Desa Tech CP350AK, CP600AK Owner's Manual
TRADESMAN K350
and K600
KEROSENE HIGH PRESSURE
PORTABLE FORCED AIR HEATERS
OWNER’S MANUAL
600 SIDE
PV 027
350 SIDE
PV 026
With Thermostat
Heater Sizes: 350,000 and 600,000 Btu/Hr
Models: CP350AK and CP600AK
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 IDENTIFICATION ..................................................... 3
UNPACKING............................................................................... 3
THEORY OF OPERATION ......................................................... 3
FUELS......................................................................................... 4
VENTILATION............................................................................. 4
OPERATION ............................................................................... 4
STORING, TRANSPORTING, OR SHIPPING............................ 5
OPERATION WITH PORTABLE GENERATOR.......................... 5
PREVENTATIVE MAINTENANCE SCHEDULE ......................... 6
TROUBLESHOOTING ................................................................ 6
SERVICE PROCEDURES .......................................................... 8
ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST ....... 12
SPECIFICATIONS .................................................................... 18
WIRING DIAGRAM ................................................................... 18
MAINTENANCE KITS ............................................................... 18
ACCESSORY............................................................................ 18
TECHNICAL SERVICE ............................................................. 18
REPLACEMENT PARTS .......................................................... 18
OWNER’S REGISTRATION FORM.......................................... 19
WARRANTY INFORMATION ...................................... Back Cover
Fill In For Your Records
Model No. ___________________
(Located on side panel)
Serial No. ___________________
(Located on fuel tank)
Date of Purchase: ______________
®
SAFETY INFORMATION
2
SAFETY INFORMATION
WARNINGS
WARNING: This product contains and/or generates
chemicals known to the State of California to cause
cancer or birth defects, or other reproductive harm.
IMPORTANT: Read this owner’s manual carefully and
completely before trying to assemble, operate, or service this heater. Improper use of this heater can cause
serious injury or death from burns, fire, explosion,
electrical shock, and carbon monoxide poisoning.
DANGER: Carbon monoxide poisoning may lead
to death!
Carbon Monoxide Poisoning: Early signs of carbon monoxide
poisoning resemble the flu, with headaches, dizziness, and/or nausea. If you have these signs, the heater may not be working properly.
Get fresh air at once! Have heater serviced. Some people are more
affected by carbon monoxide than others. These include pregnant
women, persons with heart or lung disease or anemia, those under
the influence of alcohol, and those at high altitudes.
Make certain you read and understand all warnings. Keep this
manual for reference. It is your guide to safe and proper operation
of this heater.
• Use only kerosene or No. 1 fuel oil to avoid risk of fire or
explosion. Never use gasoline, naphtha, paint thinners, alcohol, or other highly flammable fuels.
• Fueling
a)Personnel involved with fueling shall be qualified and thor-
oughly 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 extin-
guished 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 reservoir integral with the heater unit).
g)Whenever possible, fuel storage shall be confined to areas
where floor penetrations do not permit fuel to drip onto or
be ignited by a fire at lower elevation.
h)Fuel storage shall be in accordance with the federal, state,
or local authority having jurisdiction.
• Never use heater where gasoline, paint thinner, or other highly
flammable vapors are present.
• Follow all local ordinances and codes when using heater.
• Heaters used in the vicinity of tarpaulins, canvas, or similar
enclosure materials shall be located a safe distance from such
materials. The recommended minimum safe distance is 10 feet.
It is further recommended that these enclosure materials be of
a fire retardant nature. These enclosure materials shall be securely fastened to prevent them from igniting or from upsetting the heater due to wind action.
• Use only in well vented areas. Before using heater, provide at
least a three-square-foot opening of fresh, outside air for each
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.
• Heater must be grounded. Use only a properly grounded threewire extension cord. Plug into grounded outlet only.
• 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.
• Never start heater when combustion chamber is hot or if fuel
has accumulated in combustion chamber.
• 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.
• Never use gasoline, crankcase drainings, naphtha, paint
thinners, alcohol, or other highly flammable fuels.
• Never leave a heater plugged in without adult supervision if
children or animals are likely to be present.
• Warning to New York City Residents For Use Only At Con-
struction Sites in accordance with applicable NYC codes un-
der NYCFD certificate of approval #4803, #4899, #4908,
#4909, or #4934.
105850-01D
PRODUCT IDENTIFICATION
UNPACKING
THEORY OF OPERATION
3
3
PRODUCT IDENTIFICATION
Hot Air
Outlet
Upper Shell
Lower
Shell
Fuel Cap
Thermostat
Flame-Out
Control Reset
Button
Figure 1 - 350,000 Btu/Hr Model
Hot Air Outlet
Fuel Tank
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.
