Rolls-Royce Silver Cloud II, Bentley S2 User Manual

Page 1
~,
Air
Conditioning
Manual
System
Page 2
AIR CONDITIONING
Printed in Great Britain
by
William Hodge & Chilver Limi1ed, London
Page 3
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
Page 4
AIR CONDITIONING
REFRIGERATION
UNDERWING
UNIT
Page 5
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
Page 6
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
Page 7
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
Page 8
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
Page 9
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
-
Page 10
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
Page 11
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
Page 12
------------
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
Page 13
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.
Page 14
------------
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
Page 15
----------
- - 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
Page 16
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
Page 17
- -
----------
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
Page 18
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
Page 19
------------
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
Page 20
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
Page 21
-------------
••
Rolls-Royce & Bentley
Each
aluminium housing (see Fig.
The spherical bushes which are self-aligning smooth
-------
motor
motor
shaft
operation.
and fan
is
carried in self-lubricating
Air
System
is
mounted
9)
.
Conditioning
Manual
in a cast
to
ensure
Two speeds - medium and by the incorporation
of
high - are provided
a resistance in the circuit,
which is by-passed when the upper airstream con-
is
trol knob stream
clockwise
RESISTANCES - BLOWER MOTORS
pulled outwards,
switch
is
turned
or
the second position anti-clockwise.
Two resistances - one for each blower
are used
placed
Each
to
in
provide
circuit.
medium
resistance consists
oxidised wire forming a winding
of
a resistance in
a ~pool-type ceramic insulator bolted to a
2.8 ohms.
Bakelite mounting block which
IO
nd
).
for
side
the
of
bulkhead (see Fig.
The
resistance mounted head the
and
upper
on
the upper right-hand side
the recirculation blow
left-ha
or
the lower air-
to
the third position
motor
mot
or
speed
of
a 66-inch
of
The
resist a
is
fresh air
er
length
70
turns giving
nce
attach
ed to the
blower
of
the bulk-
resistance on
the bulkhead.
-
when
is held
of
is
either
Fig. 9 Blower
of
the
motor -exploded
vie>o"
independently operated airstream
switches.
The
C3
and
C2
contacts
when
allowing a feed to
an
anti-clockwise
upper switch to
and
winding
THE BLOWER MOTORS
'makes'
the
position. Operation
a 'cool' po~ition energises the
the
Model . .
Two identical
the fresh
air
beneath the wing,
motor
blower s
and
ituated
are
norm
ally closed,
lower
Cl
Smiths
switch
and
C_2 contacts.
FHM
5342/
is
turned
01
of
the
s are utilised in the system:
in
the
inl
et
ducting
the recirculation blower
mounted in the recirculation inlet duct beneath
flo
the front
or, to the rear
of
the lower evaporator.
Fig.
10
Reai•
tanc
e -
blow
er
motor
Poge
13
Page 22
- - -
---------
Rolfs-Royce
&
Bentley-------
Air
Conditioning
System
Manual
SECTION
THE
COMPRESSOR,
AND ANCILLARY UNITS
THE
COMPRESSOR
The compressor fitted to the Silver Cloud II and
is
Bentley S.2 cylinder unit, with clutch ( see Fig.
Replacement
is
not
recommended
work be The brush
Fault
on
valve
attempted,
valve plate, oil seal,
unit
diagnosis
When
carrying
the high pressure side indicates
or diagnosis, and
turn the compressor low pressure service valve clockwise compound Hg
almost
the Tecumseh
an
12). units
are
that
except
may be renewed
out
pressure tests, a low reading
defective gasket.
reduce
to
gauge
the
engine
the forward-seated position. The
should
immediately
satisfactory.
Switch leaking pressure. A rise
off
and
observe
shaft
seal will permit a rise to atmospheric
above indicates a defective gasket, valve
is
not
seating correctly.
Before disturbing any compressor
the service valves
to
seal release the pressure from the head for the oil level check.
When the cylinder head
the valves
and
cylinder bores. A will necessitate changing the valve plate assembly; where a
compressor
ment
cylinder
bore
is badly
must be fitted.
HH
vertical twin
Eaton
electromagnetic
readily available
any
major
by
the manufacturers.
clutch
bearing,
as
necessary.
To
speed
register
if
the
intake
the
gauge
overhaul
an
inoperative confirm to
'slow
12
in.
readings. A
atmospheric
or
that
the delivery
joint,
off
the
system
as
described
is
removed, examine
damaged
scored,
a replace-
and
and
the
the
idle'
to
18
in.
valve
pressure
close
and
valve
C.4
CONTROL
When fully refrigerant oil before
The
compressor -To
it
Remove the magnetic
Forward-seat
and release the
the
for securing the service valves Remol/e the gauze filter from the compressor inlet port, together with the fibre washer.
Unscrew the four compressor securing setscrews
situated bracket the service valves
is
When fitting the compressor, secure all
connections, then purge the turn
back-seated.
Test
static conditions. Install the gauge set, check the pressures, functioning correctly.
The
The
wheel driven and plate crankshaft (see Fig.
VALVES
re-assembling, clean all
and
immerse
the
fl tting.
remove
clutch
both
compressor service valves
compressor
new
joint
gaskets
and
fit
(see Page
pressure, as described
oil level check. Release the Allen screws
to
the
beneath
and
remove
both
service valves anti-clockwise until fully
for leaks
and
magnetic
clutch consists
by
a drive
to
plate
the
the
compressor
the
compressor
connected
to
air
under
ensure
clutch -compressor
operating
that
the
of
an
electromagnetic
unit, leaving
the pipes.
(see Page
conditions
complete
twin 'Vee' belts from the engine,
attached
forward
hy a flexible coupling
end
of
the
3}.
faces care-
in clean
16).
compressor.
mounting
18),
and
and
system
is
fly-
compressor
Page
15
Page 23
Air
Conditioning
System
Manual
-------
Rolls-Royce & Bentley
------------
The
flywheel is constantly driven by the engine
and when the circuit
bearing the electromagnet brushes mounted
two face
carried
circuit is closed,
copper
of
the flywheel.
on
the
is
conveyed through two carbon
on
collector rings
is
open, idles
drive
plate
current
the compressor body and
attached
The
electromagnet attracts
on
shaft.
to
energise the
to
the
a single
When
inner
the drive plate which is fitted with a fibre friction facing
To
the flywheel and drive· plate assembly from the crankshaft. Care should be exercised when removing the assembly
are
to
take
up
the
drive to
remot•e
Remove the single retaining
not
an.d
damaged
fit
.
to
ensure
the
compressor.
bolt
and withdraw
that
the brushes
Page
16
Fig.
ll
Compreuor
110,,
- e"ploded view
Page 24
-------------
Rolls-Royce &
Bentley-------
Air
Conditioning
System
Manual
Remove the retaining circlip
drive plate. Inspect the plate for wear
and
facing
renew the plate
for wear
Re-assemble
for cracked springs
if
necessary. Examine the bearing
and
clean . the collector rings.
the
clutch
and
and
withdraw the
or
loss
set
the
of of
between the two drive faces by means
in
three adjusting screws
the drive plate.
should be 0.025 in. to 0.035 in.
Examine
brush
Note:
Shaft
With compressor, press in extract the circlip to permit withdrawal
the
brushes
unit
if
necessary.
Failure presence rings
of
of
and
the
grease
removed with a
and
petrol,
seal -To
the
the
replace
clutch assembly removed from the
for
wear
clutch
brushes
may
or
oil
. This should be
cloth
unit assembled
the
sealing ring seat and
and
renew
be
due
on
tbe
moistened wilh
and
of
assembly.
the
Remove any roughness from
by
lightly stoning,
then
coat
shaft surface
all
parts
refrigerant oil before re-assembling.
the fibre
tension;
air gap
of
the
The
gap
the
to
the
collector
tested.
the seal
with
Lubricant
The
following proprietary lubricants are
approved:
Mobil Gargoyle Arctic
155
Wakefield Icematic Heavy
Shell Clavus 33
New
compressors are supplied containing new compressor some oil will
the
correct
remain
is
installed,
in
quantity
the
oil level must be checked and
dehydrated
of
oil.
it
is possible
and
When
that
system, therefore the
if
necessary
adjusted.
The
oil level
refrigerant
must
also
be
checked
is
extracted from the system.
when any
The correct oil level, when checked by a
It
dipstick, should be between
Oil
level -To
Run
the engine
check
at
fast idle with the refrigeration
in. and
system operating, until the compress
IO
warmed (approximately no liquid refrigerant remains
minutes) to ensure
in
1!
in.
or
is fully
Lhat
the compressor
crankcase. Forward-seat the low pressure service
run
valve,
the engine for a further minute and
a
Fig. 12
Magnetic
clutch
- compre&&or
8.100
Page
17
Page 25
Air
Conditioning
System
Manual
-------
Rolls-Royce & Bentley
switch off. Forward-seat the high pressure service
Do
not
valve immediately.
with the high pressure valve closed.
operate the compressor
Carefully slacken the gauge attachment capnut
on
each
service valve
to
release
the
gas pressure
from the head, then re-tighten. Thoroughly clean
and
dry the area around the oil filler plug and
slowly remove the plug so as to gradually release
the gas pressure from the crankcase .
When
releasing gas pressures, protective goggles
must
be worn to pre.,,ent any possibility
coming into contact with the eyes.
of
refrigerant
-------------
Measure
approximately
the oil
tin.
depth,
diameter.
using a
It
dry
, clean rod
may be found necessary to rotate the compressor slowly by hand to allow
'dipstick'
to
pass
the
crank
balance
the
weights.
Adjust the oil level by means
adding
or
drawing-off oil as necessary. Refit the
filler plug loosely; do not tighten the plug as
of
a syringe,
it
necessary to purge the air from the compressor.
Note:
It
is
recommended
that
oil be used only
from a sealed container.
To
purge
Slacken the protective cap service valve. valve very slightly and allow gas the compressor for gas then the valve
Back-seat
the
is
still passing,
air
from
Open
about
tighten
capnut
both
service valves
the
com·pressor
on
the high pressure
the low pressure service
to
pass through
ten seconds. Whilst the
the oil filler
plug
.
and
refit the
and
protective caps.
THE CONDENSER
The
condenser
radiator matrix
Its
purpose the compressor refrigerant
The
then
matrix
matrix: is situated
and
the intake grille (see Fig.
is
to cool refrigerant gas delivered by
and
condense it; the liquid
passes
into
the receiver.
comprises two banks,
between
each
the
13)
of sixteen horizontal tubes. A single inlet pipe con­veys compressed refrigerant the
head
of
the matrix. This
to a 'Tee'
junction
junction
at
supplies the
is
F'ig.
13
two
banks
Condenser
independently. At the base
01.a1rix
matrix another junction connects them to the single outlet.
A by-pass pipe to the flow control valve permits
high
pressure
the compressor when the valve
THE RECEIVER
The receiver construction forward
vapour
to
flow
is
a steel container
back
is
open
to
, secured by three bolts to a bracket
of
the frame front cross-
member
Fig. 14).
The
.
container;
inlet pipe union
the
is
outlet
situated
union
at
the top
is midway down the right-hand end-face . Inside the receiver, a pipe attached to the outlet union bends
the
base
of
downward to
that
ensure drier
.
A fusible
liquid refrigerant only will pass to the
plug
(see Fig. 14),
, inserted
prevents
the unit in order to
at
the base
explosion
in
the
of
the
the
side
of
.
of
welded
(see
of
the
positioned
of
the unit
event
of
Page
18
Page 26
-------------
Rolls-Royce &
Bentley
-------
Air
Conditioning
System
Manual
fire. Under no circumstances must this be replaced
by
a solid
THE
The
front
refrigerant
(see
The
with flared connections
Screwed
to
prevent protect granulated silica-gel.
DRIER
drier
apron
(F
ig. 14).
unit
into
plug
.
unit
is
and
receiver
consists
the
inlet
the ingress
the
dehydration
mounted
in
the liquid line between the
and
of
below the right-hand
the twin
a steel
at
port
of
coarse impurities
solenoid
tubular
the inlet
is a metal gauze filter
shell fitted
and
charge, which is
At
the outlet end, a felt
valves
outlet.
and
to
pad, retained by a perforated metal plate, prevents the ingress
s
hould
10,000
unit; after
reason
of
fine impurities.
