Desa B115T 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.
®
Heater Size: 115,000 Btu/Hr
Models: B115T, R115T, and REM115T
H.S.I. Series

2
104193
PORTABLE FORCED AIR HEATER
115,000 Btu/Hr H.S.I. Series
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
Carbon Monoxide Poisoning: Early
signs of carbon monoxide poisoning re-
semble 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 preg-
nant women, persons with heart or lung
diseaseoranemia,thoseundertheinfluence
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
usegasoline,naphtha,paintthinners,al-
cohol, or other highly flammable fuels.
• Fueling
a)Personnelinvolvedwith fueling 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) Allflame,includingthepilotlight,ifany,
shall be extinguished and the heater al-
lowed to cool, prior to fueling.
d)Duringfueling,allfuellinesandfuel-
lineconnectionsshallbeinspected for
leaks.Any leaksshallberepaired prior
to returning the heater to service.
e)At no time shall more than one day’s
supply of heater fuel be stored inside
abuildinginthevicinityoftheheater.
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)Wheneverpossible,fuelstorageshall
be confined to areas where floor 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
withthefederal,state,orlocalauthor-
ity having jurisdiction.
• Never use heater where gasoline, paint
thinner, or other highly flammable va-
pors are present.
• Follow all local ordinances and codes
when using heater.
• Heaters used in the vicinity of tarpau-
lins, canvas, or similar enclosure mate-
rials shall be located a safe distance
fromsuchmaterials.The recommended
minimum safe distance is 10 feet. It is
further recommended that these enclo-
sure materials be of a fire retardant na-
ture. These enclosure materials shall be
securely fastened to prevent them from
ignitingorfromupsettingtheheaterdue
to wind action.
• Use only in well-vented areas. Before
using heater, provide at least a three-
square-footopeningoffresh,outsideair
for each 100,000 Btu/Hr of rating. This
heater produces carbon monoxide,
which is listed by the State of Califor-
niaasareproductivetoxinunderPropo-
sition 65.
• Use only in places free of flammable
vapors or high dust content.
• Use only the electrical voltage and fre-
quency specified on model plate.
• Use only a three-prong, grounded ex-
tension 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 spill-
age may occur.
• Keep children and animals away from
heater.
• Unplug heater when not in use.
• Whenused 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 NewYork City Residents
ForUse OnlyAtConstructionSitesin
accordance with applicable NYC codes
under NYCFD certificate of approval
#4803, #4899, #4908, #4909, or #4934.
WARNINGS
IMPORTANT: Read this Owner’s
Manual carefully and completely
before trying to assemble, oper-
ate,orservicethisheater.Improper
use of this heater can cause seri-
ous injury or death from burns,
fire, explosion, electrical shock,
and carbon monoxide poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!

3
104193
OWNER’S MANUAL
Figure 1 - Portable Forced Air Heater
PRODUCT
IDENTIFICATION
ASSEMBLY
Thesemodelsarefurnishedwithwheelsand
a front handle. Some models are furnished
with a rear 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: Wheninstallingwheels,
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 air inlet end (rear) of heater is
over wheels. Line up holes on fuel tank
flangewith holesonwheelsupportframe.
4. Placefronthandle(andrearhandleifpro-
vided) on top of fuel tank flange. Insert
screwsthroughhandle(s),fueltankflange,
and wheel support frame. Attach nut
finger tight after each screw is inserted.
5. After all screws are inserted, tighten
nuts firmly.
Figure 2 - Wheel and Handle Assembly
Lower
Shell
Hot Air
Outlet
Fan Guard
Fuel Tank
Side Cover
Fuel
Cap
Upper Shell
Power Cord
Ignition Control
Assembly (assembly on
inside of side cover)
Thermostat Knob
Front
Handle
Wheel
Support
Frame
Wheel
Hot Air
Outlet
Fuel
Tank
Flange
Screw
Nut
Cap Nut
Rear
Handle
Extended Hub
Axle
Air Inlet

