1975 Citroen CX Cooling fan

Downloaded from www.Manualslib.com manuals search engine COOLING SYSTEM
L litre enlyne f
-I l’r’i ) except optional towing equipment (Thermostat closed and heater system open)
Hot cool.n+
>Id coolant I Electric fan
2 Radiator
3 De-aerating pipe
4 Header tank (expansion
chamber
5 Thermostat
2 6 Heater unit
7 Inlet manifold
8 Cvlinder head outlet tank
Partial view F
II Thermostot closed

Downloaded from www.Manualslib.com manuals search engine COOLING SYSTEM
/ 11’re e!!qlric
-1 1’1-5 j except oprlonal row,ng equ,pmenr
Thermostat and heater unit open
Hot coolant
Cold coolant I Electric fan
2 Rodiotor
3 De-aerating pipe
4 Header tank
5 Thermostot
6 Heater unit
2 7 Inlet manifold
8 Cylinder heod outlet tonL
-3
Portia1 view F
Thermostat open

Downloaded from www.Manualslib.com manuals search engine COOLING SYSTEM
2 4 litre engine, torque converter and air conditinninq (Thermostat and heater unit open)
Partial view F
8
1 Radiator
2 Electric fon (5)
3 De-aerating pipe
4 Header tank
5 De-aeration chamber
6 Thermostat
7 Heater unit
8 Drain top
9 Cylinder head outlet tank Cold coolant
,
I-
J1
- 0 Thermal switch for electric fan (s)
l-J 7
6
Thermostat open

Downloaded from www.Manualslib.com manuals search engine OPERATION NJ MA. 230.00 : 1 i !O,Oi ,V,iC,i< c “ii<, ‘/QC < iOi ,< “,,i!< 0, ii’< /
Op. MA. 230.00 7
COOLING SYSTEM
2 4 litre engine fuel injection (Thermostat and heater unit open)
Hat coolant
Cold coolant
Partial view F
1 Rodiotor
2 Electric fon (5)
3 De-aerating pipe
4 Header tank
5 De-aeration chamber
6 Thermostat
7 Heater unit
6 Drain top
9 Thermal switch for fan
0 Bleed screws
Thermast.t open

Downloaded from www.Manualslib.com manuals search engine DESCRIPTION OF COMPONENTS
1.
Battery
2. Starter
3. Anti-theft switch ignition and starting
4. Safety relay for starting and controlling the clutch electro-valve f ~/lr,c,r/(,r J
5. Clutch electro-valve ( co,/, V~IO~ J
6. Control relay for idling speeds f W//I r,~/or J
relay energized engine idling speed
- relay not energized 1 fast idling speed
7. Switch housing on gearbox ( WJ,, c,~/(,v J
8. Fast idle control relay / ~i)-c o~r/i/ir~//i,l~ 1
relay energized contact open fast idle
9. (( PIERBURG )) electro-valve for fast idle
- energized engine idle
not energized fast idle
10. I6 Amp. fuse 11.
General control relay 12.
16 Amp fuse 13.
Air blower ( tr’n~r// or c-old ) 14.
3-speed blower control
15. Regulating thermostat ( ~i,.=ror,c/i/irrr,i,l~: i
16. Air-conditioning switch 17.
Pressure switch on de-watering tank f ni,-=( or~rli/irrr/i~~~c ) 18.
Compressor clutch f nifsc o//di/io~i/l~ i 19.
Control relay for L.H supplementary electric fan (21 ) ( ~il..r~l/di/io//il/~ )
20. Control relay for electric fan (21 ) (
coolir~g o/ rficJiNlor (I nlc,r )
21. Supplementary electric fan for condenser ( ~il.~rol/ni/i~~ll/i//~ ) and water radiator ( cooling: J
22. Control relay for R.H electric fan ( 24) ( tooli~!: J
23. Thermal switch on water radiator ( (r)olir~,r~ to~trol )
24. R.H. electric fan for gearbox oil radiator and coolant radiator
25. Converter oil temperature warning lamp ( CM, c~sl~r J
26. Thermal switch for converter oil ( COMWKI~B ) KEY TO WI RING HARNESSES
No Mark
: Standard circuit (no optional equipment ) TB :
Instrument panel
Circuit for optional (( Converter - air-conditioning )) - No mark
; Converter wiring on body-shell
- CM : Converter wiring on engine

