Desa PORTABLE FORCED AIR HEATERS User manual

ARL LOGO G 004
®
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.
PORTABLE
FORCED
AIR HEATERS
OWNER’SMANUAL
Heater Sizes:
35,000 50,000 55,000 Btu/Hr

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102437
Safety Information.........................................................................2
Product Identification .................................................................... 4
Unpacking .....................................................................................4
Theory of Operation ......................................................................4
Fuels ..............................................................................................5
Ventilation .....................................................................................5
Operation .......................................................................................5
Storing, Transporting, or Shipping ................................................6
Preventative Maintenance Schedule ............................................. 6
Troubleshooting.............................................................................7
Service Procedures ........................................................................ 8
Upper Shell Removal..............................................................8
Fan........................................................................................... 8
Air Output, Air Intake, and Lint Filters..................................8
Pump Pressure Adjustment..................................................... 9
Fuel Filter................................................................................ 9
Spark Plug............................................................................... 9
Nozzle .....................................................................................10
Pump Rotor ............................................................................. 11
Wiring Diagram............................................................................. 11
Specifications................................................................................. 12
Technical Service .......................................................................... 12
Replacement Parts ......................................................................... 12
Maintenance Kits...........................................................................13
Accessories ....................................................................................13
Illustrated Parts List ...................................................................... 14
Warranty and Repair Service ........................................................Back Cover
CONTENTS SECTION PAGE
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.
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.
WARNINGS
SAFETY
INFORMATION
DANGER
Carbon monoxide poisoning may lead to death!

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SAFETY
INFORMATION
Continued
WARNINGS (Continued)
• Use only kerosene or No. 1 fuel oil 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 federal, state, and local regula-
tions 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.
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 struc-
ture.
f) All fuel storage shall be located a minimum of 25 feet from heaters, torches,
welding equipment, and similar sources of ignition (exception: the fuel reservoir
integral with the heater unit).
g) Whenever possible, fuel storage shall be confined to areas where floor penetra-
tions 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 federal, state, or local authority hav-
ing jurisdiction.
• Never use heater where gasoline, paint thinner, or other highly flammable vapors are
present.
• Follow all local ordinances and codes when using heater.
• Heaters used in the vicinity of tarpaulins, canvas, or similar enclosure materials
shall be located a safe distance from such materials. The recommended mini-
mum safe distance is 10 feet. It is further recommended that these enclosure
materials be of a fire retardant nature. These enclosure materials shall be se-
curely fastened to prevent them from igniting or from upsetting the heater due to
wind action.
• Use only in well-vented areas. Before using heater, provide at least a three-square-
foot opening of fresh, outside air for each 100,000 Btu/Hr of rating. This heater
producescarbonmonoxide,whichislistedbytheStateofCaliforniaasareproductive
toxin under Proposition 65.
• Use only in places free of flammable vapors or high dust content.
• Use only the electrical voltage and frequency specified on model plate.
• Use only a three-prong, grounded extension cord.
• Minimum heater clearances from combustibles:
Outlet: 8 Ft. Sides: 4 Ft. Top: 4 Ft. Rear: 4 Ft.
• Locate heater on a stable and level surface if heater is hot or running or a fire may
occur.
• When moving or storing heater, keep heater in a level position or fuel spillage may
occur.
• Keep children and animals away from heater.
• Unplug heater when not in use.
• When used with thermostat, heater may start anytime.
• Never use heater in living or sleeping areas.
• Never block air inlet (rear) or air outlet (front) of heater.
• Never move, handle, refuel, or service a hot, operating, or plugged-in heater.
• Never attach duct work to front or rear of heater.

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102437
THEORY OF
OPERATION The Fuel System: The air pump forces air through the air line. The air is then
pushed through the burner head nozzle. This air causes fuel to lift 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 electronic ignitor sends voltage to the spark plug.
The spark plug ignites the fuel and air mixture.
The Flame-Out Control System: This system causes the heater to shut down
if the flame goes out.
Fuel
Filter
Air For Fuel
System Air For Combustion And Heating Fuel
Combustion
Chamber Air
Intake
Filter
Clean
Heated
Air Out
Cool
Air
In
Air
Output
Filter
Fuel
Tank
Figure 2 - Cross Section Operational View
Burner
Head
Spark
Plug
Motor
Fan
Electronic
Ignitor
Air Line
To Burner
Nozzle
Air Pump
PRODUCT
IDENTIFICATION Lower Shell
Power Cord
Side Cover
Fuel Tank
Hot Air Outlet Upper Shell
Flame-Out Control
Reset Button
Fuel Cap
Air Filter
End Cover
Fan Guard
Handle
Figure 1
1. Remove all packing items applied to heater for shipment.
2. Remove all items from carton.
3. Check items for shipping damage. If heater is damaged, promptly inform
dealer where you bought heater.
UNPACKING

