Install Instructions

Single phase duplex panels are designed to oper-
ate with three or four floats for pump sequencing.
The standard float functions are common pump
stop, lead pump start, lag pump start/alarm (three
floats), or separate lag and alarm floats (four floats).
Three Float Operation: As the liquid level rises to
the stop float and tips it to the ON (closed) position,
the panel will remain inactive. As the liquid level tips
the lead float, the lead pump will start. If the liquid
level tips the lag/alarm float, the lag pump will start
and the audio/visual alarm will activate. Both pumps
and the alarm will remain active until the liquid level
drops and the lag float is in the OFF (open) posi-
tion. At this time the alarm will silence. Both pumps
will remain on until the liquid level drops to normal
and all three floats are in the OFF (open) position.
When both pumps have stopped running, the alter-
nator will switch the lead pump and lag pump oper-
ating functions in the next sequence.
Four Float Operation: The alarm will activate and
remain on only if the alarm float is tipped to the ON
(closed) position.
Alarm System (Horn and Indicator -
standard)
When an alarm condition occurs, a red light and a
horn will be activated. If the test/normal/silence
switch is moved to the silence position, the horn
will be silenced. When the alarm condition is
cleared, the alarm system is reset. The alarm sys-
tem can be tested by moving the test/normal/si-
lence switch to the test position.
HOA Switch
A hand-off-automatic switch is provided for each
pump. In the hand mode, the pump will turn on un-
less other safety features are employed. In the au-
tomatic mode, the pump will turn on from com-
mands by the float switch(es).
Pump Run Lights
The run light will be ON in either the hand or the
automatic mode when the pump is called to run.
Control and Alarm Fusing
The control circuit and alarm circuit are fused sepa-
rately.
Operations
Control and Alarm Lights
Lights will illuminate when control/alarm power is
supplied.
Float Status Lights
Lights will illuminate when the respective float is in
the closed position.
Circuit Breaker (optional)
The pump circuit has a thermal-magnetic circuit
breaker which provides pump disconnect and
branch circuit protection.
Dry Auxiliary Contacts
(standard feature)
Normally open - Contacts are open under normal
conditions and closed when alarm condition is
present.
Normally closed - Contacts are closed under nor-
mal conditions and open when alarm condition is
present. Both types automatically reset once alarm
condition is cleared.
NOTE: Some options ordered may not be included
in this manual. Certain options will require alterna-
tive circuitry not including float status and control/
alarm indicators.
For information regarding the operations
of options not listed here or servicing
questions, please call a Liberty Pumps
customer service technician at
1-800-543-2550
Warranty void if panel is modified.
7249000A
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