3473000C
Copyright © Liberty Pumps, Inc. 2021 All rights reserved.
7 | EN
Figure 2. Wiring Diagram 3-Phase
Preparation
Always disconnect pump(s) from power source(s) before
handling or making any adjustments to either the pump(s),
the pump system, or the control panel.
Prepare Sump [Basin]
If replacing a previously installed pump, first prepare the basin by
removing the old pump and cleaning any debris from the basin.
Inspect all remaining equipment in the basin including guide rails,
piping, valves, and electrical junction boxes (if present) and repair
or replace as appropriate. Also, ensure that control hardware such
as floats or pressure transducers are clean, properly adjusted, and
in good working order.
Pump Control and Alarm Floats
The water level in the basin is determined by the placement of the
control floats and should be positioned such that the pump is
completely submerged. The minimum water depth to properly
cool the motor should be set as follows:
XLE50
7” from the bottom of the legs
XLE70
7” from the bottom of the legs
XLE100 9” from the bottom of the legs
XLE150 14” from the bottom of the legs
The upper water level should be positioned to minimize pump
starts. The alarm float should be above the turn on float switch but
below any inlets. No control should be set above the inlet to the
basin. Float switches must be unobstructed and maintain free
movement in basin.
Impeller Free Movement Check
Do not connect any power to pump until this check is complete.
Manually rotate the impeller to check that it spins freely with very
little resistance. The impeller can be rotated by reaching into the
pump intake. The pump can remain upright or can be laid down
on its side for easier access to the intake. Besides verification that
the impeller is freely spinning, rotating the impeller helps to
lubricate the shaft seals if the pump has been non-operational for
more than a week. It is recommended to rotate the impeller 5–10
full rotations.
Installation
All installation and maintenance of pumps, controls,
protection devices, and general wiring shall be done by
qualified personnel.
All electrical and safety practices shall be in accordance with
the National Electrical Code
®
, the Occupational Safety and
Health Administration, or applicable local codes and
ordinances.
Electrical Connections
With mains power disconnected, complete pump and control
wiring connections per wiring diagrams included with the control
panel and Figure 1/Figure 2 as applicable. Check all wires for
unintentional grounds after the connections are made.
Thermostat and Seal Failure Connections
Verify thermostat wires are connected in series with the contactor
and that seal fail probes are properly connected and relay
sensitivity properly adjusted. Connections are provided on the
terminal strip inside the Liberty Pumps control panel.
Seal leak relay setup: The dial should be set to 75. For best
results, turn the dial until the light turns on (around 125), then
back slowly until the light just goes out (approx. 75).
RISK OF ELECTRIC SHOCK
L3
L2
L1
BLK
PNK
VIO
RED
WHT
BLU
BRN
ORN
YEL
440–480V 3PH
L3
L2
L1
BLK
PNK
VIO
575V 3PH
BLK
PNK
VIO
RED
WHT
BLU
BRN
ORN
YEL
L3
L2
L1
208–230V 3PH
SEAL FAILURE
PROBES
MOTOR
SEAL LEAK
POWER
CORD
CONTROL
CORD
WHITE
WHITE
WHITE
WHITE
GREEN
GREEN
RED
RED
RED
RED
WHITE
WHITE
GREEN
GREEN
BL
AC
K
BL
AC
K
BL
AC
K
BL
AC
K
POTTING RESIN
L3
L2
L1
THERMOSTAT
THERMOSTAT
RISK OF ELECTRIC SHOCK
