PORTABLE FORCED
AIR HEATER
(WITH BUILT-IN THERMOSTAT)
OWNER’S MANUAL
Heater Sizes:
110,000, 115,000,
150,000, 155,000,
and 165,000 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.
TABLE OF CONTENTS
SAFETY INFORMATION .............................................2
UNPACKING................................................................2
PRODUCT IDENTIFICATION......................................3
ASSEMBLY..................................................................3
FUELS .........................................................................4
VENTILATION..............................................................4
THEORY OF OPERATION ..........................................4
OPERATION ................................................................4
OPERATION WITH PORTABLE GENERATOR ..........5
PREVENTATIVE MAINTENANCE SCHEDULE ..........5
TROUBLESHOOTING.................................................6
Fill In For Your Records
Model No. ___________________
(Located on side panel)
SERVICE PROCEDURES...........................................7
WIRING DIAGRAM.................................................... 11
SPECIFICATIONS ..................................................... 11
STORING, TRANSPORTING, OR SHIPPING........... 11
ILLUSTRATED PARTS BREAKDOWN .....................12
P ARTS LIST...............................................................13
REPLACEMENT PARTS ...........................................15
TECHNICAL SERVICE..............................................15
ACCESSORIES .........................................................15
WARRANTY AND REPAIR SERVICE .......................16
Serial No. ___________________
(Located on fuel tank)
®
• SAFETY INFORMATION
• UNPACKING
SAFETY
INFORMATION
WARNINGS
IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble, operate, or service this heater. Improper use of this heater can
cause serious injury or death
from burns, fire, explosion, electrical shock, and carbon monoxide poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs
of carbon monoxide poisoning resemble the
flu, with headaches, dizziness, and/or nausea. If you have these signs, the heater may
not be working properly. Get fresh air at
once! Have heater serviced. Some people
are more affected by carbon monoxide than
others. These include pregnant women, persons with heart or lung disease or anemia,
those under the influence of alcohol, and
those at high altitudes.
Make certain you read and understand all
warnings. Keep this manual for reference. It
is your guide to safe and proper operation of
this heater.
• Use only kerosene 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.
• Warning to New York City Residents
For Use Only At Construction Sites
in accordance 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 shipping damage. If
heater is damaged, promptly inform
dealer where you bought heater.
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104655
PRODUCT
IDENTIFICATION
• PRODUCT IDENTIFICATION
• ASSEMBLY
Hot Air Outlet
Lower Shell
Fuel Cap
Side Cover
Ignition Control Assembly
(assembly on inside of
side cover)
Figure 1 - Portable Forced Air Heater
Upper Shell
ASSEMBLY
These models are furnished with wheels and
a rear handle. Some models are furnished
with a front 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 wheels on axle.
IMPORTANT:
point extended hub of wheels toward
wheel support frame (see Figure 2).
2. Place cap nuts on axle ends. Gently tap
with hammer to secure.
3. Place heater on wheel support frame.
Make sure hot air outlet end (front) of
heater is over wheels. Line up holes on
fuel tank flange with holes on wheel
support frame.
4. Place rear handle (and front handle if
provided) 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.
When installing wheels,
Fan Guard
Fuel
Tank
Flange
Cap Nut
Figure 2 - Wheel and Handle Assembly
Thermostat Knob
Fuel Tank
Power Cord
Screw
Hot Air
Outlet
Axle
Nut
Wheel
Front
Handle
Rear
Handle
Air Inlet
Extended Hub
Wheel Support Frame
104655
3
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• FUELS
• VENTILATION
• THEORY OF OPERATION
• OPERATION
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 a clogged fuel filter and/or nozzle.
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 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:
one of the following:
• a two-car garage door (16 feet wide open-
• a single-car garage door (9 feet wide
• two 30 inch wide windows raised
A 165,000 Btu/Hr heater requires
ing) raised 4 inches
opening) raised 7 inches
twelve inches
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
Fuel
Tank
Figure 3 - Cross Section Operational View
Nozzle
Air For Fuel System
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 sys-
tem causes the heater to shut down if the
flame goes out.
