Desa Tech BC350D Owner's Manual
OPERATING, MAINTENANCE AND SERVICE INSTRUCTIONS
R
R
WITH PARTS LIST
MODEL BC350D
HIGH PRESSURE HEATER
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.
TABLE OF CONTENTS
Safety Information ............................................... 2
Product Identication ........................................... 3
Unpacking............................................................ 3
Specications ...................................................... 3
Theory of Operation............................................. 4
Fuels .................................................................... 4
Ventilation ............................................................ 4
Operation ............................................................. 5
Storing, Transporting of Shipping ........................ 6
Operation with Portable Generator ...................... 6
Fill In For Your Records
Model No. _____________________
(Located on side panel)
Serial No. ______________________
(Located on fuel tank)
Date of Purchase: _______________
Save this manual for future reference.
For more information, visit www.desatech.com
Preventative Maintenance Schedule ................... 7
Troubleshooting ................................................... 8
Service Procedures ............................................11
Wiring Diagram .................................................. 15
Maintenance Kits ............................................... 15
Technical Service............................................... 15
Accessory .......................................................... 15
Replacement Parts ............................................ 15
Illustrated Parts Breakdown and Parts List........ 16
Warranty and Repair Services ........................... 20
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.
WARNING: This product
contains and/or generates
chemicals known to the State
of California to cause cancer or
birth defects or other reproductive harm.
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs of
carbon monoxide poisoning resemble the u,
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 inuence 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.
1. Use only kerosene or #1 fuel oil to avoid
risk of re or explosion. Never use gasoline, naphtha, paint thinners, alcohol or
other highly ammable fuels.
2. Fueling
a) Personnel involved 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 specied on the
heater’s data plate shall be used.
c) All ame, 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. Any 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 mini-
mum 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
conned to areas where oor penetrations do not permit fuel to drip onto or be
ignited by a re at lower elevation.
h) Fuel storage shall be in accordance with
the federal, state or local authority having jurisdiction.
i) Fill fuel tank or move heater only when
heater is unplugged.
3. Never use heater where gasoline, paint
thinner or other highly ammable vapors
are present.
4. Follow all local ordinances and codes
when using heater. Refer to CSA standard
B139-1976 Installation Code for Oil Burn-
ing Equipment. Recommendation of local
authorities having jurisdiction should be
followed.
5. 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 re retardant nature. These enclosure
materials shall be securely fastened to
prevent them from igniting or from upsetting the heater due to wind action.
6. 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.
7. Use only in places free of flammable
vapors or high dust content.
8. Use only with the electrical voltage and
frequency specied on model plate.
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118997-01B2
SAFETy INFORMATION
Continued
9. Heater must be grounded. Use only a
properly grounded three-wire extension
cord. Plug into grounded outlet only.
10. Minimum heater clearances from combustibles: Outlet 8 Ft., Sides 4 Ft., Top 4 Ft.,
Rear 4 Ft.
11. Locate heater on a stable and level sur-
face while hot or running or a re may
occur.
12. When moving or storing heater, keep
heater in a level position or fuel spillage
may occur.
13. Keep children and animals away from
heater.
14. Never start heater when combustion
chamber is hot or if fuel has accumulated
in combustion chamber.
15. Unplug heater when not in use.
16. This heater has a built-in thermostat.
Plugged-in heater may start at anytime.
17. Never use heater in living or sleeping
areas.
18. Never block air inlet (rear) or air outlet
(front) of heater.
19. Never move, handle, refuel or service a
hot, operating or plugged-in heater.
20. Never attach duct work to front or rear of
heater.
21. Never use gasoline, crankcase drainings,
naphtha, paint thinners, alcohol or other
highly ammable fuels.
22. Never leave a heater plugged in without
adult supervision if children or animals are
likely to be present.
PRODUCT
IDENTIFICATION
Hot Air
Outlet
Lower
Shell
Fuel Cap
Fuel Tank
Thermostat
Flame-Out Control
Reset Button
Figure 1 - 350,000 Btu/Hr Model
Upper Shell
Power
Cord
UNPACkING
1. Remove all protective packing applied to
heater for shipment.
2. Remove heater from shipping container.
3. Check heater for any shipping damage. If
heater is damaged, promptly inform dealer
where you bought heater.
