Volvo VNL Operator's Manual page 189

184 Heating and Air Conditioning
Sleeper Climate Unit With ATC
The ATC panel is located on the left side,
behind the driver seat and contains a tem-
perature control, fan speed control and
other controls.
To use the heater, with the engine running
and the air conditioning button on the main
control panel in the off position, turn the
fan speed control (1) and the temperature
control (2) to the positions that give the de-
sired temperature output.
To use the air conditioning, the engine
must be running. Press in either the manual
air conditioning button (with manual A/C,
the fan switch must be at least on speed 1)
or the ATC button on the main control
panel in the dash. The ATC control unit for
the sleeper climate system will keep the
temperature output to where the tempera-
ture control was set. However, the fan
speed may also have to be adjusted, in-
creasing or decreasing air flow, to achieve
correct cab temperature.
The air conditioning works together with
the heater to give the desired temperature
output. Use the temperature control (2) to
adjust the output air temperature by turning
the control counterclockwise (toward the
blue field) for colder air and clockwise (to-
ward the red field) for less cold air. Also
use the fan speed control (1) to alter the
amount of air flow.
Panel in VN-420, 610 and 660
Panel in VN-770
W8002038
W8002014