Gorman-Rupp Pumps SE2D3A 115V 1P 1483930 and up - Manual (Page 15)

SE SERIES OM-06495
PAGE C - 3 OPERATION
DIRECTION OF
KICKBACK
AT STARTUP
Figure C‐1. Checking Pump Rotation
STARTING, STOPPING, AND
OPERATIONAL CHECKS
Starting And Stopping
Pump operation is controlled by the built‐in liquid
sensing devices. When liquid level reaches the on‐
point (upper) device, the pump will switch on and
continue to run until liquid level falls below the off‐
point (lower) device.
NOTE
Distilled water or uncontaminated rain water may
fail to provide conductivity necessary to trigger the
automatic liquid level sensing devices built into the
pump. If this occurs, ground the on‐point assembly
to convert the pump to manual operation, and
install a float level control system.
It is recommended that a check valve or throttling
valve be installed in the discharge line if there is any
possibility of siphoning or back flow when the
pump is shut off.
Operational Checks
Check the pump for proper operation when first
started and periodically thereafter to identify minor
problems.
Check the pump for unusual noises or excessive
vibration while it is operating. If noise or vibration
is excessive, stop the pump and refer to the trou­
bleshooting chart for possible causes.
Check the pump strainer screen for clogging
caused by stones, sticks, or other debris. Clean
the strainer screen when required. In some cases,
stopping the pump momentarily may back flush
the strainer screen, purging most of the debris
from it. If this fails to clean the screen, remove the
pump from the sump and remove the debris manu­
ally. See PUMP DISASSEMBLY in the Mainte­
nance And Repair manual.
Never introduce air or steam pressure
into the pump casing to remove a block­
age. This could result in personal injury
or damage to the equipment. If back­
flushing is absolutely necessary, limit
liquid pressure input to 50% of the maxi­
mum permissible operating pressure
shown in the pump performance curve
(refer to the accompanying Parts List
Manual).
Check the pump for overheating. Overheating can
occur if the pump is made to start and stop repeat­
edly without time to cool off between starts, the liq­
uid level is allowed to fall too low to sufficiently cool
the motor, or if the circuit breaker or fuse fails to
provide adequate protection. Operating the pump
against a closed discharge valve for an extended
period will also cause the pump to overheat.
Check the oil level(s) as indicated in the following
LUBRICATION section.