Return R e f rigeran t to Norma l O perating Conditio ns
1. Be sure that the vessel th at was opened has been evacu at ed and dehydrated.
2. Access the Control Test, terminate lockout function to view vessel pressures and to turn on
machine water pumps.
3. Open valves 1, 3, and 6.
4. Slowly open val ve 5, graduall y increasing press ure in the evacu ated vessel to 3 5 psig
(141 kPa) for HFC-134 a. Feed refrigerant slowly to prevent freezeup.
5. Perform leak test at 35 psig (141 kPa).
6. Open valve 5 fully. Let ves s e l pressures equalize.
7. Open valves 9 and 10.
8. Open valve 7 to equaliz e liq uid refrigerant level s.
Valve 1 2 3 4 5 6 7 8 9 10 11
Condition C CC CCCCC
Valve 1 2 3 4 5 6 7 8 9 10 11
Condition C C CCCCC