Desa H.S.I. Series User manual

PORTABLE FORCED
AIR HEATER
(WITH BUILT-IN THERMOSTAT)
OWNER’S MANUAL
IMPORTANT: Read and understand this manual before assembling, start-
ing, or servicing heater. Improper use of heater can cause serious injury.
Keep this manual for future reference.
®
Fill In For Your Records
Model No. ___________________
(Located on side panel)
Serial No. ___________________
(Located on fuel tank)
Heater Size:
200,000 Btu/Hr
H.S.I. Series
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
SERVICE PROCEDURES...........................................7
WIRING DIAGRAM....................................................11
SPECIFICATIONS ..................................................... 11
STORING, TRANSPORTING, OR SHIPPING...........11
ILLUSTRATED PARTS BREAKDOWN .....................12
PARTS LIST...............................................................13
REPLACEMENT PARTS ...........................................15
TECHNICAL SERVICE ..............................................15
ACCESSORIES .........................................................15
WARRANTY AND REPAIR SERVICE .......................16

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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.
SAFETY
INFORMATION
WARNINGS
IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble, oper-
ate, or service this heater. Im-
proper use of this heater can
causeseriousinjuryordeathfrom
burns, fire, explosion, electrical
shock, and carbon monoxide
poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs
ofcarbonmonoxidepoisoningresemblethe
flu, with headaches, dizziness, and/or nau-
sea. 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.Theseincludepregnantwomen,per-
sons 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.Keepthismanualforreference.It
isyourguidetosafeandproperoperationof
this heater.
• Use only kerosene or No. 1 fuel oil to
avoid risk of fire or explosion. Never use
gasoline, naphtha, paint thinners, alco-
hol, or other highly flammable fuels.
• Fueling
a) Personnel involvedwithfueling shall
be qualified and thoroughly familiar
with the manufacturer’s instructions
and applicable federal, state, and lo-
cal regulations regarding the safe fu-
eling 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,shallbeextinguishedandtheheater
allowed to cool, prior to fueling.
d) During fueling,allfuel linesandfuel-
lineconnections shallbeinspectedfor
leaks.Any leaksshallberepairedprior
to returning the heater to service.
e) At no time shall more than one day’s
supply of heater fuel be stored inside
abuilding inthevicinity ofthe 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 (excep-
tion: the fuel reservoir integral with
the heater unit).
g) Whenever possible,fuelstorage shall
beconfined toareas wherefloor pen-
etrations 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 au-
thority having jurisdiction.
• Never use heater where gasoline, paint
thinner,or otherhighly flammablevapors
are present.
• Follow all local ordinances and codes
when using heater.
• Heaters used in the vicinity of tarpaulins,
canvas, or similar enclosure materials
shallbelocatedasafedistancefromsuch
materials. The recommended minimum
safe distance is 10 feet. It is further rec-
ommended that these enclosure materi-
als be of a fire retardant nature. These
enclosure materials shall be securely fas-
tened 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
heaterproduces carbon monoxide, which
is listed by the State of California as a
reproductive toxin under Proposition 65.
• Use only in places free of flammable va-
pors or high dust content.
• Use only the electrical voltage and fre-
quency specified on model plate.
• Use only a three-prong, grounded exten-
sion cord.
• Minimum heater clearances from com-
bustibles:
Outlet: 8 Ft. Sides: 4 Ft.
Top: 4 Ft. Rear: 4 Ft.
• Locate heater on a stable and level sur-
face 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.
• Approved by the New York City Fire
Department under certificate of approval
#4803, #4860, #4908, or #4909. To be
used only at construction sites in accor-
dance with applicable New York City
Codes, Regulations, Rules, Directives,
Permits, etc.
•Warning to New York City Residents
For Use Only At Construction Sites
inaccordance withapplicable NYC codes
under NYCFD certificate of approval
#4803, #4899, #4908, #4909, or #4934.
•SAFETY INFORMATION
•UNPACKING

