Preparation; Installation - Liberty Pumps LSG200 Serie Manual De Instalación

Preparation

RISK OF ELECTRIC SHOCK
 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, 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. Ensure that control hardware such as
floats or pressure transducers are clean, properly adjusted, and in
good working order.
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.
Pump Control and Alarm Floats
The engineering drawings will generally specify the levels for
Pump ON, Pump OFF, and High Level alarm. If they are not
specified, the guidelines in Table 2 should be used to determine
float switch locations. The upper water level should be positioned
to minimize pump starts. The High Level alarm float must be
above the Pump ON float but below any inlets. No float should be
set above the inlet to the basin.
Table 2. Float Switch Installation Guidelines
System
Pump OFF
Piggyback Switch
(1-Float System)
Pump ON
Pump OFF
Simplex Pump
Pump ON
Station
(3-Float System)
High Level
Pump OFF
Lead Pump ON
Duplex Pump
Station
Lag Pump ON
(4-Float System)
High Level
5647000K
Alarm Levels
Factory set at float
tether 4 in.
Factory set at float
tether 4 in.
Level to top of motor
housing.
Minimum 1-1/2 ft
above PUMP OFF level.
Minimum 1 ft above
PUMP ON level and
below inlet pipe.
Level to top of motor
housing.
Minimum 1-1/2 ft
above PUMP OFF level.
Minimum 1 ft above
LEAD PUMP ON level.
Minimum 1 ft above
LAG PUMP ON level
and below inlet pipe.
Copyright © Liberty Pumps, Inc. 2019 All rights reserved.
Cutter and Impeller Free Movement Check
 Wear Personal Protective Equipment as exposed bottom has
sharp edges.
Do not connect any power to pump until this check is complete.
Manually rotate the cutter to check that it spins freely with very
little resistance. The cutter is located on the bottom of the pump.
The cutter can be carefully rotated by hand, or rotated by
inserting a tool into the cutter bolt. If rotating by hand, wear
protective gloves as the cutter and cutter plate have sharp edges.
The pump can remain upright or can be laid down on its side for
easier access to the cutter. Besides verification that the cutter and
impeller are freely spinning, rotating the cutter helps to lubricate
the shaft seals if the pump has been non-operational for more
than a week. It is recommended to rotate the cutter 5–10 full
rotations.

Installation

RISK OF ELECTRIC SHOCK
 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
Health Administration, or applicable local codes and
ordinances.
Electrical Connections
With main power disconnected, complete pump and control
wiring connections per manufacturer's wiring diagrams included
with the control panel and Figure 1 (external capacitor models)/
Figure 2 (3-phase models) as applicable. All wires should be
checked for unintentional grounds with an ohmmeter or Megger
device after the connections are made.
3-Phase Pump Rotation Verification
 Check 3-phase pumps for correct rotation prior to installing
pump(s) in basin. To change rotation, reverse any two of the
three power leads to the pump (not the ground). Code the
wires for reconnection after installation.
3-phase power uses three separate
alternating currents that peak at different
integrals. With pumps that are powered
by three phase electric, the phase
sequence of the motor must match the
phase sequence of the power source.
When the phase sequences match, the
pump operates properly. However, when
the phases are out of order, the pump
runs backward (i.e., the impeller rotates
in the wrong direction). This causes an
extreme loss of performance and could raise the current draw,
which could result in tripping an overload or circuit breaker.
®
, the Occupational Safety and
Correct Impeller Rotation
TOP VIEW
ROTATION KICKBACK
®
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