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102437
WARNING
!
Use only kerosene or No. 1 fuel oil to avoid risk of fire or
explosion. Never use gasoline, naphtha, paint thinners,
alcohol, or other highly flammable fuels.
Do not use heavy fuels such as No. 2 fuel oil or No. 2 Diesel. Using heavy fuels
will result in:
• clogged fuel filter and nozzle
• carbon build up on spark plug
• the need of non-toxic anti-icer in fuel during very cold weather
IMPORTANT: Use a KEROSENE ONLY storage container. Be sure storage
container is clean. Foreign matter such as rust, dirt, or water will cause the flame-
out control to shut down heater. Foreign matter may also require you to clean fuel
system often.
FUELS
WARNING
!
VENTILATION
Follow the minimum fresh, outside air ventilation
requirements. If proper fresh, outside air ventilation is not
provided, carbon monoxide poisoning can occur. Provide
proper fresh, outside air ventilation before running heater.
Provide at least a three-square-foot opening of fresh, outside air for each 100,000
Btu/Hr rating. Provide extra fresh air if more heaters are being used.
Example: A 55,000 Btu/Hr heater requires one of the following:
• a two-car garage door (16 feet wide opening) raised two inches
• a single-car garage door (9 feet wide opening) raised three inches
• two, windows (30 inches wide opening) raised five inches
OPERATION WARNING
!
Review and understand the warnings in the Safety Informa-
tion Section, pages 2 and 3. They are needed to safely
operate this heater. Follow all local codes when using this
heater.
To Start Heater
1. Follow all ventilation and safety information.
2. Fill fuel tank with kerosene or No. 1 fuel oil.
3. Attach fuel cap.
4. Plug power cord of heater into three-prong, grounded extension cord. Exten-
sion cord must be at least six feet long.
Extension Cord Wire Size Requirements
6 to 10 feet long, use 18 AWG rated cord
11 to 100 feet long, use 16 AWG rated cord
101 to 200 feet long, use 14 AWG rated cord
Continued

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OPERATION
Continued
Item How Often How To
Fuel tank Flush every 150-200 hours See Storing, Transporting, or
of operation or as needed. Shipping, above.
Air output and Replace every 500 hours of See Air Output, Air Intake,
lint filters operation or once a year. and Lint Filters, page 9.
Air intake Wash and dry with soap and See Air Output, Air Intake,
filter water every 500 hours of op- and Lint Filters, page 9.
eration or replace as needed.
WARNING
!
Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
STORING,
TRANSPORTING ,
OR SHIPPING
Note: If shipping, transport companies require fuel tanks to be empty.
1. Drain fuel tank.
Note: Some models have 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: Do not store kerosene over summer months for use during next
heating season. Using old fuel could damage heater.
To Stop Heater
1. Unplug extension cord from outlet.
To Restart Heater
1. Wait two minutes after stopping heater.
2. Repeat steps under To Start Heater, page 6.
Figure 3 - Flame-Out Control Reset Button
Flame-Out
Control
Reset Button
5. Plug extension cord into standard 120 volt/60 hertz, three-hole, grounded
outlet. Heater will start when extension cord is plugged into outlet. If not,
push in flame-out control reset button (see Figure 3).
PREVENTATIVE
MAINTENANCE
SCHEDULE

