------------
Rolls-Royce
&
Bentley-------
Air
Conditioning
System
Manual
the wing
and
boosted, by means
of
a blower
motor, through the upper evaporator matrix
and/or
the top half
of
the heater matrix.
The
air
is delivered
into
the saloon through the capping
rail adjustable outlets
and
the windscreen
de-misting slots.
The recirculating air is ducted from the air
intake, situated behind the right-hand front seat,
and
b~osted,
by
means
of
a blower motor,
through the lower evaporator matrix
and
the
lower half
of
the heater matrix.
It
then enters the
saloon via the cross duct under the facia, the
adjustable
duct
under
the
front
picnic tray,
and
the
duct
on
the left-hand side
of
the scuttle.
To
prevent
the
temperature
of
the
air
passing
through the evaporator falling below freezing
point
and
the system becoming blocked by the
formation
of
ice, a thermostatic switch is fitted
to
each matrix:
and
is used in
conjunction
with the
solenoid valves to control the
flow
of
refrigerant.
If
both
solenoid valves are closed, the refrigerant
is
by-passed from the condenser back to the com-
pressor through the
flow
control valve.
The
con-
trol valve is adjusted to maintain a minimum
pressure
of
2 lb./sq. in. in
the
low pressure side
of
the system. The thermostatic switches control the
minimum temperature
of
the evaporators and
must
not
be
~et
below 2"C., otherwise icing may
occur.
Page3
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