4
104193
PORTABLE FORCED AIR HEATER
115,000 Btu/Hr H.S.I. Series
Donotuseheavyfuels such as No. 2 fuel oil
orNo.2Diesel.Usingheavyfuelswillresult
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.
Provide at least a three-square-foot opening
offresh,outsideairforeach100,000Btu/Hr
rating.Provideextrafreshairifmoreheaters
are being used.
Example: A 115,000 Btu/Hr heater re-
quires one of the following:
• atwo-cargarage door (16 feet wide open-
ing) raised three inches
• a single-car garage door (9 feet wide
opening) raised five inches
• two 30 inch wide windows raised eight
inches
FUELS
WARNING:Useonlykerosene
orNo.1fueloiltoavoidriskoffire
orexplosion.Neverusegasoline,
naphtha, paint thinners, alcohol,
or other highly flammable fuels.
VENTILATION
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.
TheAirSystem: Themotorturnsthefan.
The fan pushes air into and around the
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
Follow the minimum fresh,
outside air ventilation require-
ments.Ifproperfresh,outsideair
ventilation is not provided, car-
bon monoxide poisoning can oc-
cur. Provide proper fresh, out-
side air ventilation before run-
ning heater.
combustion chamber. This air is heated and
provides a stream of clean, hot air.
The Ignition System: The ignition con-
trol assembly provides power to the ignitor.
This ignites the fuel/air mixture in the com-
bustion chamber.
The Flame-Out Control System: This
system causes the heater to shut down if the
flame goes out.

5
104193
OWNER’S MANUAL
TO START HEATER
1. Follow all ventilation and safety infor-
mation.
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
• 6to10 feet long,use18AWG rated cord
• 11 to100feetlong,use16AWGrated
cord
• 101 to 200 feet long, use 14 AWG
rated cord
6. Plug extension cord into standard 120
volt/60 hertz, three-hole, grounded out-
let. Note: Ignitor will preheat for five
seconds then heater will start.
7. Adjustthermostatknobtothedesiredset-
ting. Note: A cold heater may affect the
thermostat setting. Further adjustment
may be needed until the heater cycles at
the desired setting. This thermostat is a
general-heatingcontrol.It isnotintended
for precise temperature control.
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. Plugextensioncordintostandard120volt/
60 hertz, three-hole, grounded outlet.
Note: Ignitor will preheat for five sec-
onds then heater will start.
4. Adjust thermostat knob to the desired
setting.
OPERATION
WARNING: Review and un-
derstand the warnings in the
Safety Information section, page
2.Theyareneededtosafelyoper-
ate this heater. Follow all local
codes when using this heater.
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.
PREVENTATIVE
MAINTENANCE
SCHEDULE
WARNING:Neverserviceheaterwhile
itispluggedin,operating,orhot.Severe
burns and electrical shock can occur.
Item
Fuel tank
Air output and
lint filters
Airintakefilter
Fuel filter
Ignitor
Fan blades
Motor
How To
See Storing, Transporting, or
Shipping, above
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
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 and dirty fuel. Check
with local automotive service stations
that recycle oil.
5. If storing, store heater in dry place.
Make sure storage place is free of dust
and corrosive fumes.
IMPORTANT: Do not store kerosene over
summer months for use during next heating
season.Usingoldfuelcould damage heater.
How Often
Flush every 150-200 hours of opera-
tion or as needed
Replace every 500 hours of operation
or once a year
Washanddrywithsoapanwaterevery
500 hours of operation or replace as
needed
Clean twice a heating season or re-
place as needed
No maintenance required
Clean each season or as needed
Not required/permanently lubricated

6
104193
PORTABLE FORCED AIR HEATER
115,000 Btu/Hr H.S.I. Series
TROUBLESHOOTING WARNING: Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
OBSERVED FAULT
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 too 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. Bad electrical connection between igni-
tor 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 properlyinstalled
(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 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 withcleankero-
sene.SeeStoring, Transporting,or Ship-
ping, page 5
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 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:Highvoltage!
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

7
104193
OWNER’S MANUAL
Figure 7 - Pressure Gauge Plug Removal
Fan
Motor
Figure 6 - Air Output, Air Intake, and Lint
Filters
Flush
Setscrew
Motor
Shaft
Figure 5 - Fan Cross Section
SERVICE
PROCEDURES
WARNING: Never service
heater while it is plugged in, op-
erating,or hot.Severeburns 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.
FAN
IMPORTANT: Removefanfrommotorshaft
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 5).
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, column 1).
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 gauge plug from filter
end cover.
2. Install accessory pressure gauge (part
number HA1180).
3. Start heater (see Operation, page 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 PSI.
5. Stop heater (see Operation, page 5).
6. Remove pressure gauge. Replace pres-
sure gauge plug in filter end cover.
Figure 4 - Upper Shell Removal
Upper
Shell Fan
Guard
Fan Guard
Air Intake Filter
Air Output Filter
Filter End Cover
Lint Filter
Relief
Valve
Pressure
Gauge
Plug
Pressure
Gauge
Figure 8 - Adjusting Pump Pressure
Continued