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Figure 2 - Wheel and Handle Assembly
Figure 1 - 200,000 Btu/Hr
PRODUCT IDENTIFICATION
Lower Shell
Hot Air
Outlet Fan Guard
Fuel Tank
Side Cover
Fuel Cap
Upper Shell
Power Cord
Ignition Control Assembly
(on inside of side cover)
Handle
Wheel
Support
Frame
Wheel Extended
Hub
Hot Air
Outlet
Fuel
Tank
Flange
Screw
Nut
Cap Nut
Axle
Air
Inlet
Thesemodelsarefurnishedwithwheelsand
a rear handle. Some models are furnished
with a front handle also. Wheels, handle(s),
andthe 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: When installing wheels,
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
fueltankflange withholes onwheelsup-
port 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.
ASSEMBLY
Thermostat Knob
•PRODUCT IDENTIFICATION
•ASSEMBLY

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OPERATION
WARNING: Review and un-
derstand the warnings in the
Safety Information section, page
2. They are needed to safely op-
erate 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. Turn thermostat knob clockwise to the
HIGH position.
5. 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
6. Plug extension cord into standard 120
volt/60hertz, three-hole, grounded out-
let. Note: Ignitor will preheat for five
seconds then heater will start.
7. Adjust thermostat knob to the desired
setting.
Note: A cold heater may affect the thermo-
stat setting. This thermostat is a general-
heating control. It is not intended for preci-
siontemperaturecontrol.Adjustthermostat
until heater cycles at the desired setting.
Figure 3 - Cross Section Operational View
Clean
Heated
Air Out
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.
The Ignition System: The ignition control
assembly provides power to the ignitor.
This ignites the fuel/air mixture in the com-
bustion chamber.
TheFlame-OutControlSystem: Thissys-
tem causes the heater to shut down if the
flame goes out.
Fuel
Filter Air Line
To Burner
Air
Output
Filter
Air Pump
Air Intake
Filter
Cool
Air
In
Fan
Combustion ChamberIgnitor Motor
Ignition Control
Assembly
Air For Fuel System Air For Combustion
And Heating Fuel
Nozzle
Fuel
Tank
THEORY OF OPERATION
WARNING:Useonlykerosene
orNo.1fueloil toavoidriskoffire
orexplosion.Neverusegasoline,
naphtha, paint thinners, alcohol,
or other highly flammable fuels.
Donotuseheavyfuels suchasNo.2 fueloil
or No. 2 Diesel. Using heavy fuels will
result in a clogged fuel filter and/or nozzle.
IMPORTANT: Use a KEROSENE ONLY
storagecontainer.Besurestoragecontaineris
clean. Foreign matter such as rust, dirt, or
waterwillcausetheignitioncontrolassembly
to shut down the heater. Foreign matter may
also require you to clean fuel system often.
Followtheminimumfresh,out-
sideairventilation requirements. If
properfresh,outsideairventilation
is not provided, carbon monoxide
poisoning can occur. Provide
properfresh,outsideairventilation
before running heater.
Provideatleasta three-square-footopening
offresh,outsideairforeach100,000Btu/Hr
rating. Provide extra fresh air if more heat-
ers are being used.
Example: A 200,000 Btu/Hr heater re-
quires one of the following:
• atwo-car garage door (16feet wide open-
ing) raised 5 inches
• a single-car garage door (9 feet wide
opening) raised 8 inches
• two 30 inch wide windows raised 15
inches
FUELS
VENTILATION
•FUELS
•VENTILATION
•THEORY OF OPERATION
•OPERATION

