Desa PORTABLE FORCED User Manual
PORTABLE
FORCED
AIR HEATERS
OWNER’S MANUAL
Heater Sizes: 8,8 (30,000) 20,5 (70,000)
26,4 (90,000) 44 kW (150,000 Btu/Hr)
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.
CONTENTS
SECTION PAGE
Safety Information.................................................................................. 3
Product Identification ............................................................................. 4
Unpacking............................................................................................... 5
Assembly ................................................................................................ 5
Theory of Operation ............................................................................... 6
Fuels ....................................................................................................... 6
Ventilation .............................................................................................. 7
Operation ................................................................................................ 7
Storing, Transporting, or Shipping ......................................................... 8
Preventative Maintenance Schedule....................................................... 8
Troubleshooting...................................................................................... 9
Service Procedures ................................................................................ 10
Upper Shell Removal ...................................................................... 10
Fuel Filter (8,8/20,5 kW [30/70,000 Btu/Hr] Models) ................... 10
Fuel Filter (26,4 kW [90,000 Btu/Hr] Model) ................................ 11
Fuel Filter (44 kW [150,000 Btu/Hr] Model) ................................. 11
Spark Plug (8,8 kW [30,000 Btu/Hr] Model) ................................. 12
Spark Plug (20,5/26,4/44 kW [70/90/150,000 Btu/Hr] Models) .... 13
Air Output, Air Intake, and Lint Filters .......................................... 14
Pump Pressure Adjustment ............................................................. 14
Nozzle (8,8 kW [30,000 Btu/Hr] Model)........................................ 15
Nozzle (20,5/26,4 kW [70/90,000 Btu/Hr] Models)....................... 16
Nozzle (44 kW [150,000 Btu/Hr] Model)....................................... 17
Pump Rotor ..................................................................................... 18
Fan................................................................................................... 19
Specifications......................................................................................... 19
Wiring Diagrams ................................................................................... 20
Illustrated Parts Breakdown and Parts List............................................ 21
Wheels and Handles (26,4/44 kW [90/150,000 Btu/Hr] Models) .. 21
8,8 kW (30,000 Btu/Hr) Model....................................................... 22
20,5 kW (70,000 Btu/Hr) Model..................................................... 24
26,4 kW (90,000 Btu/Hr) Model..................................................... 26
44 kW (150,000 Btu/Hr) Model...................................................... 28
Accessories ............................................................................................ 30
Warranty and Repair Service................................................... Back Cover
2
099623
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, or nausea. If you have these signs, the
heater may not be working properly. Get fresh air at once! Have heater serviced.
Some people are more affected by carbon monoxide than others. These include
pregnant women, persons with heart or lung disease or anemia, those under the
influence of alcohol, and those at high altitudes.
Make certain you read and understand all warnings. Keep this manual for
reference. It is your guide to safe and proper operation of this heater.
• Use only kerosene or No. 1 fuel oil to avoid risk of fire or explosion. Never
use gasoline, naphtha, paint thinners, alcohol, or other highly flammable
fuels.
• Never use heater where gasoline, paint thinner, or other highly flammable
vapors are present.
• Follow all local ordinances and codes when using heater.
• Use only in well-vented areas. Provide at least a three-square foot (2800
square cm) opening of fresh, outside air for each 29,3 kW (100,000 Btu/Hr)
of rating.
• Use only in places free of flammable vapors or high dust content.
• Use only with the electrical voltage and frequency specified on model plate.
• Use only a grounded (earthed) extension cord.
• Minimum heater clearances from combustibles:
Outlet: 250 cm (8 Ft.) Sides, Top, and Rear: 125 cm (8 Ft.)
• Locate heater on a stable and level surface while 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. Using duct work could
reduce the necessary air flow of heater. Heater would produce excessive
carbon monoxide.
099623
3
PRODUCT
IDENTIFICATION
Hot Air Outlet
Upper Shell
Lower Shell
Fuel Tank
Side Cover
Flame-Out
Control Reset
Button
Hot Air
Outlet
Lower
Shell
Handle
Fan Guard
Air Filter
End Cover
Fuel Cap
Power Cord
Figure 1 - 8,8/20,5 kW (30/70,000 Btu/Hr) Models
Upper Shell
Hot Air
Outlet
Lower
Shell
Fuel Cap
Side Cover
Fuel Cap
Flame-Out
Control Reset Button
Figure 2 - 26,4 kW (90,000 Btu/Hr) Model
Upper Shell
Fan Guard
Fuel Tank
Power Cord
Air Filter
End Cover
Fan Guard
Fuel
Tank
Flame-Out Control
Power Cord
4
Figure 3 - 44 kW (150,000 Btu/Hr) Model
Reset Button
099623
UNPACKING
1. Remove all packing items applied to heater for shipment.
2. Remove all items from carton.
3. Check items for any shipping damage. If heater is damaged, promptly inform
dealer where you bought heater.
