Page 1
PORTABLE
FORCED
AIR HEATER
OWNER’S MANUAL
Heater Size: 70,000 Btu/Hr
Models: R70D and B70D
H.S.I. Series
IMPORTANT: Read and understand this manual before assembling, starting,
or servicing heater. Improper use of heater can cause serious injury. Keep this
manual for future reference.
®
ARL LOGO
G 004
Page 2
70,000 Btu/Hr H.S.I. Series
PORTABLE FORCED AIR HEATERS
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. Ne ver use
gasoline, naphtha, paint thinners, alcohol, or other highly flammable fuels.
• Fueling
a) Personnel involv ed 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. An y 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 v apors
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.
• 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 accordance with applicable New York City
Codes, Regulations, Rules, Directives,
Permits, etc.
2
103685
Page 3
OWNER’S MANUAL
PRODUCT IDENTIFICATION
Hot Air Outlet
Lower Shell
Fuel Tank
Side Cover
Ignition Control Assembly
(assembly on inside of side cover)
Power Cord
Figure 1 - 70,000 Btu/Hr
Handle
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
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
system causes the heater to shut down if the
flame goes out.
Motor
Fan
Upper Shell
Fan Guard
Air Filter
End Cover
Air Pump
Air Intake
Filter
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.
Fuel Cap
Clean
Heated
Air Out
Fuel
Tank
Figure 2 - Cross Section Operational View
103685
Nozzle
Air For Fuel System
Fuel
Filter
Air Line
To Burner
Air For Combustion
And Heating
Cool
Air In
Air
Output
Filter
Ignition Control
Assembly
Fuel
3
Page 4
70,000 Btu/Hr H.S.I. Series
PORTABLE FORCED AIR HEATERS
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:
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.
Use a KEROSENE ONLY
VENTILATION
Follow the minimum fresh,
outside air ventilation requirements. If proper fresh, outside air
ventilation is not provided, carbon monoxide poisoning can
occur. Provide proper fresh, outside air ventilation before running heater.
Provide at least a three-square-foot opening
of fresh, outside air for each 100,000 Btu/Hr
rating. Provide extra fresh air if more heaters are being used.
Example:
one of the following:
• a two-car garage door (16 feet wide opening) raised two inches
• a single-car garage door (9 feet wide
opening) raised three inches
• two windows (30 inches wide opening)
raised six inches
A 70,000 Btu/Hr heater requires
OPERATION
WARNING: Review and un-
derstand the warnings in the
Safety Information
2. They are needed to safely operate this heater. Follow all local
codes when using this heater.
TO START HEATER
1. Follow all ventilation and safety infor mation.
2. Fill fuel tank with kerosene or No. 1
fuel oil.
3. Attach fuel cap.
4. Plug power cord of heater into threeprong, grounded extension cord. Extension cord must be at least six feet long.
Extension Cord Wire Size Requirements
• 6 to 10 feet long, use 18 AWG rated
cord
• 11 to 100 feet long, use 16 AWG
rated cord
• 101 to 200 feet long, use 14 AWG
rated cord
5. Plug extension cord into standard 120 volt/
60 hertz, three-hole, grounded outlet.
Note: Ignitor will preheat for five seconds then heater will start.
section, page
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. Plug extension cord into standard 120 volt/
60 hertz, three-hole, grounded outlet.
Note:
Ignitor will preheat for five sec-
onds then heater will start.
4
103685
Page 5
OWNER’S MANUAL
STORING,
TRANSPORTING,
OR SHIPPING
Note:
If shipping, transport companies re-
quire fuel tanks to be empty.
1. Drain fuel tank. Drain fuel through fuel
cap opening. Be sure all fuel is removed.
2. If any debris is noted in old fuel, add 1
or 2 quarts of clean kerosene to tank,
stir, and drain again. This will prevent
excess debris from clogging filters during future use.
3. Replace fuel cap. Properly dispose of old
and dirty fuel. Check with local automotive service stations that recycle oil.
