Liberty Pumps 2460-Series - Manual (Page 3)

©Copyright 2012 Liberty Pumps Inc. All rights reserved 3
3
Installation Instructions
1. Excavation: E xcavate the hole for the basin as small as possible, with a minimum base diameter of 38”. Never place the basin in
direct contact with rocks or other sharp objects. Place enough fine, 1/8" to 3/4" pea gravel or 1/8" to 1/2" washed, crushed stone at
the bottom of the excavation to create a minimum of 12 inches stone or gravel after compaction. Do not use sand or native soil as
backfill*. Properly compact underneath the basin to provide a solid, level base that can support the weight of the filled basin. If a
concrete pad will be used under the basin, the compacted stone sub-base can be reduced to 6 inches.
2. Connections & Backfill: Pour enough concrete over and around the anti-floatation flange to anchor the basin and prevent
upward movement. Connect 1¼” schedule 80 PVC pipe to the pump discharge. Do not reduce the size of the discharge piping,
and do not increase the discharge piping to larger than 2”. The remainder of the discharge line should be as short as possible with
a minimum number of turns. Connect the inlet line
to the 4” fibergass inlet hub with a rubber donut (Liberty #6112000). Connect
the electrical coupling to 2 ” electrical conduit and run the power and float cords through the conduit to the control panel. The
remaining backfill should be only fine, 1/8" to 3/4" pea gravel or 1/8" to 1/2" washed, crushed stone. Do not use sand or native soil
as backfill*. Do Not exert heavy pressure or run heavy equipment over the backfill material, as it may cause tank collapse.
*Other backfill options may be available – consult the factory for special instructions relative to your situation.
3. Venting: The fiberglass basin provided with the system
must be completely sealed and properly vented in order to
meet health and plumbing code requirements. The system
is designed to be vented through the inlet to an existing
building vent stack. In order to accomplish this, there must
be no traps between the system inlet and the nearest
building vent stack connection. See Figure A for an
example. If this is not possible or desirable in your
application, a vent flange or grommet can be installed in a
hole cut into the solid fiberglass cover.
4. Control Panel:
Risk of Electric shock: This pump is
supplied with a grounding conductor. To reduce the risk of
electric shock, be certain that it is connected only to a
properly grounded earth wire. All electrical circuitry should
be installed in accordance with the National Electric Code
(NEC) and all applicable local codes or ordinances.
The control panel that is an integral part
of this complete unit is supplied with its own separate
Installation/Operation/Maintenance manual. Ensure that
you have received this manual, and that you read and
understand it prior to installing this unit. Your familiarity with
the control panel manual is critical.
Per UPC code, a separate 115V branch circuit should be
installed for the alarm circuit. We do not recommend
splitting the incoming pump power circuit to power the
control circuit.
Connect the grinder pump leads and the float switch leads
to the control panel in accordance with the instructions
included with those units.
5. Float Switches:
The float switches are pre-mounted on a quick tree. For
quick tree removal, loosen the cord nut, locking clamp, and
pull the tree straight out of the tank. The pump cycle is pre-
set at the factory at 14
” for 2460LSG (approximately 28
gallons), 18 ” for 2472LSG (approximately 35 gallons) and
20” for 2484LSG (approximately 39 gallons). The pump
cycle can be adjusted by loosening the cord clamp and
moving the “on” float up or down. We do not recommend
adjustments of more than 3” in either direction – please call
the factory if you need to adjust the pump cycle beyond this
recommended level.
6. Testing and Startup: Follow the testing and startup
procedures found in the LSG / LSGX Series and control
panel manuals.
Figure A – Inlet Venting
2460LSG
OR