Desa 50 User manual

OWNER’S MANUAL
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.
CANADIAN
PORTABLE
FORCED
AIR HEATERS
50 SIDE PFA/PV 010A
Models: 35, 50, 70, 100, and 150
This heater is certified by the Canadian Gas Association to Canadian
Standards Specifications B140.0 and B140.8.

2
099618
Safety Information......................................................................... 3
Product Identification .................................................................... 4
Unpacking......................................................................................5
Assembly .......................................................................................5
35, 50, and 70 Models............................................................. 5
100 and 150 Models................................................................ 6
Theory of Operation ...................................................................... 7
Fuels .............................................................................................. 8
Ventilation ..................................................................................... 8
Operation .......................................................................................8
Storing, Transporting, or Shipping ................................................ 10
Preventative Maintenance Schedule.............................................. 10
Troubleshooting.............................................................................11
Service Procedures ........................................................................ 12
Upper Shell Removal .............................................................. 12
Fan........................................................................................... 12
Air Output, Air Intake, and Lint Filters .................................. 12
Pump Pressure Adjustment .....................................................13
Fuel Filter ................................................................................ 13
Spark Plug (35/50 Models) ..................................................... 14
Spark Plug (70/100/150 Models) ............................................14
Nozzle (35/50 Models) ........................................................... 15
Nozzle (70/100/150 Models) ..................................................15
Pump Rotor .............................................................................16
Specifications ................................................................................ 17
Wiring Diagrams ........................................................................... 18
Accessories .................................................................................... 19
Illustrated Parts Breakdown and Parts List ................................... 20
35 Model ................................................................................. 20, 21
50 Model ................................................................................. 22, 23
70 Model ................................................................................. 24, 25
100 Model ............................................................................... 26, 27
150 Model ............................................................................... 28, 29
Warranty and Repair Service.........................................................30
SECTION PAGE
CONTENTS
Install heater according to local regulations and
CSA standard B139.

3
099618
SAFETY
INFORMATION 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.
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 (such as
pregnant women, persons with heart or lung disease, persons with anemia, those
under the influence of alcohol, and those at high altitudes) are more affected by
carbon monoxide than others.
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.
• Use only with the electrical voltage and frequency specified on model plate.
• Heater must be grounded. Use only a properly grounded three-wire extension
cord. Plug into grounded outlet only.
• Use only in areas free of flammable vapors or high dust content.
• Minimum clearance from any combustible materials: 8 feet (244 cm) from hot
air outlet; 6 feet (183 cm) from top; and 2 feet (61 cm) from sides and inlet.
• Locate heater on a stable and level surface while hot or operating or a fire may
occur.
• Useonly inwell ventilatedareas. Provideventilation ofat leastthree squarefeet
(2,800 square cm) for each 100,000 Btu of rating.
• Keep children and animals away from heater at all times.
• Never start heater when combustion chamber is hot or if fuel has
accumulated in combustion chamber.
• When used with a thermostat, heater may start at anytime.
• Whenheaterismovedorstored,itmustbeinalevelpositionorfuelspillagemay
occur.
• Use heater only in accordance with local ordinances and codes.
• Never use gasoline, crankcase drainings, naphtha, paint thinners, alcohol, or
other highly flammable fuels.
• Neveruseheaterwheregasoline,paintthinner,orotherhighlyflammablevapors
are present.
• Never use heater in living or sleeping areas.
• Never leave a heater plugged in without adult supervision if children or animals
are likely to be present.
• Never move, handle, refuel, or service a hot, operating, or plugged-in heater.
• Never block air inlet at motor end (rear) of heater.
• Never attach duct work to front of heater.
• Never attach heater to external fuel tank.
WARNINGS
DANGER
Carbon monoxide poisoning may lead to death!

