system. Operate the air conditioner only after
the engine compartment is warm, and the inte-
rior of the cab is 70°F (21°C) or higher. During
cold weather, the heater can be operated at the
same time to prevent discomfort.
1.
If the cab is hot inside, temporarily open the win-
dows to let the hot air out.
2.
Move the air selection switch to the non-air con-
ditioning face only position and turn the fan
switch off before starting the engine. See
Fig. 4.11
.
3.
Start the engine.
4.
Move the air selection switch to either one of the
air conditioning settings. With the control at ei-
ther one of the air conditioning settings, fresh air
is drawn into the cab. With the control at maxi-
mum air conditioning, the air inside the cab is
recirculated.
IMPORTANT: If the outside air is dusty or
smoky, set the air selection switch at maximum
air conditioning and keep the windows and vent
closed to prevent drawing in dust or smoke. On
vehicles with the fresh air/recirculation switch,
recirculated air can be selected either with the
switch or by setting the air selection switch to
maximum air conditioning.
5.
Move the temperature control switch counter-
clockwise for cool air. In this position, no heat is
given off by the heater.
6.
Turn the fan switch to the highest speed, 4.
7.
As soon as cool air is flowing from the dash-
board outlets, close the windows. Adjust the fan
switch setting as desired.
8.
If the air from the vents is too cold, move the
temperature control switch clockwise for warmer
air flow.
IMPORTANT: To prevent the buildup of fumes or
odors inside the cab (for example, from smok-
ing),
do not operate the heater and air condi-
tioning system in a recirculation mode for more
than 20 minutes.
Fresh Air
1.
Move the fresh air/recirculation switch to the
fresh air position. Move the air selection switch
to the desired position. See
Fig. 4.7
.
2.
Move the temperature control switch counter-
clockwise for no heating or clockwise for heat.
3.
Set the fan switch at the desired speed.
IMPORTANT: To prevent the buildup of fumes or
odors inside the cab (for example, from smok-
ing),
do not operate the heater or ventilation
system in a recirculation mode for more than 20
minutes.
Heating, Sleeper Heater and Air
Conditioner
1.
With the engine at operating temperature, set the
bunk fan switch on the cab climate control panel
to the middle position. See
Fig. 4.7
.
When the bunk fan switch in the middle position,
full control is given to the sleeper heater and air
conditioner climate control panel. The bunk fan is
off when the bunk fan switch is in the OFF posi-
tion. The bunk fan is on high when the bunk fan
switch is in the HI position.
NOTE: Whenever the refrigerant compressor is
operating, the fan will always run at a very low
9/07/95
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1
2
3
4
5
6
1.
Fan Switch
2.
Air Conditioning Settings
3.
Face Only Setting (non-air conditioning)
4.
Temperature Control Switch
5.
Maximum Air Conditioning
6.
Fresh Air/Recirculation Switch
Fig. 4.11, Air Conditioning Settings
Heater and Air Conditioner
4.7
