PART 4: CONTROLS AND DISPLAYS
DASH-MOUNTED FEATURES
(R05/10)
Y53-6032
– 57 –
and safe driving, it is extremely important for
you to follow the instructions pertaining to
the function and use of the ventilation/heating
and defogging/defrosting system. If in doubt,
consult your dealer. Maximum heating output
and fast defrosting can be obtained only after
the engine has reached operating tempera-
ture.
CAUTION: During extreme cold weather, do not
blow hot defroster air onto cold windshields.
This could crack the glass. Turn the air flow con-
trol lever to Defrost and adjust the fan speed
accordingly while the engine warms. If the
engine is already warm, move the temperature
selector to Cool, then gradually increase the
temperature when you see that the windshield is
starting to warm up.
•
To defog the windshield,
select the Defrost mode
and turn the blower speed to high. Set the tempera-
ture knob to hot (the red position on the control). The
air conditioner is automatically activated to remove
moisture from the cab. After the windshield is clear,
adjust the mode, blower speed, and temperature to
your comfort.
•
To cool the cab,
turn on the A/C switch, set the tem-
perature knob to cool (the blue position on the con-
trol), and the blower to high until the cab becomes
cool. Then you can turn down the blower if you wish.
For Efficient Cooling:
1. Be sure all heater - air conditioner controls are off.
2. Start the engine. Allow time for warm-up.
CAUTION:
• A cold compressor can cause refrigerant to
liquefy and warp the valve plates or cause a
hydraulic lock. Warm the engine before start-
ing the air conditioner.
• Turn off all controls when the system is not
in use. Doing so will avoid damage to the air
conditioning system components.
3. Set the air control in the RECIRC mode.
4. Close all windows.
5. Idle the engine between 1000 and 1500 RPM and
turn the blower speed control to high.
6. After the cab temperature cools to a comfortable level,
adjust the blower speed and controls to keep the
desired condition.
Y53-6032.book Page 57 Monday, May 24, 2010 3:37 PM
Summary of Contents for Peterbilt 587
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