Cautions For Operation; Operation; Cautions During Operation - EBARA DL3FU Operating Instructions, Installation & Maintenance Manual

EBARA Submersible Sewage Pumps
DL3FU / DL3MFU / DL3KFU / DL3KMFU / DDL3FU / DV3FU/ DML3FU
Operating, Installation, and Maintenance
INSTRUCTION MANUAL

5.3 Cautions for Operation

Closed valve operation is not problematic to the pump if it is not operated for a prolonged period
of time. Otherwise, the pump will overheat, or rattle, or vibrate. This can result from backward
flow at the suction port.
Avoid closed valve operation as much as circumstances allow.

5.4 Operation

(1) Starting
・Open the valve if provided.
・Start motor
Note: A pump of lower shut off power than rated horsepower may be started with the valve
closed.
In such case, open the valve within 1 minute after motor start.
CAUTION: DO NOT RUN THE MOTOR IF REVERSE FLOW OCCURS.
!
(2) Stopping
・Stop motor (Turn off power)
Note: A pump of lower shut off power than rated horsepower may be stopped after the valve
is closed.

5.5 Cautions During Operation

Pay attention to abnormal noise and vibration. If air or foreign matter enters the pump or if there
is a change in the operating point, mis-operation or valve defect in the discharge lines,
abnormal noise and vibration can occur. Pump discharge pressure can also vary greatly, or
the current meter of the motor can vary suddenly during operation.
In such cases, immediately check to find the cause of these problems.
EBARA
PUMPS AMERICAS CORPORATION
PM32U
www.pumpsebara.com
(t) 803.327.5005 (f) 803.327.5097
P.19
20
rev. 01/21