Desa Master B350CEA User manual

R
HIGH PRESSURE
PORTABLE
FORCED
AIR HEATER
OWNER’S MANUAL
Model B350CEA
Heater Size: 340,000 Btu/Hr
350 SIDE PFA/PV 008
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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CONTENTS
WARNINGS
DANGER
Carbon monoxide poisoning may lead to death!
IMPORTANT: Read this Owner’s Manual carefully and completely
beforetryingtoassemble,operate,orservicethisheater.Improper
useofthisheatercancauseseriousinjuryordeathfromburns,fire,
explosion, electrical shock, electrocution, and carbon monoxide
poisoning.
SECTION PAGE
Safety Information.................................................................................... 2
Product Identification ............................................................................... 4
Unpacking................................................................................................. 4
Assembly .................................................................................................. 4
Theory of Operation ................................................................................. 6
Fuels ......................................................................................................... 7
Ventilation ................................................................................................ 7
Operation .................................................................................................. 8
Storing, Transporting, or Shipping ........................................................... 9
Preventative Maintenance Schedule....................................................... 10
Troubleshooting...................................................................................... 11
Service Procedures ................................................................................. 14
Upper Shell Removal..................................................................... 14
Fan Blades...................................................................................... 14
Spark Plug...................................................................................... 15
Nozzle ............................................................................................ 15
Pump Pressure Adjustment ............................................................16
Pump .............................................................................................. 16
Fuel Lines ...................................................................................... 16
Fuel Filters ..................................................................................... 17
Specifications.......................................................................................... 18
Wiring Diagram...................................................................................... 18
Accessory ............................................................................................... 18
Illustrated Parts Breakdowns and Parts Lists ......................................... 19
EC Conformity Declraration .................................................................. 22
Warranty and Repair Service................................................... Back Cover
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, people with heart or lung disease or anemia,
those under the influence of alcohol, and those at high altitudes.
SAFETY
INFORMATION
Safety Information continued on next page

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SAFETY
INFORMATION
Continued
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 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)Allflame,includingthepilot light,if any,shallbeextinguishedand theheater
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 (762 cm) 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 authority having jurisdiction.
• Neveruseheaterwheregasoline,paintthinner,orotherhighlyflammablevapors
are present.
• Follow all local ordinances and codes when using heater.
• Useonlyinwellventedareas.Provideatleastthreesquarefeet(2800squarecm)
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.
• Use only a three-prong, grounded (earthed) extension cord.
• Heaters used in the vicinity of tarpaulins, canvas, or similar enclosure materials
shall be located a safe distance from such materials. The recommended mini-
mum safe distance is 10 feet (304.8 cm). It is further recommended that these
enclosurematerials beof afire retardantnature. Theseenclosurematerials shall
be securely fastened to prevent them from igniting or from upsetting the heater
due to wind action.
• Minimum heater clearances from combustibles:
Outlet: 8 Ft. (250 cm) Top, Rear, and Sides: 4 Ft. (125 cm)
• Locate heater on a stable and level surface while hot or running or a fire may
occur.
• Whenheaterismovedorstored,itmustbeinalevelpositionorfuelspillagemay
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.
WARNINGS Continued

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PRODUCT
IDENTIFICATION
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.
ASSEMBLY This model is furnished with wheels and front and rear handles. Wheels, handles,
and mounting hardware are found in the shipping carton.
TOOLS NEEDED
• Pliers
• Two - 7/16" Open or Adjustable Wrenches
1. Slide axle through wheel support frame. Install wheel spacer and then one flat
washer on each end of axle.
2. Install wheels on axle.
IMPORTANT: When installing wheels, point exetended hub of wheels toward
wheel support frame (see Figure 2, page 5).
3. Slide one flat washer on each axle end in front of wheel.
4. Install cotter pins through holes at each end of axle. Bend cotter pins with pliers
to secure.
5. 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.
6. Place front and rear handles on top of fuel tank flange. Insert screws through
handles, fuel tank flange, and wheel support frame. Attach nut finger tight after
inserting each screw.
7. After inserting all screws, tighten nuts firmly.
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Upper Shell
Hot Air Outlet
Lower Shell
Fuel Cap
Thermostat
Fuel Tank
Power Cord
Motor and
Pump
Assembly
Burner Control
Reset Button
Figure 1 - B350CEA Btu/Hr Model

