EBARA GS - Electrical Maintenance; Pump Operation and Maintenance; Operation Preparation

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5. Electrical maintenance
Any work on the motor must be carried out with the appliance switched off and after disconnecting the
mains power supply.
- Check on a regular basis that the requirements regarding installation and electrical connections are
complied with.
- Comply with the lubrication schedule for the bearings and the type of grease (if it is specified on the motor
nameplate). Nevertheless, we recommend that bearings are replaced after three years.
6
Operation
Warning
Do not operate the pump for more than 1 minute with the
discharge valve closed. Doing so will increase the inner
pressure of the pump, damaging the casing or plugs.
Do not touch the rotating parts such as the shaft, etc. while the
pump is running. Since these parts rotate at high speed, doing
so could result in injury.
Caution
If the pumped liquid is hot water, keep your hands off the
pump. The pump’s surfaces will be hot, and you could get
burned if you touch them.
Do not touch the motor. The motor’s surfaces will be hot, and
you could get burned if you touch them.
Do not cover the motor with a blanket or cloth. Doing so could
over heat the motor, setting a fire.
1. Preparation for operation
Note
After piping or Water filling, check the centering of pump again please.
(1) Do pipe flashing before operation. Without pipe flashing, there might be some abnormal wear
occurring on mechanical seal or other rotating parts.
(2) Try to turn the shaft, to check that it rotates easily. If it turns stiffly or irregularly, inspect internal rusts,
etc.
(3) Prime the pump. Operating the pump without priming it will cause damage. Open the suction valve,
discharge valve, and air vent valve, and fill the pump to the discharge nozzle with water from the pipe
line.
(4) When priming, rotate the pump manually to completely remove air from inside the impeller.
(5) Tightening nuts of gland bolts to the extent to which hand-cranked becomes heavy. Make sure that
there is no uneven tightening happening when tightening nuts of gland bolts. Do adjustment of gland
packing according to “Adjustment of gland packing” (P.15).
Note
Do not make the water leakage value of gland packing to 0 mL/min.
(Refer to P.15 - Table 2)