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PREVENTATIVE MAINTENANCE SCHEDULE
WARNING: Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
Item
Fuel tank
Air output and lint filters
Air intake filter
Fuel filter
Ignitor
Fan blades
Motor
How Often
Flush every 150-200 hours of operation or
as needed
Replace every 500 hours of operation or
once a year
Wash and dry with soap 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
How To
See Storing, Transporting, or Shipping,
page 11
SeeAir Output, Air Intake,and Lint Filters,
page 7
SeeAir Output, Air Intake,and Lint Filters,
page 7
See Fuel Filter, page 8
See Fan, page 7
•OPERATION
•OPERATION WITH PORTABLE
GENERATOR
•PREVENTATIVE MAINTENANCE
SCHEDULE
OPERATION WITH
PORTABLE
GENERATOR
WARNING: Before operating
heater or any appliance from a
portable generator, verify that
generatorhasbeenproperlycon-
nectedtoearthground.Improper
grounding or failure to ground
generator can result in electro-
cution if a ground fault occurs.
Refertoowner’smanualsupplied
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
equippedwith the automatic idle feature,the
output voltage should be measured with the
generator running at full speed). If the volt-
age does not measure in this range the heater
should not be plugged into the generator.
RefertoOperation,pages4and5,forstarting,
stopping, and resetting heater procedures.
Figure 4 - Typical Generator Grounding
Method(Generatorconstructionmayvary
from that shown)
Alternator
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/60hertz, three-hole, grounded out-
let. Note: Ignitor will preheat for five
seconds then heater will start.
4. Adjust thermostat knob to the desired
setting.
Ground Lug
Ground Wire (#10 AWG
Stranded-Copper)
Copper
or Brass
Grounding
Point
OPERATION
Continued

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TROUBLESHOOTING WARNING: Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
FAULT CONDITION
Motordoesnotstartfivesecondsafterheater
is plugged in
Motor starts and runs but heater does not
ignite
Heaterignitesbutignitioncontrolassembly
shuts heater off after a short period of time
POSSIBLE CAUSE
1. No power to heater
2. Thermostat setting to low
3. Bad electrical connection between mo-
tor and ignition control assembly or ig-
nition control assembly and power cord
4. Blown fuse on ignition control assembly
5. Binding pump rotor
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. Defective fuel valve
7. Bad electrical connection between igni-
tor and ignition control assembly
8. Defective ignitor
9. 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 in-
stalled (not seeing the flame)
6. Dirty photocell lens
7. Bad electrical connection between pho-
tocell and ignition control assembly
8. Defective photocell
9. Defective ignition control assembly
REMEDY
1. Check circuit breaker in electrical panel
2. Turn thermostat knob clockwise to a
higher setting
3. Check all electrical connections. See
Wiring Diagram, page 11
4. See Ignition Control Assembly, page 10
5. If fan does not turn freely, see Pump
Rotor, page 10
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, Transporting, or
Shipping, page 11
6. See Fuel Valve, page 8
7. Check electrical connections. See Wir-
ing Diagram, page 11
8. Replace ignitor, see page 9
9. Replace ignition control assembly
1. See Pump Pressure Adjustment, page 7
2. See Air Output, Air Intake, and Lint Fil-
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
WARNING: High voltage!
WARNING: High voltage!
WARNING: High voltage!
Note: For additional help, visit DESA
International’s technical service web
site at www.desatech.com.
www.desatech.com
•TROUBLESHOOTING

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Figure 8 - Pressure Gauge Plug Removal
Figure 9 - Adjusting Pump Pressure
Fan
Motor
Figure 7 - Air Output, Air Intake, and Lint
Filters
Flush
Setscrew
Motor
Shaft
Figure 6 - Fan Cross Section
SERVICE
PROCEDURES
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.
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 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.
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: Do not oil filters.
PUMP PRESSURE
ADJUSTMENT
1. Remove pressure gaugeplug from filter
end cover (see Figure 8).
2. Install accessory pressure gauge (part
number HA1180).
3. Start heater (seeOperation, pages 4 and
5). Allow motor to reach full speed.
4. Using a flat blade screwdriver, adjust
pressure to 6.2 PSI. Turn relief valve to
right to increase the pressure. Turn relief
valve to left to decrease the pressure.
5. Stop heater (see Operation, pages 4
and 5).
6. Remove pressure gauge. Replace pres-
sure gauge plug in filter end cover.
Figure 5 - Upper Shell Removal
Upper
Shell
Fan
Guard
Relief
Valve
Pressure
Gauge
Plug
Pressure
Gauge
Continued
WARNING: Never service
heater while it is plugged in, op-
erating,or hot. Severe burns and
electrical shock can occur.
Fan Guard
Air Intake
Filter
Air Output
Filter
Filter End
Cover
Lint
Filter
•SERVICE PROCEDURES