4. If storing, store heater in dry place.
Make sure storage place is free of dust
and corrosive fumes.
IMPORTANT:
summer months for use during next heating
season. Using old fuel could damage heater.
Do not store kerosene over
PREVENTATIVE MAINTENANCE SCHEDULE
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 and water
every 500 hours of operation or replace as needed.
Clean twice a heating season or replace as needed.
No maintenance required.
Clean each season or as needed.
Not required/permanently lubricated
How To
See Storing, Transporting, or
Shipping
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
103685
5
Page 6
70,000 Btu/Hr H.S.I. Series
PORTABLE FORCED AIR HEATERS
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
WARNING: High voltage!
2. Bad electrical connection between motor and ignition control assembly or ignition control assembly and power cord
3. Blown fuse on ignition control assembly
4. Binding pump rotor
5. Defective ignition control assembly
6. Defective motor
1. No fuel in tank
2. Pump pressure incorrect
3. Dirty fuel filter
4. Obstruction in nozzle
5. Water in fuel tank
REMEDY
1. Check circuit breaker in electrical panel
2. Check all electrical connections. See
Wiring Diag ram, page 11
3. See Ignition Control Assembly, page 8
4. If fan does not turn freely, see Pump
Rotor, page 10
5. Replace ignition control assembly
6. 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 5
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
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
www.desatech.com
6. Check electrical connections. See Wiring 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
6
103685
Page 7
OWNER’S MANUAL
SERVICE
PROCEDURES
WARNING: Never service
heater while it is plugged in, operating, or hot. Severe burns and
electrical shock can occur.
UPPER SHELL REMOVAL
1. Remove screws along each side of
heater using 5/16" nut-driver. These
screws attach upper and lower shells
together.
2. Lift upper shell off.
3. Remove fan guard.
Upper Shell
Fan Guard
Figure 3 - Upper Shell Removal
FAN
IMPORTANT:
before removing motor from heater. The
weight of the motor resting on the fan could
damage the fan pitch.
Remove fan from motor shaft
Fan
Motor
Flush
Motor
Shaft
Setscrew
Figure 4 - Fan Cross Section
AIR OUTPUT, AIR INTAKE,
AND LINT FILTERS
1. Remove upper shell (see Upper Shell
Removal).
2. Remove filter end cover screws using
5/16" nut-driver.
3. Remove filter end cover.
4. Replace air output and lint filters.
5. Wash or replace air intake filter (see
Preventative Maintenance Schedule,
page 5).
6. Replace filter end cover.
7. Replace fan guard and upper shell.
IMPORTANT:
Do not oil filters.
Air Intake Filter
Filter End Cover
Fan Guard
PUMP PRESSURE
ADJUSTMENT
1. Remove pressure gauge plug from filter
end cover.
2. Install accessory pressure gauge (part
number HA1180).
3. Start heater (see Operation, page 4).
Allow motor to reach full speed.
4. Using a flat blade screwdriver, adjust
pressure. Turn relief valve to right to
increase the pressure. T urn relief valve
to left to decrease the pressure. Set
pump pressure at 4.7 PSI.
5. Stop heater (see Operation, page 4).
6. Remove pressure gauge. Replace pressure gauge plug in filter end cover.
Pressure
Gauge
Plug
Figure 6 - Pressure Gauge Plug Removal
Pressure
Gauge
Relief Valve
1. Remove upper shell (see Upper Shell
Removal).
2. Use 1/8" Allen wrench to loosen setscrew which holds fan to motor shaft.
3. Slip fan off motor shaft.
4. Clean fan using soft cloth moistened
with kerosene or solvent.
5. Dry fan thoroughly.
6. Replace fan on motor shaft. Place fan
hub flush with end of motor shaft (see
Figure 4).
7. Place setscrew on flat of shaft. T ighten
setscrew firmly (40-50 inch-pounds).
