Gorman-Rupp Pumps SFV4A-X 1531245 and up - Manual (Page 17)

SFV SERIES X‐PROOF PUMPS OM-06628
PAGE C - 2 OPERATION
Do not start the pump more than 10 times
per hour. If the motor does not cool be­
tween starts it will overheat, resulting in
damage to the motor windings or control
box components.
When installed in a standard alternating duplex
application, where one pump runs while the other
is shut down, the pump may be operated continu­
ously until fully exposed. The shut down cycle will
provide sufficient time for the motor to cool.
STARTING, STOPPING, AND
OPERATIONAL CHECKS
Starting
Do not attempt to operate the pump until
impeller rotation has been checked; im­
proper rotation will affect pump perform­
ance and may damage the pump.
Follow the instructions accompanying the control
box, start the pump, and run any recommended
checks.
Stopping
Follow the instructions accompanying the control
box for stopping the pump.
The integral thermal overload device
will shut off the motor if the temperature
rises above design limits. When the
pump cools and the temperature falls
below these limits, the motor will restart
automatically. To avoid the hazards of
an unexpected motor start‐up, do not at­
tempt to handle or service the pump un­
less all power to the motor has been
shut off and locked out at the control
box; otherwise, serious personal injury
could result.
During motor shutoff by the thermal
overload device, control box circuits re­
main live. Do not attempt to service any
control box components unless incom­
ing power has been shut off.
After stopping the pump, be sure to perform all re­
quired maintenance and preservation procedures.
Operational Checks
To detect minor problems, check the pump for
proper operation when it is first started, and at peri­
odic intervals during operation.
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
Section D.
The suction inlet or impeller may become clogged
with debris. In some cases, stopping the pump
momentarily may backflush this blockage. If back­
flushing does not clear the debris, remove the
pump from the sump or wet well and clear manu­
ally.
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