Mitsubishi Galant 9G. Manual — part 231

The heater and cooling units are combined in a sin-
gle unit, which, with the mode film damper and flow
rate control valve in the heater unit, reduces ventila-
tion resistance, increases fan power, and decreases
noise.

SAFETY PRECAUTIONS

WARNING

Wear safety goggles and gloves when servic-
ing the refrigeration system to prevent
severe damage to eyes and hands.

Because R-134a refrigerant is a hydro fluorocarbon
(HFC) which contains hydrogen atoms in place of
chlorine atoms, it will not cause damage to the ozone
layer.
Ozone filters out harmful radiation from the sun. To
assist in protecting the ozone layer, Mitsubishi
Motors Corporation recommends an R-134a refriger-
ant recycling device.
Refrigerant R-134a is transparent and colorless in
both the liquid and vapor state. Since it has a boiling
point of

−29.8°C (−21.64°F) at atmospheric pressure,

it will be a vapor at all normal temperatures and pres-
sures. The vapor is heavier than air, non-flammable,
and non-explosive. The following precautions must
be observed when handling R-134a.

WARNING

Do not heat R-134a above 40

C (104.0

F) or it

may catch fire and explode.

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 min-
eral oil handy when working on the refrigeration sys-
tem.

1. Should any liquid refrigerant get into your eyes,

use a few drops of mineral oil to wash them out.
R-134a is rapidly absorbed by the oil.

2. Next, splash your eyes with plenty of cold water.
3. Call your doctor immediately even if irritation has

ceased.

CAUTION

Keep R-134a containers upright when charging
the system.
In most instances, moderate heat is required to bring
the pressure of the refrigerant in its container above
the pressure of the system when charging or adding
refrigerant.
A bucket or large pan of hot water not over 40

°C

(104.0

°F) is all the heat required for this purpose. Do

not heat the refrigerant container with a blow torch or
any other means that would raise temperature and
pressure above this temperature. Do not weld or
steam-clean on or near the system components or
refrigerant lines.

WARNING

The leak detector for R-134a should be used
to check for refrigerant gas leaks.

CAUTION

Do not allow liquid refrigerant to touch bright
metal or it will be stained.
When metering R-134a into the refrigeration system,
keep the supply tank or cans in an upright position. If
the refrigerant container is on its side or upside
down, liquid refrigerant will enter the system and
damage the compressor.
Refrigerant will tarnish bright metal and chrome sur-
faces, and in combination with moisture can severely
corrode all metal surfaces.

ITEM

SPECIFICATION

Heater control assembly

Dial type

Compressor

MSC105CA

Compressor Model

Scroll type

Refrigerant and quantity g (oz)

R-134a (HFC-134a), 590

− 630 (20.80 − 22.22)

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Mitsubishi Galant 9G. Manual — part 231

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