SPECIFICATIONS
• Output Rating: 315,000 Btu/Hr
• Fuel: Use only kerosene or #1 fuel oil
• Air Delivery: 1,332 CFM
• Fuel Tank Capacity: 30 gallons
• Fuel Consumption: 2.5 gal/hr
• Electric Req u irement s : 12 0 V/60 Hz
1 phase
• Amperage: Normal Run - 7.1, Starting - 28
• Motor: 1/3 HP, 1725 RPM
• Fuel Pump Pressure: 100 PSI
• Spark Plug Gap: 0.075"
• Weight (approx.): Dry - 180 lbs
With Full Fuel Tank - 390 lbs
118997-01B 3
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THEORy OF OPERATION
The Fuel System: The motor turns the fuel pump. The fuel pump pulls fuel from the fuel tank.
The fuel pump pushes fuel through a lter and a solenoid valve and out the burner head
nozzle. A ne 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 ame goes
out. It also allows the fan to continue running after normal shutdown of heater. This cools the
combustion chamber.
Combustion Chamber
Clean
Heated
Air Out
Fuel Tank
Spark Plug
Figure 2 - Cross Section Operational View
Burner
Head
Nozzle
Fuel Line To
Air for
Combustion
and Heating
Solenoid Valve
Solenoid
Valve
Fan
Fuel
Motor
Electronic
Ignitor
Fuel Pump/
Fuel Filter
Cool
Air In
Fuel Pickup
Line
Fuel
Filter
FUELS
WARNING: Use only kero-
sene or #1 fuel oil to avoid risk
of re or explosion. Never use
gasoline, naphtha, paint thinners, alcohol or other highly
ammable fuels.
Do not use heavy fuels such as No. 2 fuel oil or
No. 2 diesel. Using heavy fuels will result in:
• clogged fuel lter and nozzle
• carbon build-up on spark plug
• the need of non-toxic anti-icer in fuel during
very cold weather
IMPORTAN T: Use a KEROSENE ONLY
storage container. Be sure storage container
is clean. Foreign matter such as rust, dirt or
water will cause ame-out control to shut
down heater. Foreign matter may also require
you to clean fuel system often.
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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.
Fresh Air Opening Requirements
350,000 Btu/Hr 10.5 ft2 Opening
Note: If you use more than one heater, provide
extra fresh air. Provide a fresh air opening of
at least three square feet for each 100,000
Btu/Hr rating.
118997-01B4
OPERATION
WARNING: Review and un-
derstand the warnings in the
Safety Information section, page
2. They are needed to safely
operate this heater.
TO START HEATER
1. Follow all ventilation and safety information.
2. Locate heater to provide maximum circulation of the heated air. Follow all location
requirements noted in Safety Information,
page 2.
3. Fill fuel tank with kerosene or #1 fuel oil.
4. Attach fuel cap.
5. Set thermostat dial to desired temperature. Note: Thermostat setting must be
higher than surrounding air temperature.
6. Plug power cord of heater into threeprong, grounded extension cord. Extension cord must be at least 6 feet long.
WARNING: Use only a threeprong, grounded extension
cord. Use cord with proper wire
size to assure 120 volt operation.
See Extension Cord Wire Size
Requirements below.
Extension Cord Wire Size Requirements
6 to 100 feet long, use 14 AWG rated cord
101 to 200 feet long, use 12 AWG rated cord
201 to 300 feet long, use 10 AWG rated cord
301 to 400 feet long, use 8 AWG rated cord
401 to 500 feet long, use 6 AWG rated cord
7. Plug extension cord into standard 120
volt/60 hertz, three-hole, grounded outlet.
8. The motor will start when extension cord is
plugged into outlet. The heater should ignite
at once. If heater does not ignite, restart
heater. To restart heater, wait 60 seconds,
then push in ame-out control reset button.
Flame-out control reset button is at rear of
heater near power cord (see Figure 3).
Note: A cold heater may affect the thermostat
setting. This thermostat is a general-heating
control. It is not intended for precise temperature control. Adjust thermostat until heater
cycles at the desired setting.
Note: If starting heater for rst time, you may
need to prime the pump. If equipped, slightly
open bleeder valve of pump to allow air to
escape. Quickly close valve once fuel is seen.
Wipe up any excess fuel. If equipped with
canister fuel lter, remove the canister bottom
and ll with fuel. Reassemble lter. Wipe up
any excess fuel. You may also have to do this
after taking heater out of storage.
Flame-Out
Control
Reset Button
Figure 3 - Flame-Out Control Reset
Button
TO STOP HEATER
CAUTION: Never unplug
heater while heater is running.
