Page 1
PORTABLE
FORCED
AIR HEATER
OWNER’S MANUAL
Heater Sizes:
35,000, 50,000, and 55,000 Btu/Hr
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.
®
ARL LOGO
G 004
Page 2
35,000, 50,000, And 55,000 Btu/Hr H.S.I. Series
PORTABLE FORCED AIR HEATERS
SAFETY
INFORMATION
WARNINGS
WARNINGS: IMPORTANT:
Read this Owner’s Manual carefully and completely before trying to assemble, operate, or service this heater. Improper use of
this heater can cause serious injury or death from burns, fire,
explosion, electrical shock, and
carbon monoxide poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early
signs of carbon monoxide poisoning resemble the flu, with headaches, dizziness,
and/or nausea. If you have these signs, the
heater may not be working properly. Get
fresh air at once! Have heater serviced.
Some people are more affected by carbon
monoxide than others. These include pregnant women, persons with heart or lung
disease or anemia, those under the influence
of alcohol, and those at high altitudes.
Make certain you read and understand all
Warnings. Keep this manual for reference.
It is your guide to safe and proper operation
of this heater.
• Use only kerosene 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 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.
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 from heaters,
torches, welding equipment, and
similar sources of ignition (exception: the fuel reservoir integral with
the heater unit).
g)Whenever possible, fuel storage shall
be confined to areas where floor penetrations do not permit fuel to drip
onto or be ignited by a fire at lower
elevation.
h)Fuel storage shall be in accordance
with the federal, state, or local authority having 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
minimum safe distance is 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.
• Use only in well-vented areas. Before
using heater, provide at least a threesquare-foot opening of fresh, outside
air for each 100,000 Btu/Hr of rating.
This heater produces carbon monoxide,
which is listed by the State of California as a reproductive toxin under Proposition 65.
• 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.
UNPACKING
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.
2
102388
Page 3
OWNER’S MANUAL
PRODUCT IDENTIFICATION
Hot Air Outlet
Lower Shell
Fuel Tank
Side Cover
Ignition Control Assembly
(assembly on inside of side cover)
Power Cord
Figure 1 - 55,000 Btu/Hr Model Shown
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
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.
Combustion Chamber
Ignitor
Clean
Heated
Air Out
The Ignition System: The ignition con-
trol 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.
Handle
Motor
Fan
Upper Shell
Fan Guard
Air Pump
Air Filter
End Cover
Fuel Cap
Air Intake
Filter
Cool
Air In
Air
Output
Filter
FUELS
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
• the need of nontoxic 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 ignition control assembly
to shut down the heater. Foreign matter may
also require you to clean fuel system often.
VENTILATION
WARNING: 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 two-square-foot opening
of fresh, outside air for each 55,000 Btu/Hr
rating. Provide extra fresh air if more heaters are being used.
Example:
one of the following:
• a two-car garage door (16-feet-wide
opening) raised 1 1/2 inches
• a single-car garage door (9-feet-wide
opening) raised 2 1/2 inches
• two windows (30-inches-wide opening)
raised 4 1/2 inches
A 55,000 Btu/Hr heater requires
Fuel
Tank
Figure 2 - Cross Section Operational View
102388
Nozzle
Air For Fuel
System
Fuel
Filter
Air Line
To Burner
Air For Combustion
And Heating
Ignition
Control
Assembly
Fuel
3
Page 4
35,000, 50,000, And 55,000 Btu/Hr H.S.I. Series
PORTABLE FORCED AIR HEATERS
OPERATION
WARNING: Review and un-
derstand the warnings in the
Safety Information
2. 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 threeprong, grounded extension cord. Extension cord must be at least six feet long.
Section, page
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
5. Plug extension cord into standard 120
volt/60 hertz, three-hole, grounded outlet.
Note:
Ignitor will preheat for five
seconds then heater will start.
TO STOP HEATER
Unplug extension cord from outlet.
TO RESTART HEATER
1. Unplug extension cord from outlet and
wait 10 seconds (two minutes if heater
has been running).
2. Plug extension cord into standard 120
volt/60 hertz, three hole, grounded outlet.
Note:
Ignitor will preheat for five
seconds then heater will start.
STORING,
TRANSPORTING,
OR SHIPPING
Note:
If shipping, transport companies re-
quire fuel tanks to be empty.
1. Drain fuel tank. Drain fuel through fuel
cap opening. Be sure all fuel is removed.
2. 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.
3. Replace fuel cap. Properly dispose of old
and dirty fuel. Check with local automotive service stations that recycle oil.
4. If storing, store heater in dry place.
Make sure storage place is free of dust
and corrosive fumes.