Fuel
Filter
Air For Combustion
And Heating
OPERATION
WARNING: Review and un-
derstand the warnings in the
Safety Information
section, page
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 in-
formation.
2. Fill fuel tank with kerosene or No. 1
fuel oil.
3. Attach fuel cap.
4. Turn thermostat knob clockwise to the
HIGH position.
5. Plug power cord of heater into three-
prong, grounded extension cord. Extension cord must be at least six feet long.
Extension Cord Wire Size
Requirements
• 6 to 10 feet long, use 18 AWG rated
• 11 to 100 feet long, use 16 AWG
• 101 to 200 feet long, use 14 AWG
6. Plug extension cord into standard 120
volt/60 hertz, three-hole, grounded outlet.
seconds then heater will start.
7. Adjust thermostat knob to the desired setting.
Note:
stat setting. This thermostat is a generalheating control. It is not intended for precise
temperature control. Adjust thermostat until heater cycles at the desired setting.
Motor
Fan
Air Pump
Air Intake
Filter
Cool
Air
In
Air
Output
Filter
Air Line
To Burner
Ignition
Control
Assembly
Fuel
cord
rated cord
rated cord
Note
:
Ignitor will preheat for five
A cold heater may affect the thermo-
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104655
• OPERATION
• OPERATION WITH PORTABLE
GENERATOR
• PREVENTATIVE MAINTENANCE
SCHEDULE
OPERATION
Continued
TO STOP HEATER
Unplug extension cord from outlet.
TO RESET HEATER
1. Unplug extension cord from outlet and
wait 10 seconds (two minutes if heater
has been running).
2. Turn thermostat knob clockwise to the
HIGH position.
3. Plug extension cord into standard 120
volt/60 hertz, three-hole, grounded outlet.
Note:
Ignitor will preheat for five
seconds then heater will start.
4. Adjust thermostat knob to the desired setting.
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, pages 4 and 5, for starting, stopping, and resetting heater procedures.
Ground Lug
EL
FU
F
Copper
or Brass
Grounding
Point
Alternator
Figure 4 - Typical Generator Grounding
Method (Generator construction may vary
from that shown)
Ground Wire (#10 AWG
Stranded-Copper)
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
104655
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 an 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
5
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How To
See Storing, Transporting, or Shipping,
page 11
See Air Output, Air Intake, and Lint Filters,
page 7
See Air Output, Air Intake, and Lint Filters,
page 7
See Fuel Filter, page 8
See Fan, page 7
• TROUBLESHOOTING
TROUBLESHOOTING
Note:
For additional help, visit DESA
International’s technical service web
site at www.desatech.com.
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
2. Thermostat setting too low
REMEDY
1. Check circuit breaker in electrical panel
2. Turn thermostat knob to a higher setting
WARNING: High voltage!
3. Bad electrical connection between motor and ignition control assembly or ig-
3. Check all electrical connections. See
Wiring Diagram, page 11
nition control assembly and power cord
4. Blown fuse on ignition control assembly
5. Binding pump rotor
4. See Ignition Control Assembly, page 10
5. If fan does not turn freely, see Pump
Rotor, page 10
6. Defective ignition control assembly
7. Defective motor
1. No fuel in tank
2. Pump pressure incorrect
3. Dirty fuel filter
4. Obstruction in nozzle assembly
5. Water in fuel tank
6. Replace ignition control assembly
7. Replace motor
1. Fill tank with kerosene
2. See Pump Pressure Adjustment, page 7
3. See Fuel Filter, page 8
4. See Nozzle Assembly, page 9
5. Drain and flush fuel tank with clean
kerosene. See Storing, T ransporting, or
Shipping, page 11
Heater ignites but ignition control assembly
shuts heater off after a short period of time
WARNING: High voltage!
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 assembly
5. Photocell assembly not properly installed (not seeing the flame)
WARNING: High voltage!
6. Dirty photocell lens
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 Diagram, page 11
7. Replace ignitor, see page 8
8. Replace ignition control assembly
1. See Pump Pressure Adjustment, page 7
2. See Air Output, Air Intake, and Lint F il-
ters, page 7
3. See Fuel Filter, page 8
4. See Nozzle Assembly, page 9
5. Make sure photocell boot is properly
seated in bracket
6. Clean photocell lens
7. Check electrical connections. See Wir-
ing Diagram, page 11
8. Replace photocell
9. Replace ignition control assembly
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104655
• SERVICE PROCEDURES
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
Figure 5- 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 6).
