Mitsubishi Montero 1987 Service Manual download pdf (Page 264)

24-28

AIR-CONDITIONING-Safety Precautions

SAFETY PRECAUTIONS

N24PAAB

SAFETY PRECAUTIONS

The refrigerant used in all air-conditioning installations is R-12. It is transparent and colorless in both the liquid and

vapor state. Since it has a boiling point of -29.8T (-21.7”F). at atmospheric pressure, it will be a vapor at all normal

temperatures and pressures. The vapor is heavier than air, non- flammable, and nonexplosive. It is nonpoisonous

except when it is in direct contact with open flame. It is noncorrosive except when combined with water. The

following precautions must be observed when handling R-12.

Caution

Wear

safety

goggles when servicing the refrigeration system.

R-12 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 air- conditioning 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. RI12 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.

Caution

Do not heat R-12 above 52°C (125°F).

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 52°C

(125°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.

Caution

Keep R-12 containers upright when charging the system.

When metering R-12 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.

Caution

Always work in a well-ventilated room.

Good ventilation is vital in the working area. Always discharge the refrigerant into the service bay exhaust system

or outside the building. Large quantities of refrigerant vapor in a small, poorly ventilated room can displace the air

and cause suffocation.

Although R-12 vapor is normally nonpoisonous, contact with an open flame can cause the vapor to become very

poisonous. Do not discharge large quantities of refrigerant in an area having an open flame. A poisonous gas is

producted when using the flame-type leak detector. Avoid inhaling the fumes from the leak detector.

Caution

Do not allow liquid refrigerant to touch bright metal.

Refrigerant will tarnish bright metal and chrome surfaces, and in combination with moisture’can severely corrode

all metal surfaces.

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Mitsubishi Montero 1987 Service Manual Page 264

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Mitsubishi Montero 1987 Service Manual Page 264

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