©Copyright 2013 Liberty Pumps Inc. All rights reserved
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STEPS TO BE TAKEN BEFORE ENERGIZING
1. Retighten all field-made connections. Retighten all factory-made connections. These may have loosened
due to shipping and handling vibrations.
2. Check the security of mounting hardware.
3. Check the enclosure to see that it has not been damaged in such a manner as to reduce electrical spacing.
4. Rotate the cutter wheel with the hex socket head cap screw to verify movement and lubricate the seals.
5. Ensure that no wires or other obstacles are in the way of the pump cutter.
6. MOTOR OVERLOAD PROTECTION: The pump motor is protected from locked rotor and running overloads
by a thermal overload integrally mounted to the motor. No adjustments are required.
7. Check to determine that all grounding connections are made properly
If a panel is used, remove all debris, scrap wire, etc., from the control panel interior before closing the
doors. Install covers, close doors making certain that no wires are pinched and that all enclosure parts
are properly aligned and tightened.
ENERGIZING THE CONTROL PANEL OR BREAKER FOR THE FIRST TIME IS
POTENTIALLY DANGEROUS. LICENSED ELECTRICAL PERSONNEL SHOULD BE
PRESENT WHEN THE PANEL OR BREAKER IS ENERGIZED FOR THE FIRST TIME. IF
FAULTS CAUSED BY DAMAGE OR POOR INSTALLATION PRACTICES HAVE NOT BEEN
DETECTED, SERIOUS DAMAGE CAN RESULT WHEN POWER IS APPLIED
(REFER TO
SECTION 5).
FLOAT SWITCHES
1. The pump's on and off cycles are normally controlled by a "piggy back" float switch attached to the side of the
pump, or by hanging switches in the wet well. Refer to panel or switch instructions for proper electrical
connection
FLOAT SEQUENCE- PIGGY BACK SWITCH
(AUTOMATIC MODELS)
1. As the liquid level in the wet well rises, the float tilts, closing the switch. This starts the pump.
2. The pump runs until the liquid level falls to the “PUMP OFF” level of the float (Factory set - 6" minimum).
FLOAT SEQUENCE- SIMPLEX CONTROL PANEL (MANUAL MODELS)
1. As the liquid level in the wet well rises, the “PUMP OFF” float tilts, closing the switch (This level must be set at
a minimum of 6"). As the liquid level continues to rise, the “PUMP ON” float tilts. This switch closes, starting
the pump.
2. The pump runs until the liquid level falls below the “PUMP OFF” float, emptying the wet well.
3. In the event of a malfunctioning float switch, control relay or pump, the liquid level rises and tilts the “HIGH
LEVEL ALARM” float. The alarm system will activate.
FLOAT SEQUENCE-DUPLEX CONTROL PANEL (MANUAL MODELS)
1. As the liquid level in the wet well rises, the “PUMP OFF” tilts, closing the switch. As the liquid level continues
to rise, the “LEAD PUMP ON” float tilts. This switch closes, starting the lead pump. The pump runs until the
liquid level falls below the “PUMP OFF” float (6” minimum), emptying the wet well.
2. On the next rise of the liquid level, the other pump will start on the “LEAD PUMP ON” signal. The pumps will
continue to alternate their cycles.
NOTE:
The ON/OFF float switch differential should be set as to not exceed 12 starts per hour.
3. If the liquid level rises to the “LAG PUMP ON" float, the second pump will start. Both pumps will run until the
liquid falls below the “PUMP OFF” float, emptying the wet well.
4. In the event of a malfunctioning float switch, control relay or pump, the liquid level rises and tilts the “HIGH
LEVEL ALARM” float. The alarm system will activate.