ASSEMBLY
(For 26,4 and 44 kW [90,000
and 150,000 Btu/Hr]
Models Only)
These models are furnished with wheels and handles. Wheels, handles, 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:
wheel support frame (see Figure 4).
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 flange with holes on wheel support
frame.
4. Place front handle and rear handle on top of fuel tank flange. Insert screws
through handles, fuel tank flange, and wheel support frame. Attach nut finger
tight after each screw is inserted.
5. After all screws are inserted, tighten nuts firmly.
When installing wheels, point extended hub of wheels toward
Front
Handle
099623
Hot Air
Outlet
Fuel
Tank
Flange
Wheel
Support
Frame
Wheel
Cap Nut
Screw
Nut
Extended
Axle
Figure 4 - Wheel and Handle Assembly, 26,4/44 kW
(90/150,000 Btu/Hr Models) Only
Hub
Rear
Handle
Air
Inlet
5
THEORY OF
OPERATION
The Fuel System: The air pump forces air through the air line. The air is then
pushed through the burner head 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 electronic ignitor sends voltage to the spark plug.
The spark plug ignites the fuel and air mixture.
The Flame-Out Control System: This system causes the heater to shut down
if the flame goes out.
Clean
Heated
Air Out
Fuel
Tank
Combustion
Chamber
Nozzle
Air For Fuel
System
Figure 5 - Cross Section Operational View
Spark
Plug
Fuel
Filter
Motor
Burner
Head
Air line
To Burner
Air For Combustion
And Heating
Fan
Air Pump
Intake
Air
Filter
Cool
Air
In
Output
Air
Filter
Electronic
Ignitor
Fuel
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:
• clogged fuel filter and nozzle
• carbon build up on spark plug
• use of non-toxic anti-icer in fuel during very cold weather
IMPORTANT:
Use a KEROSENE ONLY container. Be sure storage container is
clean. Foreign matter such as rust, dirt, or water will cause the flame-out control to
shut down heater. Foreign matter may also require you to clean fuel system often.
6
099623
VENTILATION
WARNING
Follow the minimum fresh, outside air ventilation
requirements. If proper fresh, outside air ventilation is not
provided, carbon monoxide poisoning can occur. Provide
proper fresh, outside air ventilation before running heater.
Provide a fresh air opening of at least 2800 square cm (three square feet) for each
29,3 kW (100,000 Btu/Hr) rating. Provide extra fresh air if more heaters are being
used.
OPERATION
Example:
• a 4,88 m (16 foot) wide two-car garage door raised 8,59 cm (3.38 inches)
• a 2,75 m (9 foot) wide single-car garage door raised 15,24 cm (6 inches)
• two, 76,20 cm (thirty-inch) wide windows raised 28 cm (11 inches)
A 44 kW (150,000 Btu/Hr) heater requires one of the following:
WARNING
Review and understand the warnings in the Safety
Information Section. 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 information.
2. Fill fuel tank with kerosene or No. 1 fuel oil.
3. Attach fuel cap.
4. Plug power cord of heater into standard 230 volt/50 hertz, grounded (earthed)
outlet. Use an extension cord if needed. Use only a grounded (earthed) extension cord.
Extension Cord Wire Size Requirements
Up to 100 feet (30.5 meters) long, use 16 AWG (1.0 mm2) conductor
101 to 200 feet (30.6 to 61 meters) long, use 14 AWG (1.5 mm2) conductor
Heater will start when power cord is plugged into outlet. If not, push in flameout control reset button (see Figures 6 thru 8).
