Rolls-Royce Silver Cloud II, Bentley S2 User Manual

~,

Air

Conditioning

Manual

System

AIR CONDITIONING

(REFRIGERATION)

Printed in Great Britain

by

William Hodge & Chilver Limi1ed, London

PREFACE

The

primary purpose
refrigeration engineer with information necessary to enable him
to service and maintain the Rolls-Royce Refrigeration System.
The Manual will also be
engineer wishing to familiarise himself with the function and

of

position

Contained herein is a description
comprehensive instructions for the maintenance, dismantling
and

assembly
procedure. All special tools required to carry
tions are listed and illustrated.

Although all information provided within the Manual was
correct when going to print, additions or modifications may
subsequently be necessary. These
of

the reader by means

mended that a note be made in the appropriate Section

Manual, referring to the latest Bulletin.

Advice
problems will always be available
Department
be accompanied by the chassis number

the various components.

of

each unit, together with the necessary service

and

assistance regarding maintenance

at

Pym's Lane, Crewe; all such enquiries should

of

thi~ Manual is to provide the

of

great assistance to

will be brought

of

Service Bulletins,

on

application to the Service

of

of

the

motor

the system and

out

service opera-

to

the notice

and

it is recom-

and

the car.

car

of

the

servicing

AIR CONDITIONING

REFRIGERATION

UNDERWING

UNIT

INTRODUCTION

The underwing air conditioning system fitted to Standard Steel

and

Saloon Rolls-Royce Silver Cloud II
provides de-misting, de-frosting,

Bentley S.2 motor cars

car

heating

and

ventilation.

Alternatively, a comprehensive underwing refrigeration system,

providing a wide range

heating

and

cooling conditions, can

of

be installed at the customer's request.

of

the

Whilst servicing

standard
system may be undertaken with confidence by
service engineer,

of

tenance

the refrigeration system will be better effected by a

it

must be appreciated that correct main-

heating

and

the

de-misting

normal

specialised refrigeration engineer.

Special equipment

un<lenaking
always
sealed

scrvidng

remembered that

and

pressurised.
unnecessarily as
breaking any joint, unless this

The Refrigeration System, although

and

precautions are necessary when

and

overhaul
the

Thus

the

system must be discharged prior to

operations

refrigerant

join

ls

should not

is

protected by service valves.

an

and

it

circulation system is

bl!

optional extra, is in

should

disturbed

be

fact not an isolated unit, but a large system carefully integrated

of

into the design
cases, is combined in
mechanical

installed in positions promoting simplicity
facilitation

of

the motor car. The electrical wiring, in most

th~ main wiring looms

and

electro•mechanical control units have been

and

of

operation

the individual

servicing.

and

the

A I/ enquiries should be addressed

to:-

ROLLS-ROYCE

Pym's Lane

Crewe

Cheshire

Telephone:

Crewe

"ROYCRU,

55155

Telegrams:

CREWE"

LIMITED

T.S.D. Publication 123

Printed in England

CONTENTS

DESCRIPTION SECTION C. l
OPERATING
ELECTRICAL
COMPRESSOR, CONTROL VALVES AND ANCILLARY

UNITS . . SECTION
MAINTENANCE
SERVICING

THE

. . SECTION C.6

SYSTEM SECTION C.2

COMPONENTS . . SECTION

SECTION

C.3

C.4
C.5

INDEX

r--,

~

-

al

....

'

M

r--,

0

v.i

i,..;

Description

Operating
Electrical

Actuators

Blower motors
Evaporator change-over relay
Lower airstream switch
Magnetic
Rear
Resistances - blower motors
Solenoid valves
Thermostatic switches
Upper airstream switch

The

Compressor

Condenser
Drier
Expansion valves
Flow
Magnetic clutch

the

system

components

..

To

adjust

clutch

- compressor

window de-mister relay

compreMor,

Fault

Lubricant
Oil level ­Shal\
To

purge the

To remove

control

control

diagnosis

lo

check

seal - to replace

air

and

fit

valve

..

valves

..

..

..

and

ancillary

unil.8

10

13

12

II

12

13

II

IS

17
17
17

18
IS

18

19
19

20

15

9

8

9

7

15

To

remove

and

fit

5

Receiver ..

