3.16 Electrical supply and RF earth (ground) connections
3.16.1 Reconfigure the iH system for your electrical supply (if necessary)
CAUTION
iH1000 systems are supplied already configured for your electrical supply. If you have an
iH1000 system, do not try to reconfigure the iH system. If you do, you may damage the iH
system.
Note: You cannot reconfigure an iH1000 system. If you want to use an iH1000 system with a different
electrical supply to that specified on the rating plate (Figure 3-9, item1), contact your supplier or
BOC Edwards.
CAUTION
Ensure that the cooling-water system of your iH system is correctly configured for your
electrical supply frequency. If it is incorrectly set at 50Hz, the system will run above
optimum operating temperature. If it is incorrectly set at 60Hz, the system will run below
optimum operating temperature.
Your iH system will be supplied correctly configured for your electrical supply; the Item
Number of the iH system (shown on the rating plate: Figure 3-9, item 1) specifies how the
system is configured: refer to Section 2.13.
If you want to use an iH80 or iH600 system with a different electrical supply, ensure that the
correct transformer primary tapping is selected before you connect the electrical supply to the
iH system; refer to Figure 3-8 and use the following procedure:
1. Undo the screws (5) which secure the cover (4) to the Electrics Box (2) and remove the cover.
2. Ensure that the common cable (6) is correctly connected to the common terminal on the
terminal-block (8).
3. Ensure that the voltage select cable (7) is connected to the correct voltage terminal of the
terminal-block (8) for your electrical supply.
4. Refit the cover (4) and secure with the two screws (5).
3-22 iH Dry Pumping Systems
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