8. Replace fan guard and upper shell.
103685
Lint Filter
Air Output Filter
Figure 5 - Air Output, Air Intake, and Lint
Filters
7
Figure 7 - Adjusting Pump Pressure
Continued
Page 8
70,000 Btu/Hr H.S.I. Series
PORTABLE FORCED AIR HEATERS
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 4 side cover screws using
5/16" nut-driver.
2. Remove side cover.
3. Pull upper fuel line off fuel filter neck.
4. Carefully pry bushing and fuel filter out
of fuel tank.
5. W ash fuel filter with clean fuel and replace in tank.
6. Attach upper fuel line to fuel filter neck.
7. Replace side cover.
Fuel Filter
Side Cover Upper Fuel Line
Figure 8 - 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 8).
4. Disconnect ignitor wires (yellow) from
ignition control assembly (see Figure
9). Pull the ignitor wires up through the
hole in the lower shell.
5. Disconnect fuel line hose and air line
hose. Remove photocell from photocell
bracket (see Figure 9).
6. Remove combustion chamber. Stand
combustion chamber on end with
nozzle adapter bracket on top (see Figure 10).
7. Remove ignitor screw with a 1/4" nut
driver. Carefully remove ignitor from
nozzle adapter bracket.
CAUTION: Do not bend or strike
ignitor element. Handle with care.
8. Carefully remove replacement ignitor
from styrofoam packing.
9. Carefully guide ignitor into opening in
nozzle adapter bracket. Do not strike ignitor element. Attach ignitor to nozzle
adapter bracket with screw using a 1/4"
nut driver (see Figure 10). T orque 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 8).
13. Connect and route fuel line hose and air
line hose to nozzle adapter (see Figure 9).
14. Replace photocell in photocell bracket.
Route wires as shown in Figure 12,
page 9.
15. Replace fan (see page 7).
16. Replace fan guard and upper shell (see
page 7).
Combustion
Chamber
Air Line
Hose
Fuel
Line
Hose
Photocell
Bracket
Photocell
Assembly
Side Cover
Figure 9 - Disconnecting Ignitor Wires
from Ignition Control Assembly
Nozzle Adapter Bracket
Ignitor
Ignitor
Wires
Ignition
Control
Assembly
Ignitor Screw/
Washer
Assembly
Ignitor
Ignitor
Photocell
Bracket
Combustion
Chamber
Figure 10 - Ignitor Replacement
Element
Nozzle Adapter
Bracket
Nozzle Adapter
Bracket Opening
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.
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 11 - Replacing Fuse
Fuse
Cover
Fuse
8
103685
Page 9
OWNER’S MANUAL
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 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
nozzle adapter using 5/8" socket
wrench (see Figure 14).
7. Blow compressed air through face of
nozzle. This will free any dirt in
nozzle area.
8. Inspect nozzle seal for damage.
9. Replace nozzle into nozzle adapter until nozzle seats. Tighten 1/3 turn more
using 5/8" socket wrench (40-45 inchpounds).
10. Attach nozzle assembly to burner strap.
11. Attach and route fuel and airline hoses
to nozzle assembly as shown (see Figure 12). Route photo cell wires as
shown in Figure 12.
12. Replace fan (see page 7).
13. Replace fan guard and upper shell.
Combustion
Chamber
Nozzle/
Adapter
Assembly
Figure 13 - Removing Nozzle/Adapter
Assembly
Nozzle
Face
Nozzle
Seal
Nozzle
Nozzle
Adapter
Air Line
Fitting
Figure 14 - Nozzle and Nozzle Adapter
Fuel Line
Fitting
FUEL AND AIR LINE
REPLACEMENT AND
PROPER ROUTING
1. Remove upper shell (see Upper Shell
Removal, page 7).
2. Remove side cover scr ews using 5/16"
nut driver (see Figure 8, page 8).
