Peterbilt 325 2017, Operator'S Manual

Page: 132 / 392

HEATING AND AIR CONDITIONING
Fresh Air/Recirculation
Switch
This switch controls the source of the air
flowing into the heater and air conditioner
unit
Recirculated air may reduce the amount
of time needed to cool down the interior of
the vehicle (when used with A/C) and may
also help reduce undesired outside odors
from reaching the interior of the vehicle.
This button can be engaged manually in
any non-defrost modes.
NOTE
You may notice changes in sound
between recirculated mode and
other airflow modes.
Tips for Efficient Cooling
An air conditioner can reduce fog build
up on the windshield by setting it to the
defrost or the floor/defrost air selection.
To increase the effectiveness of the
air conditioner, use the A/C button
in the ON position, increase the air
temperature setting and/or increase
the fan speed.
If the cabin becomes humid or damp,
use the air conditioner with the fan
on, with fresh air (not in recirculate air
mode) and the A/C in the ON position
to dry the cabin air.
In situations where more cooling of
the cab is required, make sure the
system is in the recirculation mode.
This setting will be more effective than
using fresh air.
How To Use The System
The engine must be running for the
heater and air conditioner to generate
hot and cold air.
To Cool
Push the Fresh
Air/Recirculation Switch to the
Fresh Air mode (Blue indicator
light off). Manually setting the
system to recirculate air will
increase the effectiveness and
uses the least amount of fuel.
Turn ON the Fan Control Dial to
the desired fan speed.
Turn Temperature Dial to Desired Setting.
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Y53-6060-1C1 (03/17)
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