AIR CONDITIONING
35
SAFETY PRECAUTIONS
EVACUATION -
CONNECT CHARGING
STATION
CONNECT GAUGE
MANIFOLD
START VACUUM
PUMP -HIGH
PRESSURE and LOW
PRESSURE GAUGE
READINGS
(HP BELOW ZERO)
(LP BELOW ZERO)
EVACUATE /
DEHYDRATE
TO -1 kg / cm2
CONTINUE FOR
15 MINUTES
STOP PUMP
OBSERVE THAT
PRESSURE DOES NOT
RISE ABOVE - 0.9 kg / cm2
WITHIN 15 MINUTES
IF PRESSURE STABILISES
AT HIGHER LEVEL
RE-EVACUATE
IF PRESSURE
CONTINUOUSLY
RISES-LEAK TEST
RE-EVACUATE
AFTER
RECTIFICATION.
CHARGING (R 134a 660 ± 20 grms)
OPEN HIGH SIDE VALVES and
ALLOW AS MUCH AS
REFRIGERANT AS POSSIBLE
TO ENTER SYSTEM, BUT
NOT MORE THAN 660 ± 20 gms
CLOSE VALVES and ROTATE
COMPRESSOR FRONT
PLATE MANUALLY TO
ENSURE NO LIQUID IS
TRAPPED IN THE
COMPRESSOR
START ENGINE SET TO FAST
IDLE. (1500 - 1700 rpm) ACTIVATE
A/C SWITCH. SET CONTROL TO
MAXIMISE COOLING and
HIGH BLOWER SPEED
OPEN LOW SIDE VALVE and
COMPLETE THE CHARGING
PROCESS (IF REQUIRED)
CAUTION: DO NOT ALLOW
MORE THAN 3.5 kg / cm2
TO REGISTER ON THE
LOW SIDE GAUGE DURING
CHARGING
CLOSE ALL VALVES and TAPS.
REMOVE HIGH and LOW
FILLING HOSES. CONNECT
HIGH SIDE FILLING HOSE
TO RECOVERY UNIT INLET
SIDE. SWITCH ON
RECOVERY MACHINE and
REMOVE ALL
REFRIGERANT IN FILLING
HOSES
