6 | EN
Copyright © Liberty Pumps, Inc. 2020 All rights reserved.
6850000C
Seal Failure Probes
XLSG/XLSGX-Series grinder pumps are equipped with two
mechanical face seals with an intermediate oil chamber between
them. This ensures lubrication for the seals, shaft flame path, and
as a barrier to the motor chamber in the event the lower seal is
compromised. A seal fail or moisture sensing device is located in
the mid oil chamber and continuously monitors for leakage. In the
event of a seal failure, moisture mixes with the oil, tripping the
seal leak circuit. In a failure condition, a fault light will illuminate
on the control panel. The pump will continue to operate, but
service should be scheduled as soon as possible.
Intrinsically safe (ISS and ISD) control panels by Liberty Pumps
have a seal leak test button that tests the integrity of the seal leak
circuit continuity. When pressed, the light should illuminate. The
light should go off when the test button is released. If it remains
on, the potentiometer is set too high. If light does not illuminate,
the light is burned out, the circuitry is open, or the system does
not have power. The seal leak relay requires adjustment upon
installation. See
Seal leak relay setup
Power and Control Cords
Do not remove cord and strain relief, and do not connect
conduit to pump.
The power and control cords cannot be spliced; a junction box
may be used providing it is rated for hazardous locations and has
approved cord connectors.
IMPORTANT:
Each cord has a green lead. This is the ground wire
and must be grounded properly per NEC
®
and/or local codes.
Wiring Instructions
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.
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.
Figure 1. Wiring Diagram 1-Phase
Figure 2. Wiring Diagram 3-Phase
RISK OF ELECTRIC SHOCK
RISK OF ELECTRIC SHOCK
WHITE
WHITE
GREEN
BLACK
GREEN
GREEN
BLACK
GREEN
NOT
USED
*
NOT
USED
*
* Note:
On
1-phase
pumps, the
white and red
leads of the
control cord
are not used.
SEAL
LEAK
BLACK
WHITE
RED
MOTOR
BLACK
WHITE
RED
RED
WHITE
GREEN
BLACK
L2/N
L1
RUN
CAP
START
CAP
POTTING
RESIN
SEAL
FAILURE
PROBES
START
RELAY
5 2
1
CONTROL
CORD
POWER
CORD
START CIRCUIT
START CIRCUIT
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
A
C
K
BL
A
C
K
BL
A
C
K
BL
A
C
K
POTTING
RESIN
L3
L2
L1
THERMOSTAT
THERMOSTAT
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
208V/230V 3PH