IMPORTANT:
summer months for use during next heating
season. Using old fuel could damage heater.
Do not store kerosene over
PREVENTATIVE
MAINTENANCE
SCHEDULE
Item
Fuel tank
Air output and lint filters
Air intake filter
Fuel filter
Ignitor
Fan blades
Motor
WARNING: Never service
heater while it is plugged in, operating, or hot. Severe burns and
electrical shock can occur.
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 replace as needed.
Clean twice a heating season or replace as
needed.
No maintenance required.
Clean each season or as needed.
Not required/permanently lubricated.
How To
See Storing, Transporting, or Shipping,
above.
See Air Output, Air Intake, and Lint Filters,
page 6.
See Air Output, Air Intake, and Lint Filters,
page 6.
See Fuel Filter, page 7.
See Fan, page 6.
4
102388
Page 5
OWNER’S MANUAL
TROUBLESHOOTING
FAULT CONDITION
Motor does not start five seconds after heater
is plugged in.
Motor starts and runs but heater does not
ignite.
WARNING: Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
POSSIBLE CAUSE
1. No power to heater
WARNING: High voltage!
2. Bad electrical connection between motor and ignition control assembly or ignition assembly and power cord
3. Binding pump rotor
4. Defective ignition control assembly
5. 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. Check all electrical connections. See
Wiring Diagrams, page 10.
3. If fan does not turn freely, see Pump Ro-
tor, page 8.
4. Replace ignition control assembly.
5. Replace motor.
1. Fill tank with kerosene.
2. See Pump Pressure Adjustment, page 6.
3. See Fuel Filter, page 7.
4. See Nozzle, page 8.
5. Drain and flush fuel tank with clean
kerosene. See Storing, T ransporting, or
Shipping, page 4.
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
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 Wir-
ing Diagrams, page 10.
7. Replace ignitor, see page 7.
8. Replace ignition control assembly.
1. See Pump Pressure Adjustment, page 6.
2. See Air Output, Air Intake, and Lint Fil-
ters, page 6.
3. See Fuel Filter, page 7.
4. See Nozzle, page 8.
5. Make sure photocell boot is properly
seated in bracket.
6. Clean photocell lens.
7. Check electrical connections. See Wir-
ing Diagrams, page 10.
8. Replace photocell.
9. Replace ignition control assembly.
102388
5
Page 6
35,000, 50,000, And 55,000 Btu/Hr H.S.I. Series
PORTABLE FORCED AIR HEATERS
SERVICE
PROCEDURES
WARNING: Never service
heater while it is plugged in, operating, or hot. Severe burns and
electrical shock can occur.
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.
Upper Shell
Fan
Guard
Figure 3 - Upper Shell Removal
FAN
IMPORTANT:
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 setscrew which holds fan to motor shaft.
3. Slip fan off motor shaft.
4. Clean fan using 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 4).
7. Place setscrew on flat of shaft.
Tighten setscrew firmly (40-50
inch-pounds).
8. Replace fan guard and upper shell.
Remove fan from motor
Fan
Motor
Flush
Motor
Shaft
Setscrew
Figure 4 - Fan Cross Section
AIR OUTPUT, AIR INTAKE,
AND LINT FILTERS
1. Remove upper shell (see Upper Shell
Removal).
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 4).
6. Replace filter end cover.
7. Replace fan guard and upper shell.
IMPORTANT:
Lint Filter
Air Output Filter
Figure 5 - Air Output, Air Intake, and Lint
Filters
Do not oil filters.
Air Intake Filter
Filter End Cover
Fan Guard
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 4). Allow motor to reach full speed.
4. Using a flat blade screwdriver, adjust
pressure. Turn relief valve to right to
increase the pressure. Turn relief valve
to left to decrease the pressure. Set
pump pressure as follows:
35 Model: 3.0 psi
50 Model: 3.6 psi
55 Model: 3.6 psi
5. Remove pressure gauge. Replace pressure gauge plug in filter end cover.
Pressure
Gauge
Plug
Figure 6 - Pressure Gauge Plug Removal
Pressure
Gauge
Figure 7 - Adjusting Pump Pressure
Relief Valve
6
102388
Page 7
OWNER’S MANUAL
SERVICE
PROCEDURES
Continued
FUEL FILTER
1. Remove 4 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. W ash fuel filter with clean fuel and replace in tank.
6. Attach upper fuel line to fuel filter neck.
7. Replace side cover.
Fuel Filter
IGNITOR
1. Remove upper shell and fan guard (see
page 6).
2. Remove fan (see page 6).
3. Remove 4 side cover screws with a
5/16" nut driver. Remove side cover
(see Figure 8).