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 12) and from fuel filter (see Fuel F il-
ter, page 8). If air line hose is damaged,
disconnect from nozzle adapter (see Figure 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
the other end to nozzle adapter (see
Figure 12). Attach one end of fuel line
hose to fuel filter (see Fuel Filter, pa ge
8) and the other end to nozzle adapter
(see Figure 12). Route air and fuel line
approximately as shown in Figure 12.
Note:
Route hoses as shown in Figure
12. Hoses are not to touch photocell
bracket.
6. Replace side cover.
7. Replace upper shell and fan guard (see
Upper Shell Removal, page 7).
Pump End Cover
Combustion
Chamber
Burner
Strap
Nozzle/
Adapter
Assembly
Fuel Line
Air Line
Hose
Figure 12 - Removing Air and Fuel Line
Hoses
103685
Hose
Photocell
Wires
Barb Fitting
Air Hose
Figure 15 - Air Hose to Barb FItting
Continued
9
Page 10
70,000 Btu/Hr H.S.I. Series
PORTABLE FORCED AIR HEATERS
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.
4. Remove pump plate screws using 5/16"
nut-driver .
5. Remove pump plate.
6. Remove rotor, insert, and blades.
7. Check for debris in pump. If debris is
found, blow out with compressed air.
8. Install insert and rotor.
9. Check gap on rotor. Adjust to .003"/
.004" if needed (see Figure 17).
Note:
Rotate rotor one full turn to insure the gap is .003"/.004" at tightest
position. Adjust if needed.
10. Install blades, pump plate, air filters,
and filter end cover.
11. Replace fan guard and upper shell.
12. Adjust pump pressure (see page 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 18).
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
OR
Figure 16 - Rotor Location
Gap Adjusting Screw
Blade
Gap Adjusting Screw
Figure 17 - Gap Adjusting Screw
Locations
Filter
PFA/P 056
Fan Guard
.003"/.004"
Gap
Measured
With
Feeler
Gauge
Rotor
Sandpaper
REPLACEMENT
PARTS
Note:
Use only original replacement parts.
This will protect your warranty coverage for
parts replaced under warranty.
PARTS UNDER WARRANTY
Contact authorized dealers of this product.
If they can’t supply original replacement
part(s), call DESA International’s Technical Service Dept. at 1-800-323-5190.
When calling DESA International, have
ready:
• your name
• your address
• model number of your heater
• how heater was malfunctioning
• purchase date
Usually, we will ask you to return the defec-
tive part to the factory.
PARTS NOT UNDER
WARRANTY
Contact authorized dealers of this product.
If they can’t supply original replacement
part(s), call DESA International’s Parts
Department at 1-800-972-7879 for referral
information. Parts Centrals are listed in the
Authorized Service Center booklet supplied
with heater.
When calling DESA International, have
ready:
• model number of your heater
• the replacement part number
TECHNICAL
Figure 18 - Sanding Rotor
10
SERVICE
You may have further questions about operation or troubleshooting. If so, contact
DESA International’s Technical Service
Dept. at 1-800-323-5190.
You can also visit DESA International’s
technical services web site at
www.desatech.com.
103685
Page 11
OWNER’S MANUAL
SPECIFICATIONS
Output Rating (Btu/Hr) 70,000
Fuel Use Only Kerosene or No. 1 Fuel Oil
Fuel Tank Capacity (U.S. Gal.) 5.0
Fuel Consumption (Gal. Per Hr.) .52
Electric Requirements 120 V/60 Hz
Amperage (Normal Run) 2.8
Hot Air Output (CFM) 360
Motor RPM 3440
Motor HP 1/8
Shipping Weight
(Approximate Pounds) 36
Heater Weight without Fuel
(Approximate Pounds) 31
ACCESSORIES
Purchase accessories and parts from your
nearest dealer or service center. If they can
not supply these accessories or parts, either
contact your nearest Parts Central or DESA
International for referral information. Parts
Centrals are listed in the Authorized Service
Center booklet supplied with heater.