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SERVICE
PROCEDURES
Continued
FUEL FILTER
1. Remove side cover screws using
5/16" nut-driver.
2. Remove side cover.
3. Pull lower fuel line off the fuel
valve fitting.
4. Carefully pry bushing, lower fuel
line, and fuel filter out of fuel tank.
5. Wash fuel filter with clean fuel and
replace in tank.
6. Attach lower fuel line to fuel valve
fitting.
7. Replace side cover.
FUEL VALVE
1. Remove side cover (see Figure 9),
fan guard, and upper shell (see Fig-
ure 5, page 7) screws using 5/16"
nut-driver.
2. Remove fan (see Fan, page 7).
3. Pull lower fuel line off the fuel valve
fitting (see Figure 11).
WARNING: High Voltage
4. Disconnect red and white wires from
fuel valve (see Figure 11).
5. Using 1/4" nut driver remove 2 screws
holding fuel valve and bracket to lower
shell(see Figure 11).Save these screws.
6. Using 1/4" nut driver remove 2 screws
holding fuel valve to bracket. Save
these screws.
7. Attach new fuel valve to bracket with
2 screws.
8. Install new fuel valve and bracket on
lower shell with 2 screws.
9. Connect red and white wires (polarity
notimportant).Connect upperand lower
fuel lines to fuel valve (see Figure 11).
10. Replace fan, fan guard, upper shell, and
side cover.
Side Cover
Bushing, Lower Fuel Line,
and Fuel Filter
Figure 10 - Fuel Filter Removal
Fuel Valve Fitting
Figure 11 - Fuel Valve Replacement
Lower Fuel
Line
Electrical Wires
Fuel Valve
Valve
Fittings
Bracket
Screw
Screw
Screw
•SERVICE PROCEDURES

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SERVICE
PROCEDURES
Continued
Nozzle Face
Nozzle
Nozzle
Seal
Nozzle
Adapter
Bracket Air Line
Fitting Fuel Line
Fitting
Figure 15 - Nozzle and Nozzle Adapter
NOZZLE ASSEMBLY
1. Remove combustion chamber and ig-
nitor by following steps 1 through 7
under Ignitor, column 1.
2. Carefully place the ignitor in a safe lo-
cation.
3. Remove two nozzle adapter bracket
screws (see Figure 14).
Continued
Combustion
Chamber
Photocell
Bracket
Photocell
Assembly
Air
Line
Hose
Fuel
Line
Hose
Combustion
Chamber
Photocell
Bracket
Ignitor
Wires
Ignitor
Nozzle
Adapter
Bracket
Ignition
Control
Assembly
Side Cover
Figure 12 - Disconnecting Ignitor Wires
from Ignition Control Assembly
Ignitor
Ignitor Screw
Nozzle
Adapter
Bracket
Nozzle Adapter
Bracket Opening
Ignitor
Element
Figure 13 - Ignitor Replacement
CAUTION:Donotbendorstrike
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 us-
ing a 1/4" nut driver (see Figure 13).
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,
page 8).
13. Connect and route fuel line hose and
air line hose to nozzle assembly (see
Figure 14).
14. Replace photocell in photocell bracket.
15. Replace fan (see page 7).
16. Replace fan guard and upper shell (see
page 7).
Fuel Line
Hose
Nozzle/
Adapter
Assembly
Combustion
Chamber
Figure 14 - Removing Air and Fuel Line
Hoses
Nozzle
Adapter
Bracket
Photocell
Bracket
Air Line
Hose
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, page 8).
4. Disconnect ignitor wires (black) from
ignition control assembly (see Figure
12). Pull the ignitor wires up through
the hole in the lower shell.
5. Disconnect fuel line hose and air line
hose.Remove photocell from photocell
bracket (see Figure 12).
6. Remove combustion chamber. Stand
combustion chamber on end with
nozzle adapter bracket on top (see Fig-
ure 13).
7. Remove ignitor screw with a 1/4" nut
driver. Carefully remove ignitor from
nozzle adapter bracket. Washer
4. Place hex-shaped aluminum nozzle
adapter into vise (do not overtighten).
5. Carefully remove nozzle from nozzle
adapter using 5/8" socket wrench (see
Figure 15).
6. Blow compressed air through face of
nozzle. This will remove any debris
in nozzle.
7. Inspect nozzle seal for damage.
8. Replace nozzle into nozzle adapter un-
til nozzle seats. Tighten 80-110 inch-
pounds.
9. Attach nozzle adapter bracket to com-
bustion chamber with two screws re-
moved in step 3.
10. Repeat steps 9 through 16 under Igni-
tor, column 1.
Nozzle
Adapter
Nozzle
Adapter
Bracket
Screw
•SERVICE PROCEDURES

