Liberty Pumps 441 Supplemental Instructions

Supplemental Instructions
Model 441 1.5A Charger System

Safety Precautions

Refer to accompanying back-up pump system manual 4414000
for all safety measures.
Follow the battery manufacturer's recommendations for
maintenance and safe use of battery.

1.5A Charger Operation

This section contains important safety and operating instructions
for the 12V battery charger. Keep it with or near charger at all
times.
Read this section and follow the instructions carefully before using
the charger.

Charger Location

• Locate charger as far away from battery as DC cables
permit, at least 2 feet above floor level.
• Never place charger directly above battery being charged
as gases from battery will corrode and damage charger, or
over any combustible surfaces.
• Never allow battery acid to drip on charger when reading
gravity or filling battery.
• Do not operate charger in a closed-in area or restrict
ventilation in any way.

DC Connection Precautions

• Connect and disconnect DC output terminals only after
removing charger from AC outlet.
Once power is applied, the charger will automatically begin
charging the system. When the battery is charged to "full" state,
the charger automatically switches to maintain the battery; it will
never overcharge the battery. It will monitor the battery voltage
and continue with peak performance to the battery.
The charger circuitry opens under severe overload. This condition
may occur if attempting to charge any severely discharged or
heavily sulfated battery. Once opened, the charger stops charging
for a short period and then automatically resumes charging. The
CHARGING LED will be OFF until charging resumes. Overloading
could be due to an external load; remove the load condition prior
to attempting to recharge the battery.
The charger has reverse battery and short circuit protection. If a
reverse battery condition exists, unplug charger from AC power
and reverse the connections.
The unit will automatically detect the battery internal cells
condition as well as battery sulfated conditions.
The charger has internal overheat protection. The charger will turn
off power until the temperature is down to a safe level, then
automatically start charging again. All LEDs will be off.
The charger is designed to charge 12 Volt batteries. Use AGM or
Wet Cell lead-acid batteries.
•
•
*Approximate charge time using a constant current charger at
standard amps as specified on the battery. Charging times may
vary depending on the Ah rating of the battery.
Copyright © Liberty Pumps, Inc. 2021 All rights reserved.
Never charge lithium ion batteries on this charger.
The charge time is dependent on the Ah rating of the
individual battery. See chart below.
100%
75%
50%
25%
0%
11.5 V 11.9 V 12.3 V
voltage
44140A0B
*Approximate
charge time
3–6 hours
5–11 hours
13–20 hours
12.7 V 13 V