TM 9-2320-363-34-1
8.
9.
LET THE NITROGEN FLOW AT 200 psi (1378 kPa) FOR 25 TO 30 SECONDS.
LOWER THE PRESSURE TO 4 psi (28 kPa) AND LET IT FLOW FOR 1 TO 2 MINUTES. IF THE
LINE OR PART WAS VERY WET, ALLOW IT TO FLOW UNTIL THERE IS NO TRACE OF
REFRIGERANT OIL OR SOLID BITS OF DIRT OR GRIT FLOWING FROM THE DRAIN TUBE.
10.
CLOSE THE NITROGEN BOTTLE CONTROL VALVE AND THE PURGING CONTROL VALVE
FIRST, THEN CLOSE THE SUPPLY LINE VALVE.
11.
DISCONNECT THE SUPPLY LINE VALVE AND THE DRAIN LINE. TIGHTLY CAP BOTH ENDS
OF THE PART OR LINE.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
RECOVER THE SYSTEM REFRIGERANT.
DISCONNECT BOTH ENDS OF THE LINE OR PART BEING FLUSHED. TIGHTLY CAP THE LINES
TO THE REST OF THE SYSTEM.
HEAT R-134a IN A DIAL-A-CHARGE OR PRESSURIZE THE REFRIGERANT AS RECOMMENDED
BY THE MANUFACTURER.
CONNECT THE DIAL-A-CHARGE OUTLET HOSE TO THE OUTLET SIDE OF THE SYSTEM (THIS
WILL ENSURE THAT R-134a WILL FLOW IN THE REVERSE DIRECTION OF NORMAL FLOW).
CONNECT A LINE FROM THE INLET SIDE OF THE SYSTEM TO A RECOVERY/RECYCLING
STATION.
NOTE
If the system is extremely contaminated, install a receiver-drier inline as a pre-filter for the
recovery/recycling station.
TURN ON THE RECOVERY/RECYCLING STATION AND OPEN THE OUTLET VALVE FOR THE
DIAL-A-CHARGE. ALLOW ABOUT 2 POUNDS (1 KILOGRAM) OF R-134a TO FLOW THROUGH
THE SYSTEM.
CLOSE THE SUPPLY LINE VALVE AND WAIT FOR THE RECOVERY STATION TO SHUT OFF.
DISCONNECT THE SUPPLY LINE AND THE DRAIN LINE FROM THE DIAL-A-CHARGE AND THE
RECOVERY STATION. CONNECT THE LINES TO A NITROGEN BOTTLE.
PURGE THE SYSTEM AND CHECK THE COLLECTION BOTTLE FOR CONTAMINANTS. REPEAT
THE PROCESS IF NEEDED.
DISCONNECT THE LINES FROM THE PART AND TIGHTLY CAP BOTH ENDS OF THE PART.
Change 1
11.1-7