Maintenance

Schedules

Every 2,500 miles
Every 5,000 miles
Every 10,000 miles

Servicing

Charging the system
Checking for leaks 29

Discharging the refrigerant
Evacuating the system
Fault diagnosis

Air
Fault
Pressure tests
Refrigerant circulation
Superheat test

Importance

Sealing

Precautions

Exposure to refrigerant

First-aid
Right-hand front
Special tools required
Sweeping the system

Underwing

To

..

delivery

location

of

treatment

fit

or

annually

..

of

chemical stability

components

to

be observed

wing

-

unit

- to

remove

to

remove

16
18

21
21
21
21

28

26
27

23

24
24

26
24

26
23
23

23

23

23

29
23

27

30
30

CONDENS

EP.

F

RESH

WMM

TO

CAR INTERIOR

AIR

P.ECIRCULATEO

AI R

TO

REAR

OR COO

L

WARM

OR

COMPARTMENT

COOL

RE

CIRCULATED WMM

AIR TO F

RONT

FILTER

OR

COMPARTMENT

COO

BLOWER

L

HOTOR

EXPANSION VALVE

FLOW CONTP.

/

EVAPOR

OL VALVE

I '

HE

ATER FLAP

F

LAP

ACTUATO

ATOR MATRIX

RS

REC

AIR

IRCULATI

INTA

KE

NG

Fig,

l '

The

air

condiliomn8

SOLENOIDE VALVE

sy•ten:,

EVAPORATOR MATR

IX

FRESH AIR

RECIRCULATED

-

AIR

-

Rolls-Royce &

Bentley-------

Air Conditioning

Sy.stem

Manual

The function
Unit

is

to

maintain

and

humidity

conditions.

The

unit

air system,

of

the

Rolls-Royce

the

car

at

a comfortable level

is

divided

and

into

the recirculatory system; these

PHIAL

Air

interior

two

parts -the

in

SECTION

DESCRIPTION

Conditioning

temperature

all climatic

fresh

C.l

may

be

operated

order

to

produce

air system

introduces
temperature
circulatory system draws air from
conditions

it,

COMPRESSOR

independently or

the

desired condition.

heated,

air

into

the

and

re-introdu

I

cooled

car

interior; the

ces it.

together

or

the

car interior,

COND

ENS

~

The

fresh

ambient

ER

in

re-

EV

APORATOR MATRIX

CO

TEMPERATURE

NTROL PHIAL

-4===

EVAPORATOR MATR

L.P. VAPOUlll D

H.

P.

VAPOUR •

H.P.

LIQUID

/

•

~

IX

VALVE

~

SOLE

NOI

D VALVE

VALVE

/

SOLENOID VAL

Ft1, 2 Dla«r•m

VE

of

refrigerant

FLOW

co~

ORI~

circ11l•tion

VALVE

es

P

,

age

1

Air

Conditioning

-------

Rolls-Royce & Bentley

Sy.stem Manual

The

main
although recirculation enables the air conditioning
system to operate more effectively, the
simultaneous introduction
adequate
driven with

In

countries where humidity

extract

will
the air;
in conjunction with the refrigeration system to
provide warm,

and

cool

Fine

gauze .filters incorporated in the recircula-

tion

and

the ingress

advantage

ventilation, permitting the

the

windows closed.

a large

if

necessary,

of

this feature is that

of

proportion

the

heater may

fresh

air

car

is

high, the unit

of

moisture from

provides

to

be

used

dry air when the atmosphere is

damp

.

fresh air intakes (see Fig. 1), prevent

of

grit

and

other foreign particle

s.

be

------------

0

"'

.....

The

refrigeration
principle: after being compressed
pressor, the refrigerant passes
then

in

liquid

and

then evaporates in a matrix before returning

form

sys

tem

operates

to

to

a valve where

on

a cyclic

in

the com-

a condenser and

it

expands

to the compressor.

During evaporation,

the air

passing
thus enters the
at

reduced humidity, since a proportion

water va

pour

over

car

in

cooling process

the

gas absorbs heat from

the

matrix surface.

at

a reduced temperature, also

The

of

air

the

the air will condense during the

and

drain away through drain

holes provided.