8
104193
PORTABLE FORCED AIR HEATER
115,000 Btu/Hr H.S.I. Series
Figure 9 - Fuel Filter Removal
SERVICE
PROCEDURES
Continued
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. Wash fuel filter with clean fuel and re-
place in tank.
6. Attach upper fuel line to fuelfilterneck.
7. Replace side cover.
Side Cover
Fuel Filter, Bushing,
and Lower Fuel Line
Upper Fuel Line
WARNING: Never service
heaterwhileitispluggedin,oper-
ating, or hot. Severe burns and
electrical shock can occur.
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 9).
4. Disconnect ignitor wires (yellow) from
ignition control assembly (see Figure
10). Pull the ignitor wires up through
the hole in the lower shell.
5. Disconnect fuel line hose and air line
hose.Removephotocellfromphotocell
bracket (see Figure 10).
6. Remove combustion chamber. Stand
combustionchamberon end withnozzle
adapter bracket on top (see Figure 11).
7. Remove ignitor screw with a 1/4" nut
driver. Carefully remove ignitor from
nozzle adapter bracket.
8. Carefully remove replacement ignitor
from styrofoam packing.
9. Carefully guide ignitor into opening in
nozzle adapter bracket. Do not strike
ignitorelement.Attachignitortonozzle
adapter bracket with screw using a
1/4" nut driver (see Figure 11). Torque
8 to 15 in. lbs. Do not over torque.
10. Replace combustion chamber.
11. Routetheignitorwiresbackdownthrough
the hole in the lower shell. Connect wires
to the ignition control assembly.
12. Replace side cover (see Figure 9).
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).
Combustion
Chamber
Photocell
Bracket
Photocell
Assembly
Air
Line
Hose
Fuel
Line
Hose
Photocell
Bracket
Ignitor
Wires
Nozzle
Adapter
Bracket
Ignition
Control
Assembly
Side Cover
Figure 10 - Disconnecting Ignitor Wires
from Ignition Control Assembly
Ignitor
Ignitor Screw/Washer
Assembly
Nozzle
Adapter
Bracket
Nozzle Adapter
Bracket Opening
Ignitor
Element
CAUTION:Donotbendorstrike
ignitor element. Handle with care.
Combustion
Chamber
Figure 11 - Ignitor Replacement
Ignitor

9
104193
OWNER’S MANUAL
SERVICE
PROCEDURES
Continued
Figure 12 - Removing Air and Fuel Line
Hoses
Nozzle/
Adapter
Assembly
Combustion
Chamber
Figure 13 - Removing Nozzle/Adapter
Assembly
Nozzle Face
Nozzle
Nozzle
Seal
Nozzle
Adapter
Air Line
Fitting Fuel Line
Fitting
Figure 14 - Nozzle and Nozzle Adapter
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 12).
4. Turn nozzle assembly 1/4 turn to left
and pull toward motor to remove (see
Figure 13).
5. Place plastic hex-body into vise and
lightly tighten.
6. Carefully remove nozzle from the
nozzleadapterusing5/8"socketwrench
(see Figure 14).
7. Blow compressed air through face of
nozzle.Thiswillfreeanydirtinnozzlearea.
8. Inspect nozzle seal for damage.
9. Replace nozzle into nozzle adapter un-
til nozzle seats. Tighten 1/3 turn more
using 5/8" socket wrench (40-45 inch-
pounds). See Figure 14.
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 (see
page 7).
Fuel Line
Hose
Nozzle/
Adapter
Assembly
Combustion
Chamber
Air Line
Hose
Burner
Strap
Photocell
Bracket
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 airlinehosesforcracks
and/or holes. If fuel line hose is dam-
aged, disconnect from nozzle adapter
(see Figure 12) and from fuel filter (see
page8).If air line hose is damaged, dis-
connect from nozzle adapter (see Fig-
ure 12) and from barb fitting on pump
end cover (see Figure 15).
5. Install new air and/or fuel line. Attach
one end of air line hose to barb fitting
on pump end cover (see Figure 15) and
theotherendtonozzleadapter(seeFig-
ure 12).Attach one end of fuel line hose
to fuel filter (see page 8) and the other
end to nozzle adapter (see Figure 12).
Route air and fuel line approximately
as shown in Figure 12.
Note: Hosesarenottobetouchingpho-
tocell bracket.
6. Replace side cover.
7. Replace upper shell and fan guard (see
page 7).
Figure 15 - Air Hose to Barb Fitting
Barb Fitting
Air Hose
Pump End Cover
Continued

