Brooks Polycold MaxCool 2500L - Page 228

Appendices Polycold Cryochiller
Procedure Installation and Operation Manual
Brooks Automation
12-18 214072 Revision B
19. For a Service Bypass Line:
• Close the service bypass line hand valve.
For a Three-Port Refrigeration Manifold:
• Close the High Pressure Hand Valve.
For a Four-Port Refrigeration Manifold:
• Close both the High Pressure Hand Valve and the Vapor Charging Hand Valve.
20. Close the Evac Ckt 1 hand valve that are opened for evacuation.
21. Turn off the compressor by turning the Compressor On/Off toggle switch to Off.
22. For a Service Bypass Line:
Observe the compound pressure gauge on the service bypass line for 2 minutes.
• If the pressure rises, go to step 4 and close the hand valves tighter and start over from step
3.
• If the pressure does not rise after 2 minutes, turn the compressor suction service valve fully
out to the back seated position.
For a Three or Four-Port Refrigeration Manifold:
Observe the Low Pressure Gauge on the manifold for 2 minutes.
• If the pressure rises, go to step 4 and close the hand valves tighter and start over from step
3.
• If the pressure does not rise after 2 minutes, turn the compressor suction service valve fully
out to the back seated position.
23. Confirm that the evacuation port Evac Ckt 1 hand valve is closed.
24. Press the Enter key on the HMI keypad.
25. Disconnect all ¼” lines and “T” adapters from the compressor Low Pressure Service Suction Port
and Evac Port(s).
26. Reinstall the caps on the evacuation hand valve and the compressor low pressure service suction
port.
27. Recheck the “packing nut” on the Evacuation Valve for proper tightness to prevent possible leaks.
Step Action