Heater must go through purge
cycle. The purge cycle cools the
combustion chamber. Damage
to heater can occur if combustion chamber is not cooled. Do
not restart heater until purge
cycle is complete.
1. Turn thermostat dial to lowest temperature
setting. This will cause heater ame to go
out. The motor will continue to run during
the purge cycle. This allows the fan to cool
the combustion chamber. When the purge
cycle is nished, the motor will stop. Do not
unplug heater until purge cycle is nished.
2. Unplug extension cord from outlet.
3. To temporarily stop heater, set thermostat
at a temperature lower than air around
heater. Heater will cycle back on if air
temperature around heater matches
thermostat setting.
TO RESTART HEATER
CAUTION: Do not restart
heater until purge cycle is nished. The purge cycle cools the
combustion chamber.
1. Wait until purge cycle is nished after
stopping heater.
2. Repeat steps under To Start Heater.
118997-01B 5
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FUEL
F
STORING,
TRANSPORTING OF
SHIPPING
Note: If shipping transport companies require
fuel tanks to be empty.
1. Drain all fuel from fuel lines and pump/lter
(see Fuel Filters, page 14).
2. Clean and ush fuel lter in fuel pump if
equipped (see Fuel Filters, page 14).
3. Remove drain plug and drain fuel tank.
4. Replace drain plug.
5. 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 lters during future
use.
6. Replace fuel cap or drain plug. Properly
dispose of old and dirty fuel. Check with
local automotive service stations that
recycle oil.
7. Add two gallons (350,000 Btu/Hr) of clean
kerosene or #1 fuel oil to fuel tank.
8. Replace fuel cap.
9. Operate heater for 5 minutes (see Opera-
tion, page 5).
10. Stop heater and let cool completely.
11. Remove drain plug and drain fuel tank.
12. Replace drain plug.
13. Properly dispose of old and dirty fuel.
14. If storing, store heater in a dry location.
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.
OPERATION WITH
PORTABLE GENERATOR
WARNING: Before operating
heater or any appliance from a
portable generator, verify that
generator has been properly
connected to earth ground. Improper grounding or failure to
ground generator can result in
electrocution if a ground fault
occurs. Refer to owner’s manual
supplied by generator manufacturer for proper grounding
procedures.
The operating voltage range of the heater is
108 to 132 Volts (120 Volts +/- 10%). Prior
to plugging heater into generator the output
voltage should be veried (if generator is
equipped with the automatic idle feature, the
output voltage should be measured with the
generator running at full speed). If the voltage
does not measure in this range the heater
should not be plugged into the generator.
Refer to Operation, page 5, for starting, stop-
ping and resetting heater procedures.
Ground Lug
Alternator
Ground Wire (#10 AWG
- Stranded-Copper)
Copper
or Brass
Grounding
Point
Figure 4 - Typical Generator Grounding
Method (Generator construction may
vary from that shown)
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118997-01B6
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
How Often
Flush every 150-200 hours of operation or as needed.
How To
See Storing, Transporting or
Shipping, page 6.
Filler neck screen
Fuel lter assembly
(Fuel tank)
Fuel lter lines
Fuel lter (In pump or
external canister)
Nozzle
Spark plug
Fan blades and air
deectors
Air passages around
burner head
Photocell
Check for particles in fuel when lling
fuel tank. Clean when dirty.
Clean twice a heating season or more
often if heater performance indicates
the need. Replace as needed.
Check and tighten loose connections
occasionally.
Clean fuel lter element every 250
hours.
Clean twice a heating season or more
often if heater performance indicates
the need. Replace as needed.
Clean and regap every 300 hours of
operation or replace as needed.
Clean each season or as needed.
Check each season for dirt and
debris.
Clean at least once during heater
season.
Lift out of fuel tank and rinse
with clean kerosene.
See Fuel Filters, page 14.
See Fuel Lines, page 13.
See Fuel Filters, page 14.
See Nozzle, page 11.
See Spark Plug, page 11.
See Fan Blades and Air Deec-
tors, page 11.
Remove debris and trash with
a clean, soft cloth.
Clean photocell face with a soft
cloth. If cell face tends to soot
up, check with your nearest
service station to determine
the cause.
Motor
118997-01B 7
Not required, permanently lubricated.
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TROUBLESHOOTING
WARNING: Never service heater while it is plugged in, operating
or hot. Severe burns and electrical shock can occur. Only a qualied
service person should service and repair heater.
