Page 1: ...Air Conditioning System Manual...
Page 2: ...AIR CONDITIONING REFRIGERATION Printed in Great Britain by William Hodge Chilver Limi1ed London...
Page 3: ...with the necessary service procedure All special tools required to carry out service opera tions are listed and illustrated Although all information provided within the Manual was correct when going t...
Page 4: ...AIR CONDITIONING REFRIGERATION UNDERWING UNIT...
Page 5: ...y a specialised refrigeration engineer Special equipment and precautions are necessary when un lenaking scrvidng and overhaul operations and it should be always remembered that the refrigerant circula...
Page 6: ...AI enquiries should be addressed to ROLLS ROYCE LIMITED Pym s Lane Crewe Cheshire Telephone Crewe 55155 Telegrams ROYCRU CREWE T S D Publication 123 Printed in England...
Page 7: ...NTENTS DESCRIPTION SECTION C l OPERATING THE SYSTEM SECTION C 2 ELECTRICAL COMPONENTS SECTION C 3 COMPRESSOR CONTROL VALVES AND ANCILLARY UNITS SECTION C 4 MAINTENANCE SECTION C 5 SERVICING SECTION C...
Page 8: ...II Fault diagnosis 23 Thermostatic switches 9 Air delivery 24 Upper airstream switch 7 Fault location 24 The compreMor control valves and ancillary unil 8 Pressure tests 26 Compressor IS Refrigerant c...
Page 9: ...ENT RECIRCULATED WMM OR COOL AIR TO FRONT COMPARTMENT RECIRCULATING AIR INTAKE FILTER BLOWER HOTOR EXPANSION VALVE SOLENOIDE VALVE Fig l The air condiliomn8 sy ten CONDENSEP FLOW CONTP OL VALVE I HEAT...
Page 10: ...these PHIAL EVAPORATO R MATRIX TEMPERATURE CONTROL PHIAL 4 EVAPORATOR MATRIX L P VAPOUlll D H P VAPOUR H P LIQUID VALVE SOLENOID VALVE VALVE SOLENOID VALVE may be operated independently or together i...
Page 11: ...air thus enters the car at a reduced temperature also at reduced humidity since a proportion of the water vapour in the air will condense during the cooling process and drain away through drain holes...
Page 12: ...justable duct under the front picnic tray and the duct on the left hand side of the scuttle To prevent the temperature of the air passing through the evaporator falling below freezing point and the sy...
Page 13: ...WE 7 rr _J 1 11 I DE tt1STl R L CROSS DUCT o w j J I rll SOLENO aoiii i _ I I VAL YES L _ _ _ R _ E _ Ac R____ LO_O M ______ J OWER l Fig Wii ing diagram Air conditioning M Y81nn RECIRCULATING All RES...
Page 14: ...ressor operating and the blower motor running at medium speed The result is a mixture of ambient and refrigerated air passing from the top half of the heater matrix and the upper evaporator unit In th...
Page 15: ...travel of the contact Jobes A numbered disc is attached to the rear of the switch for terminal identification the key to which is as follows Terminal Number 1 Water Tap Leak 2 Evaporator Flap Closed 3...
Page 16: ...speed full speed is only obtained in position three clockwise and position two anti clockwise Lobes on four sets of moving contacts complete circuits with combinations of the nine sets of fixed contac...
Page 17: ...g the switch should be attempted only with the aid of a power source and indicator light Random operation of the setting screw without positive indication of the make or break of the contacts may stra...
Page 18: ...the valance and slacken the two rear securing nuts 3 Move the forward end of the mounting platform away from the valance and insert the two coupling tubes through the valance Page JO holes locating th...
Page 19: ...clamping bolt and rotate the crank lever until it slopes 60 forward of the vertical down ward position 3 Place the gear shaft crank lever loosely in position on the gear shaft 4 Adjust the position o...
Page 20: ...r by a faulty diaphragm or a damaged core rubber insert Icing of the evaporator may be caused by a leaking valve or incorrect operation due to a faulty or wrongly set thermostat THE REAR WINDOW DE MIS...
Page 21: ...cating spherical bushes which are self aligning to ensure smooth operation Two speeds medium and high are provided by the incorporation of a resistance in the circuit which is by passed when the upper...