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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 con-
trol assembly.
3. Remove fuse cover (see Figure 19).
4. Remove fuse from fuse clips.
5. Replace fuse with fuse of the same type
and rating (GMA-10). Do not substi-
tute a fuse with a higher current rating.
6. Replace fuse cover.
7. Replace side cover.
SERVICE
PROCEDURES
Continued
Figure 19 - Replacing Fuse
Fuse
Fuse
Cover
Fuse
Clips
Sandpaper
.003"/.004"
Gap
Measured
With
Feeler
Gauge
Blade
Rotor
Gap Adjusting Screw
Gap Adjusting Screw
Figure 16 - Rotor Location
Figure 17 - Gap Adjusting Screw
Locations
Figure 18 - Sanding Rotor
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 16).
4. Remove pump platescrews 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 in-
sure 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 Fig-
ure 18).
15. Reinstall insert and rotor.
16. Perform steps 10 through 12 above.
Fan Guard
Filter
End
Cover
Air
Intake
Filter
Pump
Plate
Blade
Air Output
Filter
Rotor
Insert
•SERVICE PROCEDURES

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SPECIFICATIONS
Output Rating (Btu/Hr) 200,000
Fuel Use Only Kerosene or No. 1 Fuel Oil
Fuel Tank Capacity (U.S. Gal.) 13.5
Fuel Consumption (Gal. Per Hr.) 1.4
Pump Pressure (PSI) 6.2
Electric Requirements 120 V/60 Hz
Amperage (Normal Run) 3.6
Hot Air Output (CFM) 600
Motor RPM 3400
Motor HP 1/4
Shipping Weight
(Approximate Pounds) 77
Heater Weight without Fuel
(Approximate Pounds) 66
Figure 20 - Wiring Diagram
WIRING DIAGRAM
Power Plug
120V/60Hz
Blue
Photocell
Photocell
Ignitor
Motor Return
AC Neutral (L2)
AC Hot (L1)
Motor
Ignitor
Blue
White
White
White
White
Photocell
Ignition Control Assembly
Green Green
Red
Red
Red
Black
Black
Black
Black
Motor
Ignitor
Solenoid
Valve
Thermostat
•WIRING DIAGRAM
•SPECIFICATIONS
•STORING, TRANSPORTING, OR
SHIPPING
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 dur-
ing future use.
4. Replace fuel cap and drain plug. Prop-
erlydispose of old anddirty 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.Usingoldfuelcoulddamageheater.