10
104193
PORTABLE FORCED AIR HEATER
115,000 Btu/Hr H.S.I. Series
SERVICE
PROCEDURES
Continued
Sandpaper
.003"/.004"
Gap
Measured
With
Feeler
Gauge
Blade
Rotor
Gap Adjusting Screw
Gap Adjusting Screw
InsertRotor
Air Output
Filter
Blade
Pump Plate
Air Intake Filter
Filter End
Cover
Fan Guard
Figure 16 - Rotor Location
Figure17-GapAdjustingScrewLocations
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 plate screws using 5/16"
nut-driver.
5. Remove pump plate.
6. Remove rotor, insert, and blades.
7. Check for debris in pump. If debris is
found, blow out with compressed air.
8. Install insert and rotor.
9. Check gap on rotor. Adjust to .003"/
.004" if needed (see Figure 17).
Note: Rotate rotor one full turn to 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.
IGNITION CONTROL
ASSEMBLY
(Procedure for Replacing Fuse)
WARNING: High Voltage
1. Unplug heater.
2. Remove side cover screws (4) using
5/16"nut-drivertoexposeignition 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.
Figure 19 - Replacing Fuse
Fuse
Cover
Fuse
Clips
Fuse

11
104193
OWNER’S MANUAL
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.
SPECIFICATIONS
Output Rating (Btu/Hr) 115,000
Fuel Use Only Kerosene or No. 1 Fuel Oil
Fuel Tank Capacity (U.S. Gal.) 9.0
Fuel Consumption (Gal. Per Hr.) .85
Electric Requirements 120 V/60 Hz
Amperage (Normal Run) 3.6
Hot Air Output (CFM) 490
Motor RPM 3440
Motor HP 1/5
Shipping Weight
(Approximate Pounds) 58
Heater Weight without Fuel
(Approximate Pounds) 49
Figure 20 - Wiring Diagram
WIRING DIAGRAM
Blue
Photocell
Power Plug
120V/60Hz
Ignitor
Ignitor
Blue
White
Red
Yellow Yellow
Green
Motor
White
Black
Black
AC Common (L2)
Photocell
Photocell Common
Motor Common
Motor
AC Hot (L1)
Ignitor Common
Ignition Control
Green
Thermostat

12
104193
PORTABLE FORCED AIR HEATER
115,000 Btu/Hr H.S.I. Series
1
2
3
23 19
910
16
11
12
15
25
26
27
24
28
29
20
22
21
30
31
17
14
14
33
34
35
36 32
26
13
18
5
46
7
8
7-2
7-1
7-5
7-4
7-3
40
39
38
ILLUSTRATED
PARTS
BREAKDOWN
B115T
R115T
REM115T
Motor and Pump Assembly
10-11
10-13
10-17
10-16
10-15
10-14
10-13 10-12
10-10
10-1
10-2 10-3
10-410-5
10-6
10-7 10-8
10-9

