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FOUR SEASON
AIR CONDITIONING SYSTEM
Optional Four Season Air Conditioning blends
Heating
For maximum heat, move the lower two levers
fully right (the upper lever will move automati-
cally to OUTSIDE air position) and push the
FAN switch fully down. Heated air will flow
through the heater floor distributor outlet.
Vary the heater output to satisfy your com-
fort requirements by moving the FAN switch
and the TEMPERATURE lever as required.
heating and cooling units
into
a single system to
provide complete comfort control during any
season of the year.
Cooling
For maximum cooling capacity when first turn-
ing on the system and during periods of extreme
heat and humidity, move all three levers fully
left and push the FAN switch fully down.
Cooled, recirculated air flow will enter the cab
through the adjustable instrument panel outlets.
During periods of less severe heat and humid-
ity, the upper lever may be set on the vertical
mark to the left of the word AIR to blend in a
To defrost or DE-ICE, operate the heater as
portion of outside air.
described above, but with the upper lever moved
During more temperate weather conditions,
fully right to divert the entire airflow to the de-
move the upper lever to the word OUTSIDE for
froster outlets. Moving the lever back toward the
full outside air.
left will split the airflow between the defroster
Vary
the FAN switch (which must be turned
outlets and the floor distributor outlet in propor-
"on" during cooling operations) and the TEM-
tion to the movement of the lever.
PERATURE lever as necessary to satisfy your
See the Heater Operating Tips on page 21.
comfort requirements.
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Bi-Level
Operation
Set the control levers as shown to supply heated air at
the floor and cooler air at the dash outlets. Vary tempera-
ture control and fan speed as desired.
• 23 •
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