10 | EN
Copyright © Liberty Pumps, Inc. 2022 All rights reserved.
7550000G
Thermostat and Seal Failure Connections
Verify thermostat wires are connected in series with the contactor,
seal fail probes are properly connected, and relay sensitivity
properly adjusted. Connections are provided on the terminal strip
inside the Liberty Pumps control panel.
Seal leak relay setup:
Turn the dial completely up, connect the
leads from the pump, then push the test button. The light should
turn on. While still depressing the button, turn the dial down until
the light turns off, then turn the dial up until the light turns back
on. For best results, the potentiometer dial should be around 160.
If the pump is connected directly to a seal leak relay in the panel
(no test button), the dial should be set to around 75. Turn the
potentiometer dial clockwise until the red light turns on, then turn
the dial counterclockwise until the red light turns off. The tick
marks on the seal leak relay are for reference only.
Guide Rail System
If guide rails are used, refer to the separate installation
instructions supplied with the unit.
Guide Rail Systems in Hazardous Locations
When working in a hazardous location, all precautions to
minimize ignition sources such as spark and flame should be
taken to limit the potential for fire or explosion.
For hazardous locations,
use of a guide rail system shall be of a
non-sparking design. Contact Liberty Pumps for available models.
Opera tion
Energizing the control panel or breaker for the first time is
potentially dangerous. Licensed electrical personnel should
be present when the panel or breaker is energized for the first
time. If faults caused by damage or poor installation practices
have not been detected, serious damage, injury or death can
result when power is applied.
Starting System
1.
Double check all wire connections.
2.
Turn pump(s) to OFF position on H-O-A switch.
3.
Turn on breakers.
4.
Test each pump separately in Hand mode and observe
operation. If 3-phase pump is noisy or vibrates, rotation is
3-Phase Pump Rotation Verification
5.
Set H-O-A switch(es) to AUTO position and allow water to rise
in basin until one pump starts. Allow pump to operate until
the level drops to turn-off point.
6.
Allow basin level to rise to start other pump(s). Notice run
lights in panel. Pumps should alternate on each successive
cycle of operation.
7.
Turn H-O-A switch(es) to OFF position and allow basin to fill
to the override (alarm) control level(s).
8.
Observe all floats in operation to verify that there is adequate
clearance to the surrounds to ensure that the floats do not
have the opportunity to get hung up in their travel.
9.
Verify alarm system response.
10.
Turn switch(es) to AUTO position; pumps should start and
operate together until level drops to turn-off point.
11.
Repeat this operation and cycle several times before leaving
the site.
12.
Check voltage when pumps are operating and record the
amp draw of each pump. Check amps on each wire as
sometimes a high leg will exist. For excessive voltage on one
leg, the electric utility company shall be consulted.
13.
Complete Startup Report.
Be certain to complete adequate testing, especially on systems
with multiple pumps or custom control configurations.
Ma intena nce a nd Troubleshooting
Accidental contact with electrically live parts, items, fluid, or
water can cause serious injury or death.
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.
Do not enter a pump basin after it has been used. Sewage and
effluent can emit several gases that are poisonous.
Wear adequate Personal Protective Equipment when working
on pumps or piping that have been exposed to wastewater.
Sump and sewage pumps often handle materials that can
transmit illness or disease upon contact with skin and other
tissues.
Additional Warning for Hazardous Locations
Use only non-sparking tools and components in and around
basins, open covers and vents. Do not use electronic devices
that are not rated for use in hazardous locations or have live,
exposed electrical circuits in or around basins, open covers
and vents. Sewage and effluent systems produce and may
contain flammable and explosive gases and sparks could
ignite these gases.
All electrical and motor repairs and service must be
performed by a repair facility approved by Liberty Pumps and
certified to work on explosion-proof motor enclosures.
Power and control cords are not field-replaceable unless
Liberty Pumps Quick-connect cords are used. Refer to the
Service Manual for Quick-connect cord replacement
instructions. Service for damaged power or control cords
must be performed by the factory or a repair facility approved
by Liberty Pumps and certified to work on explosion-proof
motor enclosures.
RISK OF FIRE
RISK OF SERIOUS INJURY OR DEATH
RISK OF ELECTRIC SHOCK
RISK OF SERIOUS INJURY OR DEATH
