Volvo VNL 780 Operator's Manual page 131

MCC Air Distribution
Always allow the dashboard vents (see arrows in illustration) to remain open. Irrespective of
how the air distribution is set, a small amount of air will always come from the dashboard
vents to ensure the temperature in the cab is correct.
Note: Floor Mode: Unheated air is leaked to
the panel vent to balance the heat rising from
the floor.
DANGER
Diesel engine exhaust and some of
its content are known to the state of
California to cause cancer, birth defects
or other reproductive harm.
INSTRUMENTS AND CONTROLS
W8003110
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