Nissan Terrano model r20 series 2004. Manual — part 352
Component Layout
NHA339
DESCRIPTION — Overall System
HA-8
Air Flow
NHA332
DESCRIPTION — Overall System
HA-9
Refrigeration Cycle
REFRIGERANT FLOW
The refrigerant flows in the standard pattern, that is, through the compressor, the condenser, the liquid tank,
through the evaporator, and back to the compressor.
The refrigerant evaporation through the evaporator coil is controlled by an externally equalized expansion
valve, located inside the evaporator case.
FREEZE PROTECTION
The compressor cycles on and off to maintain the evaporator temperature within a specified range. When the
evaporator coil temperature falls below a specified point, the thermo control amplifier interrupts the compres-
sor operation. When the evaporator coil temperature rises above the specification, the thermo control ampli-
fier allows compressor operation.
REFRIGERANT SYSTEM PROTECTION
Dual-pressure switch
The refrigerant system is protected against excessively high or low pressures by the dual-pressure switch,
located on the liquid tank. If the system pressure rises above, or falls below the specifications, the dual-pres-
sure switch opens to interrupt the compressor operation.
Pressure relief valve
The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compres-
sor. When the pressure of refrigerant in the system increases to an unusual level [more than 3,700 kPa (37.0
bar, 37.7 kg/cm
2
, 537 psi)], the release port on the pressure relief valve automatically opens and releases
refrigerant into the atmosphere.
RHA341I
DESCRIPTION — Refrigeration System
HA-10
Special Service Tools
Tool number
Tool name
Description
KV99231260
Clutch disc wrench
Removing shaft nut and clutch disc
KV992T0001
Clutch disc puller
Removing clutch disc
KV992T0002
Pulley installer
Installing pulley
PREPARATION
HA-11
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