The system

(Dichlorodifluoromethane) circulated

pressor.

is

charged with Freon

The

compressor is driven

12

refrigerant

by

the com-

via

a magnetic

clutch by Vee belts from the coolant pump pulley.

The

compressor

condenser mounted in front
matrix,

A series

where

the

of

pipes incorporating receiver, drier,
solenoid valves
condenser to the evaporator unit

delivers refrigerant

of

the engine radiator

gas is condensed to liquid.

and

expansion valves connects the

s.

to

the

H

IGH

PRESSURE SER.VICE VALVE

2

LOW PRESSURE SERVICE

CO

MPRESSOR

IMPORTANT:

Fig.

3 Compre&&or

The

refrigerant
valves before entering
resultant pressure

ar;id

vaporise

through

Air

is ducted to the evaporators by two systems:

From

right-hand

so absorb

the matrices.

the air

intake

wing, fresh air is ducted along inside

OIL Flll

Ref

er

to co

for

instructions regarding the

removal

of

is

atomised in the expansion

the

drop

heat

situated

VALVE

ER

PLUG

mpr

essor

deta

this

plug

.

in

po@ition

evaporators, where the

permits

from

at

the

the

the

ilr

liquid to

air

passing

front

of

the

Page2

------------

the wing

and

boosted, by means

Rolls-Royce

of

a blower

motor, through the upper evaporator matrix

and/or
is delivered
rail adjustable outlets

the top half

into

the saloon through the capping

of

the heater matrix.

and

the windscreen

The

air

de-misting slots.

The recirculating air is ducted from the air

intake, situated behind the right-hand front seat,

and

b~osted,
through the lower evaporator matrix
lower half

by

means

of

the heater matrix.

of

a blower motor,

It

then enters the

and

the

saloon via the cross duct under the facia, the

duct

adjustable
the

duct

on

under

the left-hand side

the

front

of

picnic tray,
the scuttle.

and

Air

&

Bentley-------

To

prevent

the

temperature

Conditioning

System

of

the

Manual

air

through the evaporator falling below freezing

and

point
formation
each matrix:
solenoid valves to control the

If

both

is

by-passed from the condenser back to the com-

pressor through the

the system becoming blocked by the

of

ice, a thermostatic switch is fitted

and

is used in

conjunction

flow

of

refrigerant.

solenoid valves are closed, the refrigerant

flow

control valve.
trol valve is adjusted to maintain a minimum
pressure

of

2 lb./sq. in. in

the

low pressure side

the system. The thermostatic switches control the

of

minimum temperature
must

not

be

~et

below 2"C., otherwise icing may

the evaporators and

occur.

passing

with the

The

con-

to

of

Page3

LOWER
AIRSTREAM
SWITCH

UPPER
AI

RSTREAM

SWITCH

---

FEED
TEMP,

FR.OM

COOLANT

INDICATOR

.....-11

,I

l ~cl

)

~5

l

wr',

-te --

:i;iel

.

~ ,

' , i 8

7

1

:

(')

~

""(

..,

..

-·

Fig. " Wii·ing

8

diagram -Air

conditioning

-

M:Y81nn

l

.,.,.-

REC

IRCULATING Al

\

193

<

l\

RESISTANCE

~

l'D

3

~

Q

:i

C:

Q

-

n

0

:i

Q.

~

-.

0

:i

-.

:i

OQ

TO

REAR

DE·MISTER

---...:•.;.•

Io

o o o

rll-

L..

I

DISTRIBUTION BOARD -

WINDOW

I;;.

::

~ ERMINAL STIii -

".I.

RECIRCULATING

All\6LOWE

---

R_E_A

-------

c:.R ____

~

___

FRESH
MOTOR

~ 7

~

....;.

AIR

BLOWER

RESISTANCE

LO_O.:..M

______

-~

-

rr===============(._J====:::!.1

.....

....

DE-tt1STl:R

CROSS

,,,~,o;w

I

,-....

'I,

SOLENO
VAL.YES

..J (OWER- ' -

~

~

DUCT

j ~

\::'-=

aoiii,,,/..i,,_

~·

(,. .....

11

...

