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MY12715 (07-15-22)
GENERAL INFORMATION
OVERLOAD HEATERS
If the electrical panel is not used, starters with 3 leg overload
relay must be supplied on 3 phase pumps. Each leg is to have an
identical heater sized in accordance with the nameplate amps on
the motor housing. The amp draw on these submersible motors is
slightly higher than a corresponding horsepower surface motor,
so heaters must be sized by the nameplate rating.
INSTALLING SUMP LEVEL CONTROLS FLOAT CONTROLS
In all systems, the lower or turn-off control is to be set to
maintain a minimum level in the sump. This level shall be no
more than 3-1/4" from the top of the motor housing down to the
surface of the sewage.
The second or turn-on control is set above the lower turn-off
control. The exact distance between the two floats must be a
compromise between a frequent pumping cycle (15 starts per hour
max.) to control septicity, solids and a slower cycle for energy
economy. This distance should be determined by the engineer or
consulting engineer, depending on the conditions of
the application.
INSTALLING PUMP IN SUMP
HAZARDOUS VOLTAGE.
Can shock, burn, or kill.
When installing, operating, or servicing this pump, carefully
follow the safety instructions listed herein.
RISK OF FIRE OR EXPLOSION.
Do not smoke or
use open flames in or around this system. Only the FM listed
products are to be used in a hazardous location applications per
NFPA 70 National Electric Code. Do not pump flammable liquids.
Do not use non-hazardous pumps in explosive environments.
Before installing the pump in the sump, lay it on its side and rotate
impeller. Impeller may be slightly stuck due to factory test water.
The impeller should turn freely.
DO NOT
connect the power until
after this test.
Clean all debris from sump and connect pump to piping. A check
valve must be installed on each pump and a gate or plug valve
in each pump discharge is highly recommended. This valve
should be installed on the discharge side of the check valve so
if it becomes necessary to service the check valve, the line
pressure can be cut off. Single pump systems are sometimes
installed without a check valve where it is desirable to self-drain
the discharge line to prevent freezing. This can be done only with
short discharge lines; otherwise water will return to the sump and
cause short cycling of the pump.