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Fuel filter Clean twice a heating season See Fuel Filter, page 10.
or replace as needed.
Spark plug Clean and regap every 600 See Spark Plug, pages 10
hours operation or replace and 11.
as needed.
Fan blades Clean each season or as needed. See Fan, page 9.
Motor Not required/permanently lubricated
PREVENTATIVE
MAINTENANCE
SCHEDULE
Continued
Wrong pump pressure
Dirty air output, air intake
and lint filters
Dirty fuel filter
Dirt in nozzle
Dirty photocell lens
Bad flame-out control
Heater ignites, but
flame-out control
shuts off heater after
a short period of
time.
WARNING
!
TROUBLE-
SHOOTING Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
See Pump Pressure
Adjustment, page 10.
See Air Output, Air Intake
and Lint Filters, page 9.
See Fuel Filter, page 10.
See Nozzle, page 11.
Clean photocell lens.
Replace flame-out control.
OBSERVED FAULT POSSIBLE CAUSE REMEDY
Heater will not
ignite, but motor runs
for a short period of
time.
Wrong pump pressure
Carbon deposits on spark
plug and/or improper gap
Dirty fuel filter
Dirt in nozzle
Water in fuel tank
Electronic ignitor not
grounded
Bad electronic ignitor
See Pump Pressure
Adjustment, page 10.
See Spark Plug, pages 10
and 11.
See Fuel Filter, page 10.
See Nozzle, page 11.
Drain and flush fuel
tank with clean kerosene.
See Storing, Transporting,
or Shipping, page 7.
Make sure electronic ig-
nitor mounting is tight.
Replace electronic ignitor.
WARNING: High voltage!
!
Motor does not start
when heater is plugged
in, fan rotates slowly
or does not turn.
Flame-out control not reset
Binding pump rotor
Press flame-out control
reset button.
If fan is hard to turn, see
Pump Rotor, page 12.

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SERVICE
PROCEDURES WARNING
!
Upper Shell Removal
1. Remove screws along each side of
heater using 5/16" nut-driver. These
screws attach upper and lower
shells together.
2. Lift upper shell off.
3. Remove fan guard.
Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
Air Output, Air Intake, and
Lint Filters
1. Remove upper shell (see above).
2. Remove filter end cover screws
using 5/16" nut-driver.
3. Remove filter end cover.
4. Replace air output and lint filters.
5. Wash or replace air intake filter
(see Preventative Maintenance
Schedule, page 7).
6. Replace filter end cover.
7. Replace fan guard and upper shell.
IMPORTANT: Do not oil filters.
Fan
Guard
Upper
Shell
Figure 4 - Upper Shell Removal
Fan
Setscrew
Motor
Shaft
Motor
Figure 6 - Air Output, Air Intake, and Lint Filters
Fan
IMPORTANT: Remove fan from motor
shaft before removing motor from
heater. The weight of the motor
resting on the fan could damage the
fan pitch.
1. Remove upper shell (see above).
2. Use 1/8" allen wrench to loosen
set-screw which holds fan to motor
shaft.
3. Slip fan off motor shaft.
4. Clean fan using soft cloth mois-
tened 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 5).
7. Place setscrew on flat of shaft.
Tighten setscrew firmly (40-50
inch-pounds).
8. Replace fan guard and upper shell.
Figure 5 - Fan Cross Section
Fan Guard
Filter End Cover
Air Intake Filter
Lint Filter
Air Output Filter
Flush

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102437
Pump Pressure
Adjustment
1. Remove pressure gauge plug from
filter end cover.
2. Install accessory pressure gauge
(part number HA1180).
3. Start heater (see Operation, page
6). 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 at right
for correct pressure for each model.
5. Remove pressure gauge. Replace
pressure gauge plug in filter end
cover.
Relief
Valve
Pressure
Gauge
Plug
Figure 7 - Pressure Gauge Plug Removal
Pump
Model Pressure
35,000 Btu/Hr 3.0 PSI
50,000 Btu/Hr 3.4 PSI
55,000 Btu/Hr 3.4 PSI
Pressure
Gauge
Figure 8 - Adjusting Pump Pressure
Fuel Filter
1. Remove side cover screws using
5/16" nut-driver.
2. Remove side cover.
3. Pull upper fuel line off fuel filter
neck.
4. Carefully pry bushing and fuel
filter out of fuel tank.
5. Wash fuel filter with clean fuel and
replace in tank.
6. Attach upper fuel line to fuel filter
neck.
7. Replace side cover.
Air Line
Hose
Burner
Strap Spark Plug
Wire
Nozzle Assembly
Fuel Line Hose
Spark
Plug
Spark Plug
Mounting Nut
Combustion
Chamber
Bend Here
to Adjust
Gap
.055" Gap
Continued
Figure 10 - Spark Plug Removal
Figure 11 - Spark Plug Gap
Spark Plug
1. Remove upper shell (see page 9).
2. Remove fan (see page 9).
3. Remove fuel and air line hoses
from nozzle assembly.
4. Remove spark plug wire from
spark plug.
5. Remove two screws using 5/16"
nut-driver and remove burner
strap.
6. Place hex-body of spark plug into
vise and tighten.
7. Remove spark plug mounting nut
using 11/16" open-end wrench.
8. Remove burner strap from spark
plug.
9. Clean and regap spark plug
electrodes to .055" gap.
10.Replace burner strap onto spark
plug. Rotate burner strap to
position spark plug electrodes (see
Figure 12, page 11).
Figure 9 - Fuel Filter Removal
Side Cover
Fuel Filter
Upper Fuel Line