099623
Flame-Out
Control
Reset
Button
Figure 6 - Flame-Out Control Reset
Button, 8,8/20,5 kW (30/70,000 Btu/Hr)
Models
Flame-Out
Control
Reset
Button
Figure 7 - Flame-Out Control Reset
Button, 26,4 kW (90,000 Btu/Hr)
Model
Continued
7
OPERATION
Continued
STORING,
TRANSPORTING
,
OR SHIPPING
Flame-Out
Control
Reset Button
(Fan Guard
Removed)
Figure 8 - Flame-Out Control Reset Button, 44 kW (150,000 Btu/Hr) Model
To Stop Heater
1. Unplug power cord from outlet.
To Restart Heater
1. Wait 2 minutes after stopping heater.
2. Repeat steps under To Start Heater, page 7.
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.
PREVENTATIVE
MAINTENANCE
SCHEDULE
8
IMPORTANT:
heating season. Using old fuel could damage heater.
Do not store kerosene over summer months for use during next
WARNING
Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
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 14.
Air intake Wash and dry with soap and See Air Output, Air Intake,
filter water every 500 hours of and Lint Filters, page 14.
operation or as needed.
Fuel filter Clean twice a heating season See Fuel Filter, pages 10
or as needed. and 11.
Continued
099623
Continued
TROUBLE-
SHOOTING
Item How Often How To
Spark plug Clean and regap every 600 See Spark Plug, pages 12 and 13.
hours operation or replace
as needed.
Fan blades Clean every season or as needed. See Fan, page 19.
Motor Not required/permanently lubricated
WARNING
Never service heater while it is plugged in, operating, or hot.
Severe burns and electrical shock can occur.
OBSERVED FAULT POSSIBLE CAUSE REMEDY
Heater ignites, but
flame-out control
shuts off heater after
a short period of
time.
Wrong pump pressure
Dirty air output, air intake,
and lint filters
Dirty fuel filter
Dirt in nozzle
Dirty photocell lens
Bad flame-out control
See Pump Pressure
Adjustment, page 14.
See Air Output, Air Intake
and Lint Filters, page 14.
See Fuel Filter, pages 10
and 11.
See Nozzle, pages 15 thru 17.
Clean photocell lens.
Replace flame-out control.
Heater will not
ignite, but motor runs
for a short period of
time.
Motor does not start
when heater is
plugged in, fan
rotates slowly or
does not turn.
Wrong pump pressure
Carbon deposits on spark
plug and/or improper gap
Dirty fuel filter
Dirt in nozzle
Water in fuel tank
WARNING: High voltage!
Electronic ignitor not
grounded (earthed)
Bad electronic ignitor
Flame-out control not reset
Binding pump rotor
See Pump Pressure
Adjustment, page 14.
See Spark Plug, pages 12
and 13.
See Fuel Filter, pages 10
and 11.
See Nozzle, pages 15 thru
17.
Drain and flush fuel tank
with clean kerosene. See
Storing, Transporting, or
Shipping, page 8.
Make sure electronic
ignitor mounting is tight.
Replace electronic ignitor.
Reset flame-out control
button, see Figures 6 thru
8, pages 7 and 8.
If fan is hard to turn, see
Pump Rotor, page 18.
099623
9
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 9 - Upper Shell Removal,
8,8/20,5 kW (30/70,000 Btu/Hr)
Models
Upper
Shell
Upper
Shell
Fan
Guard
Figure 10 - Upper Shell Removal,
25,4 kW (90,000 Btu/Hr) Model
Fuel Filter
(8,8/20,5 kW [30/70,000 Btu/Hr]
Models)
1. Remove side cover screws
using 5/16" nut-driver.
2. Remove side cover.
3. Pull rubber fuel line off
fuel filter neck.
4. Carefully pry bushing and
fuel filter out of fuel tank.
5. Wash fuel filter with clean
fuel and replace in tank.
6. Attach rubber fuel line to
fuel filter neck.
7. Replace side cover.
10
Fan Guard
Figure 11 - Upper Shell Removal, 44 kW (150,000 Btu/Hr) Model
Fuel Filter
Side Cover
Fuel Line
Figure 12 - Fuel Filter Removal, 8,8/20,5 kW (30/70,000 Btu/Hr) Models
099623
Fuel Filter
(26,4 kW [90,000 Btu/Hr] Model)
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,
lower fuel line, and fuel
filter out of fuel tank.
5. Wash fuel filter with clean
fuel and replace in tank.
6. Attach upper fuel line to
fuel filter neck.
7. Replace side cover.
Fuel Filter, Bushing,
and Lower Fuel Line
Upper
Fuel Line
Side Cover
Figure 13 - Fuel Filter Removal, 26,4 kW (90,000 Btu/Hr) Model
Fuel Filter
(44 kW [150,000 Btu/Hr] Model)
1. Remove upper shell (see
page 10).
