Liberty Pumps 441 - Manual (Page 10)

©Copyright 2009 Liberty Pumps Inc. All rights reserved 10
3.
Operation / Troubleshooting
CHARGER OPERATION
The backup pump will activate automatically when the sump water level rises far enough to trip the float switch.
If the power to the charger circuit is interrupted, the length of time that the backup pump will run depends on the
Ampere-hour capacity of the battery used, the battery charge level, and the required vertical pumping distance.
Extended periods of operation (for example, during an extended power outage) may exhaust the battery. Once AC
power is restored, the battery charger will begin charging the battery as long as the battery has a voltage differential of
3Volts or more.
Recharge Time: Approximately 100+ hours to fully recharge a 27M battery in a “dead battery condition”.
Approximately 75 hours to recharge a 24M battery. Industrial standards define a “dead battery condition” as 9 Volts or
less.
The 5 Stages of the Charging Process: NOTICE: The LED’s will only illuminate once the AC power has been
applied. They will not light up if the charger is not plugged in.
1. Yellow LED light flashing on and off indicates:
Prequalification test stage is in progress. Normal duration of this stage ranges from 18 minutes to 27 hours. If a
battery has been left in a state of discharge for long periods this stage may require 27 hours to determine if the
battery will even accept a charge.
2. Yellow LED light continuously on indicates:
Constant current charge stage. Charger is charging battery at the full rated output. This stage ends when the
battery terminal voltage reaches the factory preset voltage level.
3. Yellow LED light continuously on also indicates:
Constant voltage charge stage. Battery cells are being equalized. This stage can last up to 72 hours.
4. Green LED light on indicates:
Float charge stage. Battery is charged and ready for use. Charging has stopped. To maintain a full charge on the
battery, the yellow and green LED may alternately turn back on. This means the charger is briefly turning back on
to keep the battery voltage from falling below a preset voltage level.
5. Recycle charge stage:
The charger automatically initiates a charge cycle that begins with the prequalification test stage. This occurs once
the battery has been in the float charge stage for 84 days.
Special Features:
• The charger is equipped with reverse battery, short circuit, and “run-away charge” protection.
• A built-in safety timer starts when the charger enters the Constant Current/Constant Voltage Charge stage
(Yellow LED is continuously on). The 441 system has a 90 hour safety timer.
• To reset the charger simply unplug it from the 120V outlet for 10 seconds and then plug it back in.
TABLE IV – Capacity Ratings with a 27M Marine Battery
VERTICAL PUMPING DISTANCE
8 FEET 10 FEET 12 FEET 16 FEET 20 FEET 24 FEET
Gallons Per Hour
2040 1920 1740 1140 620 0
* These flow rates were obtained with a fully charged group 27 battery. The actual GPH will vary depending on the
battery chosen and due to a reduction in output voltage from battery over the run time.