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
Guard
Fan
Motor
Flush
Motor
Shaft
Setscrew
Figure 6 - 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 5).
6. Replace filter end cover.
7. Replace fan guard and upper shell.
IMPORTANT:
Air Intake Filter
Lint Filter
Air Output Filter
Figure 7 - Air Output, Air Intake, and Lint
Filters
Do not oil filters.
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, pages 4 and
5). 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 at 5.3 for 110,000 and 115,000
Btu/Hr models, 5.4 PSI for 150,000 and
155,000 Btu/Hr models, and 5.6 PSI for
165,000 Btu/Hr models.
5. Stop heater (see Operation, pages 4
and 5).
6. Remove pressure gauge. Replace pressure gauge plug in filter end cover.
Relief
Valve
Pressure
Gauge
Plug
Figure 8 - Pressure Gauge Plug Removal
Pressure
Gauge
Figure 9 - Adjusting Pump Pressure
104655
Continued
7
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• SERVICE PROCEDURES
SERVICE
PROCEDURES
Continued
WARNING: Never service
heater while it is plugged in, operating, or hot. Severe burns and
electrical shock can occur.
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, fuel filter, and
lower fuel line 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, Bushing,
and Lower Fuel Line
Upper
Fuel
Line
Side Cover
Figure 10 - Fuel Filter Removal
IGNITOR
1. Remove upper shell and fan guard (see
page 7).
2. Remove fan (see page 7).
3. Remove 4 side cover screws with a
5/16" nut driver. Remove side cover
(see Figure 10).
4. Disconnect ignitor wires (yellow) from
ignition control assembly (see Figure
11). 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 11).
6. Remove combustion chamber. Stand
combustion chamber on end with nozzle
adapter bracket on top (see Figure 12).
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.
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 12). Torque 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.
12. Replace side cover (see Figure 10).
13. Connect fuel line hose and air line hose to
nozzle assembly. See Fuel and Air Line
Replacement and Proper Routing, page 9.
14. Replace photocell in photocell bracket.
15. Replace fan (see page 7).
16. Replace fan guard and upper shell (see
page 7).
Nozzle
Combustion
Chamber
Air
Line
Hose
Fuel
Line
Hose
Photocell
Bracket
Photocell
Assembly
Side Cover
Figure 11 - Disconnecting Ignitor Wires
from Ignition Control Assembly
Ignitor Screw/Washer
Ignitor
Element
Photocell
Bracket
Combustion Chamber
Figure 12 - Ignitor Replacement
Nozzle Adapter
Bracket Opening
Adapter
Bracket
Ignitor
Ignitor
Wires
Ignition
Control
Assembly
Ignitor
Nozzle
Adapter
Bracket
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8
104655
• SERVICE PROCEDURES
SERVICE
PROCEDURES
Continued
NOZZLE ASSEMBLY
1. Remove upper shell (see page 7).
2. Remove fan (see page 7).
3. Remove fuel and air line hoses from
nozzle assembly (see Figure 13 or 14).
4. Turn nozzle assembly 1/4 turn to left
and pull toward motor to remove (see
Figure 15).
5. Place plastic hex-body into vise and
lightly tighten.
6. Carefully remove nozzle from the nozzle
adapter using 5/8" socket wrench (see
Figure 16).
7.
Blow compressed air through face of
nozzle. This will free any dirt in
nozzle area.
8. Inspect nozzle 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). See Figure 16.
10. Attach nozzle assembly to burner strap.
11. Attach fuel and airline hoses to nozzle
assembly. See Fuel and Air Line Re-
placement and Proper Routing.
