6.16 Check for free rotation of the HCDP pump
WARNING
Hazardous chemicals are located within the pumps and piping. Use of
suitable protective gloves and clothing along with a respirator is
recommended if contact with substances is anticipated.
If the iH has automatically shut down because of excessive HCDP pump-motor power (that
is, alarms 412 or 512 are displayed), use the following procedure to check that the pump is
free to rotate before you restart the iH system:
1. Refer to Figure 3-10. Disconnect the mating-half from the electrical supply connector (9) on
the Electrics Box.
2. Refer to Figure 1-5. Undo and remove the four screws which secure the rear cover (1), then
remove the cover.
3. Refer to Figure 6-5. Use a 100 mm A/F hexagonal key to remove the
3
/
8
BSP plug and 'O' ring
(2) from the motor shaft.
4. Fit the hexagonal key to the end of the motor shaft and try to turn the shaft clockwise (in the
direction shown by the arrow, 3):
•
If the shaft is free to turn, remove the hexagonal key and continue at Step 5.
•
If the shaft is not free to turn, contact your supplier or BOC Edwards: do not try to restart
the iH system.
5. Refit the plug and 'O' ring (2) to the motor shaft.
6. Refer to Figure 1-5. Refit the rear cover (1) and secure with the four screws.
7. Refer to Figure 3-10. Refit the mating-half to the electrical supply connector (9) on the
Electrics Box.
You can now restart the iH system: refer to Section 5.14.
6-16 iH Dry Pumping Systems
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