4. Disconnect ignitor wires (gray) from
ignition control assembly (see Figure
9). 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 9).
6. Remove combustion chamber. Stand
combustion chamber on end with nozzle
adapter bracket on top (see Figure 10).
7. Remove ignitor screw with a 1/4" nut
driver. Carefully remove ignitor from
nozzle adapter bracket.
CAUTION: Do not bend or strike
ignitor element. Handle with care.
Combustion
Chamber
Air Line
Hose
Fuel
Line
Hose
Photocell
Bracket
Photocell
Assembly
Side Cover
Figure 9 - Disconnecting Ignitor Wires
from Ignition Control Assembly
Nozzle
Adapter
Bracket
Ignitor
Ignitor
Wires
(Gray)
Ignition
Control
Assembly
Ignitor
Screw
Ignitor
Side Cover
Figure 8 - Fuel Filter Removal
Upper Fuel Line
8. Carefully remove replacement ignitor
from styrofoam packing.
9. Carefully guide ignitor into opening in
nozzle adapter bracket. Do not strike
ignitor element. Attach ignitor to nozzle
adapter bracket with screw using a 1/4"
nut driver (see Figure 10). T orque 10 to
20 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 Wiring Diagrams, page
10, for correct terminal locations.
12. Replace side cover (see Figure 8).
13. Connect and route fuel line hose and
air line hose to nozzle adapter (see Figure 9).
14. Replace photocell in photocell bracket.
Route wires as shown in Figure 11,
page 8.
15. Replace fan (see page 6).
16. Replace fan guard and upper shell (see
page 6).
Ignitor
Photocell
Bracket
Combustion
Chamber
Figure 10 - Ignitor Replacement
Element
Nozzle Adapter
Bracket Opening
Nozzle
Adapter
Bracket
102388
Continued
7
Page 8
35,000, 50,000, And 55,000 Btu/Hr H.S.I. Series
PORTABLE FORCED AIR HEATERS
SERVICE
PROCEDURES
Continued
NOZZLE
1. Remove upper shell (see page 6).
2. Remove fan (see page 6).
3. Remove fuel and air line hoses from
nozzle assembly (see Figure 11).
4. Turn nozzle adapter 1/4 turn to left and
pull toward motor to remove (see Figure 13).
5. Place nozzle adapter into vise and
lightly tighten.
6. Carefully unscrew nozzle from the
nozzle adapter using 5/8" socket
wrench (see Figure 14).
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 inchpounds).
10. Attach nozzle assembly to burner strap.
11. Attach and route fuel and airline hoses
to nozzle assembly as shown (see Figure 11). Route photocell wires as shown
in Figure 11.
12. Replace fan (see page 6).
13. Replace fan guard and upper shell (see
page 6).
Combustion
Chamber
Nozzle/
Adapter
Assembly
Photocell
Wires
Air Line Hose
Fuel Line
Hose
Figure 11 - Removing Air and Fuel Line
Hoses
Combustion
Chamber
Nozzle
Adaptor
Bracket
Figure 12 - Removing Nozzle Assembly
Nozzle
Adapter
PUMP ROTOR
(Procedure if Rotor is Binding)
1. Remove upper shell (see page 6).
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 15).
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 Pump Pres-
sure Adjustment, page 6).
Note:
If rotor is still binding, proceed
as follows.
13. Perform steps 1 through 6 above.
14. Place fine grade sandpaper (600 grit) on
flat surface. Sand rotor lightly in “figure
8” motion four times (see Figure 16).
15. Reinstall insert and rotor.
16. Perform steps 10 through 12 above.
Nozzle Face
Nozzle Seal
Nozzle
Nozzle Adapter
Air Line
Fitting
Fuel Line Fitting
Figure 13 - Nozzle and Nozzle Adapter
Blade
Pump Plate
Air Intake Filter
Filter End
Cover
Insert
Figure 14 - Rotor Location
Gap Adjusting
Screw
Figure 15 - Gap Adjusting Screw Locations
Figure 16 - Sanding Rotor
Rotor
Air Output
Filter
Fan Guard
Gap Adjusting Screw
.003"/.004"
Gap
Measured
With
Feeler
Gauge
Rotor
Blade
Sandpaper
8
102388
Page 9
OWNER’S MANUAL
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 (All Models)
Amperage (Normal Run) 2.0 2.0 2.0
Motor Speed (RPM) 1725 1725 1725
Motor Horsepower (hp) 1/15 1/15 1/15
Hot Air Output (CFM) 165 175 175
Pump Pressure (psi) 3.0 3.6 3.6
Shipping Weight
(Approximate Pounds) 32 33 33
Heater Weight without Fuel
(Approximate Pounds) 28 29 29
MAINTENANCE
KITS
Btu/Hr 35,000 50,000 55,000
Ignition Control Assembly Part No. 104068-01 104068-01 104068-01
or or or
104068-03 104068-03 104068-03
Ignitor Kit Part No. 102548-01 102548-01 102548-01
Filter Kit Part No. HA3014 HA3014 HA3014
Nozzle Kit Part No. HA3006 100735-17 100735-17
Rotor/Air Pump Kit Part No. HA3004 HA3005 HA3005
Photocell Part No. M16656-23 M16656-23 M16656-23
Pump Adjustment Part No. HA3020 HA3020 HA3020
TECHNICAL
SERVICE
You may have further questions about operation or troubleshooting. If so, contact
DESA International’s Technical Service
Dept. at 1-800-323-5190.
