5672000J
Copyright © Liberty Pumps, Inc. 2021 All rights reserved.
5 | EN
Pump Replacement
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.
Liberty Pumps RE/REX models come equipped with 6-pin
connectors that mate perfectly with existing control hardware. A
Liberty Pumps Adapter Harness Kit is available to convert the
RE-style connector to the REX-style connector. Kit #K001630 is
sold separately.
The following is provided for additional troubleshooting, repair, or
custom installation purposes.
Pin
Function
GP200/
GP2000
(square
connector
body)
Extreme
D-Series
(round
connector
body)
Liberty
Pumps
RE/REX
1
Manual Run
Red
Brown
Red
2
L1
Black
Red
Black
3
L2
White
Black
Yellow
4
Ground
Green
Green/Yellow
Brown
5
Alarm Feed
Orange
Yellow
Orange
6
Alarm Return
Blue
Blue
Blue
Old Pump Removal
1.
Verify mains power is OFF.
2.
Liberty Pumps recommends the use of a 30 amp circuit
breaker to prevent nuisance tripping due to spikes in amp
draw that may occur during heavy grinding events. Before
making any changes, the amperage capacity of the branch
circuit wiring and components must be verified and
upgraded as required to conform to applicable codes and
standards.
3.
Locate the riser and remove basin lid from current unit.
4.
If the basin is flooded, it should be pumped out with separate
pump or vacuum. Discharge must be disposed of in
accordance with local, state, and national codes.
5.
Disconnect the electrical quick
disconnect plug that is
hanging in the basin, if applicable.
6.
Remove bolts securing the current unit, if applicable.
7.
Close valve on current unit.
8.
Secure rope to hooks on cover. Lift the unit out of the basin.
9.
Measure the distance from the cover to the base of the
discharge elbow. Record this measurement to set the new
unit to the same distance.
RE/REX Core Replacement
1.
Apply gasket tape to the under or bottom side of the cover at
the perimeter.
2.
Adjust the discharge elbow’s height by sliding it up or down
in the discharge flange, matching that of the unit that was
removed (
Old Pump Removal, Step 9
).
Do not fully tighten the three bolts on the discharge flange
yet. The height of the discharge elbow might need to be
slightly adjusted after the unit is assembled in the pit.
Rotating cover
cam locks
Discharge elbow
Discharge flange
3.
Located on the cover are three rotating cam locks used to
secure the unit. Turn the cam locks to “OPEN” before lowering
the unit into the pit.
4.
Float switches must be positioned such that they will be free
of any objects in the tank or tank walls. If adjustments are
made to either one, make sure that floats will activate
properly.
Specifically, confirm that the alarm float activates
before hitting top cover.
5.
Lubricate the triple O-ring seal on the discharge elbow to
ease installation of elbow into receiver.
6.
Using the lifting rope, lower the grinder assembly into the
basin. Align the cover tabs to the mating tank slots, and
discharge elbow to the receiver/ball valve. The unit should
come to rest squarely on the tank flange.
7.
The three cam locks for the cover should now be secured by
rotating the 3/8” hex bolts (9/16 socket) clockwise to the
“CLOSED” position. The cam locks will wedge under the tank
flange, securing the cover.
8.
Press downward on the discharge elbow such that it seats
fully in the ball valve’s receiver. Tighten the three 3/8” bolts
RISK OF ELECTRIC SHOCK
