Desa Tech B110M3, B150M3, R70M3, R110M3, R150M3 Owner's Manual
...
PORTABLE
FORCED
AIR HEATERS
OWNER’S MANUAL
Heater Sizes: 70,000 110,000 150,000 BTU/Hr
Featuring: Built-In Thermostat with LCD Display
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.
®
ARL LOGO
G 004
CONTENTS
SECTION PAGE
Safety Information.........................................................................2
Product Identification ....................................................................4
Unpacking .....................................................................................5
Assembly .......................................................................................5
Theory of Operation ......................................................................6
Fuels ..............................................................................................6
Ventilation .....................................................................................7
Operation Without Thermostat .....................................................7
Operation With Thermostat........................................................... 8
Storage........................................................................................... 10
Preventative Maintenance Schedule .............................................10
Troubleshooting.............................................................................11
Service Procedures ........................................................................ 13
Upper Shell Removal.............................................................. 13
Fan...........................................................................................13
Air Output, Air Intake, and Lint Filters.................................. 14
Pump Pressure Adjustment..................................................... 14
Fuel Filter................................................................................ 15
Spark Plug............................................................................... 15
Nozzle ..................................................................................... 16
Pump Rotor ............................................................................. 17
Specifications.................................................................................18
Wiring Diagram............................................................................. 18
Maintenance Kits...........................................................................19
Accessories .................................................................................... 19
Warranty and Repair Service ........................................................ Back Cover
SAFETY
INFORMATION
2
!
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, 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.
Continued
101697
SAFETY
INFORMATION
Continued
• 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 t o areas where floor penetra-
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
vapors are present. Never use heater in areas with high dust content.
• Minimum heater clearances from combustibles:
Outlet: 8 Ft. Sides: 4 Ft. Top: 4 Ft. Rear: 4 Ft.
• 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. Provide at least three square feet of fresh,
outside air for each 100,000 BTU/Hr of rating. This heater produces carbon
monoxide, which is listed by the State of California as a reproductive toxin
under Proposition 65.
• Use only a three-prong, grounded extension cord. Use only with the electrical
voltage and frequency specified on model plate.
• Unplug heater when not in use.
• Never block air inlet (rear) or air outlet (front) of heater. Never attach duct
work to front or rear of heater.
• 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.
• Never move, handle, refuel, or service a hot, operating, or plugged-in heater.
• When used with thermostat, heater may start anytime.
• Keep children and animals away from heater.
• Never use heater in living or sleeping areas.
• Follow all local ordinances and codes when using heater.
101697
3
PRODUCT
IDENTIFICATION
Hot Air Outlet
Lower Shell
Handle
Upper Shell
Fan Guard
Air Filter
End Cover
Side Cover
Hot Air
Outlet
Lower
Shell
Fuel Cap
Flame Control Display
(see Figure 3, below)
Figure 1 - 70,000 BTU/Hr Model
Fuel Cap
Fuel Tank
Power Cord
Upper Shell
Fan Guard
Fuel Tank
Side Cover
Flame Control Display
(see Figure 3, below)
Figure 2 - 110,00 and 150,000 BTU/Hr Models
OFF Button
ON/Reset Button
Figure 3 - Flame Control Display
Power Cord
4
101697
UNPACKING
1. Remove all packing items applied to heater for shipment.
2. Remove all items from carton.
3. Check items for shipping damage. If heater is damaged, promptly inform dealer
where you bought heater.
ASSEMBLY
(For 110,000 and 150,000
BTU/Hr Models Only)
These models are furnished with wheels and a front handle. Some models are
furnished with a rear handle also. Wheels, handle(s), 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 if provided) on top of fuel tank flange.
Insert screws through handle(s), 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
101697
Fuel
Tank
Flange
Wheel
Support
Frame
Wheel
Cap Nut
Hot Air
Outlet
Screw
Nut
Extended
Axle
Figure 4 - Wheel and Handle Assembly,
110,000 and 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 ignition system (part of the flame control) sends
voltage to the spark plug. The spark plug ignites the fuel and air mixture.
The Flame Control System: This system monitors the combustion process
inside the heater. The flame control will shut down the heater when it is out of
fuel or when flame is unstable.
Air Pump
Air
Intake
Filter
Combustion
Chamber
Spark
Plug
Burner
Head
Motor
Fan
Clean
Heated
Air Out
FUELS
Fuel
Tank
Nozzle
Air For Fuel
System
Figure 5 - Cross Section Operational View
Fuel
Filter
Air For Combustion
And Heating
THEORY CUTAWAY
Air Line
To Burner
PFA/OV 003
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.
Cool
Air
In
Air
Output
Filter
Ignition System
Flame Control
Fuel
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 the flame
control to shut down heater. Foreign matter may also require you to clean fuel
system often.
6
101697
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