10
102437
11.Tighten spark plug with spark plug
mounting nut.
12.Release hex-body of spark plug
from vise.
13.Replace burner strap onto combus-
tion chamber.
14.Attach spark plug wire to spark
plug.
15.Attach fuel and air line hoses to
nozzle assembly.
16.Replace fan (see page 9).
17.Replace fan guard and upper shell.
45°Burner
Strap
Figure 12- Spark Plug Rotation
Figure 13 - Removing Air and Fuel Line Hoses
Fuel Line Hose
Nozzle
Assembly
Combustion
Chamber
Air Line Hose
Nozzle
Assembly
Burner
Strap
Figure 14 - Removing Nozzle Assembly
Nozzle
Nozzle
Face
Nozzle
Adapter
Air Line
Fitting
Fuel Line
Fitting
Nozzle
Seal
Figure 15 - Nozzle and Nozzle Adapter
Nozzle
1. Remove upper shell (see page 9).
2. Remove fan (see page 9).
3. Remove fuel and air line hoses
from nozzle assembly.
4. Turn nozzle assembly 1/4 turn to
left and pull toward motor to
remove.
5. Place plastic hex-body into vise
and lightly tighten.
6. Carefully remove nozzle from the
nozzle adapter using 5/8" socket
wrench.
7. Blow compressed air through face
of nozzle. This will free any dirt in
nozzle area.
8. Inspect nozzle seal for damage.
9. Replace nozzle into nozzle adapter
until nozzle seats. Tighten 1/3 turn
more using 5/8" socket wrench
(40-45 inch-pounds).
10.Attach nozzle assembly to burner
strap.
11.Attach fuel and airline hoses to
nozzle assembly.
12.Replace fan (see page 9).
13.Replace fan guard and upper shell.

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102437
50 ROTOR PFA/P 056
Pump Rotor
(Procedure if rotor is binding)
1. Remove upper shell (see page
9).
2. Remove filter end cover
screws using 5/16" nut-driver.
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.
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
.003"/.004" if needed (see
Figure 17).
Note: Rotate rotor one full turn
to insure the gap is .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.
12.Adjust pump pressure (see
page 10).
Note: If rotor is still binding, pro-
ceed as follows.
13.Perform steps 1 through 6 (see
above).
14.Place fine grade sandpaper
(600 grit) on flat surface. Sand
rotor lightly in “figure 8” mo-
tionfourtimes(seeFigure18).
15.Reinstall insert and rotor.
16.Perform steps 10 through 12
above.
Figure 18 - Sanding Rotor
Sandpaper
Figure 17 - Gap Adjusting Screw Locations
Gap Adjusting Screw
Blade
Gap Adjusting Screw
.003"/.004" Gap
Measured With
Feeler Gauge
Rotor
Blade
Pump Plate
Filter End Cover
Air Intake Filter
Fan Guard
Air Output Filter
Insert
Rotor
Figure 16 - Rotor Location
White
Black
Blue
Green
Power Plug
120V/60Hz
Photocell
Spark Plug
Ignitor Flame-
Out
Control
B
Reset
Button
R
Red
Blue
White
White
White
White
Red
Red
Green Green/
Yellow Terminal
Board
Motor
Figure 19 - Wiring Diagram
WIRING
DIAGRAM

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TECHNICAL
SERVICE
You may have further questions about installation, operation, or troubleshooting.
If so, contact DESA International’s Technical Service Department at 1-800-323-
5190.
Note: Use only original replacement parts. This will protect your warranty coverage
for parts replaced under warranty.
Parts Under Warranty
Contact authorized dealer from whom you purchased this product. If they cannot
supply original replacement part(s), call DESA International’s Technical Service
Department at 1-800-323-5190 for referral information.
When contacting your dealer or DESA International, have ready:
• your name
• your address
• model number of your heater
• how heater was malfunctioning
• purchase date
Usually, we will ask you to return the defective part to the factory.
Parts Not Under Warranty
Contact authorized dealers of this product. If they cannot supply original replace-
ment part(s), call DESA International’s Parts Department at 1-800-972-7879 for
referral information.
When calling DESA International, have ready:
• model number of your heater
• the replacement part number
REPLACEMENT
PARTS
SPECIFICATIONS Output Rating
(Btu/Hr.) 35,000 50,000 55,000
Fuel Use Only Kerosene or No. 1 Fuel Oil
Fuel Tank Capacity (U.S. Gal.) 3.0 4.0 5.0
Fuel Consumption (Gal. Per Hr.) .26 .40 .40
Electric Requirements 120 V/60 Hz (Same All Models)
Amperage
(Normal Run) 2.0 2.0 2.0
Hot Air Output (CFM) 165 175 175
Motor RPM 1725 1725 1725
Motor HP 1/15 1/15 1/15
Shipping Weight
(Approximate Pounds) 34 35 36
Heater Weight without Fuel
(Approximate Pounds) 29 30 31