2. Remove fan (see page 19).
3. Loosen flare nut using 3/4"
open-end wrench. Push fuel
tube down, away from
burner head. Fuel filter is
located inside of fuel tube.
4. Lift out fuel filter.
5. Wash fuel filter with clean
fuel and replace in fuel
tube.
6. Connect fuel tube to burner
head. Attach flare nut until
nut seats against fuel tube
and fitting. Tighten 1/4 turn
more using 3/4" open-end
wrench (100-130 inchpounds/11.3-14.7 n-m).
7. Replace fan (see page 19).
8. Replace fan guard and
upper shell.
Fuel Filter
Fuel Tube
Flare Nut
Combustion
Chamber
Burner
Head
Figure 14 - Fuel Filter Removal, 44 kW (150,000 Btu/Hr) Model
099623
11
Spark Plug
(8,8 kW [30,000 Btu/Hr] Model)
1. Remove upper shell (see
page 10).
2. Remove fan (see page 19).
3. Remove fuel and air line
hoses from nozzle
assembly.
4. Remove spark plug wire
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 (see Figure 17).
11.Tighten spark plug with
spark plug mounting nut.
12.Release hex-body of spark
plug from vise.
13.Replace burner strap onto
combustion chamber.
14.Attach spark plug wire to
spark plug.
15.Attach fuel and air line
hoses to nozzle assembly.
16.Replace fan (see page 19).
17.Replace fan guard and
upper shell.
Combustion
Chamber
Spark Plug
Mounting Nut
Air Line
Hose
Figure 15 - Spark Plug Removal, 8,8 kW (30,000 Btu/Hr) Model
Figure 16 - Spark Plug Gap, 8,8 kW (30,000 Btu/Hr) Model
Burner
Strap
Burner
Strap
Burner
Strap
.055" (1.4 mm) Gap
Spark
Plug
Nozzle
Assembly
Fuel Line
Hose
Spark Plug
Wire
Bend Here
to Adjust
Gap
12
Figure 17 - Spark Plug Rotation, 8,8 kW (30,000 Btu/Hr) Model Only
099623
Spark Plug
(20,5/26,4/44 kW [70/90/150,000
Btu/Hr] Models)
1. Remove upper shell (see
page 10).
2. Remove fan (see page 19).
3. Remove spark plug wire
from spark plug.
4. Remove spark plug from
burner head using 13/16"
open-end wrench.
5. Clean and regap spark plug
electrodes to .055"
(1.4 mm) gap.
6. Install spark plug in burner
head.
7. Attach spark plug wire to
spark plug.
8. Replace fan (see page 19).
9. Replace fan guard and
upper shell.
Burner
Head
(20,5/26,4 kW [70/90,000 Btu/Hr] Model Shown)
Spark Plug Wire
Spark
Plug
Figure 18 - Spark Plug Removal, 20,5/26,4/44 kW
(70/90/150,000 Btu/Hr) Models
Bend Here
to Adjust
Gap
.055"
(1.4 mm)
Gap
Figure 19 - Spark Plug Gap, 20,5/26,4/44 kW (70/90/150,000 Btu/Hr) Models
099623
13
Air Output, Air Intake,
and Lint Filters
1. Remove upper shell (see
page 10).
2. Remove filter end cover
screws using 5/16" nutdriver.
3. Remove filter end cover.
4. Replace air output and lint
filters.
5. Wash or replace air intake
filter (see Preventative
Maintenance Schedule,
page 8).
6. Replace filter end cover.
7. Replace fan guard and
upper shell.
IMPORTANT:
filters
Do not oil
Air Intake Filter
Filter End
Cover
Lint Filter
Air Output
Filter
Figure 20 - Air Output, Air Intake, and Lint Filters,
8,8/20,5 kW (30/70,000 Btu/Hr) Models
Air Intake Filter
Filter End
Cover
Fan Guard
(26,4 kW [90,000
Btu/Hr] Model
Shown)
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 7). 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.
