Maintenance And Inspection; Internal Energies; Power Source; Cooling Water - EBARA ESA25-D Instruction Manual

P.52

8. Maintenance and Inspection

8.1 Internal energies

Following items show internal energies that shall be considered before start
service maintenance.

8.1.1 Power source

This pump is supplied with AC200V/AC400V/AC460V power source.
from the pump, the accessory power source locating in the vicinity of the power
connectors are supplied with voltage even when the pump is completely stopped.
To conduct pump maintenance or service, be sure to keep the power supply to
the pump turned off and lock-outed and then unplug the power cable.

8.1.2 Cooling water

This pump is supplied with cooling water at pressure of maximum 0.4 MPa.
Disconnection of the cooling water resulted from improper handling may cause
electrification and unit damage.
cooling water connection plugs on the inlet and outlet, and seal off with plastic
cap. The self-sealing plug is used for the cooling water connection plug in these
pumps.

8.1.3 Nitrogen gas

This pump is supplied with nitrogen gas at pressure of maximum 0.7 MPa for
diluting and sealing inside the pump. For service and transportation, close the
supply-source valve to reduce the pressure with the regulator and detach the gas
connection. Close nitrogen port with blank off plug. If the pump has already
operated with process gases, purge the residual gases with nitrogen gas after
stopping the pump operation. Then, conduct maintenance.
PM10U
For service and transportation, unplug the
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