Brooks On-Board 8, Installation And Maintenance Instructions Manual

Page: 30 / 56

2-4 ©2013 Brooks Automation Inc. Pub. No. 8040564, Rev. AA, 01/15/13 ECO No. 64541
Purge Gas Connection
Connect your purge gas supply line to the purge valve 1/8 NPTF fitting.
Adjust the supply pressure to 10 - 25 psig or 40 - 80 psig, depending upon
the label on the purge valve, yielding 1-2 cfm.
Helium Line Connections
Make the connections between the On-Board GLE Cryopump and
compressor. Refer to
Figure 1-6 or Figure 1-7 while making the component
interconnections.
1. Remove all dust plugs and caps from the supply and return
lines, compressor, and On-Board GLE Cryopump. Check all
fittings.
2. Connect the helium-return line from the gas-return connector on the
rear of the compressor to the gas-return connector on the On-Board
GLE Cryopump.
3. Connect the helium supply line from the supply connector on the
cartridge to the gas-supply connector on the On-Board GLE
Cryopump.
4. Attach the supply and return line identification decals
(CTI-CRYOGENICS supplied) to their respective connectors.
Verify proper helium supply static pressure as described in the Installation
Section of the appropriate Compressor Manual.
Auxiliary (AUX) TC Gauge Installation
You may purchase an auxiliary TC gauge tube, P/N 8112096 and an
auxiliary TC gauge cable assembly, P/N 8112098G001.
When used, the auxiliary TC gauge is an extra gauge that can be installed
on the User's equipment to read vacuum between 1 and 1000 microns. It
comes with a 1/8 NPT pipe thread. Screw the TC tube into a 1/8 NPT
fitting. Attach the auxiliary TC cable to the tube and to the connector on the
On-Board module. Refer to
Figure 2-2 .
NOTE: It may be necessary to zero the auxiliary TC gauge. Refer to the
appropriate On-Board Module Programming and Operation Instructions
for more information.
Setpoint Relays
When the setpoint relays are used, connection to the relays (R1 and R2) is
made via the Relays connector located on the On-Board Module. If your
On-Board GLE Cryopump configuration requires use of the setpoint