6 | EN
Copyright © Liberty Pumps, Inc. 2020 All rights reserved.
2399000D
Float Sequence: Piggyback (Automatic Models)
1.
As the liquid level in the basin rises, the float tilts, closing the
switch. This starts the pump.
2.
The pump runs until the liquid level falls below the Pump OFF
level of the float (factory set at 6”), emptying the basin.
Float Sequence: Simplex (Manual Models)
1.
As the liquid level in the basin rises, the Pump OFF float tilts,
closing the switch. This level must be set at a minimum of 6”.
As the liquid level continues to rise, the Pump ON float tilts.
This switch closes, starting the pump.
2.
The pump runs until the liquid level falls below the Pump OFF
float, emptying the basin.
3.
In the event of a malfunctioning float switch, control relay, or
pump, the liquid level rises and tilts the High Level Alarm
float. The alarm system will activate.
Float Sequence: Duplex (Manual Models)
1.
As the liquid level in the basin rises, the Pump OFF float tilts,
closing the switch. As the liquid level continues to rise, the
Lead Pump ON float tilts. This switch closes, starting the lead
pump.
2.
The pump runs until the liquid level falls below the Pump OFF
float, emptying the basin.
3.
On the next rise of the liquid level, the other pump will start
on the Lead Pump ON signal. The pumps will continue to
alternate their cycles.
Note:
The ON/OFF float switch
differential should be set as to not exceed 12 starts per hour.
4.
If the liquid level rises to the Lag Pump ON float, the second
pump will start. Both pumps will run until the liquid falls
below the Pump OFF float, emptying the basin.
5.
In the event of a malfunctioning float switch, control relay, or
pump, the liquid level rises and tilts the High Level Alarm
float. The alarm system will activate.
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.
The basin required for effluent and sewage applications must be
sealed and vented to meet health and plumbing code
requirements. The diameter should be a
minimum
of 18” and the
depth a
minimum
of 24”. A larger basin may be required
depending on local codes and the number of fixture units
entering the system.
Pump installation should be at a sufficient depth to ensure that all
plumbing is below the frost line. If this is not feasible, remove the
check valve and size the basin and/or adjust pump differential to
accommodate the additional backflow volume. Consult Liberty
Pumps for details on how this should be done.
Prepare Existing Sump [Basin]
If replacing a previously installed pump
, prepare the basin by
removing the old pump and cleaning any debris from the basin.
Inspect all remaining equipment in the basin including piping,
valves, and electrical junction boxes (if present) and repair or
replace as appropriate.
Prepare New Sump [Basin]
Excavation
Locate all overhead and underground utilities before
excavating.
Excavate the hole as small as possible, with a minimum
recommended 8” diametrical clearance around the tank. Never
place the basin directly in contact with rocks or other sharp
objects. Place only fine, 1/8” to 3/4” pea gravel or 1/8” to 1/2”
washed, crushed stone as bedding between the basin and the
hole walls. 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.
Inlet Connection & Initial Backfill
Use only fine, 1/8” to 3/4” pea gravel or 1/8” to 1/2” washed,
crushed stone around the bottom of the basin to hold it in place.
Do not use sand or native soil as backfill.
Make the inlet connection as required per basin.
Liberty Pumps P370 and P380-Series Basins
have a 4” inlet
molded to the side of the tank. This inlet is sized to accept a 4”
no-hub type coupling. Connect the gravity drainage line from the
fixtures to this hub.
Other Liberty Pumps basins
provide a 4” caulking hub or pipe
grommet inlet. Hubs utilize caulking material or rubber donuts;
grommets are a simple slip-fit. Connect the gravity drainage line
from the fixtures to this opening. Other inlet sizes are available,
consult factory.
Final Backfill
Keep large rocks, clods, and foreign objects out of the backfill
material. Only fine, 1/4” to 3/4” pea gravel, or 1/8” to 1/2” washed,
crushed stone is recommended. Do not use sand or native soil as
backfill. Mound the backfill slightly and allow for natural settling.
Provide access to the basin cover for maintenance and service.
Compaction of backfill materials must be adequate to ensure the
support of the tank, and to prevent movement or settlement.
Note:
Do not exert heavy pressure or run heavy equipment on the
backfill material as this could cause the tank to collapse.
RISK OF ELECTRIC SHOCK
RISK OF SERIOUS INJURY OR DEATH
