Appendices Polycold Cryochiller
Procedure Installation and Operation Manual
Brooks Automation
12-14
214072 Revision B
3. Turn off the Polycold Cryochiller.
If the unit has the Rapid Balance Pressure Option, perform a Rapid Balance Pressure Check.
Otherwise, wait for at least two hours for the system to come to ambient temperature
4. Open the valve box.
Close the Cold Gas Feed, Hot Gas Feed, and Common Return hand valves.
5. If using a Service Bypass Line:
• Close the hand valve on the service bypass line by turning the handle fully clockwise.
If using a Three or Four-Port Refrigeration Manifold:
• Close all manifold hand valves by turning them clockwise.
6. Remove the caps from the output end of the Evac Ckt 1 hand valves in the valve box for the circuit
being evacuated.
Step Action
Cold Gas Feed
Valve
Evac Ckt 1
Valve
Hot Gas Feed
Valve
Common Return
Valve
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