Chrysler Dodge Caravan 2002 Manual page 2340

RS
EVAPORATOR
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 97
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
REMOVAL
REMOVAL - REAR EVAPORATOR
REMOVAL - EVAPORATOR LINE
EXTENSION . . . . . . . . . . . . . . . . . . . . . . . . . 98
INSTALLATION
INSTALLATION - REAR EVAPORATOR
INSTALLATION - EVAPORATOR LINE
EXTENSION . . . . . . . . . . . . . . . . . . . . . . . . . 99
EXPANSION VALVE
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 99
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 100
DIAGNOSIS AND TESTING - EXPANSION
VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 101
HEATER CORE
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . 101
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 101
EVAPORATOR
DESCRIPTION
The rear evaporator is located in the rear heater-
A/C unit housing, behind the right rear wheel house.
The evaporator is positioned in the rear heater-A/C
housing so that all air that enters the housing must
pass over the fins of the evaporator before it is dis-
tributed through the system ducts and outlets. How-
ever, air passing over the evaporator fins will only be
conditioned when the compressor is engaged and cir-
culating refrigerant through the evaporator tubes.
The rear heater-A/C unit housing must be removed
from the vehicle to access the evaporator for service.
The evaporator cannot be adjusted or repaired and, if
faulty or damaged, it must be replaced.
OPERATION
Refrigerant enters the rear evaporator from the
rear expansion valve as a low-temperature, low-pres-
sure liquid. As air flows over the fins of the evapora-
tor, the humidity in the air condenses on the fins,
and the heat from the air is absorbed by the refrig-
erant. Heat absorption causes the refrigerant to boil
and vaporize. The refrigerant becomes a low-pressure
gas when it leaves the evaporator.
PLUMBING - REAR
TABLE OF CONTENTS
page
STANDARD PROCEDURE - HEATER CORE
REMOVAL
INSTALLATION
. . . . . . . . . 97 HEATER HOSE
REMOVAL
INSTALLATION
SUCTION LINE
. . . . . 99 REMOVAL
INSTALLATION
UNDERBODY LINES
DESCRIPTION
OPERATION
REMOVAL
INSTALLATION
REMOVAL
REMOVAL - REAR EVAPORATOR
WARNING: REFER TO THE APPLICABLE WARN-
INGS AND CAUTIONS FOR THIS SYSTEM BEFORE
PERFORMING
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT - WARNING - A/C PLUMBING),
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT - CAUTION - A/C PLUMBING),
and (Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT - WARNING - HEATER PLUMB-
ING).
(1) Remove the rear heater-A/C unit housing from
the vehicle. (Refer to 24 - HEATING & AIR CONDI-
TIONING/DISTRIBUTION - REAR/REAR HEATER-
A/C HOUSING - REMOVAL).
(2) Remove the rear evaporator line extension from
the expansion valve. (Refer to 24 - HEATING & AIR
CONDITIONING/PLUMBING
TOR - REMOVAL - EVAPORATOR LINE EXTEN-
SION).
(3) Remove the rear expansion valve from the rear
evaporator. (Refer to 24 - HEATING & AIR CONDI-
PLUMBING - REAR
FILLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
. . . . . . . . . . . . . . . . . . . . . . . . 103
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
. . . . . . . . . . . . . . . . . . . . . . . . 103
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
. . . . . . . . . . . . . . . . . . . . . . . . 105
. . . . . . . . . . . . . . . . . . . . . . . . 106
. . . . . . . . . . . . . . . . . . . . . . . . . . 106
REMOVAL - REAR HEATER LINES
REMOVAL - REAR AIR CONDITIONING
LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
INSTALLATION - REAR HEATER LINES . . . . 108
INSTALLATION - REAR AIR CONDITIONING
LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
THE FOLLOWING
24 - 97
page
. . . . . . . 107
OPERATION.
- REAR/EVAPORA-