The
drier
unit
and
the
be
renewed
mile
s,
i.e. after
20,000 miles , renew
The
charge must also be renewed
the
system
alternately
10,000
is
opened
dehydration
at
intervals
miles,
the
renew
charge only.
if
to
remove
charge
of
the
for any
a faulty
unit.
To
remove
each
end
To
renew the charge, remove the union situated
at
the
inlet
to ensure
Extract
quantity
THE EXPANSION VALVES
Two
controlling
entering
The
valve body is a brass stamping and basically chamber
the
unit,
of
the
end,
that
the
spent
of
silica-gel.
release
shell.
clean
the
the felt filter is
charge
gauze
and
the
pipe
filter
not
replace
union
and
at
check
obstructed.
by a fresh
expansion valves are used, each valve
the
atomisation
its respective
comprises
and
an
outlet
evaporator
an
bore
of
the matrix.
inlet
passage
; the inlet
refrigerant
, valve
and
outlet bores are fitted with flared connections. A renewable gauze filter is provided to
prevent
could
The
in a hermetically sealed
the
obstruct
valve is
ingress
the
valve orifice.
operated
of
coarse
by the pressure difference
chamber
in
the inlet bore
impurities
containing
which
a
1 Dfll ER
Fig.
14
3
FUSIBLE
Drier
·2 RECEIVER
PLUG
aPd receive
r
Pog~
/9
Page 27
Air
Conditioning
System
Manual
-------
Rolls-Royce & Bentley
-------------
bellows system. nected
pressure return the Expansion the a The adjusting protected
to
the valve
The
bellows exterior surface is
governed
pipe
from
valve
by
and
valve
by
spring-loaded
spring
tension spindle, by
the
Adjustment adjusts initial testing
the
degree
at
re-adjustment.
In
the
event
will
be
noted
the
spindle (2°C.) always wise
refrigerant
system.
the
THE
The along the
by-pa
the
condenser.
The minimum sure
side
high
pressure vapour
by
expanding
decrease
be
tightened
FLOW
flow
the
right-hand
ss
purpose
pressure
of
corresponds
CONTROL VALVE
control
line
the
introducing compressor. drop
in
the
compressor
ca
use
priming
The
interior
chamber
by
the
evaporator
a capillary
contraction
moving
piston
is
the
capnut
of
the
spring
of
superheat;
the factory
of
adjustment
that
one
to
the
after
may
escape
valve is
valance
between
of
this valve
of 2 lb
system.
from
it
through
it
to
the
This
prevents
of
the
oil.
of
the bellows is con-
by
a single drilled hole.
subjected
the
phial
clipped
and
connected
tube
(see Fig. 2).
of
the bellows
three
pins
, which
attached
varied
squared
at
the
to
by
end
base
tension
this is
and
should
being
complete
to
turn
approximately
superheat.. The
each
adjustment,
or
moisture
mounted
and
is
the
compressor
is
./s
q. in.
on
To
maintain
the
condenser
the
valve,
suction
too
heavy a pressure
operates
the
valve
means
of
which
of
the
6ffectively
set
require
necessary
clockwise
cap
may
connected
pipe
to
maintain
the
low
this
pressure,
is cooled
before
side
midwa)
of
crankcase, which could
to
to the
to
act
on
seat.
of
an
is
valve.
during
no
, it
of
3.6°F.
must
other-
enter
in
and
pres-
re-
the
The directly connected interior
beffows exterior chamber; opposition the
sealed
When
valve
the the valve will be
A
combined
device is
a.
valve
operation
conditions.
An
adjusting
to
valve opening and
should adjustment always
Fig. 15
outlet
Flow
port ( compressor
with
of a spring-loaded
is
subjected
thus
the
valve
to
the
spring
chamber.
the suction
chamber
line
pressure
opened
friction
incorporated
caused
screw
is
vary
the
spring
pressure.
require
be
be
tightened
This
no
further
necessary, the screwed
afterwards.
control
valve
suction
the
valve
chamber bellows to
pressure in a sealed
chamber
force
and
pressure
the
pressure,
, falls
to
by the spring.
and
bellows
to
prevent
by
rapidly
fitted
in
the
force
and
thus
is
set
during
adjustment. Should
line) is
and
the
system.
The
acts
pressure
and
therefore
2 lb./sq. in.,
damping
too-frequent
fluctuating
top
of
the
the
valve
initial testing
cap
must
in
in
Pa
ge20
Page 28
----------
Air
--
Rolls-Royce & Bentley
-------
Conditioning
System
Manual
No
regular
than
that
required
it
should Service system operational
The
periodic
SCHEDULES
Every
Check belts. A point generator
be
Department
should
following
maintenance
2,500
the
6 lb.
of
the
pulleys
i in.
Every
require
actuator
obstructions.
air
Note:
5,000
In
addition
attention.
Apply
Linkages.
Examine
Inspect
intakes
These generally
a few
the
for
maintenance
at
noted
that
for periodic
be
effect.
schedules
miles
tension
load
applied
rurl
between
should
miles
to
the
foregoing,
drops
the
condenser
filters
in
damage
filters
require
will
be
the
specified
whenever
checked
outline
operations.
of
the
compressor
to
each
the
cause
the
of
engine
matrix
the
fresh
or
blockage.
are
self-cleaning
no
attention.
SECTION
MAINTENANCE
necessary
intervals,
the
car maintenance, for
satisfactory
the
belt
compressor
the
belt
following points
oil to the flap
and
and
recirculated
other
enters
necessary
driving
at
the mid-
to
deflect
remove
and
but
the
and
all
will
C.5
Every
10,000
shorter
a
Discharge
approximately 5 lb./sq.
Remove expansion connections.
Remove
inlet port,
Renew
complete
Check Page
17).
rings for
that the
Renew
belts (see 2,500 miles schedule).
intake
Pages
leakage.
switch components
the
Adjust
Lubricate Examine
filters
Evacuate,
27
Operate
miles
or
period
the
system
and
clean
valve inlet bores, by releasing
the
gauze
clean
and
either
drier
and
Inspect
the
carbon
brush
the
to
the
positions
the
unit
adjust
presence
brushes
unit
tension
the
flap
the
condenser
and
remove
sweep
29).
system
function
(see
the
and
Check
and
annually,
until in.
the
two filters
filter from the
refit (see Page 15).
silica-gel
Page
the
compressor
magnetic
of
oil
if
necessary (see
of
the
actuator
any charge
throughout
ensure
correctly.
whichever
the
pressure
situated
charge
19).
clutch
or
grease,
are
not
badly
compressor
Linkages.
matrix
obstructions.
all
and
the
connections
the
that
oil
full
is
the
falls to
in the
the
flared
compressor
or
the
level (see
collector
and
check
worn.
Page
17).
driving
the
air
system
(see
range
all
for
the
of
PageZI
Page 29
~
~
"<
.,
...
"'
tt
0
3
'"'
::i
3
~
~
Q
:J
i:::
Q
-
a.
....
-.
0
~
-.
::i
ll'Q
'i!=i
9
J
g};
,...
~
5
6
l!!Q
,
MANIFOLD
LEAK
1
TUBE
4 TU
GAUGE
DETECiO~ LAMP
FLARING
BE
CUTTING
TOOL
TOOL
SET
~
Fig.
Sf"RING
16
S
SPANNER
b
SPANNER
7
RATCHET
B
THHMOMETH
MLANCE
Se,!'·l'ice
tools
,.ns
'"·
1
.oo
,n
. A/ f , _r; o
WP.ENCH
.
A/F ~ .e
.2SO
7S
in,
'"
A/F
in.
A/F
SQUl'.I\E
Page 30
------------
Rolls-Royce &
SECTION C.6
SERVICING
Bentley-------
Air
Conditioning
System
Manual
SPECIAL TOOLS REQUIRED
Part
No. Description
Number
off
RH.527 'Blaydon' leak detector lamp,
or
similar model
RH.528
Tube
flaring tool RH.529 Spring balance, 0-25 lb. RH.530 Thermometer
RH.531 Spanner, ring, l.125
X 0.875
A/F
RH.532 Spanner, ring,
X
LOO
A/F
0.75Q
A/F
A/F
I
RH.533 Wrench, ratchet, 0.250 square 1
Tube
RH.534
cutting tool I
RH.538 Manifold gauge set assembly l Also: A pair
goggles
and
a First-Aid kit con-
of
taining medicated liquid paraffin, and saline wash.
PRECAUTIONS HANDLING
Exposure
to
Large quantities
into a confined space
TO
BE
REFRIGERANT
refrigerant
of
refrigerant gas discharged
will displace
OBSERVED
the
WHEN
oxygen in
the air and could cause suffocation.
Liquid refrigerant which may accidentally
at
escape is
least 20°F. below zero
to come into contact with the skin
burn
by
the
rapid
transference
and
if
allowed
it
can
cause a
of
heat from the skin to the liquid as it evaporates. Serious damage to the eyes will result from contact with liquid
For
refrigerant.
this reason, goggles should always
be worn when contact might be possible.
Should liquid refrigerant come into contact with the eye, immediate first-aid treatment is necessary and
a doctor
as soon as
Fir&t-Aid
or
eye specialist should be consulted
is
possible.
treatment
Medicated liquid paraffin from the first-aid kit
an
should be applied to the eye from
eye dropper,
to wash away the Freon. The eye should not rubbed, as this will increase the the
eye remains painful after a few minutes, the
area
of
injury.
be
wash should be repeated, using a sterile salt solution containing not more than
2%
sodium
chloride.
THE
IMPORTANCE
The efficient operation
OF
CHEMICAL STABILITY
of
the system
dependent upon the pressure-saturation tempera-
of
ture relationship
pure Freon
system contains only pure Freon
of
amount
compressor lubricant which mixes with
the Freon), it is considered
12.
So long as
12
(plus a certain
to
be chemically
the
stable.
air
Wlten foreign materials such as dirt,
or
moisture are allowed to enter the system, they will affect chemical stability, change the pressure-
of
the
saturation temperature relationship and
possibly cause freezing-up
of
the expansion valve. Thus, the system will no longer operate the correct pressures
and
temperatures, with a
Freon,
at
consequent decrease in efficiency.
The
sealing
Whenever it becomes necessary
refrigerant connection, the exposed
of
components
to
ends
break a
should
be immediately capped. Air entering the system
on
will carry moisture, which collects quickly
any
exposed surface, causing deterioration, owing to
of
the acidic properties
FAULT
In
DIAGNOSIS
order
to
facilitate fault diagnosis,
may be considered as two
viz. the
air
delivery system circulation system; these independently. switches individually control the fresh air
an air-Freon compound.
separate
and
should
The
upper
and
lower airstream
air
delivery through
and
recirculated
the
unit
systems,
the refrigerant
be checked
air
ducting
respectively.
If
is
Pagel)
Page 31
Air
Conditioning
System
Air
delivery
Switch delivery out
over the full range
Failure indicates a blocked intake blower motor
Failure
when the knob
Manual
on
the blower motors
at
the duct outlets. This should
of
one system in all switch positions
or
flap actuator, or faulty wiring.
of
the fresh air blower
of
the upper airstream switch is in
-------
and
of
switch positions.
or
filter, a defective
motor
Rolls-Royce &
check the
be
carried
to operate
air
the pushed-in (medium speed) position only, indicates a defective resistance wiring fault. Failure motor (1st
to
operate
and
2nd clockwise
of
the recirculation blower
in the medium speed positions
and
or
switch
or
1st anti-clockwise)
of
the lower airstream switch will probahly be due to a similar defect.
A failure in
be
caused by defective switch contacts. Complete
failure indicates a fuse, switch
Refrigerant
Initial
procedure
Site the
position. Check the tension driving belts
one
switch position will probably
or
wiring defect.
circulation
car
in a well ventilated and shady
of
the compressor
and
the external cleanliness
of
the condenser, as detailed in the Maintenance
Schedule.
