Air
Conditioning
System
Manual
-------Ro/1$-Royce
&
Bentley------------
1st
anti-clockwise
Evaporator
Flap
Heater
Flap
Water
Tap
..
Blower
Motor
FULLY
OPEN
CLOSED
CLOSED
MEDIUM
SPEED
Providing
Air
of
ambient
temperature
entering the car.
2nd anti-clockwise
Evaporator
Flap
Heater
Flap
Water
Tap
..
Compressor
Blower
Motor
FULLY
OPEN
FULLY
OPEN
CLOSED
OPERATING
MEDIUM
SPEED
Providing
Ambient
and
cold
air
flow via the
upper
heater
and
upper evaporator matrices.
3rd anti-clockwise
Evaporator
Flap
Heater
Flap
Water
Tap
..
Compressor
Blower Motor
FULLY
OPEN
CLOSED
CLOSED
OPERATING
MEDIUM
SPEED
Providing
Air
of
minimum
temperature
entering the car via the upper evaporator
matrix.
N.B.
If
the
switch knob is pulled out, the blower
motor operates
at
FULL
SPEED.
LOWER AIRSTREAM SWITCH
This switch
controls
the recirculatory blower
motor, the water tap actuator and the compressor
clutch.
Six positions are utilised - the vertical
or
OFF
position, three positions clockwise
and
two posi-
tions anti-clockwise.
The
construction
and
operation
of
the
mechanism
is
similar
to
that
of
the
upper
air-
stream switch except that no 'pull-out' mechanism
PageS
is
provided
for
blower
motor
full
speed
- full
speed is only obtained in position three clockwise
and
position two anti-clockwise.
Lobes
on
four sets
of
moving contacts complete
circuits with combinations
of
the nine sets
of
fixed
contacts.
A numbered disc is attached to the rear
of
the
switch to assist terminal identification; the key
to
these numbers
is
as
follows:-
Terminal Number
l Recirculation Blower Motor Full Speed.
2 Recirculation Blower Motor Medium Speed.
3 Supply.
4 Water
Tap
'Leak'.
5 Supply from Upper Airstream Switch No. I
Terminal.
7 Water
Tap
Closed.
8 Supply from Upper Airstream Switch No. 7
Terminal.
9 Compressor Clutch 'In'.
11
Water
Tap
Open.
Note: The system will
not
provide warm fresh
air
and
cold recirculated air simultaneously.
If
the
lower
airstream
switch is
in
a 'cold'
position
(anti-clockwise)
the
water
tap
remains
closed for all positions
of
the upper airstream
switch, either clockwise
or
anti-clockwise.
If
the
Jower
airstream
switch is 'off'
or
in
position I clockwise, the
upper
airstream
switch
selects water
tap
leak
for all clockwise positions.
If
the lower airstream switch
is
in positions 2
or
3
clockwise, the upper airstrearn switch selects water
tap
open for all clockwise positions.
Switch
positio,u
1st
clockwise
Water
Tap
..
Blower
Motor
LEAK
POSITION
MEDIUM
SPEED
Providing
Warm
recirculated air.
2nd
clock
wise
Water
Tap
..
Blower
Motor
OPEN
MEDIUM
SPEED
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