30
Cabin Heating and Ventilation Systems
Heating System
A powerful and comprehensive heating system of 4-1/2 Kw output is fitted, and this allows any
combination of temperature and air flow to be selected and maintained.
The car interior is heated by fresh air drawn from outside the car and passed over a radiator matrix
supplied with hot water from the engine. Therefore the heater will not be fully effective until the engine
has reached its normal operating temperature.
Controls
There are three main heater controls :—
1) Air cut-off control.
This is mounted on the scuttle below the steering wheel and controls
the air passing into the heater. This valve is opened by moving the knob down.
2) Distribution control.
This is on the left hand side of the central facia lower, flanking the
grille. Its position determines whether air from the heater is directed towards the windscreen,
or into the car interior. With the control at ‘INT’, air flow is directed into the front and rear
footwells and also through the grille in the facia lower. If the control is set to ‘DEMIST’, flow
is directed to the windscreen.
3) Temperature control.
This is on the right hand side of the facia lower, opposite the
Distribution control. Once the desired temperature is set, it is maintained by a thermostatic
valve in the water system, regardless of the engine coolant temperature, or the car speed.
4) Fan.
The flow of air from the heater can be supplemented by a two speed fan, controlled by
a switch on the facia. With the switch half way down, slow speed is selected ; moving it fully
down increases the fan speed.
Ventilation Systems
Two completely independent ventilation systems are built into the car.
1) Footwell Ventilation.
Small sliding panels on the outside of each footwell are connected
to intakes below the headlights. Opening these panels provides a flow of air dependent on
the speed of the car.
2) Face level Ventilation.
Two spherical air vents are mounted in the facia, which provide
fresh air from the scuttle intake. These are opened by pulling out the nozzles. A booster fan
is fitted to supplement fresh air output and is controlled by the switch marked “Air” on the
facia.
