Brooks On-Board 8, Installation And Maintenance Instructions Manual

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Cryo-Torr 8600 Compressor Operation, Installation and Maintenance Guide
©2013 Brooks Automation Inc. Pub. No. 8040564, Rev. AA, 01/15/13 ECO No. 64541 4-7
4. Open the ball valve using the extended handle. Open the Hoke
valve. Purge the manifold for 30 seconds, close the ball valve, then
close the Hoke valve.
Steps 2 - 4 are required to ensure that the regulator, charging line and the
maintenance manifold will be purged of air and that the air trapped in the
regulator will not diffuse back into the helium bottle. For best results,
CTI-CRYOGENICS suggests the use of a dedicated helium bottle,
regulator and charge line which are never separated.
Once Step 4 has been completed, all of the coldheads have been cooled and
the gaseous contaminant frozen in the coldhead. The maintenance manifold
has also been connected to the helium bottle and filled with clean helium.
NOTE: The helium SUPPLY line should be disconnected first to prevent
the crosshead relief valve from opening.
5. While each On-Board GLE Cryopump is still operating, disconnect
the helium SUPPLY line at all of the coldheads on the same
manifold. The On-Board GLE Cryopump helium supply line is
shown in
Figure 4-2 .
CAUTION
Be sure to use two wrenches to ensure that the self sealing coupling adapter does not back
out during disassembly. Disconnect the helium supply line. Refer to
Figure 4-4 .