Electrical Maintenance; Operation; Before Starting The Pump - EBARA GS Instruction And Maintenance Manual

Instruction and Maintenance Manual
- Make the connections, as required, in line with the figures:
a) Direct start up (up to 5.5 kW)
Three-phase motor (230/400 v and 400/690V)
L1' L1'
b) Star-Delta Starter
(Recommended from 5.5 kW)
Three-phase motor
L1 L1

6.6.2 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.

7. OPERATION

7.1 BEFORE STARTING THE PUMP

1. Make sure that the pipes are flushed after the installation is completed, since any
impurities may lead to faults, noise and excess wear around the mechanical closure
and the other parts of the pump.
2. Check that the pump turns easily by spinning the shaft with your hand. If the move-
ment is stiff or irregular, check the pump because the mechanical closure may be
damaged, the gasket too tight or there might even be rust inside the pump.
3. Check the operating details of the motor, which are listed on the nameplate.
4. Do not operate the pump without draining it previously. If the system is in suction
mode, the pump and the suction pipe must be filled with water via the relevant de-
vice duly installed on the delivery pipe. If the suction is primed, the pump must be
filled with water by opening the suction and delivery valves. Make sure that no air
L2' L2' L3' L3'
W2 W2 U2 U2 V2 V2
U1 U1 V1 V1 W1 W1
L2 L2 L3 L3
L1' L1' L2' L2' L3' L3'
W2 W2 U2 U2 V2 V2
U1 U1 V1 V1 W1 W1
L1 L1 L2 L2 L3 L3
Lower voltage
(Connection to Delta)
L1' L2' L3'
W2 U2 V2
U1 V1 W1
L1 L2 L3
W2 W2 U2 U2 V2 V2
U1 U1 V1 V1 W1 W1
L1 L1 L2 L2 L3 L3
Higher voltage
(Connection to Star)
13
EN