DESA International
P.O. Box 90004
Bowling Green, KY
42102-9004
1-800-972-7879
Parts Department
WIRING DIAGRAM
Ignitor
Yellow
Power Plug
120V/60Hz
Green
Figure 19 - Wiring Diagram
Black
White
Photocell
A 008
IGNITION CONTROL
ASSEMBLY/PHOTOCELL
TESTER - HA1170
Special tool used to test the ignition control
assembly and photocell.
Yellow
Red
Motor
Ignitor
Motor
Green
Ignition Control
Assembly
AC Hot (L1)
AC Neutral (L2)
White
Blue
Blue
STANDARD WHEELS AND
HANDLE KIT - HA1206
Makes heater even more portable and convenient. Easy to assemble.
Motor Return
Ignitor
Photocell
Photocell
AIR GAUGE KIT - HA1180
Special tool to check pump pressure.
103685
HEAVY DUTY WHEELS AND
HANDLE KIT - HA1202
For heavy duty applications. Makes your
heater even more portable and convenient.
11
THERMOSTAT KIT - HA1210
Keeps your building at the temperature you
select day and night. Helps economize on fuel.
Page 12
70,000 Btu/Hr H.S.I. Series
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
9-2
9-1
9-3
9-4
9-5
17
18
19
20
21
22
23
24
25
26
27
28
29
30
34
35
36
32
33
31
PORTABLE FORCED AIR HEATERS
ILLUSTRATED
PARTS
BREAKDOWN
R70D
B70D
12-18
Motor and Pump Assembly
12-1
12-2
12-17
12-16
12-4
12-5
12-6
12-13
12-3
12-15
12-14
12-12
12-7
12-8
12-9
12-10
12-11
12
103685
Page 13
OWNER’S MANUAL
PARTS LIST
R70D
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.
B70D
KEY PART
NO. NUMBER DESCRIPTION QTY.
1 M51104-01 Handle 1
2 098511-36 Upper Shell (R70D) 1
098511-54 Upper Shell (B70D) 1
3 M11084-29 Screw, #10-16 x 3/4" 2
4 100647-01 Screw, #10-16 x 1/2" 6
5 098512-51 Combustion Chamber 1
6 M10908-2 Screw, #6-32 x 3/8" 2
7 103154-03 Photocell Bracket 1
8 M16656-23 Photocell Assembly 1
9 ∆ Burner Head Assembly 1
9-1 100735-18 Nozzle Assembly 1
9-2 102548-03 Ignitor Kit 1
9-3 104056-01 Nozzle Adapter 1
9-4 102336-01 Nozzle Adapter Bracket 1
9-5 104023-01 Screw/Washer Assembly 1
10 M11084-26 Screw, #10-16 x 3/8" 2
11 M29678 Fan 1
12 ∆ Motor and Pump Assembly 1
12-1 102001-20 Motor 1
12-2 079975-02 Pump Body 1
12-3 M22009** Insert 1
12-4 M22456-1** Rotor 1
12-5 M29608 Pump End Cover 1
12-6 M29632 ⊕ Lint Filter 1
12-7 M29633 ⊕ Intake Filter 1
12-8 M29609 Filter End Cover 1
12-9 M12461-31 Screw, #10-32 x 1" 3
12-10 M27694 ∞ Adjusting Screw 1
12-11 M10993-1 ∞ Pressure Relief Spring 1
12-12 M22997 ∞ Plug 1
12-13 M8940 ∞ Steel Ball, 1/4" Diameter 1
12-14 M29612-01 ⊕ Output Filter 1
12-15 M12461-31 Screw, #10-32 x 1" 6
12-16 103676-01 Nylon Elbow, 90° 1
KEY PART
NO. NUMBER DESCRIPTION QTY.
