Operating Instructions
1
01806E
LESTRONIC II FULLY AUTOMATIC
BATTERY CHARGER
MODEL 20330-95
Specifications
AC Input:
108-128 Volts AC, 12 Amp, 60 Hertz, single-phase
DC Output:
48 Volts DC, 21 amps
Connections:
Input – 6 or 9 ft. AC input cord with NEMA 5-15 grounded plug
Output – 8½ ft. or longer output cord with polarized connector
PLEASE SAVE THESE IMPORTANT SAFETY AND OPERATING INSTRUCTIONS
For correct operation of the equipment, it is important to read and be familiar
with this entire manual before installing and operating the charger.
DO NOT DISCARD THIS MANUAL AFTER READING.
LOOK FOR THIS SYMBOL TO POINT OUT SAFETY PRECAUTIONS. IT MEANS:
BECOME ALERT—YOUR SAFETY IS INVOLVED.
IF YOU DO NOT FOLLOW THESE
SAFETY INSTRUCTIONS, INJURY OR PROPERTY DAMAGE CAN OCCUR.
Features
•
Patented DV/DT electronic timer monitors battery state-of-charge while charging and automatically turns charger off as
battery reaches full charge.
•
Compensates automatically for AC input line voltage variation by high reliability ferroresonant transformer design. Supply
voltage var 10% from nominal, + 1% maximum battery charger voltage variation, decreasing to + ½% at finish rate
with constant electrolyte temperature. No taps or rate controls to set.
•
Automatic decrease of charge rate for superior battery life through good equalization of cells and low water use rate.
•
Silicon diodes with inherent surge protection operated at a conservative percentage of their rating.
•
Convection-cooled design for maximum reliability and minimum maintenance.
INTRODUCTION
The Lestronic II automatic battery charger is
designed to recharge deep-cycle, lead-acid
batteries. A ferroresonant transformer is used to
provide a highly reliable, line-compensating unit with
a minimum of moving parts, designed for long,
trouble-free service. A patented electronic timer
urns the charger on and off automatically. This
DV/DT electronic timer determines full charge of the
batteries by measuring the rate at which the battery
voltage increases during charge. When the voltage
stops rising, the battery is fully charged and the
charger turns off.
INITIAL INSTALLATION
The AC line to which the charger is to be connected
must be capable of supplying 15 amperes to this
charger.