J~

.....

I~

L

..

I

-

FRESH
FLAP

TRANSFER

THERMOSTAT

~NGINE

COHPRESSOR

HEATER

FLAP

ACTUATOR

· ~

ACTUATOR

DUC

T

LOOM

CLUTCH -

....

WATER

.--

ACTUATOI<

·~

.__"----=.1.:i

R.H. VALANCE LOOM

·--FRE

SH

~

TAP

__!E~r.:i~~~-.1

I

~:::r-"I

.,

'"'------

~

AIR BLOWER MOTOR

f===i'

•

, .

) l

1

Bl1B

L06lR/ £rL ·cnn.

------------

Ro/ls-Royce & Bentley

-------

Air

Conditioning

System

Manual

s

0\

-

o:i

SECTION

OPERATING THE SYSTEM

The system
on

the facia board

'LOWER'.

The

and

regulates the air entering the saloon from the
adjustable vents
and

from the windscreen de-misting slots. This
switch has seven positions - four positions clock­wise which control the heating system, and three
positions anti-clockwise which control the

is

'UPPER'

controlled by two switches mounted

and

marked

'UPPER'

and

switch controls the fresh air system

on

either side

of

the capping rail

C.2

In the third position the evaporator flap will be
fully open, the heater flap will be fully closed, the
water tap
and the blower motor at medium speed. This
results
upper

If
whilst
motor

will be closed, the compressor operating

in

cold air entering the saloon via the

evaporator.

the

knob

of

the

turned

to any

operates

'UPPER'

of

at

full speed.

switch is pulled out

its positions,

the

blower

refrigeration.

The

'v;>WER'

To obtain the desired condition when operating

be

the refrigeration, the switch must

rotated anti-

clockwise.

In the first position the evaporator flap will be

system

clockwise control the heating system

positions anti-clockwise control the refrigeration
system.

fully open and the heater flap fully closed; the
water tap will be closed
operating
ambient

I

In

and

at

medium speed. This results in normal

air

enteri'ng the saloon.

the second position both the evaporator flap

the

heater flap will be fully open; the water

and

the blower motor

tap
the blower motor at medium speed. This results
in cold recirculated air entering the saloon via the
lower evaporator.

tap will be closed, the compressor operating and

at

the blower motor running

result

is

a mixture

of

ambient
passing from the top half
the upper evaporator unit.

medium speed. The

and

refrigerated air

of

the heater matrix and

tap

the
recirculated air
the saloon.

and

In

the

will be closed, the compressor operating and

In

the second position anti-clockwise the water

will be closed, the compressor operating and

blower

switch controls the recirculating

has

five

positions.

Three

and

first position anti-clockwise

motor

at

full speed. This results

of

minimum temperature entering

positions

the two

the

water

in

Page 5

----------

- - Rolls-Royce &

SECTION C.3

ELECTRICAL COMPONENTS

Bentley--

- -

--

-

Air

Conditioning

System

Manual

UPPER

This switch controls

AIRSTREAM SWITCH

the

heater

and

evaporator

flap actuators, the fresh air blower motor, the

and

compressor clutch

the water tap actuator.

The switch utilises eight angular positions - the

or

OFF

vertical
and

three positions anti-clockwise.

In

all seven operating positions, with the switch

knob

'in',

position, four positions clockwise

the

fresh

air

blower

motor

operates at

medium speed.

When the switch knob is pulled outwards, all

seven conditions

are

duplicated but with

the

blower motor operating .at full speed. This
achieved by the provision
the end
two fixed

of

the switch spindle. This sleeve connects

contacts

when the

of a contact

knob

is pulled out-

sleeve

wards, thereby completing a new circuit by­passing the resistance.

The

main

switch mechanism consists basically

of

five

sets

of

moving contacts which rotate when

knob

is

the control
tact plates

'make'

turned. Lobes

and

fixed contacts spaced

'break'

around

on

these con-

with eleven sets

the

arc

of

travel

the contact Jobes.

A numbered disc is attached to the rear

switch for terminal identification, the

follows:-

is as

key

of

the

to which

Terminal Number

1 Water

2

Evaporator

Tap

'Leak'.

Flap

Closed.

