Gorman-Rupp Pumps SM4G1-X30 460/3 1002211 thru 1241783 - Manual (Page 24)

SM SERIES OM−04417
OPERATION PAGE C − 4
hour. If the pump motor does not cool be-
tween starts, it will over-heat, possibly re-
sulting in damage to the motor windings.
Move the control handle to the ON position. The
pump motor will start running, and pumping
should begin. Since the pump is submerged, prim-
ing is not required.
Stopping
To stop the pump, turn the control handle OFF,
thereby opening the circuit breaker.
This does not terminate incoming power through
the field wiring connected to the control box.
After stopping the pump, be sure to perform all re-
quired maintenance and preservation procedures.
NOTE
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 it is 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
troubleshooting chart for possible causes.
To avoid serious damage to the pump,
check for unusual noises or excessive vi-
bration while the pump is running. If noise
or vibration is excessive, stop operation
and refer to the troubleshooting chart in the
maintenance and repair manual.
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 END DISASSEMBLY in Section
E).
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. The pump could
overheat if operated against a closed discharge
valve, or if subjected to repeated start cycles.
COLD WEATHER PRESERVATION
The pump will not freeze as long as it is submerged
in liquid. If the pump casing is not submerged, or if
the liquid begins to freeze, remove the pump from
the sump or wet well and allow it to dry thoroughly.
Run the pump for two or three minutes to dry the
inner walls.
If the pump freezes, move it into a warm area until
completely thawed, or submerge it into the liquid. If
the liquid is near freezing, the pump must be sub-
merged for an extended period of time. Start the
pump and check for shaft rotation. if still frozen, al-
low additional thawing time before attempting to
restart.
Do not attempt to thaw the pump by us-
ing a torch or other source of flame. This
could damage gaskets or heat the oil
within the pump above the critical point
and cause the pump to rupture or ex-
plode.