Page 22: ...described for the oil level check When the cylinder head is removed examine the valves and cylinder bores A damaged valve will necessitate changing the valve plate assembly where a cylinder bore is ba...
Page 23: ...ounted on the compressor body and two copper collector rings attached to the inner face of the flywheel The electromagnet attracts the drive plate which is fitted with a fibre friction facing to take...
Page 24: ...o permit withdrawal of the seal assembly Remove any roughness from the shaft surface by lightly stoning then coat all parts with refrigerant oil before re assembling Lubricant The following proprietar...
Page 25: ...the compressor for about ten seconds Whilst the gas is still passing tighten the oil filler plug and then the valve capnut Back seat both service valves and refit the protective caps THE CONDENSER Th...
Page 26: ...he charge only The charge must also be renewed if for any reason the system is opened to remove a faulty unit 1 Dfll ER To remove the unit release the pipe union at each end of the shell To renew the...
Page 27: ...and is connected in the by pass line between the compressor pipe and the condenser The purpose of this valve is to maintain a minimum pressure of 2 lb sq in on the low pres sure side of the system To...
Page 28: ...te These filters are self cleaning and will generally require no attention Every 10 000 miles or annually whichever is the shorter period Discharge the system until the pressure falls to approximately...
Page 29: ...TECiO LAMP TUBE FLARING TOOL 4 T UBE CUTTING TOOL 5 6 l Q 3 i i S SPANNER ns A F e7S A F b SPANNER 1 oo n A f _ r o in A F 7 RATCHET WP ENCH 2SO in SQUl I E B THHMOMETH Sf RING MLANCE Fig 16 Se l ice...
Page 30: ...n eye dropper to wash away the Freon The eye should not be rubbed as this will increase the area of injury If the eye remains painful after a few minutes the wash should be repeated using a sterile sa...
Page 31: ...y and will result in insufficient cooling and high compressor head pressures Blowers and compressor opera ting No cooling Possible causes are as follows 1 Low refrigerant charge 2 An inoperative therm...
Page 32: ...e obstruction using dry compressed air or if necessary fit a new pipe 4 Check the superheat reading see Page 26 reset or if necessary renew the expansion valve 5 Inspect the temperature control phials...
Page 33: ...the pressure gauge reading should be 60 F 15 6 C I00 150 lb Isq in so F 24 7 C 140 190 lb sq in 100 F 37 8 C 180 240 lb Isq in l l0 F 43 3 C 230 280 lb sq in Superheat test The system may be checked f...
Page 34: ...s travel Open the pressure valve of the manifold gauge set by turning it fully anti clockwise Press11re Temperature lb leq io F 36 39 37 40 38 41 39 42 40 43 5 41 44 S 42 45 5 43 46 S 44 47 5 45 48 5...
Page 35: ...manifold gauge set vacuum valve and back seat the compressor low pressure service valve by turning it anti clockwise Close the valve of the refrigerant container and disconnect the centre hose Start...
Page 36: ...ctor Lamp RH 527 see under pressure tests for appropriate figures In order to obtain the correct pressure it may be necessary to re charge the system a Fig 18 f omprcssor service valve backward seated...
Page 37: ...0 To prevent loss of engine coolant when disconnecting the pipes from the heater matrix drain the radiator matrix or alternatively seal the heater pipes immediately they are dis connected by insertin...
Page 38: ...t the pipes between the expansion valves and the solenoid valves Secure the evaporator return pipe union at the valance Teejunction Evacuate and sweep the system then check for leaks refer to the appr...
Page 39: ...I AIR CONDITIONING REFRIGERATION O M C UNIT...
Page 40: ...CONTENTS DESCRIPTION SECTION Cl OPERATING THE SYSTEM SECTION C2 ELECTRICAL COMPONENTS SECTION C3 COMPRESSOR CONTROL VALVES AND ANCILLARY UNITS SECTION C4 MAINTENANCE SECTION CS SERVICING SECTION 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: ...il Level To Check To Purge the Air Magnetic Clutch Eaton Clutch Electro Lock Clutch Shaft Seal to Renew Tecumseh HH York A 209 Maintenance Safety Device Schedules Storage Servicing Charging Chemical S...
Page 43: ...aw PRESSURE VAPOUR D HI PRESSURE VAPOUR HIGH PRESSURE LIQUID LOW PRESSURE LIQUID CONDENSER COMPRESSOR TEMPERATURE CONT OL PHIAl I EXPANSION VALVE SIGHT GLASS Fig 1 Refrigerant Circlllation Diagram V...