14
Lint Filter
Air Output
Filter
Figure 21 - Air Output, Air Intake, and Lint Filters,
26,4/44 kW (90/150,000 Btu/Hr) Models
(8,8/20,5 kW [30/70,000 Btu/Hr] Models Shown)
Pressure
Gauge
Plug
Figure 22 - Pressure Gauge Plug Removal
Model Pump Pressure
8,8 kW (30,000 Btu/Hr) 17,93 kPa (2.6 PSI)
20,5 kW (70,000 Btu/Hr) 26,20 kPa (3.8 PSI)
26,4 kW (90,000 Btu/Hr) 30,34 kPa (4.4 PSI)
44 kW (150,000 Btu/Hr) 33,78 kPa (4.9 PSI)
Relief
Valve
Pressure
Gauge
Figure 23 - Adjusting Pump Pressure
099623
Nozzle
(8,8 kW [30,000 Btu/Hr] Model)
1. Remove upper shell (see
page 10).
2. Remove fan (see page 19).
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 19).
13.Replace fan guard and
upper shell.
Combustion
Chamber
Nozzle
Assembly
Fuel Line Hose
Air Line Hose
Figure 24 - Removing Air and Fuel Line Hoses, 8,8 kW (30,000 Btu/Hr) Model
Burner
Strap
Nozzle
Assembly
099623
Figure 25 - Removing Nozzle Assembly, 8,8 kW (30,000 Btu/Hr) Model
Nozzle
Face
Nozzle
Nozzle
Adapter
Figure 26 - Nozzle and Nozzle Adapter, 8,8 kW (30,000 Btu/Hr) Model
Nozzle
Seal
Air line
Fitting
Fuel line
Fitting
15
Nozzle
(20,5/26,4 kW [70/90,000 Btu/Hr]
Models)
1. Remove upper shell (see
page 10).
2. Remove fan (see page 19).
3. Remove fuel and air line
hoses from burner head.
4. Remove spark plug wire
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.
8. Carefully remove nozzle
from burner head using
5/8" socket wrench (see
Figure 28).
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 wire to
spark plug.
15.Attach fuel and airline
hoses to burner head.
16.Replace fan (see page 19).
17.Replace fan guard and
upper shell.
Combustion
Chamber
Spark Plug
Burner Head
Screw
Air Line Hose
Fuel Line Hose
Figure 27 - Removing Burner Head, 20,5/26,4 kW (70/90,000 Btu/Hr) Models
Nozzle
Face
Nozzle
Seal
Nozzle
Burner
Head
Wire
Spark
Plug
16
Air line
Fitting
Figure 28 - Removing Nozzle, 20,5/26,4 kW (70/90,000 Btu/Hr) Models
Fuel line
Fitting
099623
Nozzle
(44 kW [150,000 Btu/Hr] Model)
1. Remove upper shell (see
page 10).
2. Remove fan (see page 19).
3. Remove spark plug wire
from spark plug.
4. Remove spark plug from
burner head using 13/16"
open-end wrench.
5. Loosen flare nut using
3/4" open-end wrench.
Push fuel tube down.
6. Remove air line hose from
burner head.
7. Remove three screws
using 5/16" nut-driver and
remove burner head from
combustion chamber.
8. Place burner head into vise
and lightly tighten.
9. Carefully remove nozzle
from burner head using
5/8" socket wrench (see
Figure 30).
10.Blow compressed air thru
face of nozzle. This will
free any dirt in nozzle area.
11.Inspect nozzle seal for
damage.
12.Replace nozzle into burner
head and tighten firmly
(80-110 inch-pounds/9.1-
12.4 n-m).
13.Attach burner head to
combustion chamber.
14.Install spark plug in burner
head.
15.Attach spark plug wire to
spark plug.
16.Attach fuel tube and airline
hose to burner head.
Attach flare nut until nut
seats against fuel tube and
fitting. Tighten 1/4 turn
more using 3/4" open-end
wrench (100-130 inchpounds/11.3-14.7 n-m).
17.Replace fan (see page 19).
18.Replace fan guard and
upper shell.
Combustion
Chamber
Burner Head
Screw
Air Line Hose
Figure 29 - Removing Burner Head, 44 kW (150,000 Btu/Hr) Model
Nozzle
Face
Nozzle
Burner
Head
Figure 30 - Removing Nozzle, 44 kW (150,000 Btu/Hr) Model
Nozzle
Seal
Flare Nut
Fuel Tube
Spark Plug
Wire
Spark
Plug
099623
17
Pump Rotor
(Procedure if rotor is binding)
1. Remove upper shell (see
page 10).
2. Remove filter end cover
screws using 5/16" nutdriver.
