Polycold Cryochiller
Installation
Installation and Operation Manual
Install the Refrigerant Lines
Brooks Automation
214072 Revision B
4-19
Install a Cryobaffle
1.
If you are installing a Polycold “CB” type cryobaffle, carefully center it between the
flange bolt holes to assure a good O-ring seal.
2.
Verify that no moving parts will hit the cryosurface.
3.
Make sure the cryosurface does not touch the vacuum chamber wall or anything else in the vacuum
chamber. The cryosurface should be at least 16mm (5/8-inch) away from the vacuum chamber wall
to prevent ice bridging. Note that greater distances are better.
4.
Install a heat radiation shield if the cryobaffle is in direct view of a source of heat greater than 50°C.
Position the shield between the cryobaffle and the heat source. The shield should be as close as
possible to the heat source and as far away as possible from the cryobaffle. The cryobaffle traps
molecules best when it has maximum view of the vacuum chamber.
5.
Check the vacuum chamber for leaks. If any leaks are found, correct them before proceeding.
6.
Go to Installation Checklist
.
Initial and date this task. Go to the next task on the checklist.
Install the Refrigerant Lines
NOTICE
This procedure assumes that refrigerant lines from Brooks Automation, Inc.
Polycold Systems are being installed.
•
If installing a refrigerant lines not made by Polycold Systems, verify that the
refrigerant lines meet the required specifications.
•
Contact Brooks Polycold for assistance.
NOTICE
Dual-Circuit System
This section assumes both refrigerant circuits are connected at the same time.
It is possible to connect only one refrigerant circuit of a dual circuit system.
•
When connecting the second refrigerant circuit, the refrigerant mixture must
be fully drawn back into the unit.
•
Contact Brooks Automation Customer Support for more information.