REPLACEMENT
PARTS
Note:
Use only original replacement parts.
This will protect your warranty coverage for
parts replaced under warranty.
PARTS UNDER WARRANTY
Contact authorized dealers of this product.
If they can’t supply original replacement
part(s), call DESA International’s Technical Service Dept. at 1-800-323-5190.
When calling 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 defec-
tive part to the factory.
PARTS NOT UNDER
WARRANTY
Contact authorized dealers of this product.
If they can’t supply original replacement
part(s), call DESA International’s Parts Dept.
at 1-800-972-7879 for referral information.
When calling DESA International, have
ready
• model number of your heater
• the replacement part number
102388
9
Page 10
35,000, 50,000, And 55,000 Btu/Hr H.S.I. Series
PORTABLE FORCED AIR HEATERS
WIRING DIAGRAMS
Ignitor
Gray
Red
Motor
Gray
Red
Gray
Green
White
Blue
Blue
Black
Power Plug
120V/60Hz
Green
Photocell
White
Figure 17 - Wiring Diagram For Heaters Using 102350-01 Ignition Control Assembly
Ignitor
Gray
IGNITOR
L1 (120V)
MOTOR MAIN
IGNITOR
Ignition Control
Assembly
MOTOR RETURN
PHOTOCELL
PHOTOCELL
L2 AC NEUTRAL
PART# 102350
IGNITOR
MOTOR MAIN
Green
Power Plug
120V/60Hz
Green
Figure 18 - Wiring Diagram For Heaters Using 104040-02 Ignition Control Assembly
Black
White
Photocell
Motor
White
Blue
Blue
Ignition Control
Assembly
120V (L1)
AC NEUTRAL (L2)
MOTOR RETURN
IGNITOR
PHOTOCELL
PHOTOCELL
104040
10
102388
Page 11
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 Authorized Service
Center booklet supplied with heater.
DESA International
P.O. Box 90004
Bowling Green, KY
42102-9004
1-800-972-7879
Parts Department
OWNER’S MANUAL
THERMOSTAT KIT - HA1210
Keeps your building at the temperature you
select day and night. Helps economize on fuel.
AIR GAUGE KIT - HA1180
Special tool to check pump pressure.
A 008
IGNITION CONTROL
ASSEMBLY/PHOTOCELL
TESTER - HA1170
Special tool used to test the ignition control
assembly and photocell.
HEAVY DUTY WHEELS AND
HANDLE KIT - HA1202
For heavy duty applications. Makes your
heater even more portable and convenient.
STANDARD WHEELS AND
HANDLE KIT - HA1206
Makes heater even more portable and convenient. Easy to assemble.
102388
11
Page 12
35,000, 50,000, And 55,000 Btu/Hr H.S.I. Series
PORTABLE FORCED AIR HEATERS
ILLUSTRATED
PARTS
BREAKDOWN
REM35B
R35D
B50H
REM50C
R55A
REM55A
4
5
36
3
9
7
8
22
6
21
10
20
28
1
2
9-1
9-5
9-2
11
9-4
9-3
12
18
23
25
16
24
13
12-18
12-17
12-1
12-16
12-2
12-15
12-3
12-14
12-4
17
12-5
26
30
35
19
32
29
33
27
34
15
14
31
12-6
12-7
12-8
12-9
12-10
Motor and Pump Assembly
12-13
12-12
12
12-11
102388
Page 13
OWNER’S MANUAL
PARTS LIST
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.
REM35B, R35D, B50H, REM50C, R55A, REM55A
KEY PART
NO. NUMBER DESCRIPTION QTY.