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ASSEMBLY
Continued
Air Inlet
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Front Handle
Cotter
Pin
Rear
Handle
Screw
Axle
Extended
Hub
Nut
Flat Washer
Wheel Spacer
Flat Washer
Figure 2 - Wheel and Handle Assembly
Wheel
Wheel
Support
Frame
Fuel Tank
Flange
Hot Air
Outlet

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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 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 Burner 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.
Cool
Air In
Combustion
Chamber
Clean
Heated
Air Out
Burner
Head
Fuel
Filter
Air for Combustion
and Heating Fuel
Figure 3 - Cross Section Operational View
Spark
Plug
Solenoid
Valve Fan Fuel Pump/
Fuel Filter
Motor
Fuel
Pickup
Line
Electronic
Ignitor
Nozzle
Fuel Tank Fuel Line To
Solenoid Valve

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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 burner
control to shut down heater. Foreign matter may also require fuel system to be
cleaned frequently.
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.
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
Square Square
Heater Size Feet Opening Centimeter Opening
340,000 Btu/Hr 10.5 9755
Note: If you use more than one heater, provide extra fresh air. Provide a fresh air
opening of at least three square feet (2800 square cm) for each 100,000 Btu/Hr
rating.

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OPERATION
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 a standard 220/240 volt, 50 hertz, grounded
(earthed) outlet. Use an extension cord if needed. Use only a three-wire,
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
201 to 300 feet (61.1 to 91.5 meters) long, use 12 AWG (2 mm2) conductor
6. The motor will start when power 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 burner control reset button. Burner control reset
button is at rear of heater near power cord (see Figure 4).
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.
WARNING
Review and understand the warnings in the Safety Information
Section. They are needed to safely operate this heater.
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Burner Control
Reset Button
Figure 4 - Burner Control Reset Button

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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.
Note: If shipping, transport companies require fuel tanks to be empty.
1. Drainall fuelfrom fuelfilters, fuellines, andpump (seeFuel Filters[Tank Fuel
Filter], page 17).
2. Clean and flush fuel filter and canister attached to fuel pump (see Fuel Filters
[Pump Fuel Filter], page 17).
3. Remove drain plug and drain fuel tank.
4. Replace drain plug.
5. Add one gallon (four liters) of clean kerosene to fuel tank.
6. Attach fuel cap.
7. Move the heater forwards and backwards to stir fuel.
8. Remove drain plug and drain fuel tank.
9. Replace drain plug.
10. Add two gallons (eight liters) of clean kerosene or No. 1 fuel oil to fuel tank.
11. Replace fuel cap.
12. Operate heater for 5 minutes (see Operation, page 8).
13. Stop heater and let cool completely.
14. Remove drain plug and drain fuel tank.
15. Replace drain plug.
16. Properly dispose of old and dirty fuel.
17. 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
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 8.
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.
OPERATION
Continued

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How To
See Storage, page 9.
Lift out of fuel tank and rinse
with clean kerosene.
See Fuel Filters, page 17.
See Fuel Lines, Page 16.
See Fuel Filters, page 17.
See Spark Plug, page 15.
See Fan Blades, page 14.
Remove dirt and trash with
clean, soft cloth.
PREVENTATIVE
MAINTENANCE
SCHEDULE Item
Fuel tank
Filler neck screen
Fuel filter assembly
(Fuel tank)
Fuel filter lines
Fuel filter (Pump)
Spark plug
Fan blades
Air passages around
burner head
Motor
How Often
Flush every 150-200 hours
of operation or as needed.
Check for trash 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 trash.
Not required, permanently
lubricated.
WARNING
Never service heater while it is plugged in, operating, or hot.
Severe burns and electrical shock can occur.