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LESTRONIC II FULLY AUTOMATIC
AC Input:
DC Output:
Connections:
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.
LOOK FOR THIS SYMBOL TO POINT OUT SAFETY PRECAUTIONS.
BECOME ALERT—YOUR SAFETY IS INVOLVED. IF YOU DO NOT FOLLOW THESE
SAFETY INSTRUCTIONS, INJURY OR PROPERTY DAMAGE CAN OCCUR.
• 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 variation + 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
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.
urns the charger on and off automatically.
DV/DT electronic timer determines full charge of the
batteries by measuring the rate at which the battery
Operating Instructions
BATTERY CHARGER
MODEL 20330-95
108-128 Volts AC, 12 Amp, 60 Hertz, single-phase
48 Volts DC, 21 amps
Input – 6 or 9 ft. AC input cord with NEMA 5-15 grounded plug
Output – 8½ ft. or longer output cord with polarized connector
DO NOT DISCARD THIS MANUAL AFTER READING.
deep-cycle,
lead-acid
A patented electronic timer
Specifications
Features
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
This
charger.
1
IT MEANS:
01806E
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Table of Contents
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Related Manuals for Lester 20330-95
Summary of Contents for Lester 20330-95
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Page 1: Battery Charger
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 –... - Page 2 CAUTION: ONLY CIRCUITS WARNING: IMPROPER CONNECTION OF PROVIDED WITH A MAXIMUM OF 15 AMP EQUIPMENT-GROUNDING CONDUCTOR BRANCH CIRCUIT PROTECTION CAN RESULT IN A RISK OF ELECTRIC SHOCK. ACCORDANCE WITH THE NATIONAL ELEC- The conductor with insulation having an outer TRICAL CODE ANSI/NFPA 70 AND ALL LOCAL surface that is green, with or without yellow stripe(s), CODES ORDINANCES.
- Page 3 If the ammeter still reads more than 25 amperes ATTENTION: Utiliser pour chargeur after 30 minutes, turn the charger off by uniquement les accumulateurs au plomb à disconnecting the power supply cord from its electrolyte liquide. D'autres types d'accumu- outlet. lateurs pourraient éclater...
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Page 4: Proper Care Of Deep Cycle Motive Power Batteries
b. Charging new batteries (batteries with less CAUTION: ALWAYS WEAR PROTECTIVE than 50 discharge/charge cycles). EYE SHIELDS AND CLOTHING WHEN WORKING c. Charging cold batteries (ambient tempera- WITH BATTERIES. BATTERIES CONTAIN tures below 65°F). When charging new or ACIDS, WHICH CAN CAUSE BODILY HARM. DO cold batteries, a higher than normal finishing NOT PUT WRENCHES OR OTHER METAL charge voltage can be expected. -
Page 5: Troubleshooting Guide
7. When the temperature falls below 65°F, the 5. THE BUILDING AC LINE CIRCUIT BREAKER OR FUSE BLOWS batteries should be placed on charge as soon after use as possible. Cold batteries require If the problem is other than listed above, refer to a more time to fully recharge. -
Page 6: Wiring Diagram
(in the building) to blow, the charger should other outlets (on different circuits) in the building. If be tested for a problem. WIRING DIAGRAM PARTS LIST FOR LESTRONIC II CHARGER MODEL 20330-95 120 VAC / 60 HZ PART NO. QTY. DESCRIPTION... - Page 7 W A R R A N T Y Lester Electrical warrants each new Lester Battery Charger for defects in material and workmanship for a period of two (2) years from the date of manufacture of the complete unit. Repairs can be made at the Lester factory. To do so, first obtain a "Return Material Authorization"...
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