Desa Tech B110A, B150H, R110A, R150E, R155A Owner's Manual
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PORTABLE
FORCED
AIR HEATERS
OWNER’S MANUAL
100 SIDE FRONT HANDLES PFA/PV 003
150 SIDE FRONT HANDLE
Heater Sizes:
110,000 150,000 155,000 Btu/Hr
H.S.I. Series
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
PFA/PV 007
CONTENTS
SECTION PAGE
Safety Information......................................................................... 2
Product Identification ....................................................................4
Unpacking ..................................................................................... 4
Assembly ....................................................................................... 5
Theory of Operation ...................................................................... 6
Fuels ..............................................................................................6
Ventilation ..................................................................................... 7
Operation ....................................................................................... 7
Storing, Transporting, or Shipping ................................................ 8
Preventative Maintenance Schedule .............................................8
Troubleshooting.............................................................................9
Service Procedures ........................................................................ 10
Upper Shell Removal.............................................................. 10
Fan...........................................................................................10
Air Output, Air Intake, and Lint Filters.................................. 10
Pump Pressure Adjustment..................................................... 11
Fuel Filter................................................................................ 11
Ignitor...................................................................................... 12
Nozzle ..................................................................................... 13
Pump Rotor ............................................................................. 14
Specifications.................................................................................15
Wiring Diagrams ........................................................................... 15
Maintenance Kits........................................................................... 15
Technical Service .......................................................................... 16
Replacement Parts ......................................................................... 16
Accessories .................................................................................... 16
Illustrated Parts List ......................................................................17-19
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.
103065
SAFETY
INFORMATION
Continued
WARNINGS
• 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 regula-
tions 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 stor age shall be outside the struc-
ture.
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 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 ha v-
ing 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-squarefoot 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 California as a reproductive
toxin under Proposition 65.
• Use only in places free of flammable vapors or high dust content.
• Use only 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 if heater is 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.
• When used with thermostat, heater may start 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.
(Continued)
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3
PRODUCT
IDENTIFICATION
Hot Air
Outlet
Upper Shell
Lower
Shell
Fuel Cap
Side Cover
Ignition Control Assembly
(assembly on inside of
side cover)
Fan Guard
Fuel Tank
Power Cord
Figure 1
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.
4
103065
ASSEMBLY
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 2).
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
Fuel
Tank
Flange
Wheel
Support
Frame
Wheel
Hot Air
Outlet
Front
Handle
Screw
Rear
Handle
Air Inlet
Nut
103065
Cap Nut
Extended Hub
Axle
Figure 2 - Wheel and Handle Assembly
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 control assembly applies power to the
ignitor. The ignitor ignites the fuel and air mixture.
The Flame-Out Control System: This system causes the heater to shut
down if the flame goes out.
Clean
Heated
Air Out
Combustion
Chamber
Fuel Tank
Nozzle
Air For Fuel
System
Ignitor
Fuel Filter
Air For Combustion
And Heating
Burner
Head
Air Line
To Burner
Motor
Fan
Ignition Control
Assembly
Air Pump
Air
Intake
Filter
Cool
Air
In
Air
Output
Filter
Fuel
Figure 3 - Cross Section Operational View
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 ignitor
• the need of non-toxic anti-icer in fuel during very cold weather
IMPORTANT:
container is clean. Foreign matter such as rust, dirt, or water will cause the
ignition control system to shut down heater. Foreign matter may also require you
to clean fuel system often.
6
Use a KEROSENE ONLY storage container. Be sure storage
103065
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