1989-Mitsu-Factory Manual · AC system · страница 25 из 42 · Открыть оригинал PDF ↗
Keep the refrigerant manifold valves capped when
not in use.
Keep a supply of extra refrigerant-can-to-refriger-
ant-manifoid gaskets on hand so that gaskets can
be replaced periodically. This will insure a good
seal without excessive tightening of the can or the
manifold nuts.
(1) Attach center hose from manifold gauge set to
refrigerant dispensing manifold. Turn refriger-
ant manifold valves completely counterclock-
wise so they are fully open. Remove protective
caps from refrigerant manifold.
(2) Screw refrigerant cans into manifold. Be sure
manifold-to-can gasket is in place and in good
condition. Tighten can and manifold nuts to 8
to 11 Nm (6 to 8 ftlbs.)
(3) Turn refrigerant manifold valves completely
clockwise to puncture the cans and close the
manifold valves.
(4) Purge the air from the charging line by loosen-
ing the charging hose at the gauge set mani-
fold and turning one of the refrigerant valves
counterclockwise to release refrigerant. When
the refrigerant gas starts escaping from the
loose connection, re-tighten the hoses.
Caution
Never heat small refrigerant cans over 52°C
(125°F) as they may explode.
(5) Fullv oaen all refriaerant manifold valves beina
used and place tee cans of refrigerant into s
pan containing 52°C (125°F) water will warm
the charging can and aid in the transfer of the
charge into the system. Place the water pan
and refrigerant cans on a scale and note the
weight.
(6) Jump the low pressure switch terminals locat-
ed on the receiver drier so the clutch will
remain engaged.
(7) Start the engine and move the controls to air
conditioner switch on and low blower position.
The low pressure switch will prevent the clutch
from engaging until refrigerant is added to the
system. If the clutch does engage, replace the
switch before proceeding any further.
63) Charge through the suction side of the system
by slowly opening the suction manifold valve.
Adjust the valve as necessary so charging
pressure does not exceed 345 kPa (50 psi).
Maintain the temperature of the water in the
pan by adding warm water as necessary. Note
the weight of water added, to ensure accuracy
when determining amount of refrigerant added
to system.
(9) Adjust the engine speed to a fast idle of
approximately 1,500 rpm.
(10)When specified refried refrigerant charge 900
(31.7 Ibs.) has entered the system, close the
gauge set manifold valves. refrigerant manifold
valves, and reconnect wiring. tach can con-
tains 397 g (14 oz.) of R-12. Use 2 l/2 cans.
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