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1
2
3
23 19
910
11
12
13
15
25
27
24
28
29
30
31
17
14
14
33
34
35
36 32
26
5
46
7
8
16
18
37
38
20
22
21
39
42
41
40
43
ILLUSTRATED
PARTS
BREAKDOWN
200,000 Btu/Hr
Motor and Pump Assembly
10-1
10-2
10-3
10-4 10-5
10-6
10-7 10-8
10-9 10-10
10-11
10-12
10-18 10-14
10-15
10-16
10-17
10-13
Fuel Valve Assembly
Nozzle Assembly
7-1
7-8
7-7
7-3
7-4
7-5
7-6
7-2
7-11
7-10
7-9
39-4
39-4
39-3
39-5
39-2
39-1
39-6
39-7
10-19
•ILLUSTRATED PARTS
BREAKDOWN

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KEY PART
NO. NUMBER DESCRIPTION QTY.
1 107353-01 Upper Shell (Service Part
Will Be Black) 1
2 100647-01 Screw, #10-16 x 1/2" 8
3 098512-69 Combustion Chamber 1
4 103154-05 Photocell Bracket 1
5 M10908-2 Screw, #6-32 x 3/8" 2
6 M16656-24 Photocell Assembly 1
7 *** Burner Head Assembly 1
7-1 100735-13 Nozzle Assembly 1
7-2 M10659-1 Nozzle Washer 2
7-3 M10809-1 Nozzle Spring 1
7-4 M8882 Nozzle Sleeve 1
7-5 107272-01 Retaining Ring 1
7-6 102336-03 Nozzle Adapter Bracket 1
7-7 102548-06 Ignitor Kit 1
7-8 103347-01 Belleville Washer 1
7-9 M10908-75 Screw, #6-32 x .88 1
7-10 107273-01 Nozzle Adapter 1
7-11 M50820-02 Barb Fitting 1
8 107992-01 Screw, #10-16 x 3/8" 2
9 102042-01 Fan 1
10 *** Motor and Pump Assembly 1
10-1 102001-27 Motor 1
10-2 079975-03 Pump Body 1
10-3 FHPF3-6C Screw, #10-32 x 5/8" 2
10-4 M22009** Rotor Insert 1
10-5 M22456-2** Pump Rotor 1
10-6 M50545 Pump End Cover 1
10-7 M12179** Intake Filter 1
10-8 M16545 Filter End Cover 1
10-9 M8940** Steel Ball, 1/4" Diameter 1
10-10 M10993-1** Relief Spring 1
10-11 M27694** Adjusting Screw 1
10-12 M22997** Plug 1
10-13 M12461-31 Screw, #10-32 x 1" 4
10-14 M12244-1** Output Filter 1
10-15 M11637** Lint Filter 1
10-16 M50820-02 Barb Fitting 1
10-17 M8643-2** Blade 4
10-18 M12461-32 Screw, #10-32 x 1.12" 6
10-19 105780-01 Plastic Cap 1
11 M50631 Rubber Bumper 2
12 101206-01 Motor Mounting Bracket 1
13 097785-04 Foam Gasket 2
14 104068-02 Ignition Control Assembly 1
15 NTC-4C Hex Lock Nut, 1/4-20 2
PARTS LIST
200,000 Btu/Hr
This list contains replaceable parts used in your heater. When ordering parts, be sure to provide the
correct model and serial number (from the model plate), then the part number and description of the
desired part.
** See OPTIONAL ACCESSORIES *** Not available as an assembly.
KEY PART
NO. NUMBER DESCRIPTION QTY.
16 102756-01 Fan Guard 1
17 M27417 Drain Plug (Includes “o”Ring) 1
18 103523-01 Rubber Bushing 1
19 M51345-03 Fuel Line 1
20 M51150-01** Fuel Filter 1
21 M51345-04 Fuel Line Tube 1
22 M10990-3 Rubber Bushing 1
23 M50814-03 Airline 1
24 107353-05 Lower Shell (Service Part
Will Be Black) 1
25 M30865-02 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 098513-105 Fuel Tank 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 107333-04AA Side Cover 1
36 107992-01 Screw, #10-16 x 3/8" 4
37 099230-01 Screw, Special 2
38 M11084-27 Screw, #10-16 x 1/2" 2
39 *** Fuel Valve Assembly 1
39-1 107643-01 Fuel Valve 1
39-2 107336-01 Fuel Valve Bracket 1
39-3 M12461-13 Hex Head Screw, #8-32 x 1/4" 2
39-4 M50820-02 Fitting Barb 2
39-5 102432-01 Screw Hex Hd Sems Ext "B"
#10-16 x 1/2" 2
39-6 107274-01 Wire Assembly, Red 1
39-7 107274-02 Wire Assembly, White 1
40 097657-03 Thermostat 1
41 M10908-1 Screw, #6-32 x 1/4" 2
42 104905-01 Thermostat Knob 1
43 079010-35 Wire Assembly 1
OPTIONAL ACCESSORIES
HA1180 Air Gauge Kit
HA2210 Fuel Tank Filter Screen
HA3005 Rotor Kit (M22456-2, M22009, M8643-2)
HA3017 Filter Kit (M11637, M12179, M12244-1,
M51150-01)
HA3020 Pump Kit (M27694, M10993-1, M22997,
M8940)
•PARTS LIST

