Hvac System Overview - PREVOST H3-41 Maintenance Manual

2.

HVAC SYSTEM OVERVIEW

The vehicle interior is pressurized by its Heating Ventilation and Air Conditioning (HVAC) system. Two
HVAC systems are available: Small HVAC System and Central HVAC System.
Small HVAC System
Central HVAC System
If 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. Each section has its own fresh air, returning air and discharge
air ducting. Each section has its own evaporator coil and heater core but both sections share the same
condenser
The exhaust is mainly done through the lavatory 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
operations performed on the air supply :
Heating or cooling; Dehumidification; Ventilation; Filtering;
Driver's unit only
•
• Driver's unit with auxiliary system (H3 VIP only)
• Driver's unit and passengers' unit with optional overhead compartment
A/C system and optional upper windshield defrost unit
. Complete air conditioning involves adjustment and control of following
PA1621 Maintenance Manual All Series | Revised February 2019
SECTION 22: HEATING AND AIR CONDITIONING
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