4
099618
PRODUCT
IDENTIFICATION
Side Cover
Fuel Tank
Lower
Shell
Fuel Cap
Power Cord
Upper Shell
Figure 2 - 100/150 Models
35/70,000 BTU/HR CANADIAN PFA/PV 042A
Safety Control
Reset Button
Side Cover
Fuel Tank
Lower Shell
Hot Air Outlet
Nose Cone Guard
Handle
Upper Shell
Figure 1 - 35/50/70 Models
Power Cord
Fuel Cap
Air Filter
End Cover
Fan Guard
Hot Air
Outlet
Safety Control
Reset Button
Fan Guard

5
099618
1. Remove all protective packaging that has been applied to heater for shipment
2. Remove heater from carton.
3. Check heater for any shipping damage. If damage is found, promptly inform
dealer where heater was purchased.
ASSEMBLY PFA/PV 042B
These models are furnished with a nose cone guard. Nose cone guard and
mounting screws are found in the shipping carton.
ASSEMBLY
(For 35, 50, and 70
Models Only) Tools Needed
• 5/16" Nut Driver or Wrench
1. Place nose cone guard on top of upper shell flange. Make sure nose cone guard
is on hot air outlet end of heater.
2. Insert screws through nose cone guard and upper shell flange.
3. Tighten screws firmly.
Nose Cone Guard
Screw
UNPACKING
Hot Air Outlet
Upper Shell
Flange
Figure 3 - Nose Cone Guard Assembly, 35/50/70 Models Only

6
099618
These models are furnished with wheels and a front handle. Some models are
furnished with a rear handle also. Wheels, handle(s), and the mounting hardware is
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: Place extended hub of wheel toward wheel support frame.
2. Place cap nuts on axle ends. Gently tap with hammer to secure.
3. Place heater on wheel support frame assembly. Make sure air inlet end of
heater is over wheels.
4. Place front handle (and rear 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. Tighten all nuts firmly.
Hot Air
Outlet
ASSEMBLY
(For 100 and 150 Models Only)
Wheel
Support
Frame
Wheel
Axle
Fuel
Tank
Flange
Extended
Hub
Air Inlet
Screw
Front
Handle Rear
Handle
Nut
Cap Nut
Figure 4 - Wheel and Handle Assembly, 100/150 Models Only

7
099618
Fuel
Filter
Air For Fuel
System Air For Combustion And Heating Fuel
Spark
Plug
Combustion
Chamber
Cool
Air
In
Clean
Heated
Air Out
Output
Air
Filter
The Fuel System: An air pump is located on one end of the motor shaft. The
air pump forces air through the air line. The air is then pushed through the burner
head nozzle. The moving air causes fuel to be lifted from the tank. The fuel and air
mixture is sprayed into the combustion chamber in a fine mist.
The Air System: The motor turns a fan which pushes air into and around the
combustion chamber. This air is heated and provides a stream of clean, hot air.
The Ignition System: The electronic ignitor causes the spark plug to ignite the
fuel and air mixture.
The Safety Control System: This system causes the heater to shut down if the
flame goes out.
THEORY OF
OPERATION
Figure 5 - Cross Section Operational View
Burner
Head Fan Intake
Air
Filter
Air Pump
Motor
Air Line
To Burner
Fuel
Tank Nozzle Electronic
Ignitor

8
099618
Use only kerosene or No. 1 fuel oil. Do not use heavy fuels such as No. 2 fuel oil
or No. 2 diesel. The use of heavy fuels will result in:
• clogging of fuel filter and nozzle
• carbon build up on spark plug
• the need of non-toxic anti-icer in fuel during very cold weather
Do not use No. 3 fuel oil or heavy oils such as crankcase drainings. These heavy
oils will not ignite properly and will contaminate the heater.
IMPORTANT: Use a KEROSENE ONLY storage container. Be sure storage
container is clean. Foreign matter such as rust, dirt or water will cause the heater’s
safety control to shut down heater. Foreign matter may also require heater’s fuel
system to be frequently cleaned.
To Start Heater
1. Fill fuel tank with kerosene or No. 1 fuel oil.
2. Attach fuel cap.
3. Follow all ventilation and safety information.
Example: A 150 model heater requires one of the following:
• a two-car garage door raised six inches (15.24 cm)
• a single-car garage door raised nine inches (22.86 cm)
• two, thirty-inch (76.20 cm) windows raised twelve inches (30.48 cm)
FUELS WARNING
Use only kerosene or No. 1 fuel oil to avoid risk of fire or
explosion. Never use gasoline, crankcase drainings, naph-
tha, paint thinners, alcohol, or other highly flammable fuels.
WARNING
Provide a fresh air opening of at least one square foot (930
square cm) for each 35,000 BTU/HR rating. Provide extra
fresh air if more heaters are being used. The minimum
ventilation requirements must be followed to avoid risks
associated with carbon monoxide poisoning. Make certain
these requirements are met prior to operating heater.
VENTILATION
OPERATION IMPORTANT
Review and understand the warnings in the Safety Information Section.
They are needed to safely operate this heater. Follow all local ordinances
and codes when using this heater.

