18
HEATING
AND VENTILATION CONTROLS
Air circulation in the passenger compartment is achieved
by
the intake
of
fresh air through the heating and ventil-
ation system and
by
extraction through the openings in
the rear corner posts. These openings are connected
to
outlets in the sides
of
the
body
(see illustration).
The intake
of
air
into the
car
is regulated
by
adjust-
ment of controls marked DEFR and VENT on the instru-
ment
panel.
The TEMP control which acts on the thermostatically
operated water valve
is
used to regulate the temperature
of the i
ncoming
air. The thermostat compensates
for
variations in air velocity and in water temperature so as
to maintain the incoming air at a constant temperature
corresponding to the
control setting. Maximum heat is
obtained
if
the knob
is
turned clockwise to the red stop.
There is no heating effect when the knob is
turned
in the
opposite di rection
to
the white mark.
The knob marked DEFR regulates the
flow
of
air
to
the
windshield and the front side windows. Full
flow
is
ob-
tained when the knob
is
in the horizontal position. The
air
flow
is
cut
off
by setting the knob in the vertical posi-
tion.
The knob marked VENT
controls the supply
of
air
to
the front
floor
area. Here too, the horizontal
and
vertical
positions correspond to open and shut respectively.
Diagram showing the heating and venti
la
tion system
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