Return refrigerant to normal operating conditions – Carrier 17/19EX User Manual
Page 193
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Return Refrigerant to Normal Operating Conditions
1. Be sure that the vessel that was opened has been evacuated 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 valve 5, gradually increasing pressure in the evacuated vessel to 35 psig
(141 kPa) for HFC-134a. Feed refrigerant slowly to prevent freezeup.
5. Perform leak test at 35 psig (141 kPa).
6. Open valve 5 fully. Let vessel pressures equalize.
7. Open valves 9 and 10.
8. Open valve 7 to equalize liquid refrigerant levels.
Valve
1
2
3
4
5
6
7
8
9
10
11
Condition
C
C
C
C
C
C
C
C
Valve
1
2
3
4
5
6
7
8
9
10
11
Condition
C
C
C
C
C
C
C
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