12. Replace fan (see page 7).
13. Replace fan guard and upper shell.
Combustion
Chamber
Combustion
Chamber
Burner
Strap
Photocell
Bracket
Nozzle/
Adapter
Air
Line
Hose
Figure 14 - Removing Air and Fuel Line
Hoses (150,000, 155,000 and 165,000 Btu/
Hr Models Only)
Combustion
Chamber
Figure 15 - Removing Nozzle/Adapter
Assembly
Nozzle Face
Nozzle
Seal
Nozzle
Nozzle
Adapter
Assembly
Fuel Line
Hose
Nozzle/
Adapter
Assembly
FUEL AND AIR LINE
REPLACEMENT AND
PROPER ROUTING
1. Remove upper shell (see page 7).
2. Remove side cover screws using 5/16"
nut driver
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 13 or 14) and from fuel filter (see page 8). If air line hose is damaged, disconnect from nozzle adapter
(see Figure 13 or 14) and from barb fitting on pump end cover (see Figure 17).
5. Install new air and/or fuel line. Attach
one end of air line hose to barb fitting
on pump end cover (see Figure 17) and
the other end to nozzle adapter (see Figure 13 or 14). Attach one end of fuel
line hose to fuel filter (see page 8) and
the other end to nozzle adapter (see Figure 13 or 14). Route air and fuel line
approximately as shown in Figure 13 or
14.
Note:
Hoses are not to be touching pho-
tocell bracket.
6. Replace side cover.
7. Replace upper shell and fan guard (see
page 7).
Pump End Cover
Barb Fitting
Burner
Strap
Air Line
Hose
Nozzle/
Adapter
Assembly
Fuel Line
Photocell
Bracket
Figure 13 - Removing Air and Fuel Line
Hoses (110,000 and 115,000 Btu/Hr
Models Only)
104655
Hose
Air Line
Fitting
Figure 16 - Nozzle and Nozzle Adapter
9
Fuel Line
Fitting
Air Hose
Figure 17 - Air Hose to Barb Fitting
Continued
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• SERVICE PROCEDURES
SERVICE
PROCEDURES
Continued
PUMP ROTOR
(Procedure if Rotor is Binding)
1. Remove upper shell (see page 7).
2. Remove filter end cover screws using
5/16" nut-driver.
3. Remove filter end cover and air filters
(see Figure 18).
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 19).
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 7).
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 20).
15. Reinstall insert and rotor.
16. Perform steps 10 through 12 above.
Blade
Pump Plate
Air Intake Filter
Filter End
Cover
Insert
Rotor
Air Output
Filter
Fan Guard
Figure 18 - Rotor Location
Gap Adjusting Screw
Blade
.003"/.004"
Gap
Measured
With
Feeler
Gauge
Rotor
Gap Adjusting Screw
Figure 19 - Gap Adjusting Screw
Locations
Sandpaper
Figure 20 - Sanding Rotor
IGNITION CONTROL
ASSEMBLY
(Procedure for Replacing Fuse)
WARNING: High Voltage
1. Unplug heater.
2. Remove side cover screws (4) using
5/16" nut-driver to expose ignition control assembly.
3. Remove fuse cover (see Figure 21).
4. Remove fuse from fuse clips.
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.
7. Replace side cover.
Fuse
Clips
Figure 21 - Replacing Fuse
Fuse
Cover
Fuse
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10
104655
• WIRING DIAGRAM
• SPECIFICATIONS
• STORING, TRANSPORTING, OR
SHIPPING
WIRING DIAGRAM
Yellow
Red
Black
Thermostat
Green
Green
Power Plug
120V/60Hz
Figure 22 - Wiring Diagram
White
Motor
White
Photocell
Ignitor
Blue
Blue
Yellow
Ignitor
Motor Main
120V (L1)
AC Neutral (L2)
Ignition Control
Motor Return
Ignitor
Photocell
Photocell
STORING,
TRANSPORTING,
OR SHIPPING
Note:
If shipping, transport companies re-
quire fuel tanks to be empty.
1. Drain fuel tank.
Note:
This model has a drain plug on
underside of fuel tank. Remove drain
plug to drain all fuel. Be sure all fuel is
removed.
2. Replace drain plug.
3. If any debris is noted in old fuel, add 1
or 2 quarts of clean kerosene to tank,
stir, and drain again. This will prevent
excess debris from clogging filters during future use.
