L.B. White CP350AK User manual

350 SIDE PV 026
Model Number: CP350AK
Heater Size: 350,000 Btu/Hr
ARL LOGO G 004
®
OWNER’SMANUAL
TRADESMAN K350
HIGH PRESSURE
KEROSENE
PORTABLE FORCED
AIR HEATER
(with Thermostat)
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.

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104042
CONTENTS SECTION PAGE
Safety Information.................................................................................... 2
Product Identification ............................................................................... 4
Unpacking................................................................................................. 4
Fuels ......................................................................................................... 4
Ventilation ................................................................................................ 5
Theory of Operation ................................................................................. 5
Operation .................................................................................................. 6
Storing, Transporting, or Shipping ........................................................... 7
Preventative Maintenance Schedule......................................................... 8
Troubleshooting........................................................................................ 9
Service Procedures ................................................................................. 12
Upper Shell Removal..................................................................... 12
Fan Blades and Air Deflectors ....................................................... 12
Spark Plug...................................................................................... 13
Nozzle ............................................................................................ 13
Pump Pressure Adjustment ............................................................14
Pump .............................................................................................. 14
Fuel Lines ...................................................................................... 14
Fuel Filters ..................................................................................... 15
Specifications.......................................................................................... 16
Wiring Diagram...................................................................................... 16
Accessory ............................................................................................... 16
Technical Service ................................................................................... 16
Illustrated Parts Breakdowns and Parts Lists ......................................... 17
Warranty and Special Information .......................................... Back Cover
SAFETY
INFORMATION
WARNING ICON G 001
WARNING
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.
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.
WARNING ICON G 001
DANGER
Carbon monoxide poisoning may lead to death!

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104042
SAFETY
INFORMATION • 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.
• 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 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. 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 minimum of 25 feet from heaters, torches,
welding equipment, and similar sources of ignition (exception: the fuel reser-
voir integral with the heater unit).
g) Whenever possible, fuel storage shall be confined toareas where floorpenetra-
tions 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 va-
pors 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 recom-
mended 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 three-
square-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 Califor-
nia as a reproductive toxin under Proposition 65.
• 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 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 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.
• This heater has a built-in thermostat. Plugged-in heater may start at 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.

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104042
PRODUCT
IDENTIFICATION Upper Shell
Power Cord
Thermostat
Fuel Cap
Fuel Tank
Hot Air Outlet
Lower Shell
Figure 1 - 350,000 BTU Unit
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.
Motor and
Pump
Assembly
Flame-Out Control
Reset Button
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
• the need of non-toxic anti-icer in fuel during very cold weather
IMPORTANT: Use a KEROSENE ONLY storage container. Be sure storage
container is clean. Foreign matter such as rust, dirt, or water will cause flame-out
control to shut down heater. Foreign matter may also require you to clean fuel
system often.
!
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.

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104042
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 filter and a solenoid valve and out
the burner head nozzle. 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. It also allows the fan to continue running after normal shutdown
of heater. This cools the combustion chamber.
Fan
Combustion
Chamber Spark
Plug Burner Head
Solenoid
Valve Motor
Cool
Air In
Fuel
Filter
Fuel
Pickup
Line
Electronic Ignitor
Fuel Tank Nozzle
Fuel Pump/
Fuel Filter
Fuel
Air for Combustion
and Heating
Figure 2 - Cross Section Operational View
Fuel Line To
Solenoid Valve
!
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.
VENTILATION
Fresh Air Opening Requirements
Heater Size Square Feet Opening
350,000 Btu/Hr 10.5
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.
Clean
Heated
Air Out

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104042
OPERATION
Continued
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. Set thermostat dial to desired temperature.
Note: Thermostat setting must be
higher than surrounding air temperature.
5. Plug power cord of heater into three-prong, grounded extension cord. Exten-
sion cord must be at least six feet long.
!
WARNING
Review and understand the warnings in the Safety Information
Section. They are needed to safely operate this heater.
!
WARNING
Use only a three-prong, 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
6. Plug extension cord into standard 120 volt/60 hertz, three-hole, grounded
outlet.
7. 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 flame-out control reset button. Flame-out control
reset button is at rear of heater near power cord (see Figure 3).
Note: If starting heater for first time, you may need to restart heater several times
before heater ignites. You may also have to do this after taking heater out of
storage. To facilitate starting, remove the canister bottom from the pump's fuel
filter and fill with fuel. Reassemble filter (see Pump Fuel Filter, page 15).
Figure 3 - Flame-Out Control Reset Button
Flame-Out Control
Reset Button