Start
the engine
and
allow it to
run
at
a fast idle, operating the refrigeration system with the blower motors
at
full speed. Visually check
that
the
magnetic clutch is operating.
Fault
location
An obstructed condenser matrix efficiently high
Blowers
Possible causes are as
and
will result in insufficient cooling and
compressor
and
compressor
head pressures.
opera.ting -No
follows:-
cannot
function
cooling
Bentley------------
5.
A faulty expansion valve.
6. Blower
motor
The following action should
1.
Check the system for leaks
re-charge.
2.
Test the operation solenoid valves faulty thermostat; service tive solenoid valve.
a
3.
Inspect
check
all hoses
that
operating.
4. Test compressor head pressures
(see Page
5.
Test the expansion valves for correct
15).
operation; necessary renew the unit.
6. Check
housing
that
have the reverse direction. This will cause a out
of
the intake. Reversing the motor leads
will
not
effect a cure.
Blowers
operating -Partial
Possible causes:
1.
Low refrigerant charge.
2.
A defective expansion valve.
3.
The
compressor operating above normal
pressure.
4. Restricted condenser tubes
line.
5.
A faulty thermostat
6.
The
condenser
7.
Incorrect refrigerant.
be
Action to
taken:
incorrectly installed.
be
taken:-
and
of
the thermostat and
and
adjust
or
and
pipes for
the
expansion
if
faulty, remove
the blower
not
matrix
motor
been
installed
cooling
or
solenoid valve. obstructed.
rectify, then
or
renew a
renew a defec-
kinks
and
valves are
and
valves
and
clean
or
and
impeller
facing
flow
or
discharge
if
in
1.
Low
refrigerant charge.
2.
An inoperative thermostat
3.
A restriction in the refrigerant circuit.
4.
Incorrect functioning
of
valves.
Page
2.4
or
solenoid valve.
the
compressor
1.
2.
Check Test
the system for leaks
the
expansion
valve, clean,
and
re-charge.
adjust
ren:ew.
3.
Test the compressor head pressures (see
Page
15)
and
if
necessary inspect the valves.
or
Page 32
------------
4.
Discharge the refrigerant, remove the
Rolfs-Royce
discharge line, and inspect it for signs restriction. Inspect the condenser
kinked pressed air lodge obstructions or,
or
obstructed tubes; apply dry com-
or
nitrogen to the tuhes to dis-
if
necessary, renew
the unit.
5.
Test the thermostats
and
solenoid valves
for correct operation, check the wiring con­nections.
6.
Inspect the condenser matrix for obstruc­tions and remove any foreign matter cleaning the matrix with warm water and applying compressed air from the side adjacent to the radiator.
7.
Test the pressure-saturation temperature
of
the refrigerant (see Page
and
low
head
Lo-w
relationship
suction
pressure
Possible causes:
l. Refrigerant charge low.
2.
Filter-drier unit obstructed.
3.
An obstruction in the liquid line.
4.
An incorrect expansion valve superheat setting.
5.
A damaged temperature control phial
not
phial
correctly
in
contact
adjacent pipe.
6.
An expansion valve filter with.
moisture or grit.
7.
Faulty compressor valves.
or
port plugged
pressure
with its
for
by
26).
or
&
Bentley-------
5.
Inspect the temperature control phials for
of
maximum contact with their adjacent pipes, and
examine the phials
for damage. Renew the complete valve
if
unit
6.
Remove and clean the expansion valves and
damage prevents correct operation.
filters.
7. Carry out the pressure test (see Page this reveals a faulty valve, renew the valve
plate assembly.
Low
suction
The
discharge pipe
pressure
probable
or
tion should be removed or,
component renewed.
High
suction
pressure
Probable causes are:
1.
The superheat setting
or
valve
admission
valves
of
compressor.
2.
An obstructed condenser matrix.
3.
The presence
a
system.
4.
Too great a quantity
Action to be taken:
I. Test the expansion valves
necessary, renew a faulty valve.
Air
Conditioning
System
and
Manual
c·apillary tubes
15),
and
high
head
preuure
cause
is
a blockage
in
the
condenser tubes. The obstruc-
if
necessary, the
and
high
head
pressure
of
the expansion
is
too low, causing the
liquid refrigerant to the
of
air
and/
or
of
refrigerant.
and
moisture
in
adjust or,
the
if
if
Action to be taken:
1.
Check the system for leaks
2.
Clean
the
filter
and
renew the dehydration
or
charge
3.
A partial blockage in the pipe will create a temperature fall this will be obvious
renew the· complete unit.
at
the point
to
the pipe from the unit
and
of
the touch. Remove
and obstruction, using dry compressed air or, necessary,
4.
Check the superheat reading (see Page
reset or,
fit
a new pipe.
if
necessary, renew the expansion
valve.
re-charge.
restriction;
remove the
if
26),
2.
Wash the external surfaces
of
matrix with warm water and free the matrix
of
obstructions by applying compressed air
to the face
of
the matrix adjacent to the
radiator.
3.
Discharge the system and re-charge it with
of
the correct quantity
4.
Evacuate and re-charge the system.
Suction
pressure
correct
refrigerant.
but
head
pressure
Probable causes are:
1.
The presence
2.
Too
great a charge
of
air in the system.
of
refrigerant.
the condenser
high
Page25
Page 33
Air
Conditioning
System
Manual
-
------
Rolls-Royce
&
Bentley------------
Action
to
be taken:
1.
Check the suction side
of
the system for
leaks and rectify. Discharge the refrigerant,
renew the dehydration charge in the drier, and
evacuate. Re-charge with the correct
quantity
2.
Discharge the refrigerant and re-charge with
of
new refrigerant.
the correct quantity.
Head
pressure
correct
but
suction
preuure
low
Probable causes are:
I. Blower motor or motors not functioning.
2.
Restricted filter-drier.
3.
The
Superheat setting
valve
or
valves too high.
of
the expansion
Action to be taken:
I. Check the blower motor operation.
2.
Test the filter-drier and renew it
if
the
filters
are choked.
3.
Check the superheat settings.
Pressure
Switch off
tests
and
install the manifold gauge set
with both its valves firmly closed. Remove the protection caps from the compressor service valves
and
just
crack
open
both valves
by
rotat-
ing one half-turn clockwise.
Warning:
During these tests it is essential that the compressor service valves are not
fully open, as this closes the system delivery and intake valves and could possibly cause
Run
the engine at fast idle wilh the refrigeration
system operating and the blower motors
an
explosion.
at
full
speed.
Turn
clockwise to damp
The
35
the compressor service valves anti-
out
any gauge fluctuation.
compound
gauge reading should be 20
to
lb.!sq.in. With the following ambient air
temperatures (temperature pressure gauge reading should
60°F. (15.6°C.) so°F. (24.7°C.)
100°F. (37.8°C.)
l l0°F. (43.3°C.)
Superheat
test
in
the shade) the
be:-
I00-150
lb.I
sq.in.
140-190 lb./sq.in.
180-240 lb.I sq.in.
230-280 lb./sq.in.
The system may be checked for correct
operation
by
testing the upper
and
lower
evaporators individually as follows: -
Attach the thermometer RH.530 to the suction pipe from the evaporator. Cover the thermo­meter bulb and the pipe with a thick cloth
to provide insulation from atmospheric temperature, leaving the scale visible. Allow the engine to run for a
few
minutes
at
1,200-1,800 r.p.m. with the refrigeration system operating. Read the thermo­meter, pressor.
and
the compound gauge
Add
3 lb./sq.in. to the gauge reading
at
the com-
to
compensate for pressure drop in the suction line.
Ref
er
to the following table to obtain the saturation temperature corresponding to this pressure and subtract this figure from the thermo­meter reading. The result should and
15
° F. which is termed the
be
between
'Superheat
Reading'.
Having obtained the correct values, any
can
inefficiency
only be attributed to poor air delivery. In such cases, check the blower motor operation and ensure that the inlet and outlet ducts are unobstructed.
TO DISCHARGE
The
refrigerant must be discharged
system
prior
compressor unit joints which are protected
THE
REFRIGERANT
to breaking any
joint,
from
the
except the
by
the
service valves.
Do
not discharge in the presence
the refrigerant does not burn, but decomposes
of
an open flame;
to
form a poisonous gas.
Remove the protective caps from the com­pressor service valves. Just 'crack' the high pressure valve in a clockwise direction, allowing
Page26
Page 34
------------
Rolls-Royce
&
Bentley-------
Air
Conditioning
System
Manuol
the refrigerant atmosphere.
Pressure-Saturation
Pressure
lb./eq.h>..
20 21 22
23
24
25
26 27
27
28 29
30
JI
32
33
34 37
35 38
in
the system to be discharged to
Care
must
be
taken
Temperature
Temperature
•F.
19.5
21
22
23.5
24.5
25.5
28.5
29.5 31
32.5
33.5
34.5
36
not
to
reiease
the refrigerant too quickly as this will result in oil
being drawn from the system.
should
require
at
least
fifteen minutes
The
operation to
ensure
complete discharge.
Always use releasing prevent damaging the flares
On
completion
evacuate
two
spanners
and
securing flared connections, to
of
repair work it is necessary to
and
sweep the system to remove all
in
opposition
or
tubes.
when
moisture before re-charging. The compressor oil level
should
be
checked, as described under
'Compressor'.
TO EVACUATE THE SYSTEM
The
use
of a vacuum advisable pressor may
Fit
the
manifold
but
be
if
this is
utilised as
as illustrated in Figure pressor
high pressure service valve
clockwise to the pressure valve turning
it
of
fully anti-clockwise.
pump not
for
evacuation
available
the
com-
follows:-
gauge set to
17.
Forward-seat the com-
end
of
the
by
its travel.
compressor
turning
Open
the manifold gauge set by
is
it
the
Relationship1Table -
Press11re
lb.leq.io.
36
37
38 39 40 41
42
43 44 45
46
47
48
49
50
Close the vacuum valve
set
by
turning
pressure service valve
Freon
Temperature
"F.
39
40 41 42
43.5
44.S
45.5
46.S
47.5
48.5
49.5
50.5
51.S
52.25 53
it clockwise.
by
rotating it
12.
of
the manifold gauge
Just
'crack'
one
the
half
low
tum
clockwise.
Start
the engine motors to gauge
and
'Fast'
when a vacuum
and
switch
on
the blower
speed. Observe the vacuum
of
28
inches Hg reached, allow the compressor to continue drawing a vacuum for a further 10 minutes, then switch off the
system
and
close
the
pressure
valve
on
the manifold gauge set. These two operations must carried
out
simultaneously, necessitating two
operators.
Switch off the ignition conditions to settle before taking a reading vacuum tained for
gauge.
5 hours.
This
and
allow
20
minutes for
reading
If
a drop in vacuum is evident
should
be
of
the
main-
after this period, a leak in the system is indicated
(see
under
TO
SWEEP
Back-seat
turning
leak detection).
THE SYSTEM
the
high
pressure
service valve
it fully anti-clockwise. Forward-seat the low pressure service valve by turning it clock­wise. gauge valves
Connect
set
on
the
centre
to a Freon
union
12
container.
of
the manifold
Close
the manifold gauge set by turning them
both
clockwise.
is
be
by
Page
ljl.
Page 35
Air
Conditioning
System
Manual
-------
Rolls-Royce
&
Bentley-------------
Fig.
l 7 Manifold
Open
the valve
the
air for a few seconds Attach record
set In fore start to
in
a spring balance
the
Open
the
and
allow I lb.
some
cases,
the
pressure)
the engine
draw
in
the
the
time refrigerant checked reading
frequently.
on
50 lb./sq.in. This
of
the
Freon
12
container, purge
and
then re-tighten.
to
the
container
weight.
vacuum
of
when
is low,
and
valve
gas
to
the
temperature
it
switch
of
the manifold gauge
pass
into
the system.
(and
may
be
necessary
on
the system in order
refrigerant. Owing to the variation
taken
remaining
the
to
charge, the
in
the
container
Do
not
allow the compound can
be controlled by regulating
gauge
weight
to
must
pressure
and
there-
to
of
be
exceed
the manifold gauge set vacuum valve.
