SECTION 22: HEATING AND AIR CONDITIONING
DOB 2490-2789 | X3-45 Commuter PA1605 Maintenance Manual (Final Version – Rev.2 April 2016)
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1. HEATING AND AIR CONDITIONING SYSTEM OVERVIEW
The vehicle is equipped with a central HVAC system. Air flow and controls divide the vehicle in two areas:
driver’s area and passengers’ area. The interior of the vehicle should always be slightly pressurized to
prevent dust and moisture from entering vehicle. Each section has its own fresh air, returning air and
discharge air ducting. The exhaust is mainly done through the rear ventilator and through normal air-
tightness losses.
NOTE
Air conditioning
Air conditioning is the artificial treatment of air to render the living conditions of persons
more
comfortable and healthful
. Complete air conditioning involves adjustment and control of following
operations performed on the air supply :
1) heating or cooling;
2) dehumidification;
3) ventilation;
4) Filtering;
FIGURE 1: PASSENGERS’ UNIT AIR CIRCULATION
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FIGURE 2: HEATING CIRCUIT