OBSERVED PROBLEM
Motor does not start when
heater is plugged in and thermostat setting is higher than
surrounding air temperature
POSSIBLE CAUSE
1. No power or low voltage at
heater due to:
A) Damaged power cord or
extension cord
B) Wrong size extension
cord
C) Heater plugged into out-
let with voltage lower than
120 volt
2. Loose electrical connections
3. Motor overload protector
tripped due to:
A) Dirty fan
B) Debris pulled into fan
area by fan
C) Binding pump
D) Low voltage
4. Flame-out control not reset
5. Damaged ame-out control
6. Damaged power relay
7. Damaged thermostat
8. Binding pump
REMEDY
1. A) Check condition of power
cord or extension cord. Repair or replace if damaged
B) Use extension cord with
proper wire size (see To
Start Heater, page 5 )
C) Make sure heater is
plugged into 120 volt/60
hertz outlet
2. Check connections. Tighten
if loose
3. A) See Fan Blades and Air
Deectors, page 11
B) Remove debris from fan
and fan guard area
C) Turn fan by hand. If fan
is hard to turn, see Pump,
page 13
D) See steps B and C under
item 1 above
Note: Be sure to reset mo-
tor overload protector by
pressing reset button on
top of motor
4. Press and release ame-
out control reset button.
See Figure 3, page 5 for
button location
5. Replace ame-out control
6. Replace power relay
7. Replace thermostat
8. Turn fan by hand. If fan is
hard to turn, see Pump,
page 13
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118997-01B8
OBSERVED PROBLEM
Heater will not ignite, but
motor runs for a short period
of time.
TROUBLESHOOTING
Continued
POSSIBLE CAUSE
1. A) Fuel tank empty
B) Water in fuel
C) Wrong fuel
2. Dirt in nozzle
3. Very low temperature may
cause fuel to thicken and
not ow
4. Dirty fuel lters
5. Wrong pump pressure
6. Spark plug wire disconnected from plug
7.
Spark plug problems due to:
A) Wrong gap
B) Plug wet with fuel
C) Carbon deposits on plug
D) Damaged plug
8. Solenoid valve not opening
REMEDY
1. A) Add fuel to tank
B) Check fuel tank for bub-
bles of water in bottom. If
found, remove fuel (see Stor-
ing, Transporting or Shipping,
page 6). Clean tank and fuel
lters (see Fuel Filters, page
14). Fill with clean fuel
C) Remove wrong fuel (see
Storing, Transport in g or
Shipping, page 6). Clean
tank and fuel filters (see
Fuel Filters, page 14). Fill
with correct fuel
2. Replace nozzle (see Noz-
zle, page 11)
3. Move heater to warmer
place until fuel ows freely
4. Clean fuel lters (see Fuel
Filters, page 14)
5. Adjust pump pressure (see
Pump Pressure Adjustment
sections, page 12)
6. Connect spark plug wire to
spark plug
7. A) Adjust electrode gap to
0.075" (see Spark Plug,
page 11)
B) Clean fuel from spark
plug with clean, soft cloth
C) Replace plug if heavily
coated with carbon (see
Spark Plug, page 11)
D) Inspect plug for worn or
eroded electrodes. If found,
replace plug (see Spark
Plug, page 11)
8. Check electrical connections and voltage to solenoid. If good, replace
solenoid valve
WARNING: High Voltage!
9. Damaged electronic ignitor
118997-01B 9
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9. Replace electronic ignitor
OBSERVED PROBLEM
Heater ignites, but ame-out
control shuts off heater after
a short period of time
TROUBLESHOOTING
Continued
POSSIBLE CAUSE
1. Wrong pump pressure
2. Dirty fuel lters
3. Dirt in nozzle
4. Dirty photocell lens
5.
Open or damaged photocell
6. Bad ame-out control
7. Damaged fan switch
REMEDY
1. Adjust pump pressure (see
Pump Pressure Adjustment
sections, page 12)
2. Clean fuel lters (see Fuel
Filters, page 14)
3. Replace nozzle (see Nozzle, page 11)
4. Clean photocell lens with
clean cotton swab
5. Replace photocell
6. Replace ame-out control
7. Replace fan switch
Heater burns, but puffs of
smoke can be seen
Heater does not burn steady
Heater burns with odor
Heater smokes continuously
1. Wrong pump pressure
2. A) Heater almost out of
fuel
B) Water condensation in
fuel tank
C) Wrong fuel
3. Dirty fuel lters
4. Air leak in suction system
5. Dirty nozzle
6. Low voltage causing motor to operate below rated
speed
7. Loose fuel line
1. Adjust pump pressure (see
Pump Pressure Adjustment
sections, page 12)
2. A) Add fuel to tank
B) Check fuel tank for bub-
bles of water in bottom. If
found, remove fuel (see
Storing, Tran sporting or
Shipping, page 6). Clean
tank and fuel filters (see
Fuel Filters, page 14). Fill
with clean fuel
C) Remove wrong fuel (see
Storing, Tran sporting or
Shipping, page 6). Clean
tank and fuel filters (see
Fuel Filters, page 14. Fill
with correct fuel
3. Clean fuel lters (see Fuel
Filters, page 14)
4. Tighten all fuel line connections (see Fuel Lines,
page 13)
5. Replace nozzle (see Noz-
zle, page 11)
