Pajero II Workshop Manual 1991 · Отопление, кондиционирование и вентиляция · страница 70 из 118 · Открыть оригинал PDF ↗

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<Vehicles using R-134a refrigerant >

Because R-134arefrigerant isa hydrofluorocarbon
(HFC) which contains hydrogen atoms in place of
chlorineatoms,willnotcause damagetothe
ozone layer.

Ozone filters out harmful radiationfromthe sunTo
assist in protecting the Ozone layer; Mitsubishi Motors
Corporation recommends an R-134a refrigerant re-
cycling device.
Refrigerant R-134a is transparent and colorless in
both the liquid and vapor state. Since it has a boiling
point of -29.88C (-21.7PF1. at atmospheric pressure.
it will bea vapour at all normal temperatures and
pressures. The vapor is heavier than air,non-flam-
mable,andnonexplosiveThe following precautions
must be observed when handling R-134a.

When adding R-134a into the refrigeration svstem
keep the supply tank or cans in an upright position
the refrigerantcontainer isonitssideorupside
down; liquid refrigerantwillenter thesystemand
damage the compressor:

Caution

A leak detector for designed R-134a should
be used to check for refrigerant gas leaks:
2Donotallowliquidrefrigeranttotouch
bright metal.

Refrigerantwilltarnishbrightmetalandchrome
surfaces,andincombinationwithmoisturecan
severely corrode all metal surfaces

Caution

Wear safety goggles when servicing the refrigera- tion system.

R-134a evaporates so rapidly at normal atmospheric
pressures and temperatures thatit 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/CsystemKeepbottleof sterile
mineral oil handy when working on the refrigeration
system.Shouldany liquid refrigerant get intothe
eyes;usea few drops of mineral oil to wash them
out:R-134ais rapidlyabsorbedbytheoil,Next
splash the eyes with plenty of cool water.Call vour
doctorimmediately even though irritation has ceased
after treatment,

Caution

Do not heat R-134a above 40'C (104'F):

In most instancesmoderate heat is required to bring
the pressure of the refrigerant in its container above
the pressure of the system when charging or adding
refrigerant:
bucket or large pan of hot water not over 40PC
(104PF) is all the heat required for this purpose.Do
not heat therefrigerant container with a blow torch
or any other means that would raise temperature and
pressureabovethis temperature.Donot weld or
steam clean onor near the system components Or
refrigerant lines

Caution

Keep R-134a containers upright when charging
the system.

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