9
099618
4. Plug heater’s power cord into approved, grounded, three-wire extension cord.
Extension cord must be at least six feet (1.8 meters) long.
Extension Cord Size Requirement
6 to 10 feet (1.8 to 3 meters) long, use 18 AWG (0.75 mm2) rated cord
11 to 100 feet (3.3 to 30.5 meters) long, use 16 AWG (1.0 mm2) rated cord
101 to 200 feet (30.8 to 61 meters) long, use 14 AWG (1.5 mm2) rated cord
5. Plug extension cord into standard 120 volt/60 hertz, 3-prong grounded outlet.
Heater will start when extension cord is plugged into outlet. If not, push in
heater’s safety control reset button (see Figures 6 and 7).
Figure 6 - Safety Control Reset
Button, 35/50/70 Models Figure 7 - Safety Control Reset
Button, 100/150 Models
To Stop Heater
1. Unplug extension cord from outlet.
To Restart Heater
1. Wait two minutes after stopping heater.
2. Repeat steps under To Start Heater.
Safety
Control
Reset
Button
Safety
Control
Reset
Button
OPERATION
Continued

10
099618
Note: If shipping, transport companies require fuel tanks to be empty.
1. Drain fuel tank.
Note: Some models have drain plug on underside of fuel tank. If so, remove
drain plug to drain all fuel. If heater does not have drain plug, drain fuel
through fuel cap opening. Be sure all fuel is removed.
2. Replace drain plug if provided.
3. If any debris is noted in old fuel, add 1 or 2 quarts of clean kerosene to tank,
stir, and drain again. This will prevent excess debris from clogging filters
during future use.
4. Replace fuel cap or drain plug. Properly dispose of old and dirty fuel. Check
with local automotive service stations that recycle oil.
5. If storing, store heater in dry place. Make sure storage place is free of dust and
corrosive fumes.
IMPORTANT: Do not store kerosene over summer months for use during next
heating season. Using old fuel could damage heater.
WARNING
To avoid risk of burn and electrical shock, never attempt to
service heater while it is plugged in, operating, or hot.
PREVENTATIVE
MAINTENANCE
SCHEDULE
STORING,
TRANSPORTING ,
OR SHIPPING
Item How Often How To
Fuel tank Flush every 150-200 hours See Storing, Transporting, or
of operation or as needed. Shipping, above.
Air output and Replace every 500 hours of See Air Output, Air Intake,
lint filters operation or once a year. and Lint Filters, page 12.
Air intake Wash and dry with soap and See Air Output, Air Intake,
filter water every 500 hours of op- and Lint Filters, page 12.
eration or replace as needed.
Fuel filter Clean twice a heating season See Fuel Filter, page 13.
or replace as needed.
Spark plug Clean and regap every 600 See Spark Plug, page 14.
hours operation or replace
as needed.
Fan blades Clean every season or See Fan, page 12.
as needed.
Motor Not required/permanently
lubricated

11
099618
TROUBLE-
SHOOTING WARNING
To avoid risk of burn and electrical shock, never attempt to
service heater while it is plugged in, operating, or hot.
Incorrect pump pressure
Dirty air output, air
intake and lint filters
Dirty fuel filter
Dirt in nozzle
Dirty photocell lens
Defective safety control
Heater ignites, but
safety control shuts
off heater after a
short period of time.
Heater will not
ignite, but motor runs
for a short period of
time.
Incorrect pump pressure
Carbon deposits on spark
plug and/or improper
gap
Dirty fuel filter
Dirt in nozzle
Water in fuel tank
Electronic ignitor not
grounded
Defective electronic
ignitor
WARNING: High voltage!
Solid state relay not
allowed to reset
Binding pump rotor
Motor does not start;
thermostat (if used)
is set to call for heat.
Motor thermal trip out
Motor hums when
heater is plugged in,
fan rotates slowly or
does not turn.
OBSERVED FAULT POSSIBLE CAUSE REMEDY
See Pump Pressure
Adjustment, page 13.
See Air Output, Air Intake
and Lint Filters, page 12.
See Fuel Filter, page 13.
See Nozzle, page 15.
Clean photocell lens.
Replace safety control.
See Pump Pressure
Adjustment, page 13.
See Spark Plug, page 14.
See Fuel Filter, page 13.
See Nozzle, page 15.
Drain and flush fuel tank
with clean kerosene. See
Storing, Transporting,
or Shipping, page 10.
Make sure electronic
ignitor mounting is tight.
Replace electronic ignitor.
Wait two minutes before
trying to restart heater.
If fan is hard to turn, see
Pump Rotor, page 16.
Wait for motor to cool
down. It will reset
automatically.