6. Check voltage at heater.
Voltage at heater should be
not less than 90% of rated
voltage (108V minimum for
120V heaters)
7. Check and tighten all fuel
line connections (see Fuel
Lines, page 13)
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118997-01B10
SERVICE PROCEDURES
WARNING: Never service
heater while it is plugged in, operating or hot. Severe burns and
electrical shock can occur. Only
a qualied service person should
service and repair heater.
UPPER SHELL REMOVAL
1. Remove screws along each side and top
of heater using 5/16" nut-driver. These
screws attach upper and lower shells
together (see Figure 5).
2. Lift upper shell off.
Upper Shell
Figure 5 - Upper Shell Removal
FAN BLADES AND AIR
DEFLECTORS
1. Remove upper shell (see Upper Shell
Removal).
2. Clean fan blades and air deectors with
clean, soft cloth moistened with kerosene
or solvent (see Figure 6).
3. Dry fan blades and air deectors thoroughly.
4. Replace upper shell.
Air
Deector
Fan
Blade
SPARK PLUG
1. Remove upper shell (see Upper Shell
Removal).
2. Remove spark plug wire from spark plug
(see Figure 7).
3. Remove spark plug from burner head using
13/16" open-end wrench (see Figure 7).
4. Replace spark plug if damaged or heavily
coated with carbon.
5. Clean and regap spark plug electrodes to
0.075" (see Figure 8).
6. Install spark plug in burner head.
7. Attach spark plug wire to spark plug.
8. Replace upper shell.
Burner
Head
Figure 7 - Spark Plug Removal
Figure 8 - Spark Plug Gap
Spark Plug
Spark Plug
Wire
0.075"
NOZZLE
1. Remove upper shell (see Upper Shell
Removal).
2. Remove fuel line from solenoid valve using 7/16" wrench.
3. Remove spark plug wire from spark plug.
4. Remove spark plug from burner head
using 13/16" open-end wrench.
5. Remove ve screws using 5/16" nut-driver
and remove burner head from combustion
chamber.
6. Place burner head into vise and lightly
tighten.
7. Carefully remove nozzle from burner head
using 5/8" socket wrench (see Figure 9).
Plug
Nozzle
Spark Plug
Spark Plug
Burner
Figure 6 - Fan Blades and Air Deectors
118997-01B 11
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Head
Fuel Line
Figure 9 - Replacing Nozzle
Wire
Solenoid Valve
SERVICE PROCEDURES
psi
psi
Continued
8. Inspect nozzle for damage. If damaged or
clogged, replace nozzle.
9. Make sure plug is in place on burner
head.
10. Replace nozzle into burner head and
tighten rmly (175-200 inch-pounds).
11.
Attach burner head to combustion chamber.
12. Install spark plug in burner head.
13. Attach spark plug wire to spark plug.
14. Attach fuel line to solenoid valve. Tighten
rmly.
15. Replace upper shell.
PUMP PRESSURE ADJUSTMENT
FOR HEATERS WITH FUEL FILTER/
CANISTER EXTERNAL TO PUMP
1. Remove pressure gauge plug from fuel
pump port marked “GAUGE.”
2. Install accessory pressure gauge (part
number 110380-01) to fuel pump port
marked “GAUGE” (see Figure 10).
3. Start heater (see Operation, page 5). Allow motor to reach full speed.
4. Adjust pressure. Use small flat blade
screwdriver to turn slotted screw at fuel
pump pressure adjusting port. Turn screw
clockwise to increase pressure. Turn
screw counterclockwise to decrease pres-
sure. See specications in Figure 11 for
correct pressure for each model.
5. Stop heater (see page 5).
6. Remove pressure gauge. Replace pressure gauge plug in fuel pump port marked
“GAUGE.”