4. Replace fuel cap and 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:
summer months for use during next heating
season. Using old fuel could damage heater.
Do not store kerosene over
SPECIFICATIONS
Output Rating (Btu/Hr) 110,000 115,000 150,000 155,000 165,000
Fuel Use Only Kerosene or No. 1 Fuel Oil
Fuel Tank Capacity (U.S. Gal.) 9.0 9.0 13.5 13.5 13.5
Fuel Consumption (Gal. Per Hr.) 0.8 .85 1.1 1.14 1.2
Pump Pressure (p.s.i.) 5.3 5.3 5.4 5.4 5.6
Electric Requirements 120 V/60 Hz
Amperage (Normal Run) 3.6 3.6 3.6 3.6 3.6
Hot Air Output (CFM) 490 490 550 550 575
Motor RPM 3440 3440 3440 3440 3440
Motor HP 1/5 1/5 1/5 1/5 1/5
Shipping Weight
(Approximate Pounds) 54 54 63 63 65
Heater Weight without Fuel
(Approximate Pounds) 46 46 54 54 55
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11
For more information, visit www.desatech.com
• ILLUSTRATED PARTS
BREAKDOWN
ILLUSTRATED
PARTS
BREAKDOWN
110,000, 115,000 150,000,
155,000, AND 165,000
BTU/HR H.S.I. SERIES
2
1
3
7-4
7
4
6
24
28
5
8
11
23
20
22
19
25
18
29
9
10
12
15
26
27
7-5
7-1
16
7-2
7-6
7-3
10-1
10-2
10-3
10-17
10-16
10-15
10-13
Motor and Pump Assembly
10-4
10-14
10-5
10-13
35
36
10-6
10-12
21
30
31
38
14
32
17
37
13
33
34
14
10-7
10-8
10-9
10-10
10-18
10-11
For more information, visit www.desatech.com
12
104655
• PARTS LIST
PARTS LIST
110,000, 115.000 150,000,
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.
155,000, AND 165,000 BTU/
HR H.S.I. SERIES
KEY PART
NO. NUMBER DESCRIPTION QTY.
1 098511-66 Upper Shell (Service Part Will
Be Black) 1
2 100647-01 Screw, #10-16 x 1/2" 8
3 098512-54 Combustion Chamber (110/115) 1
098512-59 Combustion Chamber (150/155) 1
098512-60 Combustion Chamber (165) 1
4 103971-01 Photocell Bracket (110/115) 1
103154-05 Photocell Bracket (150/155/165) 1
5 M10908-2 Screw, #6-32 x 3/8" 2
6 M16656-24 Photocell Assembly 1
7 *** Burner Head Assembly 1
7-1 HA3027 Nozzle Assembly (110/115) 1
HA3028 Nozzle Assembly (150/155) 1
HA3029 Nozzle Assembly (165) 1
7-2 102548-03 Ignitor Kit 1
7-3 M10908-75 Screw 1
7-4 102336-01 Nozzle Adapter Bracket 1
7-5 104054-01 Nozzle Adapter 1
7-6 103347-01 Washer 1
8 107992-01 Screw, #10-16 x 3/8" 2
9 097293-01 Fan (110/115) 1
102042-01 Fan (150/155/165) 1
10 *** Motor and Pump Assembly 1
10-1 102001-21 Motor 1
10-2 079975-02 Pump Body 1
10-3 FHPF3-5C Screw, #10-32 x 5/8" 2
10-4 M22009** Rotor Insert 1
10-5 M22456-1** Pump Rotor 1
10-6 M50545 Pump End Cover 1
10-7 M12179** Intake Filter 1
10-8 M16545 Filter End Cover 1
10-9 M8940** Steel Ball, 1/4" Diameter 1
10-10 M10993-1** Relief Spring 1
10-11 M27694** Adjusting Screw 1
10-12 M22997** Plug 1
10-13 M12461-31 Screw, #10-32 x 1" 10
10-14 M12244-1** Output Filter 1
10-15 M11637** Lint Filter 1
10-16 104096-01 Fitting, Straight Nylon Barb 1
10-17 M8643** Blade 4
10-18 105780-01 Plastic Cap 1
11 M50631 Rubber Bumper 2
KEY PART
NO. NUMBER DESCRIPTION QTY.