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2
3
4
WHEELS AND HANDLE PARTS LIST
KEY PART PART
NO. NUMBER DESCRIPTION QTY.
1 HA2204 Handles 2
2 M12345-33 Screw, #10-24 x 1 3/4"8
3 M12831-3 Wheel Support Frame 1
4 NTC-3C Hex Nut, #10-24 8
5 107426-01 Wheel Kit (Contains
2 Wheels and Cap Nuts) –
6 M28526 Cap Nut 2
7 M16801-2 Axle 1
PARTS AVAILABLE - NOT SHOWN
PART
NUMBER DESCRIPTION QTY.
103814-01 Wire Tie 1
100621-06 Thermostat Decal 1
PARTS LIST
Continued
5
7
6
•PARTS LIST

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TECHNICAL
SERVICE
You may have further questions about op-
eration or troubleshooting. If so, contact
DESA International’s Technical Service
Dept. at 1-800-323-5190.
You can also visit DESA International’s
technical service web site at
www.desatech.com.
REPLACEMENT
PARTS
Note: Use only original replacement parts.
Thiswillprotectyourwarrantycoveragefor
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 Techni-
cal 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,wewillask youtoreturn thedefec-
tive part to the factory.
PARTS NOT UNDER
WARRANTY
Contact authorized dealers of this product. If
theycan’tsupplyoriginalreplacementpart(s),
call DESA International at 1-800-458-2472
for referral information. Parts Centrals are
listedintheAuthorizedServiceCenterbook-
let supplied with heater.
When calling DESA International, have
ready:
• model number of your heater
• the replacement part number
AIR GAUGE KIT - HA1180
Special tool to check pump pressure.
IGNITION CONTROL
ASSEMBLY/PHOTOCELL
TESTER - HA1170
Special tool used to test the ignition control
assembly and photocell.
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
CentralsarelistedintheAuthorizedService
Center booklet supplied with heater.
DESA International
P.O. Box 90004
Bowling Green, KY
42102-9004
1-800-458-2472
•REPLACEMENT PARTS
•TECHNICAL SERVICE
•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
workmanship. 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.
Illustratedpartslistscan beobtainedfreeofcharge. Sendaselfaddressed
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,besuretoincludethe
model number and serial number as shown on 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
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.
LIMITED WARRANTY
DESA International warrants this product and any parts thereof, to
befreefromdefectsinmaterialsandworkmanshipforone(1)year
from the date of first purchase when operated and maintained in
accordancewithinstructions.Thiswarrantyisextendedonly tothe
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.
Thiswarrantydoesnot cover defectsresultingfrommisuse,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, inci-
dental 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.
Model No.
Serial No.
Date of Purchase
(To be filled in by purchaser)
KEEP THIS WARRANTY
107325-01
Rev. E
03/01
INTERNATIONAL
NOT A UPC
107325 01