300Tdi Discovery
80
HEATING AND VENTILATION
2
DESCRIPTION AND OPERATION
Through-flow ventilation
Through-flow ventilation is achieved by means of
one-way air extraction vents incorporated in both rear
quarter body panels. The vents open and close
automatically dependent upon the heating and
ventilation unit control settings and the volume of air
entering the vehicle.
Heating and ventilation unit, controls
The Heating and Ventilation Unit is centrally located
and concealed by the dash assembly. When air
conditioning is fitted, an evaporator is mounted in the
heater unit forward of the heater matrix.
The dash mounted central controls are used to
operate both systems. A single switch controls the air
conditioning unit when fitted.
Controls set for maximum heat to footwells and face level vents
Heating and ventilation flaps and air flow key
1. Fresh or recirculated air from blower unit
2. Evaporator matrix - air conditioning (when fitted)
3. Heater matrix
4. Air outlet front footwells
5. Air outlet to rear footwells
6. Air outlet face level vents
7. Air outlets screen de-mist
8. Control flap - face level vents
9. Control flap - demist vents
10. Control flap - air direction
11. Control flap - air temperature
12. Control flap - air direction