Switch off
Close
the
back-seat
the
manifold
the
compressor
compressor
gauge
set
low pressure service
and
the ignition.
vacuum
valve
and
valve by turning it anti-clockwise . Close the valve of
the
centre
refrigerant
hose.
Start
container
the
engine
and
disconnect
and
operate
the the
gauge
set
in
poaition
system blower
for motors
Switch
approximately
at
full
speed
off
the
system
10
minutes
. and
switch
with
off
ignition.
If
the
system
it
testing,
is leak; this is possible pressure (see
and
Section maintains upon
completion
Ensure
set
are
that
closed.
valve two complete
Drain
the
pressure valve
TO
CHARGE
Before charging, it is necessary
fails
necessary
escape on
Leak
the
vacuum
the
Turn
system of
the
to
hold
the
vacuum
at
this
stage
to
because
of
refrigerant
Detection).
of
the
valves
the system is under
can
If
it
is
ready
sweeping
on
the
for charging
operation.
manifold
the high pressure service
turns
clockwise.
by slightly
opening
manifold gauge set.
to
draw
locate
be detected the
system
out refrigerant remaining from the s\Veeping operation. Repeat
the evacuation process (see Page 27).
the
the
when
~he
gauge
the
the
Page 28
Page 36
Rolls-Royce
&
Bentley -------
Air
Conditioning
System
Manual
Back-seat
forward-seat Connect set to the refrigerant container
of
valve manifold
the
high
pressure
the
low
pressure
the
centre
union
of
the container. Break centre
hose
and
purge
service valve and
service valve.
the
manifold
and
the
joint
gauge
open
of
the air for a
the
the
few
seconds, then re-tighten.
Attach a spring
balance
to
the refrigerant
container and record the weight. Open the vacuum
of 'the
motors. system, place the container in a bucket exceeding
heat. This could cause an explosion.
the 50 the
the
vacuum
disconnect the centre hose. Back-seat valves the covers leaks,
TO
operating using pressure to obtain the correct pressure, it
manifold
Start
the engine and switch
If
even
reading
lb./sq.in. This
vacuum
When
7 lb.
system,
valve
Close the valve
on
the compressor.
gauge
the
refrigerant
with
113
° F. Do not apply a
on
the
can
valve
of
of
refrigerant
switch
of
the manifold gauge set.
of
manifold gauge set
on
the service valves. Check the system for
adopting
CHECK
Leak
detection should
the
FOR
LEAKS
pressure
the
Detector
tests
for
appropriate
set.
on
does
not
the
compressor
of
warm
flame
compound
be
controlled by regulating
the
manifold
off
the
the
Freon
gauge
has
been
ignition
12
gauge set.
and
container
Disconnect
and
refit
the
following
and
Lamp
be
under
RH.527
procedure.
carried
static
figures).
may
both
blower
fl.ow
into the
in
operation,
water not
, or localised
Do
not allow
to
exc
drawn
close the
both
service
and
remove
protective
out
at
conditions,
(see under
In
order
be
necessary
eed
into
and
full
to re-charge the system.
Pass the
over all
colour
when the
Note::
end
points
of
the
open
It is
important
pressure
of
the
detector
where leaks
lamp
flame
end
passes over a leak point.
wilJ
not
pump
when
possible leaks, as refrigerant will
into
the
fuel
container
ing
the
flame
to
remain time. placed
Futhermore
in
an
, the
adequately
position, otherwise refrigerant may persist
the
in
vicinity
of
misleading results.
RIGHT-HAND
Should
order
to
remove
procedure
The
right-hand
shell
fl1USt
to the wing
Open
suitable
it
be neces
carry
the
should
FRONT
out
underwing
WING - TO REMOVE
sary
to
leak
detecti
be
adopted:-
front
door
first be removed in order
securing
the
right-hand
support
bolts
beneath
: -
front door
the weight. Remove the split pin the checkstrap.
If
electrically
will be
ne
securing the cor{duit to
unscrewing the six
The
door
prevented
perated
o be
window
moved
operated
cess
arv
may
then
by
the
, in which cas e the door
rearward
to
remove
hinge
be
leads
s to
windows
th bolts.
removed
,the extent
lamp
flexible hose
are
possible. The
change
to
operate
in
the vicinity
of
the Lamp, caus-
green
car
to
green
the
lamp
be
drawn
for
some
should
of
be
ventilated
the
car
and
give
remove
unit,
and
on tests
the
and
the
to
and
door
clevis
are
the
wing
or
following
radiator
gain access
pla
ce a
to
take its
pin
from
fitted, it
th e three screws
e hinge post before
unless
to
the electrically
this
should
of
the leads.
in to
is
Fig.
18
f..omprcssor
service
valve -backward-seated
·
'a:..
Fig,
19
Compree~or ~
ervice
Yah
·e -
forw1ud-seated
ua
Page
'l9
Page 37
Air
Conditioning
System
Manual
-------
Rolls-Royce &
Bentley------------
Unscrew the four bolts which secure the top
the
radiator centre stay, also the eight bolts securing the lower end
of
apron.
Remove the four bolts securing the front apron
the
to washers securing the wing.
the radiator shell.
follows:-
edge
one bolt which secure the lower edge.
vertical edge
ten bolts securing the wing to the valance. Dis-
connect the headlamp remove the wing panel.
side fairings, also the four nuts, bolts and
Remove the side fairing, the front apron, and
The
Remove the six bolts from the rear vertical
of
Remove six bolts from the lower edge
Support the weight
shell
to
the
matrix
the
shell to the under-tray
the
right-hand
wing panel can
the wing, also two self-tapping screws and
the
of
the wing.
of
the wing
and
and
the
and
the front
side fairing to
then
be removed as
stainless steel strip to
and
and
remove the
side lamp cables and
of
bonnet
front
To
prevent loss disconnecting the pipes from the drain
the
radiator
the heater pipes immediately they are dis­connected, by inserting and
clamping the hoses with worm drive clips.
Disconnect the two pipe unions
of
ends
forward end
rear
unit to the valance.
the snap connectors, then slide the underwing unit
off the motor housing, allowing the motor leads to pass through the hole in the ducting; remove unit from the car.
situated within the the valance.
the solenoid valves.
Slacken the worm drive clip situated at the
of
Disconnect the transfer duct thermostat
snap connector leads.
Unscrew the seven nuts securing the underwing
Disconnect the fresh air blower motor leads at
Remove the two
of
engine coolant when
heater
matrix,
or
alternatively, seal
i in. bolts into their bores
at
the forward
the recirculation ducting.
actuator
rubber
coupling tubes,
seals protruding from
matrix,
at
the
the
the
Should
window have prevented removal will be advisable to temporarily re-secure hinges.
UNDERWING UNIT - TO REMOVE
Should the detection similar fault necessitate the removal matrices follows.
Discharge the refrigerant from tlie system (see
Page 26).
Remove
Page 29).
Forward•seat service valve by rotating clockwise to the extent
pipe union at the junction adjacent to the actuators.
Page
of
3.0
cables for
and
underwing ducting, proceed
the
right-hand
the
travel. Disconnect the evaporator return
the
electrically operated
of
the
door, it
of
a leaking matrix
of
front wing (see
compressor low pressure
the
or
the
as
full
flap
UNDERWING UNIT -
Pass the blower motor leads through the hole
in the front ducting against the valance, so that the six mounting stqds protrude through the valance, the rear duct locates on
the
recirculation duct
over
the
housing Secure the unit and
nuts to the mounting studs bolt, washer Tighten duct the ducting
pipes; the hose from the water
connected to the lower pipe from the matrix. Secure the hoses with worm drive clips.
correct anti-freeze mixture.
the
and
seal with adhesive tape the joint between
Connect the coolant hoses to the heater matrix
Top-up
to
and
worm drive clip
and
blower housing.
or
refill
TO
FIT
and
place the unit in position
and
the intake
of
the fresh air blower motor.
the valance by fitting washers
and
nut
at
the top
on
the recirculation
tap
the
radiator
matrix with the
end
fits
refitting the
of
the unit.
should
be
Page 38
-------
-----
Rolls-Royce
& Bentley
---
--
--
Air
Conditioning
System
Manual
Attach the blower motor leads and the transfer
duct
thermostat
leads to
their
respective
connectors.
Connect the pipes between the expansion
valves and the solenoid valves.
Secure the evaporator return pipe union
valance Tee junction.
at
the
Evacuate and sweep the system, then check for
leaks (refer to the appropriate Sections).
of
Charge the system with 7 lb.
refrigerant (see
appropriate Section).
Fit the wing.
if
Check and,
necessary, reset the actuator
adjustment.
Page
31
Page 39
I
AIR CONDITIONING
REFRIGERATION
O.M.C. UNIT
Page 40
CONTENTS
DESCRIPTION OPERA ELECTRICAL COMPRESSOR,
MAINTENANCE
SER
TING
UNITS
VICING . . SECTION
THE SYSTEM
COMPONENTS
CONTROL
VALVES
AND
ANCILLARY
SECTION SECTION SECTION
SECTION SECTION
Cl C2 C3
C4
CS
C6
Page 41
Published
by
The Technical Publications Department
Rolls-Royce Limited
Pym's Lane,
Crewe
(T.S.D. Publication 744)
Printed in Great B~itain
by
William Hodge & Chilver Limited, London
Page 42
-----------
Description
Air
Conditioning
- -
Rolls-Royce
& Bentley
-------
System
Manual
INDEX
Page
..
Ct
Operating the System
Introduction
To
Operate
To
Operate
Electrical Components
Blower Motors Blower By-pass Solenoid Valve Rear Window De-mister Relay
Thermostat Control Switch
The Compressor, Control
Compressor
Condenser Drier Lubricants
Magnetic
Shaft
Maintenance
Safety Device Schedules Storage
(No. (No.
Motor
Resistances
Remove
Level-To
Purge
Clutch
Clutch
Seal-to
A.209
•.
the
Renew
HH
Fault Diaguosis
To
Oil To
Eaton Electro Lock Clutch
Tecumseh York
I Installation)
2 Installation)
Valves
and
and
Fit
Check
Air
cs cs
C5
C7 C7 C9 C9
cs
Ancillary Units
Cll
Cl5
CIS
CJ3
CJI
Cl2
Cl7 Cl7 Cl7
Servicing
Charging Chemical Diagnosis Discharging Refrigerant Evacuating
Fault Location
Air
Refrigerant Circulation
First Aid
Leak Detectiou Precautions Pressure Tests
of
Sealing Superheat Test Sweeping
..
Tools
Stability-Importance
..
Circulation
Treatment
..
Components
of
C24 C20
C2l
C23 C23 C20
C20
C24 C20 C21
C20 C22
C23
Cl9
Page 43
COMPRESSOR
,
CONDENSER
V)
'<
"'
...
lb
3
~
0
:::,
C:
Q
:ti,.
-.
~
n
0
:::,
0..
...
--
0
:::,
::,
(1q
THE~MOSTAT
D D
\
a.aw
HI~
HIGH
LOW
CONTI\OL SWITCH
PRESSURE
..
PRESSURE
PRESSURE
PRESSURE
VAPOUR
VAPOUR
LIQUID
LIQUID
'TEMPERATURE
I
EXPANSION
Fig. 1 Refrigerant Circlllation Diagram
VALVE
CONT~OL PHIAl
SIGHT
GLASS
1116
1
Page 44
--------
Cl
Air
Conditioning
-
----
Rolls-Royce &
Bentley-------
System
Manual
Section
DESCRIPTION
The
vapour
Royce and Bentley cars temperature and humidity surrounding air temperature and humidity are high.
To achieve greater efficiency, Jablite 'Sundym' (tinted) glass and an exhaust used to minimise heat penetration into the car interior.
Circulation
CHLORODIFLUOROMETHA NE),
by a compressor, driven through the medium
electromagnetic clutch and
The
purpose
raise the pressure
vapour and also the system. The high pressure, high temperature vapour
is denser which matrix. Ambient air passes across the condenser tubes by the forward motion fan
action.
