Heating, Air Conditioning, and Ventilation
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HEATING, AIR CONDITIONING, AND VENTILATION
In addition to controlling the engine
operating temperature, the engine
coolant is circulated throughout the
vehicle to heat exchangers. A
forced air system directs the heated
air through various outlets for
operator and passenger comfort.
Front Heat/Defrost
Blower Switch
A three position rotary control knob,
located on the front instrument
panel, controls a three-speed
blower motor for the front
heater/defroster/ventilation unit.
In order for the unit to operate, place
the Master Switch in either the DAY
RUN or NIGHT RUN position, with
the engine running.
The front heater/defroster/
ventilation unit has three individual
outlets. The first outlet allows air to
be deflected against the windshield
and operator’s side window for
defrosting.
The other two outlets allow air to be
directed to the operator’s
compartment. The unit draws 100%
filtered, fresh air into the vehicle on
a continuous bases.
There are three rotary controls
located on the left side of the
driver’s instrument panel to control
air flow/ventilation or heat to the
operator’s compartment.
Ventilation Control
This three position (OFF, HEAT,
VENTILATION) rotary control knob
allows the operator to select either
heat (red icon) or air flow ventilation
(blue icon) mode.
Driver’s Temperature Control
This rotary control knob governs the
flow of hot engine coolant to the
front heater/defroster core. Turning
the control clockwise increases the
air temperature.
