Polycold Cryochiller Installation
Installation and Operation Manual Install the Refrigerant Lines
Brooks Automation
214072 Revision B 4-23
connected. These valves cannot be operated when they are at cryogenic temperatures.
10. Locate the refrigerant feed and return fittings on the upper right corner of the front of the refrigera-
tion unit.
Remove the brass blank-off fittings from the feed and return lines using the following procedure.
See Figure 4-16.
a. Use one wrench to hold the fitting on the refrigerant line steady.
b. Use a second wrench to carefully loosen the blank-off fitting from the refrigerant line.
c. Slowly remove the blank-off fittings from the feed and return couplings while listening for
refrigerant leakage.
– A brief hiss of refrigerant gas leakage is OK.
– Continuous escape of refrigerant is NOT OK. Quickly reinstall the blank-off fit-
tings and make certain the isolation valves are closed.
Figure 4-16: Polycold Cryochiller Refrigerant Lines with Standard Ultra Fittings
Circuit 1
Circuit 2
Feed
Lines
Return
Lines
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