Chrysler PT Cruiser Service & Repair Manual page 1913

PT
HEATING & AIR COND. - LHD (Continued)
EVACUATION
Before adding refrigerant, all air must be evacu-
ated from the system.
NOTE: Use the High Side service port on the dis-
charge line at the compressor and the low side ser-
vice port at the filter drier to attach your service
equipment. DO NOT use the high side service port
on the line next to the filter drier.
• Connect a manifold gauge set to the A/C service
ports (Fig. 2), (Fig. 3) or (Fig. 4).
• Use a vacuum pump or charging station and
evacuate system to 95 kPa (28 inches Hg) for 30 min-
utes.
• Go to Charging A/C System below.
Fig. 2 A/C Service Ports
1 - A/C SERVICE PORTS
2 - FILTER/DRIER
CHARGING A/C SYSTEM
The procedure below should be used to fill the
refrigerant charge in the air conditioning system.
This A/C system does not have or use a sight glass to
check or charge the system.
WARNING: REVIEW SAFETY PRECAUTIONS AND
WARNINGS IN THIS GROUP BEFORE CHARGING
THE REFRIGERANT SYSTEM.
AVOID BREATHING A/C REFRIGERANT AND LUBRI-
CANT VAPOR OR MIST. EXPOSURE MAY IRRITATE
EYES, NOSE AND THROAT. USE ONLY APPROVED
SERVICE EQUIPMENT MEETING SAE REQUIRE-
MENTS TO DISCHARGE R-134a SYSTEM. IF ACCI-
DENTAL SYSTEM
VENTILATE WORK AREA BEFORE RESUMING SER-
VICE.
R-134a SERVICE EQUIPMENT OR VEHICLE A/C
SYSTEM SHOULD NOT BE PRESSURE TESTED OR
DISCHARGE OCCURS,
HEATING & AIR COND. - LHD
Fig. 3 A/C Refrigerant Lines - Compressor
1 - LIQUID LINE
2 - SUCTION LINE
3 - COMPRESSOR
4 - DISCHARGE LINE
5 - HIGH SIDE SERVICE PORT
LEAK TESTED WITH COMPRESSED AIR. MIXTURE
OF AIR and R-134a CAN BE COMBUSTIBLE AT ELE-
VATED PRESSURES.
POTENTIALLY DANGEROUS AND MAY RESULT IN
FIRE OR EXPLOSION CAUSING INJURY OR PROP-
ERTY DAMAGE.
CAUTION: Do not overcharge refrigerant system, as
excessive compressor head pressure can cause
noise and system failure.
After the system has been tested for leaks and
evacuated, a refrigerant (R-134a) charge can be
injected into the system.
NOTE: When connecting the service equipment
coupling to the line fitting, verify that the valve of
the coupling is fully closed. This will reduce the
amount of effort required to make the connection.
(1) If using a separate vacuum pump close all
valves before disconnecting pump. Connect manifold
gauge set to the A/C service ports (Fig. 2) and (Fig.
3).
24 - 7
THESE MIXTURES ARE