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104042
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
flame 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
finished, the motor will stop. Do not unplug heater until purge cycle is finished.
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 finished. The purge
cycle cools the combustion chamber.
1. Wait until purge cycle is finished after stopping heater.
2. Repeat steps under To Start Heater, page 6.
Note: If shipping transport companies require fuel tanks to be empty.
1. Drainall fuelfrom fuelfilters,fuel lines,and pump(seeFuel Filters[TankFuel
Filter], page 15).
2. Clean and flush fuel filter and canister attached to fuel pump (see Fuel Filters
[Pump Fuel Filter], page 15).
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 filters during
future use.
6. Replacefuelcapordrainplug.Properlydisposeofoldanddirtyfuel.Checkwith
local automotive service stations that recycle oil.
7. Add two gallons of clean kerosene or No. 1 fuel oil to fuel tank.
8. Replace fuel cap.
9. Operate heater for 5 minutes (see Operation, page 6).
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.
STORING,
TRANSPORTING ,
OR SHIPPING
OPERATION
Continued

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104042
PREVENTATIVE
MAINTENANCE
SCHEDULE Item
Fuel tank
Filler neck screen
Fuel filter assembly
(Fuel tank)
Fuel filter lines
Fuel filter (Pump)
Spark plug
Fan blades and air
deflectors
Air passages around
burner head
Motor
!
WARNING
Never service heater while it is plugged in, operating, or hot.
Severe burns and electrical shock can occur.
How To
See Storing, Transporting, or
Shipping, page 7.
Lift out of fuel tank and rinse
with clean kerosene.
See Fuel Filters, page 15.
See Fuel Lines, Page 14.
See Fuel Filters, page 15.
See Spark Plug, page 13.
See Fan Blades and Air
Deflectors, page 12.
Remove debris and trash with
a clean, soft cloth.
How Often
Flush every 150-200 hours
of operation or as needed.
Check for particles in fuel
when filling fuel tank.
Clean when dirty.
Clean twice a heating
season or replace as
needed.
Check and tighten loose
connections occasionally.
Clean fuel filter element
every 250 hours.
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.
Not required, permanently
lubricated.

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104042
OBSERVED
PROBLEM
!
WARNING ICON G 001
WARNING
Never service heater while it is plugged in, operating, or hot.
Severe burns and electrical shock can occur. Only a qualified
service person should service and repair heater.
TROUBLE-
SHOOTING
Motor does not
start when heater
is plugged in and
thermostat setting
is higher than
surrounding air
temperature.
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
outlet with voltage lower
than 120 volt
2. Loose electrical connec-
tions
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 flame-out
control
6. Damaged power relay
7. Damaged thermostat
8. Binding pump
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 6).
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
Deflectors, page 12
B) Remove debris from fan
and fan guard area.
C) Turn fan by hand. If fan
is hard to turn, see Pump,
page 14.
D) See steps B and C under
item 1 above.
Note: Be sure to reset
motor overload protector
by pressing reset button on
top of motor.
4. Press and release flame-out
control reset button. See
Figure 3, page 6 for button
location.
5. Replace flame-out control.
6. Replace power relay.
7. Replace thermostat.
8. Turn fan by hand. If fan is
hard to turn, see Pump, page
14.
POSSIBLE CAUSE REMEDY

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104042
OBSERVED
PROBLEM
Heater will not
ignite, but motor
runs for a short
period of time.
1. A) Add fuel to tank.
B) Check fuel tank for bubbles
of water in bottom. If found,
remove fuel (see Storing,
Transporting, or Shipping, page
7). Clean tank and fuel filters
(see Fuel Filters, page 15). Fill
with clean fuel.
C) Remove wrong fuel (see
Storing,Transporting, or
Shipping, page 7). Clean tank
and fuel filters (see Fuel Filters,
page 15). Fill with correct fuel.
2. Replace nozzle (see Nozzle,
page 13).
3. Move heater to warmer place
until fuel flows freely.
4. Clean fuel filters (see Fuel
Filters, page 15).
5. Adjust pump pressure (see
Pump Pressure Adjustment,
page 14).
6. Connect spark plug wire to
spark plug.
7. A) Adjust electrode gap to
.075" (see Spark Plug, page 13).
B) Clean fuel from spark
plug with clean, soft cloth.
C) Replace plug if heavily
coated with carbon (see
Spark Plug, page 13).
D) Inspect plug for worn or
eroded electrodes. If found,
replace plug (see Spark Plug,
page 13).
8. Check electrical connections
and voltage to solenoid. If
good, replace solenoid valve.
9. Replace electronic ignitor.
POSSIBLE CAUSE REMEDY
!
WARNING
High Voltage!
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 flow
4. Dirty fuel filters
5. Wrong pump pressure
6. Spark plug wire discon-
nected 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
9. Damaged electronic ignitor
TROUBLE-
SHOOTING
Continued