This air, which
refrigerant vapour circulating through the condenser,
creates a heat transfer between these two media . Condensation
refrigerant (see Fig. 3).
compression system used on Rolls-
is
designed
in
of
the refrigerant, Freon I 2 (
Vee
belts (see Fig.
of
the compressor is two-fold; to
and
temperature
to
pump
the refrigerant through
to
reduce the
the saloon when
roof
insulation,
heat
shield are
DI-
is
maintained
of
an
2).
of
the refrigerant
delivered by the compressor to the con-
is
mounted
is
of
of
the vapour occurs, creating a liquid
in
front
of
the radiator
of
the
car
and engine
a lower temperature than the
Ct
At this point, as the liquid pressure decreased, the temperature will correspondingly de­crease. Heat laden air from the over the evaporator coil
fins
which the now cold refrigerant liquid by
twin blower motors, via the return air
car
interior
and tu
is
immediately
is
passed
bes
(through
is
circulating), c1ucts.
The high pressure and high temperature liquid now passes to the receiver, which just below the condenser, through the filter drier
is
a storage tank located
and sight glass to the expansion valve located in the evaporator assembly in the boot (see Fig. 4).
This automatic thermal expansion valve
is
the dividing point, separating the high pressure and low pressure sides
of
the system. It automatically meters
the high pressure, high temperature liquid refrigerant through a small orifice into the low pressure area
the
evaporator
the pull
coil. The low pressure
of
the low pressure (suction) side
is
created by
of
of
the
compressor.
HIGH
PRESSURE
1
LOW
PRESSURE
3 COMPRESSOR
IMPORTANT,
DETAILS ING
THE REMOVAL OF THIS PLUG
Fig. 2
Tecumseh
SERVICE VALVE SERVICE VALVE
OIL
FILLER PLUG
REFER
TO
FOR
INSTRUCTIONS REGARD-
Compn~or
COMPRESSOR
in
Position
Section
Cl
Page 45
C2
Air
Conditioning
System
Manua
I
-
----
-
Ro/ls-Royce
&
Bentley
----------
---
The temperature difference created by these two media causes a heat transfer from the warm air to the cold refrigerant liquid . As the liquid refrigerant absorbs the heat from the air, the refrigerant vaporises (or
boils) due
coil.
The cold, de-humidified air through two outlet ducts situated m the rear parcel shelf
of
Condensation
occurs with the reduction
This condensation is drained as water
evaporator a,-sembly
An expansion valve capillary tube strapped to the evaporator coil outlet of
the circulating refrigerant vapour. The pressure corresponding to this temperature diaphragm in the valve which opposes a balancing spring tension. The action forces closes the increase or reduction refrigerant vapour beyond the quantity necessary to complete the vaporisation process.
In this manner, the valve automatically meters the
correct amount
porator
to
the low temperature in the evaporator
is
then discharged
the car interior.
of
the air moisture simultaneously
of
the air temperature.
by
two drain pipes.
is
sensit[ve to the temperature
is
of
these two opposing
or
opens the valve port in relation to
of
heat absorbed by the
of
liquid refrigerant into the eva-
coil depending upon the degree
out
of
the
relayed to a
of
superheat
exrstmg at the evaporator outlet. clearly pointed factory setting
unless thorough experience with such adjustment has been gained.
The refrigerant vapour from the evaporator coil (bearing the heat from the car interior) into the suction side and begins
Prevention control the action
which controls a solenoid by-pass valve. The ther­mostat casing and has a manual setting with seven positions.
Normal thermostat setting sufficient cool air flow across the condenser the air delivery volume set manual setting accordingly. In adverse conditions stated necessary to set the control (bulb) from the thermostat
evaporator coil and
As tion thermostat setting will cause the points to close.
of
is
located on the left-hand side
or
in the cooler, more humid climates it may be
the thermostat points are 'normally open', reduc-
of
the coil temperature below the predetermined
out
that
no attempt to alter the
of
the expansion valve should
of
the compressor, compressed
another
the
of
cycle.
of
the evaporator coil from icing and
car
interior temperature
a thermostat in the evaporator assembly
is
position
at
a minimum, reduce the
at
'O'. A capillary tube
is
inserted adjacent to the
is
sensitive to the coil temperature.
It should
is
then pulled
is
obtained by
of
the evaporator
6.
be
For
or
be
made
in-
with
as
Section
Fig. 3 Evaporator Unit Installed in Boot
CJ
Page 46
-------------
Rolls-Royce
& Bentley
-------
Air
Conditioning
System
CJ
Manual
EVAPORATOR
2
EXPANSION
l
THERMOSTAT
~
BLOWER
Fig. 4 Evnpore.tor Unit with Cover Removed
MOTOR
This creates an electrical circuit to a normally
closed solenoid valve coil, causing the valve to open.
The valve, located under the bonnet and adjacent to
the
right-hand valance,
and
to a
•r
compressor.
connection on the suction side
As
is
connected to the condenser,
the
valve opens, high pressure
of
the
vapour from the condenser is mixed with the low pressure vapour from the evaporator. The resultant
MATRIX
VALVE
CONTROL
SWITCH
pressure raises the evaporator pressure and corres­pondingly increases the evaporator temperature. The thermostat variation
is
governed for an approximate 5°F.
at
any setting.
If
the evaporator temperature varies more than 5°F., the thermostat points will open, simultaneously closing the solenoid by-pass valve.
Sution
Cl
Page 47
-----
--
---
-
--
Rolls-Royce & Bentley------
Section C2
OPERATING THE SYSTEM
Air
-
System
cs
Conditioning
Manual
INTRODUCTION
Two slightly different control switches are fitted to
operate the Rolls-Royce Silver Cloud
S2
car
Air Conditioning (Refrigeration) O.M.C. unit;
in
these are described tion (No.
control
of
the steering column (see Fig. with a centre buttons on either side, marked LO, Those to the left left-hand blower speed
control the right-hand blower speed.
The second installation (No. 2) that switch panel is an additional toggle type switch.
TO OPERATE (No . 1 INSTALLATION)
A. Turn the switch marked
l)
of
sw
itch panel located immediately to the left
'OFF-ON'
on
the extreme right
detail below. The first descrip-
operation covers the push-button
cancelling button with three
of
the
'OFF-ON'
and
likewise those to the right
of
the push-button control
'LOWER'
11
and Bentley
5)
which
is
provided
MED
and
button control the
is
similar except
(located on
HI.
the facia panel) to the (The compressor
refrigerant through the system).
B.
To Operate both Blower Motors
Select the required blower speed and push
respective buttons on the push-button control panel.
C. To Operate
'IN'
Push all buttons). Push speed desired.
TO OPERATE (No.
A. Push 'CLUTCH' push-button control panel).
B. Blower motor selection
Band C of No. I
the centre
'UP'
(located on the extreme right
FIRST
is
now operative and circulates the
One
Blower Motor
'OFF-ON'
'IN'
2 INSTALLATION)
or
'DOWN' the toggle switch marked
INSTALLATION
position anti-clockwise.
button
the
button
of
the blower
and
speed desired see
OPERATION.
'IN'
(this cancels
of
the
and
the
Fig. 5 Blower
Motor
( :ontrol Panel
Section C2
Page 48
~
"
Q
BLOWER
MOTORS
7-
BUTTON SWITCH PANEL /
"<
""
"'
...
II)
3
~
Q
:i
C:
Q
):a,
....
.,
('\
0
:i
~
...
0
:i
::i
OQ
6<
RE
AUXILIARY
TO ~EARWI
FUSE
Ol•HISTU
.
"=
REAP.
WINDO.;,,
DE-MISTER
LOOM
I LACk
8U l ~
/WHITE
~
RELAY
Fig. 6 Wiring Diagralll
1--.:;SL.._~"'-"-K----+--OO
'LOWER'-~
AIR CONDITIONING
SWITCH
ff
/
B 111
Page 49
-------------
Ro//s-Royc.e & Bentley-------
Section C3
ELECTRICAL COMPONENTS
Air
Conditioning
System
C7
Manual
THE BLOWER MOTOR RESISTANCES
Two resistance units are incorporated in the circuits
for the two blower
The
resistances
hand
side
of
The
resistance unit
with the right -hand blower
The resistance consists domed fibre cover. medium speed
motors
are
the bulkhead and secured by screws.
motor
.
mounted together
mounted
The
operation.
to the right
motor.
of
a wire coil inside a
coil has a centre tapping for
on
the right-
is
in circuit
THE
BLOWER MOTORS
The twin blower motors are situated at each end
of
the
evaporator iden tic a I uni ts and are no
attention.
Each
motor minium fan which draws air, from the central duct on
the parcel shelf, through the
and
discharges through its individual
quarter.
The
two motors are operated independently push-button column. Three speeds are made available by the introduction
of
casing in the boot. They are
sel
f-1
u br ica ting, th
has a centrifugal drum-shaped alu-
evaporator
control panel adjacent to the steering
resistances with centre tappings.
us
duct
req
ui
ring
matrix,
in the rear
by
the
Fig. 7 Blower Motor Resistances
Section CJ
Page 50
...
Air
Conditioning
System
Manual
-----
--
Ro/ls-Royce &
Bentley--------------
Fig:.
II
THE
Tl1ER:\-I0STAT
A seven-positiot1 switch mounted
of
the
side tempc1-~lt
evaporator
ure
of
the solenoid
CO:'IITROL
SWITCH
01
1 the left-hand
casing controls the
by-pass
val
vc.
A capillary tuhe 1·rom the lo(, ot' the thermostat
enters
the
scn.,itive to
of
ment
the
the solenoid
This
prevents
matrix.
w"hich
evapornlor
the
tcmpernlun: swi va
Ive
too
could
matrix, rnaki
tch position
w i
11
open .rnd cyclc the
low a
temperature
cause icing
11g
the thermostat
ul'thc
euolcd <11r. Adjust-
vanes
the
poi11L
i11
the
of
the
fi11s
al which
co;11
pressor.
evaporator
and rc:duced
airnow.
I
42 -40 F
I
40
-3~
2 3
_,g
F
-36
Thermo~tat
cut-111
36
-34 F
( on trol Sn itl'h
A
11
in
lernul adj u,;trncnt ~etti ng o be
,ct
the
swi
to
the required range !givrn below)
rep lacc:mcn l switch
should should
lhc
be
nccl:ssan-. \VARN
11evcr
be
~ystern
is
operating
lch tem pern tu re range. This
placed
is
filled; no
in
as
screv,,·
I~(;.
the
this could
!he solenoid valve and the compressor·.
The
ponding
approximate
to the ,;even operating
minim
um
follows:-
32
(,
-30 F
JO
4
s
34 -32 F
is
prnvided
Curt
her
adjustment
The s\vitch knob
'OFF"
-28 F
position \vhen
muse
temperatures
pos1
tions an:
7
t·or
i nitw 1
rn
ust
whc:n
danrnge lo
corres-
as
a
Seuit111
C3
)
Page 51
-
-----------
- - Ro/is-Royce &
THE BY-PASS SOLENOID VALVE
Bentley-------
Air
Conditioning
System
C\I
Manual
Model-Danfoss
FXMW
right-hand
on
The
solenoid valve
the valve body).
valance and line between the condcmer. thermostatic evaporator
The
of
cooling, preventing icing
Operation
switch controlled by a phial
matrix.
purpose
maintain a minimum low pressure side pressure, high p ressure passed suction side too which
through
of
heavy a pressure
could
cause priming
The
construction
The
lower end
EVJD-6 (Stamped
is
mounted
is
connected
compressor
of
this valve
pressure
of
the system.
the valve
of
vapour
intake
the valve
is
to
of
the
of
from the
and
reintroduced
evaporator, 2 lb/sq. in. on the
the compressor. This also prevents
drop
in the
compressor
of
the oil.
of
the
valve
is
shown
of
the
moving core
insert which seats against a nozzle
wards
from the body
is
open, the
core spring-loaded plunger which as to end
extend
of
from
the solenoid bore (see Fig. 9).
seat
the
of
the
valve. When
is
held against the nozzle by a
is
situated
upper
face and
FXM
midway along
in
the by-pass
pipe
and
is
governed by a
in
control
the
degree
and
To
maintain this
condenser
to
crankcase
in
Figure
has a rubber
protruding
the
circuit
in
the core so
contact
the
or
the
the
the
to
the
9.
up-
blinc1
) -
--
-
4 ·
is
6
--.
