Gorman-Rupp Pumps SE2C3 115V 1P 1483930 and up - Manual (Page 17)

OM−06492 SE SERIES
PAGE C − 4 OPERATION
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.
LIQUID LEVEL
Overheating will occur if the liquid falls be-
low the level required to cool the pump mo-
tor.
The pump will operate fully or partially submerged.
However, since the motor is cooled by the liquid
being pumped, overheating will occur if the liquid
is pumped below the required to cool the motor.
Models operated manually or with an optional liq-
uid level device must remain sufficiently sub-
merged. Do not allow the liquid level to fall below
the top of the barbed discharge adaptor in order to
provide sufficient cooling to the motor.
COLD WEATHER PRESERVATION
Do not attempt to thaw the pump by us-
ing a torch or other source of flame. This
could damage gaskets, O-rings or heat
the oil in the seal housing above critical
temperatures, causing the pump to rup-
ture or explode.
The pump will not freeze as long as the casing is
submerged in liquid. If the casing is not sub-
merged, or if the liquid begins to freeze, remove the
pump from the sump or wet well and dry it thor-
oughly. Run the pump for two or three minutes to
dry the inner walls.
If the pump does freeze while it is out of the liquid,
submerge it until thawed; if the liquid is near freez-
ing, the pump must be submerged for an extended
period of time. Check thawing by starting the pump
and checking that the shaft rotates freely. If the
pump remains frozen, allow additional thawing
time before attempting to restart.
If submerging does not thaw the pump, move it
into a warm area until completely thawed.
LUBRICATION
Do not remove plates, covers, gauges,
pipe plugs or fittings from an over-
heated pump. Vapor pressure within the
pump can cause parts being disen-
gaged to be ejected with great force. Al-
low the pump to completely cool before
servicing.
On a new pump, check the oil level in the seal cav-
ity before initial startup. Drain and replace the oil af-
ter the first 200 hours of operation. Following this,
check the oil level in the seal cavity after the first two
weeks of operation, and every month thereafter.