GORMAN-RUPP PUMPS SBM-00192, Инструкция по установке, эксплуатации и обслуживанию

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OM-05724 JD Series
PAGE C - 3
OPERATION
Suspend the pump by the lifting handle. Apply
power
briefly and note the direction of pump twist.
As viewed from the top, the pump should twist in a
counterclockwise direction; this will indicate that
impeller rotation is correct.
If the pump twists in a clockwise direction, impeller
rotation is incorrect. Have qualified personnel inter­
change the control box connections of any two
pump motor power leads. Recheck pump twist; it
should now be in a counterclockwise direction.
STARTING, STOPPING, AND OPERATIONAL
CHECKS
Starting
Do not attempt to operate the pump until
impeller rotation has been checked; other­
wise, the pump will be damaged.
Follow the control box manufacturer's instructions,
start the pump, and run any recommended
checks.
Stopping
Follow the control box manufacturer's instructions
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 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 in com­
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.
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 wet well,
disconnect power , and
clear manually.
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 on the Pump Performance
Curve.
Check the pump for overheating. Overheating can
occur if the pump is misapplied, required to start
repeatedly, if the control box fails to provide over­
load or thermal protection, or if the pump is oper­