Mitsubishi 3000GT 1991, Service Manual

Page: 1094 / 1146

55-12
HEATERS AND MANUAL AIR
Adjustment Procedures
CHARGING SYSTEM
valve
Vacuum meter
T S B
Hold this
for 5 minutes.
Gas leak check
is evident
Refrigerant charge
The refrigerant system must have been evacuated using the
previous procedure before charging.
Charge using only R-12 refrigerant.
R-12
is available in bulk
tanks or small cans. Follow the safety precautions for handling
R-12 as listed in this group.
CHARGING THE REFRIGERANT
CHARGING WITH SMALL CANS
using disposable cans of this type, follow carefully the
can manufacturers instructions.
Start up the vacuum pump.
Caution
1. Do not use the compressor for evacuation.
2. Do not operate the compressor in the vacuum
condition; damage may occur.
(2) Evacuate to a vacuum reading of 100 (89.5 psi) or
higher (approx. minutes).
(3) Turn back the high pressure side adaptor valve all the way
and close the service valve.
(4) Stop the vacuum pump and allow to stand for 5 minutes.
(5) Check for leaks. (Good if the vacuum is held.)
(6) Tighten the charge valve handle to puncture the service
can.
(7) Open the charge valve to charge the system with re-
frigerant.
(8) When the refrigerant is no longer drawn in, turn back the
low pressure side adaptor valve handle all the way and
close the service valve.
(9) for gas leaks using a leak detector.
vision