02 Pump Body 1
3 FHPF3-5C Screw, #10-32 x 5/8" 2
4 M22009** Rotor Insert 1
5 M22456-1** Pump Rotor 1
6 M50545 Pump End Cover 1
7 M12179*** Intake Filter 1
8 M16545 Filter End Cover 1
9 M8940∞ Steel Ball, 1/4" Diameter 1
10 M10993-1∞ Relief Spring 1
11 M27694∞ Adjusting Screw 1
12 M22997∞ Plug 1
13 M12461-31 Screw, #10-32 x 1" 10
14 M12244-1*** Output Filter 1
15 M11637*** Lint Filter 1
16 104096-01 Fitting, Straight Nylon Barb 1
17 M8643** Blade 4

** Included in Rotor Kit (Part No. HA3004)

∗∗∗ Included in Filter Kit (Part No. HA3017)
∞ Included in Pump Adjustment Kit (Part No. HA3020)

14

6

7

13

12

11

8

9

10

28

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ILLUSTRATED PARTS BREAKDOWN

MOTOR AND PUMP ASSEMBLY FOR 200 MODELS

1

2

3

4

5

17

16

15

18

KEY PART
NO. NUMBER DESCRIPTION QTY.

1 102001-27 Motor 1
2 079975-03 Pump Body 1
3 FHPF3-6C Screw, #10-32 x 5/8" 2
4 M22009** Rotor Insert 1
5 M22456-2** Pump Rotor 1
6 M50545 Pump End Cover 1
7 M12179*** Intake Filter 1
8 M16545 Filter End Cover 1
9 M8940∞ Steel Ball, 1/4" Diameter 1
10 M10993-1∞ Relief Spring 1
11 M27694∞ Adjusting Screw 1
12 M22997∞ Plug 1
13 M12461-31 Screw, #10-32 x 1" 4
14 M12244-1*** Output Filter 1
15 M11637*** Lint Filter 1
16 M50820-02 Barb Fitting 1
17 M8643-2** Blade 4
18 M12461-32 Screw, #10-32 x 1.12" 6
19 105780-01 Plastic Cap 1

∗∗∗ Included in Filter Kit (Part No. HA3017)
** Included in Rotor Kit (Part No. HA3005)
∞ Included in Pump Adjustment Kit (Part No. HA3020)

6

14

13

7

8

9

10

19

11

12

113282-01C 29

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ILLUSTRATED PARTS BREAKDOWN

WHEELS AND HANDLE PARTS LIST

9

2

3

4

5

6

KEY PART PART
NO. NUMBER DESCRIPTION QTY.

1 HA2303 Handle (110/115) 2 (If Equipped)

HA2304 Handle (155/165/200) 2 (If Equipped)
2 M12345-33 Screw, #10-24 x 1
3 M12342-3 Wheel Support Frame (110/115) 1

M12831-5 Wheel Support Frame (155/165/200) 1
4 NTC-3BZ Hex Nut, #10-24 6 or 8
5 107426-01 Wheel Kit (110/115)

113326-01 Pneumatic Wheel Kit (155/165/200)

6 M28526 Cap Nut 2
7 M51015-01 Axle (110/115) 1

M16801-5 Axle (155/165/200) 1
8 113497-01 Wheel Spacer (155/165/200 only) 2
9 113193-01 Cord Cleat Kit

(Contains 2 Wheels and Cap Nuts) 1

(Contains 2 Wheels, Cap Nuts, & Spacers) 1

(Contains 2 Cleats, 4 Nuts and 4 Bolts) 1 (If Equipped)

1

8

7

3

/4" 6 or 8

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

30

www.desatech.com 113282-01C

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 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

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.

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

STANDARD WHEELS AND HANDLE
KIT HA1206

For 40/50/55/60/70,000 Btu Models. Makes
heater even more portable and convenient. Easy
to assemble.

AIR GAUGE KIT - HA1180

For all models. Special tool to check pump
pressure.

HEAVY DUTY WHEELS AND
HANDLE KIT HA1202

For 40/50/55/60/70,000 Btu Models. For heavy
duty applications. Makes your heater even more
portable and convenient.

IGNITION CONTROL ASSEMBLY/
PHOTOCELL TESTER - HA1170

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

THERMOSTAT KIT - HA1210

Keeps your building at the temperature you select
day and night. Helps economize on fuel.

113282-01C 31

www.desatech.com

WARRANTY AND REPAIR SERVICE

LIMITED WARRANTY

DESA Heating Products warrants this product and any parts thereof, to be free from defects in materials and work­manship for one (1) year 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 Heating Products 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 Heating Products 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 Heating Products.

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:

Printed in U.S.A.

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

113282 01

NOT A UPC

113282-01
Rev. C
08/04