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EBARA Submersible Grinder Pumps
Operating, Installation, and Maintenance
Installation
(2) Cable
a) Never let the end of the cable contact water.
b) Secure the cable with vinyl strips to prevent damage.
c) Install the cable so that it will not overheat.
Overheating is caused by coiling the cable and
exposing it to direct sunlight.
(3) Grounding
As shown in Fig. 4 ground the green wire (label E).
Under no circumstances should the green wire be
connected to the power supply.
(4) Use short circuit breakers to prevent danger of elec-
trical shock.
Operation
1. Before starting the pump:
(1) After completing installation, measure the insulation resistance again as described in INSTALLATION.
(2) Check water level.
If the pump is operated continuously for an extended period of time in a dry condition or at the lowest
water level, the thermal protector will be activated.
Constant repetition of this action will shorten pump service life. Do not start the pump again in such a
situation until after the motor has completely cooled.
2. Test Operation:
!
CAUTION
Check rotation. Correct rotation is clockwise when viewed from top of motor. Pump should be started with
gate valve closed, and then the operator should open the valve gradually.
(1) Model DGFMU
a) Check the direction of rotation. If discharge volume is low or unusual sounds are heard when the
pump is operating, rotation has been reversed. When this happens, reverse two of the three wires (on
Three Phase pumps only).
b) Check amperage, voltage, and head pressure.
Maintenance and Service
!
Warning
Disconnect power cable from power source before servicing unit.
Normal maintenance should be done by qualified personnel.
Check pressure, output, voltage, current, vibration, and other specifications. Unusual readings may indicate a
problem requiring immediate service. Contact your local EBARA INTERNATIONAL CORPORATION representa-
tive as soon as possible.
1. Daily inspections:
(1) Check current and ammeter fluctuation daily. If ammeter fluctuation is great, even though within the limits
of pump rating, foreign matter may be clogging the pump. If the quantity of liquid discharged falls suddenly,
foreign matter may be blocking the grinder assembly.
EBARA Fluid Handling
www.pumpsebara.com
(t) 803 327-5005 • (f) 803 327-5097
DGUII/DGFU
8
rev. 11/05
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