Desa RK150 User Manual
®
PORTABLE
FORCED
AIR HEATER
OWNER’S MANUAL
150 SIDE FRONT HANDLE
Model RK150
Heater Size 150,000 Btu/Hr
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.
PFA/PV 007
CONTENTS
!
SECTION PAGE
Safety Information......................................................................2
Product Identification .................................................................4
Unpacking ..................................................................................4
Assembly ....................................................................................5
Theory of Operation ...................................................................6
Fuels ...........................................................................................7
Ventilation ..................................................................................7
Operation ....................................................................................8
Storing, Transporting, or Shipping .............................................9
Preventative Maintenance Schedule ..........................................9
Troubleshooting..........................................................................10
Service Procedures .....................................................................11
Upper Shell Removal...........................................................11
Fan........................................................................................11
Air Output, Air Intake, and Lint Filters...............................11
Pump Pressure Adjustment..................................................12
Fuel Filter.............................................................................12
Spark Plug............................................................................12
Nozzle ..................................................................................13
Pump Rotor ..........................................................................13
Specifications..............................................................................14
Wiring Diagram..........................................................................15
Maintenance Kits........................................................................15
Accessories ................................................................................. 15
Illustrated Parts Breakdown and Parts List ................................16
Burner Head Assembly........................................................18
Motor and Pump Assembly .................................................18
Warranty and Repair Service .....................................................Back Cover
SAFETY
INFORMATION
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.
Carbon monoxide poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs of carbon monoxide poisoning
resemble the flu, with headaches, dizziness, 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.
W ARNINGS
!
DANGER
2
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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 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 (7.62 m) 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 pen-
etrations do not permit fuel to drip onto or be ignited by a fire at lower eleva-
tion.
h) Fuel storage shall be in accordance with the 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 materi-
als shall be located a safe distance from such materials. The recommended
minimum safe distance is 10 feet (3.048 m). 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 a 4 1/2-square-foot (4,180 square
cm) opening of fresh outside air.
• Use only in places free of flammable vapors or high dust content.
• Use only with 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. (244 cm) Sides, Top, and Rear: 4 Ft. (122 cm)
• 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.
• 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
UNPACKING
Lower
Shell
Fuel Cap
Side Cover
Burner
Control Reset
Button
Figure 1 - RK150 Model
1. Remove all packing items applied to heater for shipment.
2. Remove all items from carton.
Fan Guard
Fuel Tank
Power Cord
3. Check items for shipping damage. If heater is damaged, promptly inform
dealer where you bought heater.
4
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ASSEMBLY
This model is furnished with wheels and a front handle. Wheels, handle, 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 on top of fuel tank flange. Insert screws through handle,
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
Hot Air
Outlet
Fuel
Tank
Flange
Wheel
Support
Frame
Wheel
Front
Handle
Screw
Air
Inlet
Nut
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Cap Nut
Axle
Figure 2 - Wheel and Handle Assembly
Extended
Hub
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 electronic ignitor sends voltage to the spark plug.
The spark plug ignites the fuel and air mixture.
The Burner Control System: This system causes the heater to shut down if
the flame goes out.
Clean
Heated
Air Out
Fuel
Tank
Combustion
Chamber
Nozzle
Air For Fuel
System
THEORY CUTAWAY
Spark
Plug
Fuel
Filter
Motor
Burner
Head
Air Line
To Burner
Air For Combustion
And Heating
PFA/OV 003
Fan
Air Pump
Air
Intake
Filter
Cool
Air
In
Air
Output
Filter
Electronic
Ignitor
Fuel
Figure 3 - Cross Section Operational View
6
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