Peterbilt Model 320 Operator's Manual after 8-07 - Peterbilt Motors ...

PART 4: CONTROLS AND DISPLAYS
Heating And Air Conditioning Controls
CAUTION: Never idle your vehicle for prolonged
periods of time if you sense that exhaust fumes
are entering the cab. Investigate the cause of
the fumes and correct it as soon as possible.
If the vehicle must be driven under these conditions,
drive only with the windows slightly
open. Failure to repair the source of the exhaust
fumes may lead to personal harm.
NOTE: Keep the engine exhaust system and the
vehicle’s ventilation system properly maintained. It
is recommended that the vehicle’s exhaust system
and cab be inspected
• by a competent technician every 15,000 miles
• when a change is noticed in the sound of the
exhaust system
• if the exhaust system, underbody, or cab is damaged
NOTE: To allow for proper operation of the vehicle
ventilation system, keep the inlet grille at the
base of the windshield clear of snow, ice, leaves
and other obstructions at all times.
NOTE: Do not stay in the vehicle with the engine
running or idling for more than 10 minutes with
the vehicle’s Heater / AC ventilation system in
RECIRC or at LOW FAN SPEED. Even with the
ventilation system On, running the engine while
parked or stopped for prolonged periods of time is
not recommended.
NOTE: If you are required to idle your vehicle for
long periods of time, install an auxiliary heater or
automatic idle control. These auxiliary devices can
reduce fuel consumption and save you money.
NOTE: When idling for short periods of time
• Set the heating or cooling system to Heat or A/C
• Set the fan to Medium or High speed
• Set the controls to FRESH AIR
NOTE: If other vehicles are parked next to you
idling, move your vehicle or do not stay in your
vehicle for prolonged periods of time.
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