Desa B70D, R70D User Manual
PORTABLE
FORCED
AIR HEATER
OWNER’S MANUAL
Heater Size: 70,000 Btu/Hr
Models: R70D and B70D
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
70,000 Btu/Hr H.S.I. Series
PORTABLE FORCED AIR HEATERS
SAFETY
INFORMATION
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.
• Use only kerosene or No. 1 fuel oil to
avoid risk of fire or explosion. Ne ver use
gasoline, naphtha, paint thinners, alcohol, or other highly flammable fuels.
• Fueling
a) Personnel involv ed 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. An y 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 v apors
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.
• Approved by the New York City Fire
Department under certificate of approval
#4803, #4860, #4908, or #4909. To be
used only at construction sites in accordance with applicable New York City
Codes, Regulations, Rules, Directives,
Permits, etc.
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OWNER’S MANUAL
PRODUCT IDENTIFICATION
Hot Air Outlet
Lower Shell
Fuel Tank
Side Cover
Ignition Control Assembly
(assembly on inside of side cover)
Power Cord
Figure 1 - 70,000 Btu/Hr
Handle
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
The Ignition System: The ignition control 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.
Motor
Fan
Upper Shell
Fan Guard
Air Filter
End Cover
Air Pump
Air Intake
Filter
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.
Fuel Cap
Clean
Heated
Air Out
Fuel
Tank
Figure 2 - Cross Section Operational View
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Nozzle
Air For Fuel System
Fuel
Filter
Air Line
To Burner
Air For Combustion
And Heating
Cool
Air In
Air
Output
Filter
Ignition Control
Assembly
Fuel
3
70,000 Btu/Hr H.S.I. Series
PORTABLE FORCED AIR HEATERS
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:
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.
Use a KEROSENE ONLY
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:
one of the following:
• a two-car garage door (16 feet wide opening) raised two inches
• a single-car garage door (9 feet wide
opening) raised three inches
• two windows (30 inches wide opening)
raised six inches
A 70,000 Btu/Hr heater requires
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 infor mation.
2. Fill fuel tank with kerosene or No. 1
fuel oil.
3. Attach fuel cap.
4. Plug power cord of heater into threeprong, 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
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.
section, page
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 sec-
onds then heater will start.
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OWNER’S MANUAL
STORING,
TRANSPORTING,
OR SHIPPING
Note:
If shipping, transport companies re-
quire fuel tanks to be empty.
1. Drain fuel tank. Drain fuel through fuel
cap opening. Be sure all fuel is removed.
2. 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.
3. Replace fuel cap. Properly dispose of old
and dirty fuel. Check with local automotive service stations that recycle oil.
4. 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 and 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 lubricated
How To
See Storing, Transporting, or
Shipping
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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