Desa Tech REM155A Owner's Manual
PORTABLE
FORCED
AIR HEATERS
OWNER’S MANUAL
RM115 - 115,000 Btu/Hr
and RM155 - 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.
®
115,000 and 155,000 Btu/Hr H.S.I. Series
PORTABLE FORCED AIR HEATERS
SAFETY
INFORMATION
W ARNINGS
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 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 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 threesquare-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 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.
• Warning to New York City Residents
For Use Only At Construction Sites in
accordance with applicable NYC codes
under NYCFD certificate of approval
#4803, #4899, #4908, #4909, or #4934.
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.
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104362
OWNER’S MANUAL
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:
point extended hub of wheels toward
wheel support frame (see Figure 1).
When installing wheels,
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.
Front
Handle
Fuel
Tank
Flange
Wheel
Support
Frame
Wheel
Cap Nut
Hot Air
Outlet
Screw
Rear
Handle
Air Inlet
Nut
Extended Hub
Axle
Figure 1 - Wheel and Handle Assembly
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3
115,000 and 155,000 Btu/Hr H.S.I. Series
PORTABLE FORCED AIR HEATERS
PRODUCT IDENTIFICATION
Hot Air
Outlet
Lower Shell
Fuel Cap
Side Cover
Ignition Control Assembly
(assembly on inside of side cover)
Figure 2
THEORY OF OPERATION
The Fuel System: The air pump forces
air through the air line. The air is then
pushed through the 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.
Combustion Chamber
Ignitor
Clean
Heated
Air Out
The Ignition System: The ignition con-
trol assembly provides power to the ignitor.
This ignites the fuel/air mixture in the combustion chamber.
The Flame-Out Control System: This
system causes the heater to shut down if the
flame goes out.
Upper Shell
Motor
Fan
Fan Guard
Fuel Tank
Power Cord
Air Pump
Air Intake
Filter
Cool
Air
In
Air
Output
Filter
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 a clogged fuel filter and/or nozzle.
IMPORTANT:
Use a KEROSENE ONLY
storage container. Be sure storage container is
clean. Foreign matter such as rust, dirt, or
water will cause the ignition control assembly
to shut down the heater. Foreign matter may
also require you to clean fuel system often.
VENTILATION
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.
Provide at least a three-square-foot opening
of fresh, outside air for each 100,000 Btu/Hr
rating. Provide extra fresh air if more heaters are being used.
Example:
quires one of the following:
• a two-car garage door (16 feet wide
opening) raised 4 inches
• a single-car garage door (9 feet wide
opening) raised 7 inches
• two 30 inch wide windows raised 12
inches
A 155,000 Btu/Hr heater re-
Fuel
Tank
Figure 3 - Cross Section Operational View
Nozzle
Air For Fuel System
Fuel
Filter
Air Line
To Burner
Air For Combustion
And Heating
4
Ignition Control
Assembly
Fuel
104362
OWNER’S MANUAL
OPERATION
WARNING: Review and un-
derstand the warnings in the
Safety Information
2. They are needed to safely operate this heater. Follow all local
codes when using this heater.
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. Plug power cord of heater into three-prong,
grounded extension cord. Extension cord
must be at least six feet long.
Extension Cord Wire Size
Requirements
• 6 to 10 feet long, use 18 AWG rated
cord
• 11 to 100 feet long, use 16 AWG
rated cord
• 101 to 200 feet long, use 14 AWG
rated cord
section, page
5. Plug extension cord into standard 120
volt/60 hertz, three-hole, grounded
outlet.
Note:
Ignitor will preheat for
five seconds then heater will start.
TO STOP HEATER
Unplug extension cord from outlet.
TO RESET HEATER
1. Unplug extension cord from outlet and
wait 10 seconds (two minutes if heater
has been running).
2. Plug extension cord into standard 120
volt/60 hertz, three-hole, grounded
outlet.
Note:
Ignitor will preheat for
five seconds then heater will start.
STORING,
TRANSPORTING,
OR SHIPPING
Note:
If shipping, transport companies re-
quire fuel tanks to be empty.
1. Drain fuel tank.
Note:
This model has a drain plug on
underside of fuel tank. Remove drain
plug to drain all fuel. Be sure all fuel is
removed.
2. Replace drain plug.
3. 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.
4. Replace fuel cap and drain plug.
Properly dispose of old and dirty fuel.
Check with local automotive service
stations that recycle oil.
5. If storing, store heater in dry place.
Make sure storage place is free of dust
and corrosive fumes.
IMPORTANT:
summer months for use during next heating
season. Using old fuel could damage heater.
Do not store kerosene over
PREVENTATIVE MAINTENANCE SCHEDULE
WARNING: Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
Item
Fuel tank
Air output and lint filters
Air intake filter
Fuel filter
Ignitor
Fan blades
Motor
How Often
Flush every 150-200 hours of operation or
as needed
Replace every 500 hours of operation or once
a year
Wash and dry with soap an water every 500
hours of operation or replace as needed
Clean twice a heating season or replace as
needed
No maintenance required
Clean each season or as needed
Not required/permanently lubricate
How To
See Storing, Transporting, or Shipping,
above
See Air Output, Air Intake, and Lint Filters,
page 7
See Air Output, Air Intake, and Lint Filters,
page 7
See Fuel Filter, page 8
See Fan, page 7
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