PUMP PRESSURE ADJUSTMENT
FOR HEATERS WITH FUEL FILTER
INTERNAL TO PUMP
1. Remove pressure gauge plug from fuel
pump port marked “GAUGE.”
2. Install accessory pressure gauge (part
number 110380-01) to fuel pump port
marked “GAUGE” (see Figure 11). Do
not use bleeder valve port to check the
pressure. The bleeder valve port contains
pressure higher than operating pressure.
Setting pump pressure with gauge in the
bleeder valve port results in wrong operating pressure.
3. Start heater (see Operation, page 5). Allow motor to reach full speed.
4. Adjust pressure. Use small flat blade
screwdriver to turn slotted screw at fuel
pump port at top right side of pump. Turn
screw clockwise to increase pressure.
Turn screw counterclockwise to decrease
pressure. See specications in Figure 11
for correct pressure for each model.
5. Stop heater (see page 5).
6. Remove pressure gauge. Replace pressure gauge plug in fuel pump port marked
“GAUGE.”
Pump Pressure
100 PSI
Pressure
Gauge
Fuel Pump
Port Marked
“GAUGE”
Pump Pressure
100 PSI
Pressure
Gauge
Fuel Pump Port
Marked “GAUGE”
Figure 10 - Adjusting Pump Pressure
Fuel Pump
Port Marked
“PRESS ADJ”
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Pressure
Adjustment Port
Figure 11 - Adjusting Pump Pressure
118997-01B12
SERVICE PROCEDURES
Continued
PUMP
(Procedure if Pump is Binding)
1. Remove upper shell (see Upper Shell
Removal, page 11).
2. Loosen hex screw on ange clamp at
rear of motor with 5/16" nut-driver (see
Figure 12).
3. Turn fan with hand (see Figure 13).
4. If fan turns freely, tighten screw on ange
clamp.
5. If fan does not turn freely, replace pump.
6. Replace upper shell.
Hex Screw
On Flange
Clamp
FUEL LINES
(Procedure for Tightening Fuel
Lines)
1. Remove upper shell (see Upper Shell
Removal, page 11).
2. Use an adjustable wrench as a backup on
ttings.
3. Use 7/16" wrench and tighten fuel lines
at solenoid valve, pump and fuel lter
canister (if equipped) (see Figures 14
and 15).
Burner Head
Fuel
Line
Solenoid
Valve
Figure 14 - Fuel Line at Solenoid Valve
Fuel
Pump
Figure 12 - Location of Screw on Flange
Figure 13 - Turning Fan with Hand
118997-01B 13
Clamp
Fuel
Lines
Figure 15 - Fuel Lines at Pump
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SERVICE PROCEDURES
Continued
FUEL FILTERS
A. Tank Fuel Filter
1. Disconnect fuel lines from pump and
fuel lter canister (if equipped) with 7/16"
wrench (see Figure 16 or 17).
2. Carefully pry fuel lter loose from fuel tank
with at end of screwdriver.
3. Inspect fuel lter for water or dirt.
4. Rinse fuel lter and fuel lines with clean
kerosene.
5. Replace fuel lter into fuel tank.
6. Connect fuel lines to pump and fuel lter
canister (if equipped).
B. For Heaters With Fuel Filter/Canister
External To Pump
1. Unscrew canister bottom from canister
top with adjustable pliers.
2. Remove fuel lter and gasket from canister bottom (see Figure 17).
3. Inspect canister bottom and fuel lter for
water droplets or dirt.
4. Rinse canister bottom in clean kerosene.
5. Wipe inside of canister bottom dry with
clean cloth.
6. Rinse fuel lter in clean kerosene.
7. Put clean fuel lter and gasket back in
canister bottom.
8. Screw canister bottom into canister top.
9. Tighten securely. Check for leaks.
C. For Heaters With Fuel Filter Internal
To Pump
1. Remove pump cover to access lter
2. Rinse and wipe inside of pump cover and
dry with clean cloth.
3. Rinse fuel lter in clean kerosene or blow
compressed air from inside out.
4. Reassemble. Tighten securely. Check for
leaks.
Fuel Pump (Filter
Under Cover)
Fuel
Lines
Fuel
Filter
Figure 16 - Removing Tank Fuel Filter
Canister
Top
Gasket
Fuel
Filter
Fuel
Lines
Figure 17 - Fuel Pump Filter and Canister
Fuel Filter
Pump Cover
Figure 18 - Fuel Pump and Filter
Canister
Bottom
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118997-01B14
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