stop start MITSUBISHI ECLIPSE 1991 Owner's Guide

24-20 HEATERS AND AIR CONDITIONING - Service Adjustment Procedures
20A0465
20A0466
EVACUATING SYSTEMWhenever the system has been opened to the atmosphere, it
is absolutely essential that the system be evacuatedor
“vacuumed” to remove all the air and moisture. Air in the
refrigerant system causes high compressor discharge
pres-sures, a loss in system performance, and oxidation of the
compressor oil into gum and varnish. Moisture in the
re-
frigerant system can cause the expansion valve to malfunction.Under certain conditions, water can react with the refrigerant
to form destructive acids. It is necessary to adhere to followingprocedure to keep air and moisture out of the system.
(1) Check to ensure that there is no internal pressure in the
equipment. If there is an internal pressure, it should be
relieved through the check valve.
(2) Connect the charging hoses of the gauge manifold to the
inlet and outlet check valves of the compressor.
(3) Connect a vacuum pump to the charging hose. Repeat
evacuation in the following sequence.
Repeat
) Start the vacuum pump.I-
bIICompound pressure gauge indicates
100 kPa (15 psi.).IOperate the vacuum pump for mofe
Fourthtime
IStop the vacuum pump.IbReplace the vacuum pump with the
service can.stop
the
vacu-
;Ummp.
1
Discharge air from inside the charging
hose.
bCharge refrigerant from the low pressure
;s”;pf the gauge manifold. [49 kPa (7
Ga;iejmanifold low pressure valveI
Connect the vacuum pump to the charg-
ing hose.
INOTE
(1) Do not use the refrigerant pressure to expel air.
(‘2) Do not use the. compressor for evacuation.___(3)Do not operate the compressor In the vacuum condrtlon; shaft seal leaks
could occur.
three
times