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MAINTENANCE
KITS Btu/Hr 35,000 50,000 55,000
Flame-Out Control Part No. HA3003 HA3003 HA3003
Spark Plug Part No. HA3013 HA3013 HA3013
Filter Kit Part No. HA3014 HA3014 HA3014
Nozzle Kit Part No. HA3006 HA3021 HA3021
Rotor/Air Pump Kit Part No. HA3004 HA3005 HA3005
Photocell Part No. HA3019 HA3019 HA3019
Pump Adjustment Part No. HA3020 HA3020 HA3020
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
Central or DESA International
for referral information. Parts
Centrals are listed in the Autho-
rized Service Center booklet
supplied with heater.
DESA International
P.O. Box 90004
Bowling Green, KY
42102-9004
1-800-972-7879
Parts Department
AIR GAUGE KIT - HA1180
Special tool to check pump
pressure.
A 008
HEAVY DUTY
WHEELS AND
HANDLE KIT - HA1202
For heavy duty applica-
tions. Makes your heater
even more portable and
convenient.
Makes heater even more
portable and convenient. Easy
to assemble.
STANDARD WHEELS AND
HANDLE KIT - HA1206
THERMOSTAT
KIT - HA1210
Keeps your building at
the temperature you
select day and night.
Helps economize on
fuel.
FLAME-OUT CONTROL/PHOTOCELL
TESTER - HA1170
Special tool used to test the flame-out
control and photocell.

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ILLUSTRATED
PARTS
BREAKDOWN
Motor and Pump Assembly 12-11
12-18
12-17
12-16
12-15
12-14
12-1312-12
12-10
12-1
12-2
12-3 12-4 12-5 12-6
12-7
12-8
12-9
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
9-1 9-2
9-3
9-4
9-5
17
18
19
20
21
22
23
24
25
26
27
30
31
32 33
36
37
38
39
28
29
34 35
40