13
104193
OWNER’S MANUAL
PARTS LIST
B115T
R115T
REM115T
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.
** See OPTIONAL ACCESSORIES
*** Not available as an assembly.
KEY PART
NO. NUMBER DESCRIPTION QTY.
KEY PART
NO. NUMBER DESCRIPTION QTY.
1 098511-138 Upper Shell (Yellow) 1
098511-66 Upper Shell (Black) 1
098511-135 Upper Shell (White) 1
2 100647-01 Screw, #10-16 x 1/2" 8
3 098512-54 Combustion Chamber 1
4 103971-01 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 100735-19 Nozzle Assembly 1
7-2 102548-03 Ignitor Kit 1
7-3 104023-01 Assembly, Screw/Washer 1
7-4 102336-01 Nozzle Adapter Bracket 1
7-5 104054-01 Nozzle Adapter 1
8 M11084-27 Screw, #10-16 x 1/2" 2
9 097293-01 Fan 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 M50820-02 Barb Fitting 1
10-17 M8643** Blade 4
11 M50631 Rubber Bumper 2
12 101206-01 Motor Mounting Bracket 1
13 101695-01 Button Plug 1
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 1
22 M10990-3 Rubber Bushing 1
23 M50814-03 Airline 1
24 098511-279 Lower Shell (Yellow) 1
098511-280 Lower Shell (White) 1
098511-278 Lower Shell (Black) 1
25 M50104-03 Bushing 1
26 M50104-01 Bushing 2
27 M11084-27 Screw, #10-16 x 1/2" 6
28 M11271-8 Clip Nut 8
29 M10908-14 Screw, #8-32 x 3/8" 1
30 098513-87 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 098219-24 Power Cord 1
35 M51077-09AA Side Cover 1
36 M11084-27 Screw, #10-16 x 1/2" 4
37 103814-01 Wire Tie (Not Shown) 1
38 097657-03 Thermostat 1
39 M10908-1 Screw, #6-32 x 1/4” 2
40 104905-01 Thermostat Knob 1
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)

14
104193
PORTABLE FORCED AIR HEATER
115,000 Btu/Hr H.S.I. Series
1
2
3
4
WHEELS AND HANDLE PARTS LIST
KEY PART PART
NO. NUMBER DESCRIPTION QTY.
1 HA2203 Handle 2 (if equipped)
2 M12345-33 Screw, #10-24 x 1 3/4" (B115T) 8
(REM115T, R115T) 6
3 M12342-3 Wheel Support Frame 1
4 NTC-3C Hex Nut, #10-24 (B115T) 8
(REM115T, R115T) 6
5 097896-04 Wheel (Master and Remington) 2
097896-01 Wheel (Reddy) 2
6 M28526 Cap Nut 2
7 M51015-01 Axle 1
PART
NUMBER DESCRIPTION QTY.
100621-06 Thermostat Decal 1
PARTS LIST
5
7
6
PARTS AVAILABLE - NOT SHOWN

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104193
OWNER’S MANUAL
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,wewillaskyoutoreturnthe 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),callDESAInternational’sParts De-
partment at 1-800-972-7879 for referral in-
formation. Parts Centrals are listed in the
AuthorizedServiceCenterbookletsupplied
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.
A 008
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
1-800-972-7879
Parts Department

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
willbeinspected.Adefectmaybecausedbyfaultymaterialsorworkmanship.Ifso,DESAInternationalwillrepairorreplacetheheaterwithoutcharge.
REPAIR SERVICE
Returntheheatertoyournearestauthorizedservicecenter.EachServiceCenterisindependentlyownedandoperated.Wereservetherighttoamend
these specifications at any time without notice. Repairs not covered by the warranty will be billed at standard prices. When writing for information
regarding your heater, be sure to include the model number and serial number as shown on the model plate.
For more information about this warranty write:
Corporate Headquarters
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
www.desatech.com
ATTN: Customer Service Department
When writing, always include model number and serial number.
LIMITED WARRANTY
DESA International warrants this product and any parts thereof, to be free from defects in materials and workmanship for one (1) year from
the date of first 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.
Thiswarrantycoversonlythecostofpartsandlaborrequiredtorestoretheproducttoproperoperatingcondition.Transportationandincidental
costs associated with warranty repairs are not reimbursable under this warranty.
Warranty service is available only through authorized dealers and service centers.
Thiswarranty doesnot coverdefects resultingfrommisuse,abuse,negligence, accidents,lack ofproper maintenance,normal wear,alteration,
modification,tampering, contaminatedfuels, repairusing improperparts,orrepairby anyoneother thanan authorizeddealer orservicecenter.
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.
Model No.
Serial No.
Date of Purchase
(To be filled in by purchaser)
KEEP THIS WARRANTY
104193-01
Rev. E
10/99
INTERNATIONAL
NOT A UPC
104193 01