12
099618
Fan Guard
Upper Shell
WARNING
To avoid risk of burn and electrical shock, never attempt
to service heater while it is plugged in, operating or hot.
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.
SERVICE
PROCEDURES
Air Output
Filter
Lint Filter
Air Output
Filter
Lint Filter
Air Intake
Filter Filter End
Cover Fan
Guard
Figure 11 - Air Output, Air Intake,
and Lint Filters, 35/50/70 Models Figure 12 - Air Output, Air Intake,
and Lint Filters, 100/150 Models
Filter End
Cover
Air Intake
Filter
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
setscrews which holds fan to motor
shaft.
3. Slip fan off motor shaft.
4. Clean fan using a 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 10).
7. Place setscrews on flat of shaft.
Tighten setscrews firmly (40-50
inch-pounds/4.5-5.6 n-m).
8. Replace fan guard and upper shell.
Fan
Motor
Shaft
Figure 10 - Fan Cross Section
Fan
Setscrews
Motor
Shaft
Figure 9 - Fan, Motor Shaft,
and Setscrew Location
Setscrews
Air Output, Air Intake and
Lint Filters
1. Remove upper shell (see above).
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 10).
6. Replace filter end cover.
7. Replace fan guard and upper shell.
IMPORTANT: Do not oil filters.
Fan Guard
Figure 8 - Upper Shell Removal
Flush

13
099618
Relief
Valve
Pressure
Gauge
Plug
(35/50/70 Models Shown)
Figure 13 - Pressure Gauge Plug Removal
Pump
Model Pressure
35 3 PSI
50 3.6 PSI
70 4 PSI
100 4 PSI
150 5 PSI
Pressure
Gauge
Figure 14 - Adjusting Pump Pressure
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 8).
Allow motor to reach full speed.
4. Adjust pressure. Turn relief valve to
right to increase pressure. Turn
relief valve to left to decrease
pressure. See specifications at right
for correct pressure for each model.
5. Remove pressure gauge. Replace
pressure gauge plug in filter end
cover.
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 (see Figure 15).
4. Carefully pry bushing, fuel filter,
and lower fuel line (100/150
models only) out of fuel tank (see
Figure 16).
5. Wash fuel filter with clean fuel and
replace in tank.
6. Attach upper fuel line to fuel filter
neck.
7. Replace side cover.
35/70 FUEL FILTER REMOVAL PFA/P 037A
Side Cover
Figure 15 - Fuel Filter Removal, 35/50/70 Models
Fuel Filter
Side Cover
Upper Fuel Line
Figure 16 - Fuel Filter Removal, 100/150 Models
Fuel Filter, Bushing,
and Lower Fuel Line
Upper
Fuel
Line