3 Supply.

5 Heater Flap t Open.

6 Heater Flap Fully Open.

Tap

7 Water

Closed.

8 Heater Flap Closed.

9 Compressor Clutch 'In'.
10
11
12
13
14

Evaporator Flap Fully Open.
Blower Motor

Medium

Speed.

Blower Motor Full Speed.

Evaporator Flap t Open.
Evaporator Flap t Open.

Switch

1st

clockwise

positions

Evaporator
Heater
Water

Tap

Blower

Providing

Medium Speed.

readiness for

2nd clockwise

Evaporator

is

at

Heater
Water

Tap

Blower

Providing

air.

3rd clockwise

of
of

Evaporator

Heater
Water

Tap

Blower

Providing

temperature entering the car.

4th clockwise

Evaporator

Heater
Water
Blower

Providing

permitted

N.B. Knob pulled fully
blower motor operates

Flap

Flap

Motor

Normal

2nd

Flap

Flap

..

Motor

Mixed flow

Flap

Flap

..

Motor

As

Flap

Flap

Tap

..

Motor

by

FULLY

CLOSED

LEAK

MEDIUM

ambient

(Heater

Matrix warming in

position.)

!

OPEN

f

OPEN
LEAK
MEDIUM

of

ambient

J

OPEN

f

OPEN
LEAK
MEDIUM

above, but air

CLOSED

FULLY

LEAK
MEDIUM

Maximum

coolant

leak.

out

at

FULL

OPEN

POSITION

SPEED

air

POSITION

SPEED

POSITION

SPEED

of

OPEN

POSITION

SPEED

air

temperature

in

any

SPEED.

flow at

and

warm

increased

position-

Page

7

Air

Conditioning

System

1st

anti-clockwise
Evaporator
Heater
Water

Blower

Providing

Tap

Manual

Flap

Flap

..

Motor

Air

-------Ro/1$-Royce

of

FULLY

CLOSED
CLOSED
MEDIUM

ambient

OPEN

SPEED

temperature

entering the car.

2nd anti-clockwise

Evaporator
Heater
Water
Compressor
Blower

Providing

upper

Flap

Tap

Motor

Ambient

heater

Flap

..

and

FULLY
FULLY

CLOSED
OPERATING

MEDIUM

and

cold

OPEN

OPEN

SPEED

air

upper evaporator matrices.

flow via the

3rd anti-clockwise

Evaporator
Heater
Water

Compressor

Blower Motor

Providing

Flap

Tap

Flap

..

Air

of

minimum

FULLY

CLOSED
CLOSED

OPERATING

MEDIUM

OPEN

SPEED

temperature

entering the car via the upper evaporator

matrix.

N.B.

If

the

switch knob is pulled out, the blower

motor operates

LOWER AIRSTREAM SWITCH

This switch

at

FULL

controls

SPEED.

the recirculatory blower

motor, the water tap actuator and the compressor

clutch.

or

Six positions are utilised - the vertical

position, three positions clockwise

and

OFF

two posi-

tions anti-clockwise.

&

Bentley------------

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

circuits with combinations

of

moving contacts complete

of

the nine sets

of

fixed

contacts.

A numbered disc is attached to the rear
switch to assist terminal identification; the key
these numbers

is

as

follows:-

of

the

to

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.

Tap

7 Water

Closed.

8 Supply from Upper Airstream Switch No. 7

Terminal.

9 Compressor Clutch 'In'.

11

Water

Note: The system will

If

the

position

closed for all positions

switch, either clockwise

If

the

position I clockwise, the

selects water

If

the lower airstream switch

Tap

Open.

air

and

cold recirculated air simultaneously.

lower

airstream

(anti-clockwise)

Jower

airstream

tap

leak

not

provide warm fresh

switch is

the

water

of

the upper airstream

or

anti-clockwise.

switch is 'off'

upper

in

tap

airstream

a 'cold'

remains

or

in

switch

for all clockwise positions.

is

in positions 2

or

clockwise, the upper airstrearn switch selects water
tap

open for all clockwise positions.

Switch

positio,u

1st

clockwise

Water

Blower

Providing

Tap

Motor

..

