2010 JAGUAR XFR Workshop Manual

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Page 1697 of 3039

JAGUAR XFR 2010 1.G Workshop Manual www.JagDocs.com

Page 1698 of 3039

JAGUAR XFR 2010 1.G Workshop Manual Published: 11-May-2011
Climate Control - Air Conditioning - System Operation and Component Description
Description and Operation

General System Operation

To accomplish the transfer of heat,

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JAGUAR XFR 2010 1.G Workshop Manual 1 Evaporator 2 Thermostatic expansion valve 3 High pressure servicing connection 4 Refrigerant pressure sensor 5 Engine cooling fan 6 Condenser 7 Receiver/Drier 8 A/C compressor 9 Low pressure servici

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JAGUAR XFR 2010 1.G Workshop Manual 1 Pressure relief valve 2 Outlet port 3 Inlet port 4 Solenoid valve 5 Electrical connector 6 Pulley The A/C compressor circulates refrigerant around the system by compressing low pressure, low tempera

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JAGUAR XFR 2010 1.G Workshop Manual

Item Description 1 RH (right-hand) end tank 2 Condenser core 3 LH (left-hand) end tank 4 Mounting brackets (4 off) 5 High pressure compressor discharge line connector block 6 High pressure liqui

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JAGUAR XFR 2010 1.G Workshop Manual
Thermostatic Expansion Valve

Item Description 1 Metering valve 2 Housing 3 Diaphragm 4 Temperature sensor 5 Outlet passage from evaporator 6 Inlet passage to evaporator The thermostatic expan

Thermostatic Expansion Valve

Item Description 1 Metering valve 2 Housing 3 Diaphragm 4 Temperature sensor 5 Outlet passage from evaporator 6 Inlet passage to evaporator The thermostatic expansion valve meters the flow of refrigerant into the evaporator, to match the refrigerant flow with the
heat load of the air passing through the evaporator.

The thermostatic expansion valve is a block type valve located behind the heater assembly, and attached to the inlet and
outlet ports of the evaporator. The thermostatic expansion valve consists of an aluminium housing containing inlet and outlet
passages. A ball and spring metering valve is installed in the inlet passage and a temperature sensor is installed in the outlet
passage. The temperature sensor consists of a temperature sensitive tube connected to a diaphragm. The bottom end of the
temperature sensitive tube acts on the ball of the metering valve. Pressure on top of the diaphragm is controlled by the
evaporator outlet temperature conducted through the temperature sensitive tube. The bottom of the diaphragm senses
evaporator outlet pressure.

Liquid refrigerant flows through the metering valve into the evaporator. The restriction across the metering valve reduces the
pressure and temperature of the refrigerant. The restriction also changes the liquid stream of refrigerant into a fine spray, to
improve the evaporation process. As the refrigerant passes through the evaporator, it absorbs heat from the air flowing through
the evaporator. The increase in temperature causes the refrigerant to vaporise and increase in pressure.

The temperature and pressure of the refrigerant leaving the evaporator acts on the diaphragm and temperature sensitive tube,
which regulate the metering valve opening and so control the volume of refrigerant flowing through the evaporator. The warmer
the air flowing through the evaporator, the more heat available to evaporate refrigerant and thus the greater volume of
refrigerant allowed through the metering valve. www.JagDocs.com

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JAGUAR XFR 2010 1.G Workshop Manual pressure/temperature regimes. Larger diameter pipes are installed in the low pressure/temperature regime and smaller
diameter pipes are installed in the high pressure/temperature regime.
Low and hig

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JAGUAR XFR 2010 1.G Workshop Manual
Climate Control - Control Components - Component Location
Description and Operation

NOTE: RHD (right-hand drive) vehicle shown, LHD (left-hand drive) vehicle similar.

Component Location Pub

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