14
099618
Spark Plug
(35/50 Models)
1. Remove upper shell (see page 12).
2. Remove fan (see page 12).
3. Remove fuel and air line hoses
from nozzle assembly.
4. Remove spark plug cable from
spark plug.
5. Remove two screws using 5/16"
nut-driver and remove burner strap.
6. Place hex-body of spark plug into
vise and tighten.
7. Remove spark plug mounting nut
using 11/16" open-end wrench.
8. Remove burner strap from spark
plug.
9. Clean and regap spark plug
electrodes to .055" (1.4 mm) gap.
10.Replace burner strap onto spark
plug. Rotate burner strap to
position spark plug electrodes as
shown in Figure 19.
11.Tighten spark plug with spark plug
mounting nut.
12.Release hex-body of spark plug
from vise.
13.Replace burner strap onto combus-
tion chamber.
14.Attach spark plug cable to spark
plug.
15.Attach fuel and air line hoses to
nozzle assembly.
16.Replace fan (see page 12).
17.Replace fan guard and upper shell.
Air Line
Hose
Burner
Strap Spark Plug
Cable
Nozzle Assembly
Fuel Line Hose
Spark
Plug
Spark Plug
Mounting Nut
Figure 17 - Spark Plug Removal, 35/50 Models
Combustion
Chamber
Bend Here
to Adjust
Gap
Figure 18 - Spark Plug Gap, 35/50 Models
Burner
Strap
45°
Figure 19 - Spark Plug Rotation, 35/50 Models
Spark Plug
(70/100/150 Models)
1. Remove upper shell (see page 12).
2. Remove fan (see page 12).
3. Remove spark plug cable from
spark plug.
4. Remove spark plug from burner
head using 13/16" open-end
wrench.
5. Clean and regap spark plug elec-
trodes as follows:
70/100 Models = .055" (1.4 mm) gap
150 Model = .075" (1.9 mm) gap
6. Install spark plug in burner head.
7. Attachsparkplugcabletosparkplug.
8. Replace fan (see page 12).
9. Replace fan guard and upper shell.
Spark
Plug
Spark Plug
Cable
Burner
Head
Figure 20 - Spark Plug Removal, 70/100/150 Models
Figure 21 - Spark Plug Gap, 70/100/150 Models
.055" (1.4 mm) Gap
Bend Here
to Adjust
Gap
Gap

15
099618
Nozzle
(35/50 Models)
1. Remove upper shell (see page 12).
2. Remove fan (see page 12).
3. Remove fuel and air line hoses
from nozzle assembly.
4. Turn nozzle assembly 1/4 turn to
left and pull toward motor to
remove.
5. Place plastic hex-body into vise
and lightly tighten.
6. Carefully remove nozzle from the
nozzle adapter using 5/8" socket
wrench.
7. Blow compressed air thru 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 inch-pounds/4.5-5.1 n-m).
10.Attach nozzle assembly to burner
strap.
11.Attach fuel and airline hoses to
nozzle assembly.
12.Replace fan (see page 12).
13.Replace fan guard and upper shell.
Nozzle
Adapter
Air Line
Fitting
Fuel Line
Fitting
Nozzle
Seal
Figure 24 - Nozzle and Nozzle Adapter, 35/50 Models
Nozzle
Assembly
Fuel Line Hose
Figure 23 - Removing Nozzle Assembly,
35/50 Models
Nozzle
(70/100/150 Models)
1. Remove upper shell (see page 12).
2. Remove fan (see page 12).
3. Remove fuel and air line hoses from
burner head.
4. Remove spark plug cable from spark
plug.
5. Remove spark plug from burner
head using 13/16" open-end wrench.
6. Remove three screws using
5/16" nut-driver and remove burner
head from combustion chamber.
7. Place burner head into vise and
lightly tighten.
Spark Plug
Cable
Spark
Plug
Combustion
Chamber
Figure 25 - Removing Burner Head, 70/100/150 Models
Combustion
Chamber
Air Line Hose
Figure 22 - Removing Air and Fuel
Line Hoses, 35/50 Models
Air Line Hose Fuel Line Hose
Nozzle
Assembly Burner
Strap
Screw
Continued
Nozzle Face
Nozzle
Burner Head

16
099618
8. Carefully remove nozzle from
burner head by using 5/8" socket
wrench (see Figure 26).
9. Blow compressed air thru face of
nozzle. This will free any dirt in
nozzle area.
10.Inspect nozzle seal for damage.
11.Replace nozzle into burner head
and tighten firmly (80-110 inch-
pounds/9.1-12.4 n-m).
12.Attach burner head to combustion
chamber.
13.Install spark plug in burner head.
14.Attach spark plug cable to spark
plug.
15.Attach fuel and airline hoses to
burner head.
16.Replace fan (see page 12).
17.Replace fan guard and upper shell.
Continued
50 ROTOR-Domestic PFA/P 056B
Rotor
Air Output
Filter
Insert
Fan Guard
Filter End
Cover
Air Intake
Filter
Blade
Pump
Plate
Pump Rotor
(Procedure if rotor is binding)
1. Remove upper shell (see page 12).
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" (.076-.101 mm) if
needed (see Figure 29).
Note: Rotate Rotor one full turn to
insure the gap is .003"/.004" (.076-.101
mm) 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 13).
Note: If rotor is still binding, proceed as
follows.
100 ROTOR-Domestic PFA/P 059A
Insert
Rotor
Air Output
Filter
Blade
Filter End
Cover
Air Intake
Filter
Pump
Plate
Figure 28 - Rotor Location, 100/150 Models
Figure 27 - Rotor Location, 35/50/70 Models
Fan Guard
Figure 26 - Removing Nozzle, 70/100/150 Models
Nozzle Seal
Nozzle Face
Nozzle
Fuel Line Fitting
Burner Head
Air Line Fitting