Page 44: ...the condenser creates a heat transfer between these two media Condensation of the vapour occurs creating a liquid refrigerant see Fig 3 The high pressure and high temperature liquid now passes to the...
Page 45: ...gerant into the eva porator coil depending upon the degree of superheat exrstmg at the evaporator outlet It should be clearly pointed out that no attempt to alter the factory setting of the expansion...
Page 46: ...alance is connected to the condenser and to a r connection on the suction side of the compressor As the valve opens high pressure vapour from the condenser is mixed with the low pressure vapour from t...
Page 47: ...he second installation No 2 is similar except that on the extreme right of the push button control switch panel is an additional toggle type switch TO OPERATE No 1 INSTALLATION A Turn the switch marke...
Page 48: ...TORS RE AUXILIARY FUSE TO EARWI Ol HISTU REAP WINDO DE MISTER RELAY LOOM I LACk 8Ul WHITE Fig 6 Wiring Diagralll 7 BUTTON SWITCH PANEL 1 S L _ K OOff LOWER AIR CONDITIONING SWITCH B111 II 3 Q i C Q a...
Page 49: ...e tapping for medium speed motor operation THE BLOWER MOTORS The twin blower motors are situated at each end of the evaporator casing in the boot They are identicaI units and are self 1 ubricating thu...
Page 50: ...the co 11 pressor This prevents too low a temperature i11 the evaporator matrix w hich could cause icing of the fi11s and rc duced airnow I 2 3 4 A 11 in lernul adj u trncnt screv is prnvided t or ini...
Page 51: ...ised the core is drawn up wards and the refrigerant flows through two small holes in the rubhcr diaphragm which mounts the nozzle leaving via the nozzle orifice Since the total area of the two inlet h...
Page 52: ...C 0 Air Conditioning System Manual Section C4 Rolls Royce Bentley B IOI Fig 10 Tecumseh Compressor Exploded View...
Page 53: ...pressor service valves and release the compressor pressure as described for the oil level check Release the screws securing the service valves to the compressor Remove the gauze filter from the compre...
Page 54: ...nto the bore of the clutch Screw in the bolt just far enough to free the clutch from the crankshaft then withdraw the clutch and remove the bolt Extract the spring ring from the clutch shaft and withd...
Page 55: ...age the drive pins on the shaft bearing journal face If the carbon ring is separate place it in the ring retainer so that the polished surface is facing out The carbon ring must engage the driving lug...
Page 56: ...ment cap nut 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...
Page 57: ...to the drier A fusible plug inserted at the base of the unit prevents explosion in the event of fire Under no circumstances must thi he replaced by a solid plug I SIGHT GLASS 2 RECEIVER 3 DRIER Fig 15...
Page 58: ...the compressor driving belts A 6 lb load applied at the mid point of the drive side run of either belt should cause a deflection of i in 2 Using compressed air thoroughly clean the condenser matrix fi...
Page 59: ...in A F RH 532 Wrench Ring 750 in A F x 1 000 in A F RH 533 Wrench Ratchet 250 in square RH 5J8 Manifold Gauge Set Assembly ri 9 I 8 8 6 MANIFOLD GAUGE SET 2 LEAK DETECTOR LAMP J TUBE FLARING TOOL f TU...
Page 60: ...ncy The Sealing of Components Whenever it becomes necessary to hreak a refri gerant connection the exposed ends should be immediately capped Air entering the system will carry moisture which collects...
Page 61: ...com pressor service valves are not fully opened as this closes the system delivery and damage to the com pressor and lines could occur Run the engine at a fast idle with the Air Con ditioning system...
Page 62: ...ng of the compound gauge indicates a restriction in the expansion valve port such as internal icing condition or a blocked expansion valve screen SUPERH AT TEST The system may be checked for correct o...
Page 63: ...vacuum valve of the manifold gauge set by rotating it in a clockwise direction Just crack the low pressure service valve by giving half a turn in a clockwise direction Start the engine and run on slo...
Page 64: ...the manifold centre hose joint and purge the air for a few seconds then re tighten Hook a spring balance to the refrigerant container Sec1inn C6 and record the weight Open the vacuum valve of the man...