,
8
9
e
104
When
the wards holes in
coil is energised
and
the refrigerant flows
the
rubhcr
diaphragm
the
through
which
nozzle, leaving via the nozzle orifice.
Since
the
total area
diaphragm
the
resultant pressure
diaphragm
is
less
to
lift
refrigerant to flow from the
under
the di
aphragm,
passing the two inlet holes
permitt
ing full flow.
A leak
from
the valve casing will
to inefficient sealing; renew
the
cover
valve
and
between refit the
A leaking valve may
diaphragm
or a damaged
of
than
the
drop
from
to the outlet
body
and the valve
tighten
be
the
two inlet holes in
area
of
in the
cham
its seating, allowing
annular
and
the nozzle orifice
the
the
six retaining screws.
caused either by a faulty
core
rubber
core
is
drawn
up-
two small
mounts
the
the
the nozzle orifice,
bcr
causes
the the
inlet groove,
port,
thus by-
and
probably
be
due
rubber 'O' ring
chamber
cover,
insert.
RETAINING IDENTIFICATION
2
(FITTED TYPE
3
SOLENOIO
~
VALVE
TO
ONLY)
AND
CHAMBER
Fig. 9
SCREW
PLATE
EAisL Y
CASING
COVER 9
By-p11ss
5
SECURING MOVING
7
DIAPHRAGM
B SEALING
VALVE
Solenoid Valve
CORE
isl
BODY
SCREWS
AND
NG
NOZZLE
THE REAR WINDOW DE-MISTER RELAY
In
order
to prevent heavy loading
the
resulting from
refrigeration system and the window de-mister unit working in is
incorporated
rear
the is
bci ng passed
The relay is
of
the
bulkhead.
in
the system to
window de-mister whenever refrigerated air
in
to the car.
mounted
on the
of
opposition,
break
uppcr
right-hand
the
the
circuit for
battery,
Section
rear
a relay
side
CJ
Page 52
C/0
Air
Conditioning
System
Manual
--
---
- - Rolls-Royce &
Bentley---
------
-
---
Section C4
Fig.
10
Tecumseh
Compressor-Exploded
B IOI
View
Page 53
--
---
------
--
Rolls-Royce
Section C4
& Bentley
------
Air
-
System
Cl/
Conditioning
Manual
THE
THE
COMPRESSOR
The compressor used in conjunction with the
O.M.C. unit cylinder unit, with an Eaton Electromagnetic clutch (see Fig.
COMPRESSOR,
is
either the Tecumseh
2),
or
the York A.209 with
CONTROL
HH
vertical twin
an
Electro Lock
r nc. clutch.
Replacement units are readily available
recommended attempted, except plate, oil seal
necessary.
FAULT DIAGNOSIS
When carrying
the high pressure side indicates an inoperative valve or
defective gasket. the engine speed to 'slow idle' and turn th~ com­pressor low pressure service valve clockwise to the forward-seated position. The compound gauge <;hould diately if the intake valve
leaking shaft seal will permit a rise to atmospheric pressure. A rise above atmospheric pressure indicates a defective gasket, seating correctly.
service valves to seal off the pressure from the head as described for the oil level
check.
valves and cylinder bores. A damaged valve will necessitate changing the valve plate assembly; where
a cylinder bore
pressor must be fitted.
and
before fitting.
COMPRESSOR
To
release the compressor pressure, as described for the
regbter
Switch off and observe the gauge readings. A
Before disturbing any compressor joint, close the
When the cylinder head
When re-assembling, clean all
immerse the new gaskets
Remove
Remove the magnetic clutch. Forward-seat both compressor service valves and
that
any major overhaul work
by
the manufacturers. The valve
and
clutch bearing may
out
pressure tests, a low reading on
To
confirm the diagnosis, reduce
12
in. to
or
is
badly scored, a replacement com-
UNIT-TO
18
in. Hg. almost imme-
is
satisfactory.
that the delivery valve
!>ystcm,
is
removed, txamim: lht:
joint
in
clean refrigerant oil
REMOVE AND FIT
and
it
is
not
be
renewed
is
not
and
release the
faces carefully
be
as
VALVES AND ANCILLARY UNITS
oil level check. Release the screws securing the
service valves to the compressor. Remove the gauze filter from the compressor inlet port (also the :fibre washer
situated beneath the compressor mounting bracket and remove the compressor unit, leaving the service valves connected to the pipes.
To Fit
then purge the
clockwise until fully back-seated.
conditions. Install the gauge set, check the pressures
and
correctly.
MAGNETIC CLUTCH-COMPRESSOR
The Eaton Clutch, as Fitted to the Tecumseh HH
driven by twin 'Vee' belts from the engine, and a drive plate attached by a flexible coupling plate to the forward end
when the circuit carried closed, current to energise the electromagnet
veyed through two carbon brushes mounted compressor body att::iched to the inner face electromagnet attracts the drive plate which with a fibre friction facing to take up the drive to the compressor.
Eaton
flywheel Care should
to ensure
drive plate. Inspect the plate for wear facing and for cracked springs
renew the plate if necessary. Examine the bearing
for wear and clean the collector rings.
on
Tecumseh units).
Unscrew the four compressor securing setscrews
When fitting the compressor, secure all connections,
air
and
turn
both
service valves anti-
Test for leaks under operating conditions
ensure
The clutch consists
The flywheel
Remove the single retaining bolt
Remove the retaining circlip and withdraw the
that
the complete system
of
an electromagnetic flywheel
of
the compressor crankshaft.
is
constantly driven
is
open, idles on a single bearing
on
the drive plate shaft. When the circuit
and
two copper collector rings
Clutch-To
and
that
Remove
drive plate assembly from the crankshaft. be
exercised when removing the assembly
the brushes arc not damaged.
by
of
the flywheel.
and
or
and
is
functioning
the engine and
withdraw the
of
loss
of
static
is
con-
on
the
The
is
fitted
the fibre
tension;
is
Section C4
Page 54
Air
Conditioning
System
Manual
-------
l'ig.
11
Rolls-Royce
Eaton
Magnetic
&
Bentley
--------------
B.100
Clutch
Re-assemble the clutch and set the air gap between the two drive faces screws in the drive plate. The gap should be 0·025 in. to 0·035 in.
Examine the brushes for wear
unit
if
necessary. Failure to the presence and
brushes. This should be removed with a cloth
moistened with petrol and the unit assembled
tested.
The
Electro Lock Magnetic Clutch
York
A.209
This clutch differs from the solenoid does secured to stationary. the necessity for feed brushes reduces servicing to the provision the bearings on which the clutch rotates.
Electro Lock
Remove the the compre5sor into enough withdraw the clutch
Extract withdraw the shaft and driving plate. Inspect the
the
The
Clutch-To
the bore
of
to free the clutch from the crankshaft, then
the spring ring from the clutch shaft
by
of
means
grease
of
the three adjusting
and
of
the clutch may
or
oil on
renew the brush
the
collector rings
as
Eaton
clutch
not
rotate with the Aywheel but
compressor
stationary
crankcase
solenoid design eliminates
and
and
collector rings and
of
lubrication for
Remove
central
retaining
crankshaft;
the clutch. Screw in the bolt
and
bolt
and washer from
insert
at
in.
remove the bolt.
Fitted
in
thus
UNC.
be
due
and
to
the
that
the
is
remains
bolt
just
far
and
drive springs in the
annular
Check lubricated and wear.
Shaft Seal-Tecumseh
With pressor, press in the sealing ring seat
circlip to permit withdrawal
Remove lightly stoning, then before re-assembling.
Shaft
Seal-York
and
nylon spigots, also the fibre facing
groove
that
the bearings in the pulley are adcq uately
the clutch assembly removed
any roughness from the
in
rotate
freely without roughness
HH-To
coat
A.209-To
the driving plate.
Renew
of
the seal assembly.
all parts with refrigerant oil
Renew
REMOVAL
Remove the flywheel key from the
Remove the seal plate capscrews gently pry the seal plate loose, taking or
scratch the flat sealing surfaces
shaft
surface.
hand
should
the
carbon
Do
not
sharp
ring
pry
object
compressor
When
be held
if
or
in
such a
or
clutch
shaft.
removing the seal plate, the
under
the seal housing to
it
is
free.
force the
carbon
manner
and
as to
from
the com-
and
extract the
shaft
surface by
the
woodruff
and
washers
care
not
or
the polished
ring with a
damage
to
catch
hard
or
and
mar
the
Section C4
Page 55
-----------
- -
Rolls-Royce & Bentley-------
Air
Conditioning
System
C/3
Manual
carbon ring.
In
some cases it may be bonded to the
retainer.
Remove the seal assembly from the shaft
that
behind the drive ring which is
portion
by
of
the seal
prying
assembly farthest back on the shaft. When prying the seal assembly from the shaft, do not scratch the
crankshaft
or
the sealing housing face on the
crankcase.
All parts should
INSTALLATION
Check the front face
journal
in
the seal housing, to make certain
be
cleaned prior to re-assembly.
of
the crankshaft front bearing
that
the two seal drive pins are in place. These two drive pins are located l
B0°
apart
on the front bearing journal
face.
Wash all portions
of
the seal assembly in clean
refrigerant oil.
Push the seal assembly, less the carbon ring,
free, over the end
of
the shaft, with the carbon ring
if
it
is
retainer facing out. Move the assembly along the
shaft a
few
times to ensure a good seal between the
neoprene ring and the shaft. Push the seal assembly
all the
way
on the shaft making sure the slots in the
seal drive ring engage the drive pins on the shaft
bearing journal face.
If
the carbon ring is separate, place it in the ring
retainer
The carbon ring must engage the driving lugs and be
so
that
the polished surface is facing out.
fully seated in the ring retainer.
Place a very light film
of
clean refrigerant oil on the matching metal foccs where the seal plate gasket is
to be placed. Place the seal plate gasket, dry, in
position on the seal housing face.
Fig. 12 York Compressor
in
Position
Place the seal face plate in position with the polished portion facing the carbon ring and insert the cap­screws with the washers. evenly while rotating the shaft, making sure there even clearance between the shaft the face plate.
If
clearance is not the same all
Turn
in the capscrews
and
is
shaft hole in
around the shaft, gently tap the seal face plate into position until there is equal clearance. After equal cleo.ro.nce
is obtained, tighten all the capscrews
by tightening diagonally opposite capscrews evenly to the required
90
lb. in. torque.
LUBRICANTS
The following proprietary lubricants are approved for compressors:-
MOBIL
TECUMSEH
YORK A.209
HH
GARGOYLE
ARCTIC
155
REGENT
use
in the Tecumseh
CASTROL SHELL
ICEMATIC
TEXACO CAPELLA E
HEAVY
HH
and
CLAVUS
York
33
A.209
Section
C4
Page 56
Cl+
Air
Conditioning
System
Manual
-
------
Rolls-Royce & Bentley
--
--------
----
Fig.
13
Filler
Plug-York
New compres!'.ors containing compressor will remain
be checked
The
refrigerant is extracted from the system.
The
when checked by a dipstick,
It
in.
1-±
in.
the correct
is
in!>taHed,
in
the system, therefore the oil level
and
oil level must also be checked when
correct oil dep th
The
correct oil
are
quantity
it
if
necessary adjusted.
in
depth
Compressor
supplied dehydrated
of
oil. When a new
is possible
the Tecumseh compressor,
is
between
in the
York
that
some oil
Ii
in. and
A.209
and
must
any
is
Measure the oil
approximately
necessary to
allow the 'dipstick' to pass the
Adjust the oil level by means
or
drawing-off oil as necessary. Refit the filler plug loosely; purge the
NOTE:
from a sealed container.
To Purge the Air from the Compressor
Slacken the protective cap on the high pressure service valve. very slightly
compressor for
still passing, tighten the oil filler valve cap nut.
Back-seat both service valves and refit the protective
caps.
rotate
do
not
air
from the compressor.