17
099618
13.Perform steps 1 thru 6 (see
page 16).
14.Place fine grade sandpaper
(600 grit) on flat surface.
Sand rotor lightly in “figure
8” motion four times (see
Figure 30).
15.Reinstall insert and rotor.
16.Perform steps 10 thru 12 (see
page 16).
Figure 29 - Gap Adjusting Screw Locations
Gap Adjusting Screw
Rotor
Sandpaper
Figure 30 - Sanding Rotor
Model Size 35 50 70 100 150
Output Rating (Btu/Hr) 35,000 50,000 70,000 98,000 150,000
Fuel Use Only Kerosene or No. 1 Fuel Oil
Fuel Tank Capacity
(U.S. Gal./Liters) 3/11.3 4/15.1 5/18.9 9/34 13.5/51
Fuel Consumption
(Gal. Per Hr/Liters Per Hr) .26/.98 .37/1.40 .5/1.89 .74/2.80 1.12/
4.24
Nozzle Spray Angle 50°50°50°60°60°
Nozzle Spray Pattern Solid Cone (All Models)
Electric Requirements 120 V/60 HZ (Same All Models)
Amperage (Normal Run) 1.7 2.0 2.3 3.2 4.4
Motor RPM 1725 1725 3450 3450 3450
Hot Air Output (CFM) 165 165 253 481 500
SPECIFICATIONS
Blade
.003"/.004" (.076-.101 mm)
Gap Measured With
Feeler Gauge
Gap Adjusting Screw

18
099618
WIRING
DIAGRAMS
White
Black
Blue
Green
Power Plug
120V/60Hz
Photocell
Spark Plug
Ignitor Flame-
Out
Control
B
Reset
Button
R
Red
Blue
White
White
White
White
Red
Red
Green Terminal
Board
Motor
Figure 31 - Wiring Diagram, 35/50 Models
Figure 32 - Wiring Diagram, 70/100/150 Models
White
Black
Blue
Green
Power Plug
120V/60Hz
Photocell
Spark Plug
Ignitor Flame-
Out
Control
B
Reset
Button
R
Red
Motor Blue
White
White
White
White
Red
Red
Green Terminal
Board
Red
Relay
Black

19
099618
ACCESSORIES
Heater accessories and parts are
available at your local dealer.
Should your dealer not stock or is
unable to order a particular acces-
sory or part, please contact DESA
Industries for more information.
DESA Industries of Canada, Inc.
2220 Argentia Road
Unit #4
Mississauga, Ontario
L5N 2K7
Parts Department
1-905-826-8010
HEAVY DUTY
WHEELS AND
HANDLE KIT - HA1202
For heavy duty applications.
Makes your heater even more
portable and convenient. Fits 35/50/70 models.
THERMOSTAT
KIT - HA1210
For all models. Keeps your building at the
temperature you select day and night. Helps
economize on fuel.
AIR GAUGE KIT - HA1180
For all models. Special tool to
check pump pressure.

20
099618
ILLUSTRATED
PARTS
BREAKDOWN
35 Model
1
2
3
39
5
6
7
8
9
10
11
12
13
14
15
16
9-1 9-2
9-3
9-4
9-5
17
18
19
20
21
22
23
24
25
26
27
28
31
32
33
34
35
36
37
42
38
4
29
30
41 40
12-1
12-3
12-6
12-10
12-2
12-4 12-5
12-7
12-9
12-8
12-11
Motor and Pump Assembly
12-18 12-17
12-16
12-15 12-14
12-13 12-12