Downloaded from www.Manualslib.com manuals search engine WIRING DIAGRAM FOR ELECTRIC FAN AND AIR-CONDITIONING CONTROL
-- I’)‘(,
L64 4
41 1 1 Front harness
-
T
17
I KEY I
I I
I
Standard wiiinq I
I I
I I
I - Air-cond wiIinq, ‘- - - - - - - _-
1 i 1 1 1
/,/r/////,/,,,,/,//////~////~‘/‘~””’~”””””~””7”“““’
Earth on gearbox
Eart>, on front L H wheelarch 1.
Control relay for supplementary electric cooling fan
2. Control relay for air blower
3. Ambient temperature thermostat ( on evaporator )
4. Air-conditioning switch (on centre console )
5. High pressure switch ( on de-watering tank )
6. Electra-magnetic clutch for compressor
7. Control electro-valve for fast idle and re-cycling ram
( WEBER electro-valve )
8. Control relay for supplementary air-conditioning electric
9. Control relay for electric cooling fan 10.
Ignition coil 11.
Idle cut-off ( on carburettor ) .12.
Electric cooling fan
13. Thermal switch for electric cut-in ( on radiator )
14. Supplementary air-conditioning electric fan
15. Air blower for air- conditioning 16.
Control resistors for air-blower speeds 17.
Air blower switch ( 3-position )

Downloaded from www.Manualslib.com manuals search engine Op. MA. 510-00 b 17 WIRING DIAGRAMS’FOR COOLING FAN AND AIR-CONDITIONING SYSTEM CONTROL
SPECIAL FEATURES
From 1977 models the fast-idle electro-valve ( 9) is manufactured by 1, PIERBURG 1).
When it is not enerqized the electro-valve lets low pressure through towards the carburettor capsule (fast
idle ) contrary to the (1 WEBER )) electromvalve fitted previously.
Fitting the N PIERBURG )) electro-valve necessitates fitting a relay (8) which is enerqized when the air-
conditioning system is operating This relay, with its c( o/)t/i 1) contact cuts off supply to electro-valve (9)
which therefore produces fast idle. DESCRIPTION OF COMPONENTS :
1
- Heater relay ( .s/o~/~/Q~c/ )
2 - Air blower ( .S~n~~dnr(i i
3 - Speed control for blower ( S/nr/clnrt/ J
4 - Regulating thermostat
5 - Air-conditioning switch 6
- Pressure switch ( 01, dc,-rt,cr/t,rit,,q lnr~k ) 7
- Compressor clutch
8 - Control relay for fast idle melectro-valve
9 - Fast idle electro-valve lo-
Relay for L.H. supplementary electric fan f nip-cor/rli/ior/illS ) 1
I- Supplementary L.H. electric fan ( foolir2~~ ) 12-
Relay for L.H. supplementary electric fan ( cooli~/g ) ?3-
Control thermostat ( on radiator ) for electric fans ( Stnr~d& )
14- Relay for R.H. electric fan ( Stmzdnrrl )
15 Electric cooling fan ( Stal?dn~/ )

Downloaded from www.Manualslib.com manuals search engine II. OPERATING PRINCIPLE
The refrigerating system has four main components
- the compressor ( 4)
- the condenser ( 7)
- the pressure release valve (3 i
*
the evaporator ( 1 )
The refrigerating fluid used is the F. 12
L.64.1 a
Compressor
(4) - Manufacturer ASPERA FRIGO. type HG 700 ( or SANKYO type SD 508 on EMBAUT CLIMAT )
ASPERA twin-cylinder or
SANKYO five-cylinder rotary 1 Fitted onto the gearbox by means of a mounting bracket
The compressor circulates the refrigerating fluid draws in the fluid which is in a low-pressure vapour state
compresses it ( which increases its temperature ) and expels it into the condenser.
The condenser is driven by the engine via the water pump by two trapezoidal belts ( ASPERA ) or one trapezoidal
belt ( SANKYO ).
An electro-magnetic clutch is fitted to the compressor pulley. Its operation controlled by a switch on the centre
console is intermittent due to the presence of an ambient temperature thermostat ( 2 ) which is not adjustable, and
which senses the temperature near the evaporator cooling fins.
In case of excessive pressure in the return circuit, a pressure switch (6) opens the supply circuit to the compressor
clutch.
Condenser (7 ) - Manufacturer CHAUSSON
It allows the fluid to condense and to release its latent heat to the outside air circulating around the fins. It is
secured to the front L.H. side of the engine cooling radiator At the condenser outlet, the fluid is in the high-
pressure liquid state. The fluid flows through the tank ( 5) ( which contains a dehydrating filter ) and flows
towards the pressure release valve.
A 5-blade electric fan accelerates the circulation of air around the condenser fins.
De-watering tank .( 5) - Manufacturer : SINGER
It contains a dehydrating filter element, and is fitted with a visible level indicator, which allows the amdunt .and
state of the fluid to be checked, and a high-pressure switch (6).
The de-watering tank is fitted on the front panel by means of a mounting bracket at the rear L.H. side of the
engine cooling radiator.
Pressure-release valve (3) : It is incorporated in the heater unit, and regulates the output of fluid towards the
evaporator.
Evaporator ( 1) - Manufacturer SOFICA
The air flowing through the evaporator releases its calories, ‘which will cause the low pressure fluid to be
transformed into vapour.
It is incorporated in the heater unit upstream from the heater radiator.