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NOTE : STEPS 1, 2 AND 3 APPLY ONLY TO A
STEP 1.
STEP 2.
STEP 3.
STEP 4.
STEP 5.
STEP 6.
COMPLETELY EVACUATED SYSTEM.
TO ADD ADDITIONAL REFRIGERANT
TO A CHARGED SYSTEM, REFER TO
STEPS 6 THROUGH 9.
REMOVE HIGH PRESSURE CHARGING VALVE CAP AND
LOOSELY CONNECT CHARGING LINE OF DRUM TO VALVE.
OPEN REFRIGERANT DRUM VALVE SLIGHTLY TO PURGE
AIR FROM CHARGING LINE. CLOSE REFRIGERANT DRUM
VALVE AND TIGHTEN CONNECTION AT CHARGING VALVE.
SET THE REFRIGERANT DRUM IN AN INVERTED POSITION
ON A SCALE. DO NOT OPERATE THE AIR CONDITIONER.
OPEN CHARGING LINE VALVE AND CHARGING VALVE
AND CHARGE REFRIGERANT SYSTEM UNTIL SYSTEM AND
DRUM PRESSURES HAVE EQUALIZED OR UNTIL 5.5 POUNDS
OF REFRIGERANT HAVE ENTERED THE SYSTEM.
CLOSE VALVES AND CAREFULLY LOOSEN THE CHARGING
LINE TO RELEASE TRAPPED PRESSURE. DISCONNECT
CHARGING LINE AND INSTALL CHARGING VALVE CAP.
OPERATE AIR CONDITIONER IN COOLING MODE FOR 15
MINUTES.
CHECK LIQUID SIGHT INDICATOR. IF SYSTEM IS SHORT OF
REFRIGERANT, GAS BUBBLES WILL APPEAR REGULARLY IN
THE INDICATOR. IF REFRIGERANT SYSTEM IS UNDER-
CHARGED, ADD ADDITIONAL REFRIGERANT FOLLOWING
STEPS 6 THROUGH 9.
USING SAME DRUM AND CHARGING LINE, PLACE DRUM IN
AN UPRIGHT POSITION ON A SCALE. REMOVE CAP FROM
LOW PRESSURE (SUCTION STEP E) CHARGING VALVE AND
LOOSELY CONNECT CHARGING LINE TO VALVE. PURGE
AIR FROM LINE AS IN STEP 2.
CAUTION:
WHEN ADDING REFRIGERANT, USE EXTREME CARE TO
AVOID ADDING REFRIGERANT TO THE SYSTEM TOO FAST
WHICH WOULD CAUSE SLUGGING AT THE COMPRESSOR.
STEP 7.
STEP 8.
STEP 9.
WITH THE AIR CONDITIONER OPERATING, ADMIT GAS TO
SYSTEM SLOWLY (APPROXIMATELY 1 OUNCE PER MINUTE).
CONSTANTLY OBSERVE DRUM WEIGHT TO INSURE THAT
ONLY 5.5 POUNDS TOTAL WEIGHT OF REFRIGERANT IS
IN SYSTEM.
REPEAT STEP 4.
CHECK LIQUID SIGHT INDICATOR. IF INDICATOR REGULARLY
SHOWS BUBBLES, REPEAT STEPS 6 THROUGH 8 ADDING REFRIG-
ERANT IN 4 OUNCE INCREMENTS UNTIL INDICATOR IS CLEAR.
Figure 6-2. Charging refrigerant system (sheet 2 of 2).
6-5
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