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.
Combustion
Chamber
Spark
Plug
Solenoid Valve
Burner
Head
Fan
Fuel Pump/
Fuel Filter
Motor
Lower
Shell
Fuel Cap
Thermostat
Figure 2 - 600,000 Btu/Hr Model
Upper Shell
Flame-Out
Control
Reset Button
Fuel
Tank
Clean
Heated
Air Out
Power
Cord
Nozzle
Fuel Line To
Fuel Tank
Figure 3 - Cross Section Operational View
Solenoid Valve
Air for
Combustion
and Heating
Electronic
Ignitor
Fuel
Cool
Air In
Fuel
Pickup
Line
Fuel
Filter
105850-01D
FUELS
VENTILATION
4
OPERATION
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
• the need of non-toxic anti-icer in fuel during very cold weather
IMPORTANT:
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.
Use a KEROSENE ONLY storage container. Be
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
Heater Size Square Feet Opening
350,000 Btu/Hr 10.5
600,000 Btu/Hr 18.0
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.
OPERATION
6. Plug power cord of heater into three-prong, grounded extension cord. Extension cord must be at least six feet long.
WARNING: Use only a three-prong, grounded
extension cord. Use cord with proper wire size to
assure 120 volt operation. See
Size Requirements
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
flame-out control reset button. Flame-out control reset button
is at rear of heater near power cord (see Figure 4).
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 first 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 filter, remove the canister bottom
and fill with fuel. Reassemble filter. Wipe up any excess fuel. You
may also have to do this after taking heater out of storage.
below.
Extension Cord Wire
WARNING: Review and understand the warnings
in the
needed to safely operate this heater.
Safety Information
section, page 2. They are
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 Informa-
tion, page 2.
3. Fill fuel tank with kerosene or No. 1 fuel oil.
4. Attach fuel cap.
5. Set thermostat dial to desired temperature.
setting must be higher than surrounding air temperature.
Note:
Thermostat
Flame-Out Control
Reset Button
Figure 4 - Flame-Out Control Reset Button
105850-01D
OPERATION
Continued
OPERATION
STORING, TRANSPORTING, OR SHIPPING
OPERATION WITH PORTABLE GENERATOR
5
5
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 4.
STORING, TRANSPORTING,
OR SHIPPING
Note:
If shipping transport companies require fuel tanks to be
empty.
1. Drain all fuel from fuel lines and pump/filter (see Fuel Filters,
page 11).
2. Clean and flush fuel filter in fuel pump if equipped (see Fuel
Filters, page 11).
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. 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) or three gallons (600,000
Btu/Hr) of clean kerosene or No. 1 fuel oil to fuel tank.
8. Replace fuel cap.
9. Operate heater for 5 minutes (see Operation, page 4).
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:
during next heating season. Using old fuel could damage heater.
Do not store kerosene over summer months for use
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 verified (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, pages 4 and 5, for starting, stopping, and
resetting heater procedures.
Alternator
Figure 5 - Typical Generator Grounding Method (Generator
construction may vary from that shown)
Ground Lug
Copper or Brass
Grounding Point
Ground Wire (#10 AWG Stranded-Copper)
105850-01D
PREVENTATIVE MAINTENANCE SCHEDULE
TROUBLESHOOTING
6
PREVENTATIVE
MAINTENANCE SCHEDULE
Item
Fuel tank
Filler neck screen
Fuel filter assembly (Fuel tank)
Fuel filter lines
Fuel filter (In pump or external
canister)
Spark plug
Fan blades and air deflectors
Air passages around burner head
Motor
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
TROUBLESHOOTING
Note:
For additional help, visit DESA International’s
Technical Service web site at www.desatech.com.
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 5
Lift out of fuel tank and rinse with clean kerosene
See Fuel Filters, page 11
See Fuel Lines, Page 10
See Fuel Filters, page 11
See Spark Plug, page 9
See Fan Blades and Air Deflectors, page 9
Remove debris and trash with a clean, soft cloth
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.
OBSERVED PROBLEM
Motor does not start when heater is plugged
in and thermostat setting is higher than
surrounding air temperature
POSSIBLE CAUSE REMEDY
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 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 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 4)
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 9
B) Remove debris from fan and fan
guard area
C) Turn fan by hand. If fan is hard to
turn, see Pump, page 10
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 4, page 4 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 10
105850-01D
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