It
depth
i in. diameter.
the compressor slowly by hand to
tighten the plug as
is
recommended
Open
and
allow gas to pass
about
usrng a dry, clean rod
It
may
crank
balance weights.
of
a syringe,
it
is
that
oil be used only
the low pressure service valve
through
ten seconds. Whilst the gas
plug
and
be
adding
necessary to
then the
found
the
is
Oil
Level-to
Run system operating, until the (approximately refrigerant remains Forward-seat engine for a further minute seat the high pressure service valve immediately.
Do
not operate the compressor with the high pressure
Check
the engine at fast idle with the refrigeration
compressor
10
minutes)
in
the low pressure service valve, run the
to
the compressor crankcase.
and
is
ensure
switch off.
that
fully warmed
no liquid
Forward-
valve closed.
Carefully slacken
each
service valve to release
head,
then
re-tighten.
area
around
plug
so as to gradually release the gas pressure from
the crankcase.
When rdeasing gas pressures, protecrive goggles
must
be
coming into contat:t
Section C4
the oil filler
11·orn
the
gauge
attachment
the
gas pressure
Thoroughly
plug
and
to
pre\'ent any possibility
11·ith
the eyes.
cap
nut
from
clean
and
dry the
slowly remove the
of
refrigerant
on
the
Fig. 14 Condenser Matrix
Page 57
---------
----
Rolls-Royce
CONDENSER
The
condenser matrix
radiator
matrix
Its purpose is
compressor
and the
to
cool refrigerant gas delivered by the
and
condense
is
situated between the
intake
grille (see Fig. 14).
it;
the liquid refrigerant
then passes into the receiver.
The
matrix comprises two banks, each
horizontal
tubes. A single inlet pipe conveys com­pressed refrigerant the matrix. This independently.
junction
connects
to
junction
At
the
them
a 'Tee'
junction
supplies the
base
of
to
the single outlet.
the matrix
of
at
the head
two
sixteen
of
banks
another
A by-pass pipe to the solenoid valve permits high
pressure the compressor when the valve
vapour
to
flow back
to
the suction side
is
open.
of
THE RECEIVER
The
receiver
is
a steel container
of
welded con­struction, secured by three bolts to a bracket forward of
the frame
The container; down a
pipe
to
the base
refrigerant only wil l pass
A fusible plug, inserted
prevents explosion in
circumstances must
front
cross-member (see Fig. 15).
inlet pipe union is situated
the
the
right-hand
outlet
union
end-face. Inside the receiver,
at
the
is
positioned midway
attached to the outlet union bends
of
the unit
in
order
to ensure
to
the drier.
at
the base
the
event
of
fire. Under no
thi.<;
he replaced by a solid plug.
top
of
downward that
liquid
of
the
the
unit,
& Bentley
Air
Conditioning
--
---
- -
System
Fig. 16 Compressor and Refrigerant Lines
C/5
Manual
8180
Fig.
THE
DRIER
The
drier
apron
(see Fig. 15),
the
elbow
at
The
drier unit consists
with
flared connections
I
SIGHT
2 RECEIVER
3
15
Drier, Receiver and Sight Glass
unit is
mounted
and
the
outlet
GLASS
DRIER
below the right-hand
has a sight glass
end.
of
a steel
at
the inlet
tubular
front
attached
shell fitted
and
outlet.
to
Screwed prevent the ingress protect the dehydration charge, which Silica-gel.
into
the inlet
At
the outlet end, a felt pad, retained
port
is
a metal gauze filter
of
coarse impurities
is
granulated
perforated metal plate, prevents the ingress impurities.
The
drier unit
be
renewed alternately
i.e.,
after
10,000 miles, renew the unit;
and
the
dehydration
at
intervals
charge should
of
10,000 miles,
after
miles, renew the charge only.
The
charge must also be renewed
the system is opened
To
remove the unit, release the
end
of
the shell.
To
renew the charge, remove the union
to
remove a faulty unit.
the inlet end, clean the gauze filter ensure the
that
the felt filter
spent
charge and replace
is
not
if
pipe
obstructed.
by
a fresh
for
union
and
quantity
any
situated
Silica-gel.
to
and
to
by
of
fine
20,000
reason
at
each
at
check
to
Extract
of
Section C4
a
Page 58
--
----
-------
Ro/ls-Royce & Bentley------
Air
Conditioning
System
C/7
Manual
Section
MAINTENANCE
The complete system should be checked every six
months for correct operation and topped-up with
of
of
the
refrigerant as necessary, particularly after periods non-use
winter months.
l.
of
the Air Conditioning System during
EVERY 5,000
Check the tension
A 6 lb. load applied
drive-side run deflection
of
of
of
either belt should cause a
i in.
Mil.ES
the compressor driving belts.
at
the mid-point
C5
2. Using compressed air, thoroughly clean the of
condenser matrix fins
STORAGE
The operation
before
use
after storage as loss
due to leakage past seals.
SAFETY DEVICE
A fusible plug is inserted explosion in the event must this be replaced
of
all foreign matter.
the system should be checked
of
refrigerant
in
the receiver to prevent
of
fire. Under no circumstances
by a solid plug.
can
ensue
Section C5
Page 59
--
- -
--------
- - Ro/ls-Royce & Bentley
-------
Air
Conditioning
System
C!Y
Manual
Section
SERVICING
The following special tools are available and can be ordered through Rolls-Royce and Bentley distributors, if required.
Part
No.
RH.531
RH.532 Wrench, Ring, ·750 in.
Wrench, Ring. 1·125
·B75
1
RH.533 Wrench, Ratchet, ·250
RH.5J8 Manifold Gauge Set, Assembly
Description Off.
m.
A/F x
in.
A/F
A/F
·000
in. A/F
in.
square
x
.. ..
C6
RH.530 RH.529 RH.527 'Blaydon' Leak Detector Lamp,
RH .
RH.534
RH.669
Thermometer
Spring Balance, 0-25 lbs.
Similar Model
Tube Flaring Tool
528
Tube Cutting Tool
Filter
..
Goggles, Pair
Kit.
First Aid, containing medicated
liquid paraffin and
.. ..
sa
Ii
ne
wash.
or
9
MANIFOLD
2
LEAK
DETECTOR LAMP
J TUBE FLARI
.f
TUBE
CUTTING
ri
,I
8 8
GAUGE
NG
TOOL
TOOL
~
.~
SET
~
6
e
--
9 SPRING
Fig. 17 Service Tools
BALANCE
~
5
SPANNER
6
SPANNER
7
RATCHET
B THERMOMETER
4
~
I ·125 ,n. A/F x ·875 in. I ·000
1n.
A/F
x ·750 in.
WRENCH
·250 in. SQUARE
A/F A/F
Sec/ion C6
Page 60
CJO
Air
Conditioning
System
Manual
---
--
-
Rolls-Royce
& Bentley
--
-
--------
--
PRECAUTIONS HANDLING
Exposure to Refrigerant
Large quantities a confined space will displace the oxygen and
could
cause suffocation.
Liquid refrigerant which may accidentally escape
at
least 20"F. below zero contact rapid as result from reason, goggles should always be might be possible.
the eye, immediate Firs, A id is necessary
or
possible.
:First
should wash as this will increase the remains painful be repeated. using a sterile salt solution not
The Importance
upon ship only pressor lubricant which mixes with the i:reon). it considered to be chemically stable.
are
chemical stability. Temperature cause freezing up system will and efficiency.
The Sealing
Whenever gerant immediately capped. Air entering the system will
carry
with the skin, it
transference
it evaporates. Serious
Should
Medicated liquid paraffin from the First Aid
The
When foreign materials such as dirt.
liquid refrigerant
eye specialist should be consulted
Aid
Treatment
be applied
away
the Freon.
more
than
efficient
the Pressure-Saturation
of
pure
pure
Freon
allowed to
no
temperatures, with a consequent decrease
connection, the exposed
moisture, which collects quickly
TO
BE
OBSERVED
REFRIGERANT
of
refrigerant gas discharged into
and,
can
of
heat from the skin
damage
contact
Freon
Relationship
of
it
with liquid refrigerant.
to
the eye from
The
eye should not be rubbed,
area
after
a few minutes. the wash should
2 %
sodium
of
Chemical Stability
operation
12.
12
enter
of
longer
Components
becomes necessary to
chloride.
of
So long as the system
(plus a certain
the system. they will affect
change
of
the expansion valve. Thus. the
operate
WHEN
in
the
air
if
allowed
cause a burn by the
come
of
the system
Temperature
the Pressure-Saturation
the Freon.
at
the correct pressures
to
worn
into
an
eye
injury.
amount
air
hreak
ends
on
to
come into
to
the liquid
the eyes will
For
this
when
contact
contact and a doctor
as
dropper,
is
or
and
should
any
with
soon
Kit
If
the eye
containing
dependent
Relation-
contains
of
conc-
moisture
possibly
a refri-
be
exposed
is
as
to
is
in
surface, causing
properties
FAULT LOCATION
For
the purpose
falls into two groups.
of
an
deterioration,
air-Freon
of
compound.
complaint
owing to the acidic
diagnosis, the system
I . Air Circulation
2. Refrigerant Circulation
AIR CIRCULATION
Switch
Check
A failure on a defective blower tion between the motor.
A failure to a defective switch.
A complete failure indicates a fuse, switch
defect.
REFRIGERANT CIRCULATION Initial Checks
Site rhe Check the condenser,
Start the Air on. Visually check operating.
Observe the sight glass located filter receiver porator
sight glass, the refrigerant
continuous
valve
through the valve
low. In either case check the system for leaks. (See
Section
lee formation
an expansion valve. this can be caused by a faulty expansion valve.
A partial blockage will
at
the line, this will be obvious to the
on
and check
over
the full range
one
side only would be
on
push-button
in
one
switch position only would be
car
in
a well ventilated
the belt tension
as
detailed
the engine
Conditioning
drier
or
assembly). If bubbles
in
the
on
indication
point
or
across the receiver
and
(this
is
either
in some instances
or
intermittent hiss from the expansion
boot
indicates
and
Leak Detection).
adjacent
of
excessive delivery
of
restriction in a
air
delivery
of
that
side
and
the external cleanliness
under
warm-up
system with the blowers full
that
is
that
that
to the
create a drop
or
touch.
at
the
duct
outlets.
blower speeds.
due
to
either
or
a defective connec-
switch
the magnetic clutch
located
or
low. Also, a distinct
vapour
the refrigerant charge
filter-drier assembly, ~nd
and
the blower
or
wiring
and
shaded
'MAINTENANCE'.
at
a fast idle. operating
adjacent
adjacent
adjacent
foam
is
compressor
in
hot
vapour
to the to the
to the eva-
appear
hcing passed
through
in
intake
temperature
or
liquid
area.
due
of
the
the
is
is
is
Secrio11
C6
Page 61
-
--
----------
PRESSURE
Before taking readings, the a well-ventilated position of
air fan in front over
the condenser
over
a long period.
cap,
after topping-up
The
'blow-off' pressure is 7 lb/sq. in. relief valve is located top
of
the filler cap.
Switch
the
compressor valve service valves firmly closed. Remove from the compressor service valves open
both
clockwise direction.
During
pressor service valves are
closes the system delivery and
pressor
Run
ditioning
TESTS
to
over
the
condenser.
of
the
radiator
if
the
system is
Check
the
the
coolant
under
the
radiator
OFF
valves by rotating
these tests, it is essential
and
lines could occur.
the
engine
system operating
header tank,
and
insta!l
the
not
at
a fast idle with the Air
car
should
ensure
It
is advisable
for
additional
security
level
the detachable plate on
or
manifold gauge set
ports
the
one
fully opened, as this
damage
as
previously mentioned.
Ro/ls-Royce
be sighted
an
adequate flow
to
to
be operated
of
the
as
necessary.
and
the
is incorporated in
with
protection caps
and
just
half
turn m a
that
the
to
the com-
place a
air
flow
radiator
pressure
on
both
its
crack
com-
Con-
in
&
Bentley
Turn
WISE as necessary
lb/sq. in.
