Heating And Ventilation Systems Controls; Optional Air Conditioning; Air Conditioning Switch; Fan Control Knob - Isuzu NPR 2008 Owner's Manual

N-series medium duty truck (low cab forward)

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55702_Sec02-2_'08 08.2.12 9:46 AM Page 59

HEATING AND VENTILATION SYSTEMS

CAUTION: See "Engine Exhaust Gas Caution (Carbon Monoxide)"

in Section 2.

This system combines cooling capabilities for comfort in all weather

conditions.

During some air conditioning operating conditions, slight increases

and decreases of engine speed/power may be experienced. This

should be considered normal, as the system is designed to cycle the

compressor ON and OFF to maintain desired cooling. The reduced

compressor operation should benefit fuel economy.

3. Temperature Control Knob.

4. Air-source Selector Lever.

5. Air Selector Knob.

1. AIR CONDITIONING SWITCH (If equipped)

Push this switch to operate the air conditioning system. The light-

emitting diode in this switch lights up as the system is operating. To

turn off the air conditioning, push this switch in again.

Air conditioning will not operate without the fan control lever in one

of the "ON" positions.

2. FAN CONTROL KNOB

The fan control knob (OFF-1-2-3-4) provides speed control of the

blower fan in all Air Selector Knob positions.

CONTROLS

2-59

Use Bi-Level in this range

for giving cool air upward

and warm air downward.

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