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LESTRONIC II FULLY AUTOMATIC
MODEL 17910
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.
turns 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
108-128 Volts AC, 12 Amp, 60 Hertz, single-phase
48 Volts DC, 21 Amp
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
TYPE 48LC21-6ET
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:
01537C
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Table of Contents
Related Manuals for Lester LESTRONIC II 17910
Summary of Contents for Lester LESTRONIC II 17910
- Page 1 LESTRONIC II FULLY AUTOMATIC BATTERY CHARGER MODEL 17910 TYPE 48LC21-6ET Specifications AC Input: 108-128 Volts AC, 12 Amp, 60 Hertz, single-phase DC Output: 48 Volts DC, 21 Amp Connections: Input - 6 or 9 ft. AC input cord with NEMA 5-15 grounded plug Output - 8½...
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Page 2: Grounding Instructions
CAUTION: ONLY CIRCUITS WARNING: IMPROPER CONNECTION OF PROVIDED WITH A MAXIMUM OF 20 AMP (15 EQUIPMENT-GROUNDING CONDUCTOR CANADA) BRANCH CIRCUIT CAN RESULT IN RISK OF AN ELECTRIC SHOCK. PROTECTION IN ACCORDANCE WITH THE The conductor with insulation having an outer NATIONAL ELECTRICAL CODE ANSI/NFPA 70 surface that is green, with or without yellow stripe(s), AND ALL LOCAL CODES AND ORDINANCES. - Page 3 If the ammeter still reads more than 25 amperes ATTENTION: Utiliser pour charger after 30 minutes, turn the charger off by uniquement les accumulateurs au plomb a disconnecting the power supply cord from its electrolyte liquide. D'autres types d'accumu- outlet. ateurs pourraient éclater et causer des blessures ou domages.
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Page 4: Proper Care Of Deep Cycle Motive Power Batteries
WHICH CAN CAUSE BODILY HARM. DO NOT b. Charging new batteries (batteries with less than 50 discharge/charge cycles). PUT WRENCHES OR OTHER METAL OBJECTS ACROSS BATTERY TERMINAL c. Charging cold batteries (ambient temper- BATTERY TOP. ARCING OR EXPLOSION OF atures below 65°F). When charging new or THE BATTERY CAN RESULT. -
Page 5: Troubleshooting Guide
8. The tops of the batteries and battery hold-downs 1. CHARGER DOES NOT TURN ON must be kept clean and dry at all times to The DC plug must be disconnected and prevent excessive self-discharge and flow of reconnected to start the charger after turn off. current between the battery posts and frame. -
Page 6: Wiring Diagram
This condition can be caused by a charger operates properly on other circuits, have a problem, a "weak" fuse or circuit breaker qualified electrician inspect and test the original protecting the circuit, or an overloaded circuit. If circuit. If the charger causes other fuses or the building AC power fuse or circuit breaker circuit breakers (in the building) to blow, the blows, connect the charger to other outlets (on... - Page 7 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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Questions and answers
Why does our little red light say it is on but it keeps flashing and does not charge the batteries