12 101206-01 Motor Mounting Bracket 1
13 M10908-1 Screw, #6-32 x 1/4" 2
14 104068-02 Ignition Control Assembly 1
15 NTC-4C Hex Lock Nut, 1/4-20 2
16 M51114-01 Fan Guard 1
17 M27417 Drain Plug (Includes “o” Ring) 1
18 099213-01 Button Plug 1
19 M51345-06 Fuel Line 1
20 M51150-01** Fuel Filter 1
21 M51151-01 Fuel Line Tube (110/115) 1
M51151-02 Fuel Line Tube (150/155/165) 1
22 M10990-3 Rubber Bushing 1
23 M50814-03 Airline 1
24 098511-236 Lower Shell (Service Part Will
Be Black) 1
25 M50104-03 Bushing 1
26 M50104-01 Bushing 1
27 107992-01 Screw, #10-16 x 3/8" 6
28 M11271-8 Clip Nut 8
29 M10908-14 Screw, #8-32 x 3/8" 1
30 098513-87 Fuel Tank (110/115) 1
098513-67 Fuel Tank (150/155/165) 1
31 097702-01 Fuel Cap (Includes Gasket) 1
32 102349-01 P.C. Board Support 5
33 M11143-1 Strain Relief Bushing 1
34 098219-38 Power Cord 1
35 M51077-09AA Side Cover 1
36 107992-01 Screw, #10-16 x 3/8" 4
37 104905-01 Thermostat Knob 1
38 097657-03 Thermostat 1
103814-01 Wire Tie (Not Shown) - Groups 1
wires connected to Ignition
Control Assembly
OPTIONAL ACCESSORIES
HA1180 Air Gauge Kit
HA2210 Fuel Tank Filter Screen
HA3004 Rotor Kit (M22456-1, M22009, M8643)
HA3017 Filter Kit (M11637, M12179, M12244-1,
M51150-01)
HA3020 Pump Kit (M27694, M10993-1, M22997,
M8940)
** See OPTIONAL ACCESSORIES
*** Not available as an assembly.
104655
13
Continued
For more information, visit www.desatech.com
• PARTS LIST
PARTS LIST
Continued
WHEELS AND HANDLE PARTS LIST
KEY PART PART
NO. NUMBER DESCRIPTION QTY.
1 HA2203 Handle (110/115) 2 (If Equipped)
HA2204 Handle (150/155/165) 2 (If Equipped)
2 M12345-33 Screw, #10-24 x 1 3/4" 6 or 8
3 M12342-3 Wheel Support Frame (110/115) 1
M12831-3 Wheel Support Frame (150/155/165) 1
4 NTC-3C Hex Nut, #10-24 6 or 8
5 107426-01 Wheel Kit (Contains 2 Wheels
and Cap Nuts) —
6 M28526 Cap Nut 2
7 M51015-01 Axle (110/115) 1
M16801-2 Axle (150/155/165) 1
1
2
PART AVAILABLE - NOT
SHOWN
PART
NUMBER DESCRIPTION QTY.
100621-06 Thermostat Decal 1
3
7
5
6
4
For more information, visit www.desatech.com
14
104655
• REPLACEMENT PARTS
• TECHNICAL SERVICE
• ACCESSORIES
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 and serial numbers 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 at 1-800-458-2472
for referral information. Parts Centrals are
listed in the Authorized Service Center booklet supplied with heater.
When calling DESA International, have
ready:
• model and serial numbers of your heater
• the replacement part number
ACCESSORIES
Purchase accessories and parts from your
nearest dealer or service center. If they can
not supply these accessories or parts, either
contact your nearest Parts 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
1-800-458-2472
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.
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.
You can also visit DESA International’s
technical services web site at
www.desatech.com.
104655
15
For more information, visit www.desatech.com
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. Each Service Center is independently owned and operated. 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. We reserve the right to amend these specifications at any time without notice.
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.
For more information about this warranty write:
Corporate Headquarters
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
www.desatech.com
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.
104655 01
NOT A UPC
104655-01
Rev. J
03/01
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