Desa Tech B60 Owner's Manual
PORTABLE FORCED
AIR HEATER
OWNER’S MANUAL
Heater Sizes:
40,000, 55,000, and
60,000 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.
TABLE OF CONTENTS
SAFETY INFORMATION .............................................2
UNPACKING................................................................2
PRODUCT IDENTIFICATION......................................3
THEORY OF OPERATION ..........................................3
FUELS .........................................................................3
VENTILATION..............................................................3
OPERATION ................................................................4
OPERATION WITH PORTABLE GENERATOR ..........4
PREVENTATIVE MAINTENANCE SCHEDULE ..........4
TROUBLESHOOTING.................................................5
Fill In For Your Records
Model No. ___________________
(Located on side panel)
SERVICE PROCEDURES...........................................6
TECHNICAL SERVICE................................................9
REPLACEMENT PARTS .............................................9
STORING, TRANSPORTING, OR SHIPPING.............9
SPECIFICATIONS .....................................................10
WIRING DIAGRAM....................................................10
ACCESSORIES.........................................................11
ILLUSTRATED PARTS BREAKDOWN .....................12
PARTS LIST...............................................................13
WARRANTY AND REPAIR SERVICE .......................14
Serial No. ___________________
(Located on fuel tank)
®
• SAFETY INFORMATION
• UNPACKING
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. 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 instr uctions
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 fuelline 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 sur face 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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2
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• PRODUCT IDENTIFICATION
• THEORY OF OPERATION
• FUELS
• VENTILATION
PRODUCT IDENTIFICATION
Hot Air Outlet
Lower Shell
Fuel Tank
Side Cover
Ignition Control Assembly
(assembly on inside of side cover)
Power Cord
Figure 1
THEORY OF OPERATION
The Fuel System:
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.
Clean
Heated
Air Out
The air pump forces air
Combustion Chamber
The Ignition System:
assembly provides power to the ignitor.
This ignites the fuel/air mixture in the combustion chamber.
The Flame-Out Control System: This sys-
tem causes the heater to shut down if the
flame goes out.
Ignitor
Handle
Motor
Fan
Upper Shell
Fan Guard
Air Filter
End Cover
Fuel Cap
The ignition control
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
• the need of nontoxic 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 ignition control assembly
to shut down the heater. Foreign matter may
also require you to clean fuel system often.
VENTILATION
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.
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 1 1/2 inches
• a single-car garage door (9-feet-wide
opening) raised 2 1/2 inches
• two windows (30-inches-wide opening)
raised 4 1/2 inches
A 60,000 Btu/Hr heater requires
Fuel
Tank
Figure 2 - Cross Section Operational View
103658
Nozzle
Air For Fuel
System
Fuel
Filter
Air Line
To Burner
Air For Combustion
And Heating
Ignition
Control
Assembly
Fuel
3
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• OPERATION
• OPERATION WITH PORTABLE
GENERATOR
• PREVENTATIVE MAINTENANCE
SCHEDULE
OPERATION
WARNING: Review and un-
derstand the warnings in the
Safety Information
2. They are needed to safely op-
erate 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 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
seconds then heater will start.
OPERATION WITH
PORTABLE
GENERATOR
WARNING: Before operating
heater or any appliance from a
portable generator, verify that
generator has been properly connected to earth ground. Improper
grounding or failure to ground
generator can result in electrocution if a ground fault occurs.
Refer to owner’s manual supplied
by generator manufacturer for
proper grounding procedures.
The operating voltage range of the heater is
108 to 132 Volts (120 Volts +/- 10%). Prior
to plugging heater into generator the output
voltage should be verified (if generator is
equipped with the automatic idle feature, the
output voltage should be measured with the
generator running at full speed). If the voltage does not measure in this range the heater
should not be plugged into the generator.
Refer to Operation, column one of this
page, for starting, stopping, and resetting
heater procedures.
Ground Lug
L
E
U
F
F
Copper
or Brass
Grounding
Point
Alternator
Figure 3 - Typical Generator Grounding
Method (Generator construction may vary
from that shown)
Ground Wire (#10 AWG Stranded-Copper)
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
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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 lubricated
4
How To
See Storing, Transporting, or Shipping,
page 9.
See Air Output, Air Intake, and Lint Filters,
page 6
See Air Output, Air Intake, and Lint Filters,
page 6
See Fuel Filter, page 7
See Fan, page 6
103658
• TROUBLESHOOTING
TROUBLESHOOTING
Note:
For additional help, visit DESA
International’s technical service web
site at www.desatech.com.
FAULT CONDITION
Motor does not start five seconds after heater
is plugged in
Motor starts and runs but heater does not ignite
WARNING: Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
POSSIBLE CAUSE
1. No power to heater
WARNING: High voltage!
2. Bad electrical connection between motor and ignition control assembly or ignition control assembly and power cord
3.
Blown fuse on ignition control assembly
4. Binding pump rotor
5. Defective ignition control assembly
6. Defective motor
1. No fuel in tank
2. Pump pressure incorrect
3. Dirty fuel filter
4. Obstruction in nozzle
5. Water in fuel tank
REMEDY
1. Check circuit breaker in electrical panel
2. Check all electrical connections. See
Wiring Diagram, page 10
3. See Ignition Control Assembly, page 9
4. If fan does not turn freely, see Pump Ro-
tor, page 8
5. Replace ignition control assembly
6. Replace motor
1. Fill tank with kerosene
2. See Pump Pressure Adjustment, page 6
3. See Fuel Filter, page 7
4. See Nozzle Assembly, page 8
5. Drain and flush fuel tank with clean
kerosene. See Storing, T ransporting , or
Shipping, page 9
Heater ignites but ignition control assembly
shuts heater off after a short period of time
WARNING: High voltage!
6. Bad electrical connection between ignitor and ignition control assembly
7. Defective ignitor
8. Defective ignition control assembly
1. Pump pressure incorrect
2. Dirty air intake, air output, and/or lint
filter
3. Dirty fuel filter
4. Obstruction in nozzle
5. Photocell assembly not properly installed (not seeing the flame)
WARNING: High voltage!
6. Dirty photocell lens
7. Bad electrical connection between photocell and ignition control assembly
8. Defective photocell
9. Defective ignition control assembly
6. Check electrical connections. See Wir-
ing Diagram, page 10.
7. Replace ignitor, see page 7.
8. Replace ignition control assembly.
1. See Pump Pressure Adjustment, page 6
2. See Air Output, Air Intake, and Lint F il-
ters, page 6
3. See Fuel Filter, page 7
4. See Nozzle Assembly, page 8
5. Make sure photocell boot is properly
seated in bracket
6. Clean photocell lens
7. Check electrical connections. See Wir-
ing Diagram, page 10
8. Replace photocell
9. Replace ignition control assembly
103658
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