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102437
20 101205-01 Motor Bracket 1
21 M30865-02 Bushing 2
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 098511-18 Lower Shell (white) 1
098511-12 Lower Shell (yellow) 1
098511-81 Lower Shell (black) 1
27 M29652-04 Rubber Airline 1
28 102482-01 Ignitor Kit 1
29 M11084-29 Screw, #10-16 x 3/4" 2
30 M29652-05 Fuel Line (35 model) 1
079973-01 Fuel Line (50/55 models) 1
31 M50876-04 Fuel Filter (35 model) 1
M50876-02 Fuel Filter (50 model) 1
M50876-05 Fuel Filter (55 model) 1
32 M10990-3 Rubber Bushing 1
33 M16841-57 Wire Assembly (Red, 6") 1
34 099125-02 Terminal Board 1
35 099157-01 Rivet 1
36 HA3003 Flame-Out Control 1
37 097702-01 Fuel Cap (Includes Gasket) 1
38 098513-23 Fuel Tank (35 model) 1
098513-27 Fuel Tank (50 model) 1
098513-24 Fuel Tank (55 model) 1
39 M51108-01 Shell Heat-Shield 1
40 099177-01 Hex Nut 1
097204-01 Tradename Decal (R35B) 2
097204-08 Tradename Decal (R55) 2
097764-01 Tradename Decal (REM35A) 2
097764-02 Tradename Decal (REM50B) 2
097764-05 Tradename Decal (REM55) 2
097646-01 Tradename Decal (B50G) 2
098493-01 General Information Decal 1
M9900-192 Combustion Chamber
Grounding Wire 1
HA1210 Hang-up Thermostat
HA1202 Heavy Duty Wheels and Handle Kit
HA1206 Standard Wheels and Handle Kit
HA1180 Air Gauge Kit
HA2210 Fuel Tank Filter Screen
HA3005 Rotor Kit (M22456-2, M22009,
M8643-2)
HA3014 Filter Kit (M29623, M29633,
M29612-01)
HA3020 Pump Kit (M27694, M10993-1,
M22997, M8940)
1 M51104-01 Handle 1
2 098511-36 Upper Shell (white) 1
098511-54 Upper Shell (yellow) 1
098511-67 Upper Shell (black) 1
3 M11084-29 Screw, #10-16 x 3/4" 2
4 100647-01 Screw, #10-16 x 1/2" 6
5 098512-40 Combustion Chamber
(35 model) 1
098512-32 Combustion Chamber
(50/55 models) 1
6 M10908-2 Screw, #6-32 x 3/8" 2
7 M16660 Photocell Bracket 1
8 HA3019 Photocell Assembly 1
9 *** Burner Head Assembly 1
9-1 HA3006 Nozzle (35 model) 1
HA3021 Nozzle (50/55 models) 1
9-2 HA3013 Spark Plug 1
9-3 079980-01 Nozzle Adapter 1
9-4 097124-01 Bracket 1
9-5 M29824 Nut, 14 mm 1
10 M11084-26 Screw, #10-16 x 3/8" 2
11 M30884 Fan 1
12 *** Motor and Pump Assembly 1
12-1 102001-01 Motor 1
12-2 079975-02 Pump Body (35 model) 1
079975-03 Pump Body (50/55 models) 1
12-3 M22009** Insert 1
12-4 M22456-1 Rotor (35 model) 1
M22456-2** Rotor (50/55 models) 1
12-5 M29608 Pump End Cover 1
12-6 M29632** Lint Filter 1
12-7 M29633** Intake Filter 1
12-8 M29609 Filter End Cover 1
12-9 M12461-31 Screw, #10-32 x 1" 3
12-10 M27694** Adjusting Screw 1
12-11 M10993-1** Pressure Relief Spring 1
12-12 M22997** Plug 1
12-13 M8940** Steel Ball, 1/4" Diameter 1
12-14 M29612-01** Output Filter 1
12-15 M12461-31 Screw, #10-32 x 1" 6
12-16 M50016 Elbow, 90°1
12-17 M8643 Blade (35 model) 4
M8643-2** Blade (50/55 models) 4
12-18 FHPF3-5C Screw, #10-32 x 5/8"
(35 model) 2
FHPF3-6C Screw, #10-32 x 3/4"
(50/55 models) 2
13 M51105-01 Fan Guard 1
14 098219-18 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" 2
18 M50631 Rubber Bumper 2
19 M50899-03AA Side Cover 1
KEY
NO. PART NUMBER DESCRIPTION QTY. KEY
NO. PART NUMBER QTY.DESCRIPTION
PARTS LIST This list contains replaceable parts used in your heater. When ordering parts,
besuretoprovidethecorrectmodelandserialnumbers(fromthemodelplate),
then the part number and description of the desired part.
PARTS AVAILABLE - NOT SHOWN
** See OPTIONAL ACCESSORIES
*** Not available as an assembly.
OPTIONAL ACCESSORIES

WARRANTY AND REPAIR SERVICE
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 workman-
ship. If so, DESA International will repair or replace the
heater without charge.
REPAIR SERVICE
Return the heater to your nearest authorized service
center. Repairs not covered by the warranty will be billed
at standard prices.
Illustrated parts lists can be obtained free of charge. Send
a self addressed stamped envelope to the address listed
below. List the heater model number and the date located
in the lower right corner of this page. A service manual
may be purchased from the address listed below. Send a
check for $5.00 payable to DESA International.
Whenwritingforinformationregardingyourheater,besure
toinclude the modelnumberandserial number as shownon
the model plate.
Each Service Center is independently owned and operated.
We reserve the right to amend these specifications at any
time without notice.
Corporate Headquarters
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
For information, write: DESA International, P.O. Box 90004
Bowling Green, Kentucky 42102-9004 ATTN: Customer Service Department
When writing, always include model number and serial number.
LIMITED WARRANTY
DESA International 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
purchasewhenoperatedandmaintainedinaccordance
withinstructions.Thiswarrantyisextendedonlytothe
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 associ-
ated 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 EX-
PRESSED OR IMPLIED, INCLUDING WARRAN-
TIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE.
DESA International assumes no responsibility for in-
direct, 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 War-
ranty gives you specific legal rights and you may also
have other rights which vary from state to state.
Model No.
Serial No.
Date of Purchase
(To be filled in by purchaser)
KEEP THIS WARRANTY
102437-01
Rev. C
01/97