is turned on, the amber indicator on the recirculation
switch will illuminate.
The recirculation switch will not work when the mode
control switch is in either defog or defrost modes.
IMPORTANT: To prevent the buildup of fumes or
odors inside the cab (for example, from smok-
ing) do not operate the heater and air condition-
ing system in recirculation mode for more than
20 minutes.
Bunk Override Switch
The bunk override switch, equipped on sleeper cabs
only, allows the driver to control sleeper heat and
A/C settings from the cab. Press the bunk override
switch to turn the sleeper heat or A/C on. An amber
indicator will illuminate when bunk override mode is
activated.
Press the bunk override switch again to turn bunk
override mode off. Adjusting the sleeper climate con-
trols at any time will also cause the bunk override
mode to cancel.
Sleeper Climate Control Panel
An auxiliary heater and air conditioner unit is stan-
dard when there is a sleeper compartment. The unit
is installed in the right side sleeper baggage com-
partment and uses the cab’s refrigerant liquid system
for air conditioner operation. The unit is equipped
with a separate evaporator coil, expansion valve, and
fan. It is also equipped with its own heater core and
water valve, independent of the cab heater. The aux-
iliary unit’s climate control panel is mounted on the
right rear wall or the rear overhead storage compart-
ment.
The standard sleeper climate control panel has a fan
control knob and a temperature control knob. See
Fig. 6.2.
If the bunk override switch has been activated, the
override mode can be canceled by changing the
sleeper fan speed or temperature setting. The cli-
mate control system will then operate from the
sleeper controls.
When the climate control unit is set for fresh air, 300
cubic feet per minute of air is provided to the sleeper
and stale air is exhausted through a vent in the left
rear area of the sleeper. When the system is acti-
vated, fresh air rapidly displaces stale air as the cab
pressurizes.
Fan Control Knob
The fan control knob activates the fan, which forces
air through the air outlets. The fan control knob has
eight fan speeds and an OFF position.
To operate the fan control knob, turn the knob clock-
wise to increase airflow, or counterclockwise to de-
crease airflow.
IMPORTANT: To prevent the buildup of fumes or
odors inside the sleeper (for example, from
smoking) do not operate the heater and air con-
ditioning system in recirculation mode for more
than 20 minutes.
NOTE: When the cab air conditioner (A/C) is on,
the sleeper fan will operate at low speed even if
05/04/2012 f611184
1
2
3
4
5
6
7
1. Clock
2. Sound System Volume Knob
3. Fan Control Knob
4. Reading Light
5. Temperature Control Knob
6. Dome Light Switch
7. Power Receptacle
Fig. 6.2, Sleeper Climate Control Panel
Climate Control
6.2
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