Warm

LEAK

POSITION

MEDIUM

SPEED

recirculated air.

3

The

construction

mechanism

is

similar

and
to

that

operation

of

the

of

upper

the

air-

stream switch except that no 'pull-out' mechanism

PageS

2nd

Water
Blower

clock

wise

Tap

Motor

..

OPEN

MEDIUM

SPEED

- -

----------

Providing

Recirculated

temperature.

3rd' clockwise

Water
Blower

Providing

Tap

Motor

Recirculated

temperature.

1st

anti-clockwise

Water

Tap

..

Compressor

Blower

Providing

car

via

Motor

Cold recirculated air entering the

the

lower

2nd anti-clockwise

Water

Tap

..

Compressor

Blower

Motor

air

OPEN
FULL

air

CLOSED
OPERATING

MEDIUM

evaporator

CLOSED

OPERATING

FULL

Rolfs-Royce &

of

increased

SPEED

of

maximum

SPEED

matrix.

SPEED

Air

Bentley-------

of

Adjustment

varying

the

by means

of

the cut-off

tension

in

the

a vernier screw which is accessible
when the thermostat rubber end cover
(see Fig.

Setting
with the aid
Random
positive indication

5).

the

switch

of

a power source and indicator light.

operation

should

of

the setting screw, without

of

the 'make'

Conditioning

System

point

nickel steel members

be

Manual

is effected by

is

removed

attempted

or

'break'

only

of

contacts, may strain the internal assembly.

A locking clamp is provided to ensure that the
setting

remains

undisturbed

by vibrations,

should be adjusted so that the vernier screw may

turned

be

carried
since tightening

without

out

before final adjustment

undue

of

the locking screw after adjust-

strain; this

of

should

the switch,

ment may alter the setting.

should

Care

thermostat, since it
forms the operating element

be exercised in handling the

is

the outside shell which

and

distortion

of

shell may affect the operation.

the

and

be

this

Providing

temperature

Recirculated

entering

the

air

car

of

minimum

via

the

lower

evaporator matrix.

THERMOSTATIC SWITCHES

The Cartridge

silver contacts. attached to, but insulated

two special nickel steel members

co~fficient, mounted

Thermostat

under

tension in a seamless

consists

of

low expansion

of

from,

drawn brass tubular shell.

Changes in
expand
supports

or

to

the contacts

Two

thermostats

system,

each

valves which regulate the supply

temperature

cause

the

shell

contract, subjecting the steel contact

changes

to

of

tension, thereby causing

•make'

or

are

controlling

'break'.

incorporated
one

of

of

in the

the solenoid

refrigerant to

the evaporator matrices. When the temperature

the

air

leaving the matrices falls to a level a little

of

above freezing point; the flow

in

off,

order

to

prevent

the

refrigerant

matrices becoming

is

blocked by ice formation.

two

to

of

cut

ACTUATORS

The heater flap, evaporator

actuators

tap

are

identical

flap

units,

and

heater water

consisting

of

a
small electric motor driving through a reduction
gear train. The shaft carrying the final gear in the

train also carries a

contact

disc which has a

portion removed; this disc conveys current to the

motor
the

via

circuit

any

one

is

completed

of

four fixed

by

the

contacts,

upper

or

when

lower

airstream switch action.

of

Operation

rotate

until the

the motor causes the disc to

gap

in the disc reaches

the

con-

tact, thus breaking the circuit.

end

of

Attached to the

is

a crank lever. These crank levers are connected

by

links

to

sfmilar levers fixed

and

to

spindle
evaporator

extensions

flap spindles. The extension spindles

each actuator gear shaft

to

the

of

the

heater and

water

tap

protrude through the actuator mounting platform,
and

flexible couplings transmit the drive, through

in

holes

the valance, to the flap spindles. Rubber

sleeves are provided under the wing to protect the

flap driving mechanism.

Page9

Air

Conditioning

System

Manual

-------

Rolls-Royce & Bentley

hole

s,

on

the

--

-----------

locating

them

flap spindles.

on

the

driving

dogs

The

the

Fig

. 6).

are

mounted

along

water

forward

The

the

valance,

Fig. 5

tap
end
heater
together

Thermo81.ltic

actuator

of

the

and

evaporator

on

adjacent

right-hand

a single platform midway

fluid reservoir (see Fig. 7) ...