12-17 M8643** Blade 4
12-18 FHPF3-5C Screw, #10-32 x 5/8" 2
13 M51105-01 Fan Guard 1
14 098219-31 Power Cord 1
15 M11143-1 Strain Relief Bushing 1
16 NTC-4C Hex Lock Nut, 1/4-20 2
17 M11084-26 Screw, #10-16 x 3/8" 4
18 M50631 Rubber Bumper 2
19 097461-03AA Side Cover 1
20 101205-01 Motor Bracket 1
21 M30865-02 Bushing 2
22 M11271-8 Clip Nut 6
23 M50104-02 Bushing 1
24 M11084-26 Screw, #10-16 x 3/8" 6
25 M10908-14 Screw, #8-32 x 3/8" 1
26 098511-18 Lower Shell (R70D) 1
098511-12 Lower Shell (B70D) 1
27 M50814-06 Rubber Airline 1
28 079973-01 Fuel Line 1
29 M50876-05 Fuel Filter (with bushing) 1
30 M10990-3 Rubber Bushing 1
31 101695-01 Button Plug 1
32 102349-01 PCB Support 5
33 104068-02 Ignition Control Assembly 1
34 097702-01 Fuel Cap (Includes Gasket) 1
35 098513-62 Fuel Tank 1
36 M51108-01 Shell Heat-Shield 1
PARTS AVAILABLE - NOT SHOWN
097204-03 Tradename Decal (R70D) 2
097646-02 Tradename Decal (B70D) 2
098493-01 General Information Decal 1
103814-01 Wire Tie 1
∆ Not available as an assembly
** Included in Rotor Kit (part No. HA3004)
⊕ Included in Filter Kit (Part No. HA3014)
∞ Included in Pump Adjustment Kit (Part
No. HA3020)
103685
13
Page 14
WARRANTY AND REPAIR SERVICE
LIMITED WARRANTY
DESA International warrants this product and any parts thereof, to be free from defects in materials and workmanship for one (1) year from
the date of first purchase when operated and maintained in accordance with instructions. This warranty is extended only to the original retail
purchaser, when proof of purchase is provided.
This warranty covers only the cost of parts and labor required to restore the product to proper operating condition. Transportation and
incidental costs associated with warranty repairs are not reimbursable under this warranty.
Warranty service is available only through authorized dealers and service centers.
This warranty does not cover defects resulting from misuse, abuse, negligence, accidents, lack of proper maintenance, normal wear,
alteration, modification, tampering, contaminated fuels, repair using improper parts, or repair by anyone other than an authorized dealer or
service center. Routine maintenance is the responsibility of the owner.
THIS EXPRESS WARRANTY IS GIVEN IN LIEU OF ANY OTHER WARRANTY EITHER EXPRESSED OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
DESA International assumes no responsibility for indirect, incidental or consequential damages. Some states do not allow the exclusion or
limitation of incidental or consequential damages or limitations or exclusions may not apply to you. This Limited Warranty gives you specific
legal rights and you may also have other rights which vary from state to state.
WARRANTY SERVICE
Should your heater require service, return it to your nearest authorized service center. Proof of purchase must be presented with the heater. The
heater will be inspected. A defect may be caused by faulty materials or workmanship. If so, DESA International will repair or replace the heater
without charge.
REPAIR SERVICE
Return the heater to your nearest authorized service center. Each Service Center is independently owned and operated. Repairs not covered by the
warranty will be billed at standard prices. When writing for information regarding your heater, be sure to include the model number and serial
number as shown on the model plate. We reserve the right to amend these specifications at any time without notice.
Illustrated parts lists can be obtained free of charge. Send a self addressed stamped envelope to the address listed below. List the heater model number
and the date located in the lower right corner of this page. A service manual may be purchased from the address listed below. Send a check for $5.00
payable to DESA International.
KEEP THIS WARRANTY
Model No.
Serial No.
Date of Purchase
(To be filled in by purchaser)
Corporate Headquarters
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
www.desatech.com
103685 01
NOT A UPC
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.
103685-01
Rev. E
02/99
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