(temperature recorded gauge reading should be
above temperatures would only apply flow is allowed
DIAGNOSIS
the
with a high reading a defective compressor head gasket gasket Plate and Gaskets) .
--
- - -
the
compressor
The
compound
With
the
following ambient
60°F (15·6°C) 100---150 lb/sq. rn. 80°F (26·7°C) 140---190 lb/sq. m.
l00°F
(37·8°C) 180---240 lb/sq.
110°F (43·3cq
N.8.-The
Set the
fully antt-clockwi.se position.
A low reading
or
maximum reading for each
compressor
:1
defective valve. (See
--
service valves
to
damp
gauge reading should be 15-30
in
the shade),
as
follows:
to
pass
over
valves t a
on
the high pressure gauge
on
the
compound
Air
Conditioning
System
ANTI-CLOCK-
out
gauge fluctuation.
air
temperatures
the
2(5-270
if
very little
the condenser.
turn
clockwise from
gauge, indicates
or
Section-Valve
C2J
Manual
pressure
Ill,
lb/sq. in.
of
the
air
coupled
valve plate
Fig. 18 Manifold Gauge
Set
in position
Section C6
Page 62
C22
Air
Conditioning
System
Manual
---
---
- Ro/ls-Royce & Bentley
--------------
Fig. 19 Serviee
An
unusually low reading
indicates:
A low refrigerant charge.
A very light heat load condition.
Valve-Back1~ard
of
the
compound
A partial re-striction in the expansion valve.
A low expansion valve A defective expansion valve.
evaporator
An
A high reading
An
excessive refrigerant charge.
An unusually high
car
windows lowered
operative.
Poor
contact
element with the A defective expansion valve. An open solenoid by-pass valve.
An unusually low reading
gauge indicates:
An open solenoid by-pass valve.
An
unusually high reading
gauge indicates:
An
excessive refrigerant charge. A restriction An
unusually high Insufficient air passing over the condenser. An unusually hot-running engine.
or
non-condensable gases in the system.
Air
coil blocked hy ice.
of
of
in
the high pressure side.
power
element charge.
the
compound
heat
the expansion valve power
evaporator
heat
load condition.
gauge indicates:
load condition such as
or
coil outlet.
of
the high pressure
of
the high pressure
seated
gauge
heating system
gauge, coupled with a low reading
gauge indicates a restriction in the expansion valve port
such as internal icing condition
expansion valve screen.
of
the
compound
or
a blocked
SUPERH[AT TEST
The
system may be checked for correct
as follows:
Attach
from the valve bulb. with cloth to provide insulation from atmospheric temperature, leaving the scale visible. Operate the engine at a fast idle with the Air
operating (full
minutes. Read the thermometer, and the gauge at the compressor. gauge reading the suction line.
Refer to the following table temperature corresponding to this pressure subtract this figure from the
The
the 'Superheat Reading'.
a glass
evaporator
result should lie between 8-15°F. This
thermometer
so
that
it
is
Cover
the
thermometer
on)
and leave running for a few
Add
to
compensate for pressure
to
thermometer
to the suction pipe
near the expansion
Conditioning
3 lb/sq. in. to the
obtain
bulb
compound
the
saturation
operation
and
pipe
system
drop
in
and
reading.
is
termed
Pressure-Saturation Temperature
Pressure lb/sq.
Temperature
in.
20 21
22
73
24 25
26
27 28
29
30 32·5 31
32 34·5 33 34
relationship
OF
19·5
21 22
21-''i
24·5 25·5 27 28·5 42 29·5 43 31
33·5
36 37
table-Freon
Pressure Temperature
lb/sq.
12
in.
35 36 37 38 39 42 40 43·5
41
44 45 48·5 46 47 48 49 50 53
OF
38 39 40 41
44·5 45·5 46·5 47·5
49·5 50·5 51
·5
52·25
An instantaneous high reading
gauge
and
subsequent unusually low reading
Secrion
C6
of
the high pressure
of
this
Where correct
readings
are
compound
obtained, any
and high pressure gauge
complaint
of
inefficiency
Page 63
----
can
only be
for
operation
are
unobstructed.
reading
tions
causing a lack
-
--
attributed
and
would be
------
to
Jack
ensure
observed
that
A slightly low
if there were
of
air delivery.
of
air delivery.
inlet
and
compound
- Rolls-Royce & Bentley
Check
outlet
ducts
gauge
any
obstruc-
-------
Air
Conditioning
System
C23
Manual
DISCHARGING
When
it is necessary protected be discharged.
Do is exposed. decomposes
Remove service valves. in
a clockwise direction, allowing
the must
as
system. minutes.
Always use
disconnecting to
flares
After before sweep compressor under
EVACUATING
The evacuation may
Fit illustrated. Forward-seat valve direction valve anti-clockwise direction fully.
Close
by
rotating low clockwise
Start
blowers
by service valves,
not
discharge in
system
be
taken
thi8 will result in oil being
The
or
the necessary
re-charging, it is necessary
the
system,
'Compressor'.
use
be utilised as follows:
the
manifold
of
the
to
of
the manifold gauge set by
the
pressure service valve by giving
direction.
the
engine
in
REFRIGERANT
to
break
an
area
The refrigerant does
and
forms a
the protective
Just
to
be
not
to
operation
two
Aured
tubes.
oil
level should be checked,
of
a vacuum
but
when
compressor
the
end
vacuum
it in a clock wise direction.
and
the
'Hl'
poisonous
caps
'crack'
discharged
release
should
wrenches
connections,
The
tubes
repair
to
remove
pump
not
gauge
unit
the
hy
of
its travel.
valve
of
run
on
position. Observe the
any
joint
which is
the
refrigerant
where
gas.
from
the high pressure valve
the
to
atmosphere.
the
refrigerant
drawn
take
in
oppos1t1on
to
are
easily twisted.
has been
to
all
the
is
recommended
available the
to
the
high pressure service
rotating
Open
rotating
the
manifold
'slow idle'. Switch
must
an
open
not
burn,
the
compressor
refrigerant in
too
quickly,
out
at
least fifteen
prevent
moisture.
compressor
it
Just
half a turn
damage
made
evacuate
as
detailed
compressor
in
a clockwise
the pressure
it in
gauge
'crack'
vacuum
of
on
not
first
flame
but
Care
the
when
and and
The
for
as
an
set
the
in
the
Fig.
20
Service
Valve-Forward
gauge
and
when
a reading
or
when
the
maximum obtained reached; a
vacuum
pressure valve
diately switch off the ignition. be
pump
Switch off quickly, a leak is prevalent. vacuum extremely slowly a leak is possible. condition, minutes Freon a pressure rise in the system. reading ascertain system
SWEEPING
It renewed for procedure presence
Back-seat the high pressure service valve by anti-clockwise the clockwise direction. the Close
a
in a clockwise direction.
Open the
from the prevalent
allow
the
for a
further
on
evacuated
is utilised.
in the
for
is
n:l:ommi::11<l1c:<l
any
low pressure service valve by
manifold
both
manifold
for a full
the
engine.
it is advisable
to
eliminate the possibility
compressor
obtained
that
leaks, see
if
the
considerable length
of
valves
the
should be held for
no leaks are present.
system has been
outlined
moisture
to
the end
gauge set
on
valve
of
centre hose
of
possible
compressor
15
the
manifold
15
minutes when a
If
to
oil
under
Leak
lhal
Lht:
of
in this
in
the system.
of
Connect
to a Freon
the
manifold
the
Freon
joint,
28
barometric
minutes,
the system loses vacuum
its travel.
seated
inches
vacuum
to
continue
gauge
The
system
Tf
the
further
vaporising
J"illt:r
time
evacuate
of
The
Detection).
tlrit:r asst:mbly
open
or
manual
turning
the
centre
gauge set by
12
container.
purge
B~5
Hg. is
reached,
that
can
conditions
drawing
then
close the
set.
Imme-
must
also
vacuum
system loses
In this
for
residual liquid
and
creating
final vacuum
30
minutes
(To
check
the
to
atmosphere
if
the diagnosis
indicates
turning
Forward-seat
in
union
12
container.
turning
Break
the
air
for
be
is
45
to
bt:
the
the
of
a
Section C6
Page 64
04
Air
Conditioning
System
few seconds balance to the
Open
and
allow approximately into the evacuated system. In some cases of
gas will not flow into the system, so allow the amount the system pressure with the Freon pressure. Allow the system to remain for a period allow the pressure reading to exceed regulating the manifold gauge set vacuum valve. Switch
Purge the
additional
Remove the manifold gauge set from the compres-
sor
service valves, set the service valves to their midway position to allow the Freon remaining in the system of
the high pressure gauge to the discharge service
port
of
connected
gauge valve closed open,
discharge service port,
through
out
through valve. Allow this mately
CHARGING
It
is refrigerant before charging fully. Repeat the evacuation process
and
switch off.
Back-seat the high pressure service valve forward-seat the low pressure service valve. Re­connect with
the refrigerant container,
the
container. Break the manifold
and
purge
Hook a spring
Manual
and
then re-tighten.
container
the vacuum valve
to pass into the system which will balance
50
lb/sq. in. This can be
off
the system
Freon
Freon
charge as follows:
to
escape to atmosphere.
the compressor. With the manifold
to the
allow
Freon
the condenser, filter drier,
the service
five
seconds.
necessary to
put
in
the centre union
the
air
and
record the weight.
of
the manifold
one
dry
Freon introduced into the
of
on
and
switch
in the system by
Freon
and
from the container to pass into the
operation
for a few seconds,
balance
container,
the high pressure gauge valve
through
port
of
to
draw
out
during
the sweeping
of
the manifold
and
to
the refrigerant
Hook a spring
pound
of
IO
minutes.
the
compound
off
the ignition.
introducing
Connect
the
the service
evaporator
the suction (service)
continue
the remainder
open
centre
then
------
Rofls-Royce
gauge
gas to pass
one
pound
12
container
Do
gauge
controlled
the hose
gauge
compound
for
approxi-
of
operation
gauge
the valve
hose
joint
re-tighten.
container
set
not
by
an
set
port,
and
the
and
set on
&
Bentley
and
record the weight.
manifold gauge set.
Start
refrigerant will
compressor
bucket apply explosion.
pound controlled by regulating the manifold gauge vacuum valve.
When system, switch vacuum valve.
Close the valve disconnect the centre hose. Back-seat valves the manifold gauge set on
service valves.
a detector lamp.
LEAK DETECTION
Leak detection ing pressure (see figures)
Detector Lamp. In
pressure, it
Light the detector lamp the flexible hose possible. green when the open
It
is pump refrigerant will be
and
the flame will thus remain green for some time,
and
be unusable
Furthermore, the where there is gerant
misleading results; however,
prevalent a possible leak (An
alcohol
above).
----
the engine
not
in
operation
of
warm
water
a flame,
on
while
may
or
Do
not
gauge
to
31-4 lbs. refrigerant has been
off
the compressor. Disconnect
and
under
may
be necessary to re-charge the system.
The
colour
important
in
the vicinity
as
adequate
persist in the vicinity
or
the seepage
leak
-----
Open
the vacuum valve
and
switch
on
flow into the system even with the
stand
not
exceeding 113°F.
localised heat.
allow the reading
exceed 50 lb/sq. in. This
and
close the manifold gauge
of
the
Freon
and
replace protective covers
Check
should
under
static
round
not
drawn
could
detector
the system for leaks, using
be carried
pressure tests for
conditions
order
of
end
to
a leak detector.
car
to
and
all points where leaks
the
lamp
passes
operate
of
into
should
ventilation, otherwise refri-
draughts
of
gas in a
dissipate
may
-
--
of
the blowers.
the
container
Do
This
could
cause
on
the
can
drawn
12
out
by means
obtain
move the open end
flame will change
over
a leak point.
the
possible leaks because
the body
be placed in a position
of
the
particular
without
be used similarly
into
container
both
service
and
remove
at
full
operat-
appropriate
the
correct
lamp
pressure
of
the lamp
car
and
should
area
detection.
of
not
-
the
If
the
in a
not
com-
set
the
set
and
the
are
give
an
be
of
to
be of
as
Sec1inn
C6
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