Actuators -to

Whenever

removed,

been

possibly

be

adjust

carried

the

out

adjust

underwing
it will be
the

actuator

after

the

wing

swilch

is

situated

low

down

valance

flap actuators

to

the

forward

unit

or

the

wing has

necessary

to

check

setting. This should

has

been

refitted.

at

(see

brake

and

4.

5.

Insert
slots in
mounting

Push
coupling
lever

the

extension

the

coupling

platform

the

extension
tubes

clamping

spindles.

6.

7.

Slowly

about
screws
faces

Detach

shafts

means

withdraw

n;

in. and

to

lock

of

the

the

and

rotate

of

their

bearing

two

should be free to rotate

ment

through a larger

the coupling tubes are
the

dogs

on

the

rectified.

8.

Ensure

switc

on

seconds

hes

the

that

the

are

ignition

to

allow

and

bolts

tighten

the

crank

the

crank

spindles

upper

in

the

spindle

tubes

to

the

valance.

spindles

tighten

on

to

the

extension

the

collars

tubes

against

.

levers

extension

arms. The

through

angle

not

and

and

lower

OFF

position

for

approximately

the

actuator

dogs

into

and secure

fully

into

the

two

crank

the

extension

spindles

Allen

grub-

the

from

the

gear

spindles

spindles

90 °. Move-

indicates
engaged with
this

should

airstream
. Switch

motors

the
the

the

end

by

that

be

30

to

The

procedure

noting

if

the

l.

that

wing

Slacken
crank
gear
grubscrews
extension

2.

Remove
ing
form
rear

3.

Move
platform
the two coupling

Page

JO

to

instructions

only

has

the

levers

shafts,

securing

spindles.

the

the

forward

to

the

valance

securing

the

forward

away

be

been

four

to

the

also

single

end

nuts.

from

tubes

adopted

2, 3

is as follows,

and 4 do

removed: -

bolts which

extension

slacken

nut and

of

end

the

the

the

and

valance

the
collars

washer

mounting

slacken

of

the

through

not

apply

clamp

spindles

two

Allen

to

secur-

plat-

the

mounting

and

insert

the valance

the

and

the

two

Fi8

, 6

Water

tap

and

actuator

------------

Rofls-Royce & Bentley-------

Air

Conditioning

System

Manual

rotate
then
actuators

Evaporator

I.

Rotate

to the fully closed position.

be

necessary

separately as follows: -

flap

actuator

the extension spindle anti-clockwise

(when viewed over the left-hand wing) until
resistance is encountered.

2.

Slightly slacken

bolt

and

rotate

slopes forward

3. Place

4.

the

position

Adjust
so

that

gear

on

the

when the gear shafi crank is rotated
clockwise
countered
of

the

fully

cates

that

the flap is being pressed tightly

into

its fully closed position).
clamping bolt to lock
crank.

5.

Rotate
rearward
gear

the

end

shaft

are parallel) then tighten the clamping bolt.

Heater

I.

flap

actuator

Rotate

the
(when viewed over the left-hand wing) until
resistance is encountered.

2. Slightly slacken

bolt

and

rotate

slopes 60°
ward

position.

It

to

adjust

the

crank

the

crank

and

upward

shaft

the

gear shaft.

position

on

the

crank

of

shaft,

lever loosely

the extension crank

resistance

for a few degrees

rearward

position. (This indi-

the

lever

clamping

lever until

at

45 °.

to

each

is en-

Tighten

the

extension spindle

gear

shaft

of

crank

its
and

crank

stroke

the

to

the

(i.e.

when

connecting

extension spindle clockwise

the

the

forward

crank

of

crank

the

lever

clamping

lever until

vertical

down

will

two

it

in

side

the

fully

the

link

it

1

2

Tighten

extension spindle crank.

5.

Rotate

rearward

gear

shaft

are parallel), then tighten the clamping bolt.

Operate the switches and visually check that the

actuators are

MAGNETIC CLUTCH -

See Page

SOLENOID VALVES

functioning

15

Model . . Danfoss EVJD-6 (Stamped '

The

solenoid valves

-

refrigerant

to

the expansion valves which serve the

two evaporator matrices.

