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Ro/ls-Royce
&
Bentley
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Air
Conditioning
System
Manual
SECTION
C.2
OPERATING THE SYSTEM
The system
is
controlled by two switches mounted
on
the facia board
and
marked
'UPPER'
and
'LOWER'.
The
'UPPER'
switch controls the fresh air system
and
regulates the air entering the saloon from the
adjustable vents
on
either side
of
the capping rail
and
from the windscreen de-misting slots. This
switch has seven positions - four positions clock-
wise which control the heating system, and three
positions anti-clockwise which control the
refrigeration.
To obtain the desired condition when operating
the refrigeration, the switch must
be
rotated anti-
clockwise.
In the first position the evaporator flap will be
fully open and the heater flap fully closed; the
water tap will be closed
and
the blower motor
operating
at
medium speed. This results in normal
ambient
air
enteri'ng the saloon.
In
the second position both the evaporator flap
and
the
heater flap will be fully open; the water
tap will be closed, the compressor operating and
the blower motor running
at
medium speed. The
result
is
a mixture
of
ambient
and
refrigerated air
passing from the top half
of
the heater matrix and
the upper evaporator unit.
In the third position the evaporator flap will be
fully open, the heater flap will be fully closed, the
water tap
will be closed, the compressor operating
and the blower motor at medium speed. This
results
in
cold air entering the saloon via the
upper
evaporator.
If
the
knob
of
the
'UPPER'
switch is pulled out
whilst
turned
to any
of
its positions,
the
blower
motor
operates
at
full speed.
The
'v;>WER'
switch controls the recirculating
system
and
has
five
positions.
Three
positions
clockwise control the heating system
and
the two
positions anti-clockwise control the refrigeration
system.
In
the
first position anti-clockwise
the
water
tap
will be closed, the compressor operating and
the blower motor at medium speed. This results
in cold recirculated air entering the saloon via the
lower evaporator.
In
the second position anti-clockwise the water
tap
will be closed, the compressor operating and
the
blower
motor
at
full speed. This results
in
recirculated air
of
minimum temperature entering
the saloon.
Page 5
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