Desa H.S.I. Series Owner's Manual page 3

PRODUCT IDENTIFICATION
Hot Air
Outlet
Upper
Shell
Lower
Shell
Fuel
Tank
Side Cover
Ignition Control
Assembly (On Inside
of Side Cover)
Power
Cord
Figure 1 - 55/60 Models
UNPACKING
1. Remove all packing items applied to heater for shipment.
2. Remove all items from carton.
3. Check items for any shipping damage. If heater is damaged,
promptly inform dealer where you bought heater.
112846-01A
Handle
Thermostat Knob
(Thermostat Models Only)
Fan Guard
Fuel Cap
For more information, visit www.desatech.com
For more information, visit www.desatech.com
THEORY OF OPERATION
The Fuel System:
is then pushed through the nozzle. This air causes fuel to be lifted from
the tank. A fine mist of fuel is sprayed into the combustion chamber.
The Air System:
and around the combustion chamber. This air is heated and provides
a stream of clean, hot air.
The Ignition System:
power to the ignitor. This ignites the fuel/air mixture in the combus-
tion chamber.
The Flame-Out Control System:
Air Filter
shut down if the flame goes out.
End
Combustion
Cover
Chamber
Clean
Heated
Air Out
Fuel
Nozzle
Tank
Air For Fuel
System
Figure 2 - Cross Section Operational View
FUELS
WARNING: Use only kerosene, #1/#2 diesel/fuel
oil, JET A or JP-8 fuels to avoid risk of fire or explo-
sion. Never use gasoline, oil drained from crank-
cases, naphtha, paint thinners, alcohol or other highly
flammable fuels.
Use only kerosene, #1/#2 diesel/fuel oil, JET A or JP-8 fuels.
Heavier fuels such as No. 2 fuel oil or No. 2 diesel fuel may also be
used but will result in:
• noticeable odor
• additional fuel filter maintenance
• the need for nontoxic, anti-icer additives in very cold weather
Do not use fuels heavier than No. 2 grade or heavy oils such as oil
drained from crankcases. These heavy oils will not ignite properly
and will contaminate the heater.
IMPORTANT: Use a KEROSENE ONLY (blue) or DIESEL ONLY
(yellow) storage container. Be sure storage container is clean. For-
eign matter such as rust, dirt, or water will cause the ignition control
assembly to shut down heater. Foreign matter may also require
heater's fuel system to be frequently cleaned.
PRODUCT IDENTIFICATION
UNPACKING
THEORY OF OPERATION
The air pump forces air through the air line. The air
The motor turns the fan. The fan pushes air into
The ignition control assembly provides
This system causes the heater to
Motor
Ignitor
Fan
Fuel Air Line
Filter To Burner
Air For
Combustion
And Heating
3 3
FUELS
Air
Pump
Air Intake
Filter
Cool
Air In
Air
Output
Filter
Ignition
Control
Assembly
Fuel