HEATER

FLAP

ACTUATOR

EVAPORATOR

Fig. 7 Flap

the

the

end

crank

FLAP

aetuarors

clamping

gear

shaft

of

its
and

correctly.

COMPRESSOR

for description

valve body).

ACTUATOR

bolt

crank

stroke

the

connecting

and

control

to

lock the

to

the

(i.e.

when

procedure.

F'

the

flow

fully

the

link

on the

of

3. Place

4. Adjust

the

position

crank

so

on

the

is rotated clockwise

encountered

is

of

side

gear

shaft

crank

the gear shaft.

position

that

of

when

on

for a few degrees

the

fully

lever loosely

the

extension spindle

the

gear

shaft crank

the shaft, resistance

to

rearward

position.

in

each

The

lower end

of

the

movi,ng core has a rubber
insert which seats against a nozzle protruding
upwards
circuit
nozzle

from

the

body

of

is

open,

the

core

seat

by a spring-loaded

the

is held

plunger

valve.

When

against

which is

the
the

situated in the core so as to extend from the upper

and

face

contact

the

blind

end

of

the solen

oid

bore (see Fig. 8).

Page

11

Air

Conditioning

System

Manual

-------

Rolls-Royce

&

Bentley-------------

When
upwards
small

holes

mounts

·--~------

1 RETAINING

2 I

DENTIFICATION

3 SOLENOID

4 VALVE CHAMBER COVER

5 SECURING SCREWS

MOVING

6

7 DIAPHRAGM

B SEALING

9 VALVE

Fig.

8 So!P.nold

the coil is energised,

and

the

refrigerant

in

the

the

nozzle, leaving via the nozzle orifice.

SCREW

PLATE

AND

CASING

CORE

AND

NOZZLE

RING

BODY

valve -exploded

the

flows

rubber

diaphragm

view

core

through

is

drawn

which

two

orifice, the resultant pressure
causes

the

diaphragm

allowing the refrigerant to flow

inlet groove,

under

the

port, thus by-passing the two inlet holes

drop

in the chamber

to

lift

from

from

diaphragm,

its seating,
the annular

to

the

outlet

and

the

nozzle orifice and permitting full flow.

A leak

to

due
ring between

inefficient sealing;

the

chamber cover, refit

valve casing will

renew

valve

the

body

cover

and

probably

the

and

tighten

rubber

'O'

the valve

the

six

be

from

the

retaining screws.

A leaking valve may be caused either by a

faulty

diaphragm

or a damaged

core rubber

insert.

Icing

of

the

evaporator

or

leaking valve

or

faulty

THE REAR WINDOW DE-MISTER RELAY

In
battery,
and

wrongly set thermostat.

order

resulting

the

rear

incorrect

to

prevent

from

window
opposition, a relay is
to break the circuit for the rear window

may

be

operation

de-·

heavy

the

mister

loading

refrigeration

unit

incorporated

caused

by a

due to a

of

the

system

working in

in the system

de

-mister

whenever refrigerated air is being passed into the

.e. upper

car, i
3 anti-clockwise; lower
positions 1

The relay

of

The

upper

the

leads

side

THE EVAPORATOR CHANGE-OVER RELAY

the
left-hand valance
terminals
centre
leads
to
which

the

of

pass

cross
control

terminal a

airstream switch - positions 2 and

airstrcam

and

2 anti-clockwise.

is mounted

bulkhead

from

and

lower

loom

of

the change-over relay mounted at the

the

bulkhead. Fro

through

duct

and

the so

lead

feeds

on the uppeI' right-hand

.

the

number

airstream

and

nine

switches leave the

enter

m these terminals,

the

right-hand

transfer

lenoid

the

duct

valves.

compressor

terminals

the

WI

valance

thermostat

From

clutch

switch -

and

loom

the

of

C3

C2

via

the rear window de-mister relay.

0

"'

....

s

Since the total area

diaphragm

Page 12

is less

of

the two inlet holes in the

than

the

area

of

the nozzle

The

purpose

provide a feed

of

the change-over relay is to

to

the. compressor clutch from