3. Remove filter end cover
and air filters.
4. Remove pump plate
screws using 5/16" nutdriver.
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 33).
Note:
Rotate rotor one
full turn to insure the gap is
.003"/.004" (.076/.101 mm) at
tightest position. Adjust if
needed.
Blade
Pump
Plate
Insert
Rotor
Air Output
Filter
Figure 31 - Rotor Location, 8,8/20,5 kW (30/70,000 Btu/Hr) Models
Blade
Insert
Rotor
Air
Output
Filter
Pump
Plate
Air
Intake
Filter
Filter End
Cover
Air
Intake
Filter
Filter End
Cover
Fan Guard (26,4
kW [90,000 Btu/
Hr] Model Shown)
Fan Guard
(26,4 kW
[90,000 Btu/
Hr] Model
Shown)
10.Install blades, pump plate,
air filters, and filter end
cover.
11.Replace fan guard and
upper shell.
12.Adjust pump pressure (see
page 14).
Note:
If rotor is still binding,
proceed as follows.
13.Perform steps 1 thru 6
above.
14.Place fine grade sandpaper
(600 grit) on flat surface.
Sand rotor lightly in
“figure 8” motion four
times (see Figure 34).
15.Reinstall insert and rotor.
16.Perform steps 10 thru 12
above.
Figure 32 - Rotor Location, 26,4/44 kW (90/150,000 Btu/Hr) Models
Gap Adjusting
Screw
.003"/.004"
(.076/.101 mm) Gap
Measured With
Feeler Gauge
Blade
Gap
Adjusting
Screw
Figure 33 - Gap Adjusting
Screw Locations
Rotor
Figure 34 - Sanding Rotor
Sandpaper
18
099623
Fan
IMPORTANT:
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
page 10).
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 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 36).
7. Place setscrew on flat of
shaft. Tighten setscrew
firmly (40-50 inch-pounds/
4.5-5.6 n-m).
8. Replace fan guard and
upper shell.
Remove fan
Setscrew
Motor
Shaft
Figure 35 - Fan, Motor Shaft, and Setscrew Location
Fan
Fan
Flush
SPECIFICATIONS
Motor
Shaft
Setscrew
Figure 36 - Fan Cross Section
Output Rating (kW) 8,8 20,5 26,4 44
(Btu/Hr) 30,000 70,000 90,000 150,000
Fuel Use Only Kerosene or No. 1 Fuel Oil
Fuel Tank Capacity
(U.S. Gal./Liters) 3.0/11.35 5.0/18.92 9.0/34.06 13.5/51.09
Fuel Consumption
(Gal. Per Hr./Liters Per Hr.) .23/.87 .49/1.85 .66/2.5 1.10/4.16
Electric Requirements 230 V/50 Hz (Same All Models)
Amperage (Normal Run) .8 1.0 1.58 1.5
Hot Air Output (CFM/CMM) 140/3.96 225/6.36 425/12 600/17
099623
RPM 1425 2850 2850 2850
19
WIRING
Ignitor
White
Brown
Blue
Green/Yellow
Photocell
Spark Plug
Flame-
Out
Control
B
Reset
Button
R
Red
Blue
White
Blue
White
Red
Red
Orange
Terminal
Board
Motor
Green/
Yellow
Red
Motor
Start
Relay
Black
S or 2 M or 3
L or 1
230V/50Hz
Ignitor
White
Brown
Blue
Green/Yellow
Photocell
Spark Plug
Flame-
Out
Control
B
Reset
Button
R
Red
Blue
White
Blue
White
Red
Red
Orange Terminal
Board
Motor
Green/
Yellow
230V/50Hz
DIAGRAMS
Figure 37 - Wiring Diagram, 8,8 kW (30,000 Btu/Hr) Model
20
Figure 38 - Wiring Diagram, 20,5/26,4 kW (70/90,000 Btu/Hr) Models
230V/50Hz
Green/
Yellow
Blue
White
Motor
Orange
Black
Start
Capacitor
Run
Capacitor
Red
Black
Black
Figure 39 - Wiring Diagram, 44 kW (150,000 Btu/Hr) Model
Spark Plug
Ignitor
S or 2 M or 3
Black
Red
Motor
Start
Relay
L or 1
Terminal
Board
White
Red
Brown
Green/Yellow
Blue
Photocell
Red
White
Blue
B
Flame-
Out
Control
R
Reset
Button
099623
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