1997 MITSUBISHI TRITON Workshop Manual

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55-2
Vacuum Actuator Check Vehicles> 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Idle-up Solenoid Valve Check Vehicles> 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lever Position Switch Check Vehicles (A/T)> 20. . . . . . . . . . . . . . . . . . . . . . . . . .
HEATER CONTROL ASSEMBLY AND A/C
SWITCH 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HEATER UNIT AND HEATER CORE* 24. . . .
BLOWER ASSEMBLY AND RESISTOR
26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EVAPORATOR
28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . COMPRESSOR AND TENSION
PULLEY* 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONDENSER AND CONDENSER FAN
MOTOR 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REFRIGERANT LINE* 35. . . . . . . . . . . . . . . . . . .
ENGINE COOLANT TEMPERATURE
SWITCH 37. . . .
IDLE-UP SYSTEM Vehicles> 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LEVER POSITION SWITCH
40. . . . . . . .
VENTILATORS* 41. . . . . . . . . . . . . . . . . . . . . . . . .

± General Information HEATER, AIR CONDITIONER
AND VENTILATION55-3
GENERAL INFORMATION55200010121
The heater system uses a two-way-flow full-air-mix
system that features high performance and low
operating noise, and includes an independent face
air blowing function and a cool air bypass function.The A/C system is basically the same as the
conventional system, but a new refrigerant system
has been adopted as a response to restrictions
on the use of chlorofluorocarbons.
ItemsSpecifications
Heater unitTypeTwo-way-flow full-air-mix system
Heater control assemblyDial type
CompressorModelInclined-plate type
Dual pressure switch
kPa
High-pressure switchON
OFF: 2,648, OF
F ON: 2,059
kPa
Low-pressure switchON
OFF: 177, OFF
ON: 186
Refrigerant and quantity gR-134a (HFC-134a), Approx. 550 ± 600
SAFETY PRECAUTIONS
Because R-134a refrigerant is a hydrofluorocarbon
(HFC) which contains hydrogen atoms in place of
chlorine atoms, it will not cause damage to the
ozone layer.
Refrigerant R-134a is transparent and colourless
in both the liquid and vapour state. Since it has
a boiling point of ± 29.8
C, at atmospheric pressure,
it will be a vapour at all normal temperatures and
pressures. The vapour is heavier than air,
non-flammable, and nonexplosive. The following
precautions must be observed when handling
R-134a.Caution
Wear safety goggles when servicing the
refrigeration system.
R-134a evaporates so rapidly at normal
atmospheric pressures and temperatures that it
tends to freeze anything it contacts. For this reason,
extreme care must be taken to prevent any liquid
refrigerant from contacting the skin and especially
the eyes. Always wear safety goggles when
servicing the refrigeration part of the A/C system.
Keep a bottle of sterile mineral oil handy when
working on the refrigeration system. Should any
liquid refrigerant get into the eyes, use a few drops
of mineral oil to wash them out. R-134a is rapidly
absorbed by the oil. Next splash the eyes with
plenty of cold water. Call your doctor immediately
even though irritation has ceased after treatment.