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 098512-47 Combustion Chamber
(35 model) 1
098512-39 Combustion Chamber
(50/55 models) 1
6 M10908-2 Screw, #6-32 x 3/8" 2
7 103154-03 Photocell Bracket 1
8 M16656-23 Photocell Assembly 1
9 *** Burner Head Assembly 1
9-1 HA3006 Nozzle (35 model) 1
100735-17 Nozzle (50/55 models) 1
9-2 102548-01 Ignitor Kit 1
9-3 079980-01 Nozzle Adapter 1
9-4 102336-01 Nozzle Adapter Bracket 1
9-5 104023-01 Screw, #6-32 x 3/4" 1
10 M11084-26 Screw, #10-16 x 7/8" 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 098219-31 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" 4
KEY PART
NO. NUMBER DESCRIPTION QTY.
18 M50631 Rubber Bumper 2
19 097461-03AA Side Cover 1
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 M29652-05 Fuel Line (35 model) 1
079973-01 Fuel Line (50/55 models) 1
29 M50876-04 Fuel Filter (35 model) 1
M50876-02 Fuel Filter (50 model) 1
M50876-05 Fuel Filter (55 model) 1
30 M10990-3 Rubber Bushing 1
31 101695-01 Button Plug 1
32 102349-01 PCB Support 5
33 104068-03 Ignition Control Assembly 1
34 097702-01 Fuel Cap (Includes Gasket) 1
35 098513-23 Fuel Tank (35 model) 1
098513-27 Fuel Tank (B50H model) 1
098513-20 Fuel Tank (REM50C model) 1
098513-24 Fuel Tank (55 model) 1
36 M51108-01 Shell Heat-Shield 1
PARTS AVAILABLE - NOT SHOWN
097204-01 Tradename Decal (R35D) 2
097204-08 Tradename Decal (R55A) 2
097764-01 Tradename Decal (REM35B) 2
097764-02 Tradename Decal (REM50C) 2
097764-05 Tradename Decal (REM55A) 2
097646-01 Tradename Decal (B50H) 2
098493-01 General Information Decal 1
103814-01 Wire Tie 1
OPTIONAL ACCESSORIES
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
HA3004 Rotor Kit (M22456-1, M22009,
M8643) 35 model
HA3005 Rotor Kit (M22456-2, M22009,
M8643-2) 50/55 models
HA3014 Filter Kit (M29632, M29633,
M29612-01)
HA3020 Pump Kit (M27694, M10993-1,
M22997, M8940)
** See OPTIONAL ACCESSORIES *** Not available as an assembly.
102388
13
Page 14
WARRANTY AND REPAIR SERVICE
KEEP THIS WARRANTY
Model No.
Serial No.
Date of Purchase
(To be filled in by purchaser)
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 purchase when operated and maintained in accordance with instructions. This warranty is extended only to the original retail
purchaser, when proof of purchase is provided.
This warranty covers only the cost of parts and labor required to restore the product to proper operating condition. Transportation and incidental
costs associated with warranty repairs are not reimbursable under this warranty.
Warranty service is available only through authorized dealers and service centers.
This warranty does not cover defects resulting from misuse, abuse, negligence, accidents, lack of proper maintenance, normal wear, alteration,
modification, tampering, contaminated fuels, repair using improper parts, or repair by anyone other than an authorized dealer or service center.
Routine maintenance is the responsibility of the owner.
THIS EXPRESS WARRANTY IS GIVEN IN LIEU OF ANY OTHER WARRANTY EITHER EXPRESSED OR IMPLIED, INCLUDING
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
DESA International assumes no responsibility for indirect, incidental or consequential damages. Some states do not allow the exclusion or
limitation of incidental or consequential damages or limitations or exclusions may not apply to you. This Limited Warranty gives you specific
legal rights and you may also have other rights which vary from state to state.
WARRANTY SERVICE
Should your heater require service, return it to your nearest authorized service center. Proof of purchase must be presented with the heater. The heater
will be inspected. A defect may be caused by faulty materials or workmanship. If so, DESA International will repair or replace the heater without
charge.
REPAIR SERVICE
Return the heater to your nearest authorized service center. Each Service Center is independently owned and operated. Repairs not covered by the
warranty will be billed at standard prices. We reserve the right to amend these specifications at any time without notice.
Illustrated parts lists can be obtained free of charge. Send a self addressed stamped envelope to the address listed below. List the heater model number
and the date located in the lower right corner of this page. A service manual may be purchased from the address listed below. Send a check for $5.00
payable to DESA International. When writing for information regarding your heater, be sure to include the model number and serial number as shown
on the model plate.
For information about this warranty write:
Corporate Headquarters
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
102388 01
NOT A UPC
102388-01
Rev. N
11/98
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