FILE: IM_091-120-12E-20
Rev A., 05-06-08
INSTRUCTION MANUAL
R
AUTO CHARGE
3 STEP
AUTOMATIC BATTERY CHARGER
MODEL #091-120-12E-20
for ODYSSEY AGM BATTERIES
CAUTION
This charger is calibrated to the ODYSSEY
requirement of 14.7 volts in the bulk/absorp-
tion range and 13.6 volts in the float mode
DO NOT USE TO CHARGE A NORMAL LEAD
ACID BATTERY
3 YEAR WARRANTY
KUSSMAUL ELECTRONICS CO., INC.
170 CHERRY AVE., WEST SAYVILLE, N.Y. 11796
TEL: in NY 631-567-0314 TOLL FREE: 800-346-0857 FAX: 631-567-5826 EMAIL: Sales@Kussmaul.com
INTRODUCTION
The Auto Charge-3 STEP CHARGER, Model 091-120-12E-20 is a compact, completely
automatic single channel battery charger designed specifically for periodic charging of
ODYSSEY AGM Batteries. Of rugged construction, the charger is made to withstand the
shock and vibration encountered in vehicle mounted equipment. Utilizing components,
which meet international safety standards, makes this charger ideal for worldwide applications.
BATTERY CHARGER FEATURES
Completely automatic operation, charges battery on demand
Output Voltage regulated, eliminates overcharging battery
Output, current limited to protect charger from overloading
A 5-LED display indicating charge state and faults
Reverse polarity protection
INSTALLATION
The 3 STEP CHARGER should be installed in an area with adequate ventilation.
Mount the charger using the four holes provided.
Connect wiring from the battery to the output terminal strip.
Double check battery wiring. Verify that the battery voltage appears at the charger
output terminals (See Figure 2).
PRINCIPLES OF OPERATION
The Odyssey three-step charger operates in the three stages described below:
1) A discharged battery is recharged at a constant current (bulk charge) until its voltage
reaches an overcharge level of 2.45 volts per cell. At this time the charger will switch to
Finish Charge. The battery accepts 75-85% of its capacity during bulk charge.
2) This overcharge voltage is now maintained constant at 2.45 volts per cell (absorption
or finish charge) for eight (8) hours.
3) After an eight (8) hour Finish Charge Stage has completed, the charger will "Time Out"
to a Float Charge Stage where in the battery under charge will receive a 13.6VDC Float
Charge or 2.26VDC per cell. The battery is maintained at full charge during Float
Charge, and the green indicator labeled “Battery Charged” AND red indicator labeled
"Time Out" will be illuminated.
Figure 1 depicts the above described operation. Note that the term “absorption charge” is
used interchangeably with “finish charge”. Upon application of AC power, the charger is
placed into bulk charge if necessary. When the charger switches to finish charge, a timer
starts. This timer has a duration of eight (8) hours after which the charger will automatically
go to float charge (Battery Charged green indicator) and a timeout will be indicated.
A battery fault indicator is provided to indicate the absence of a battery, a battery connected
with reverse polarity, or a battery with an open circuit terminal voltage of less than 1.35 volts
per cell.
THREE STAGE CHARGING CURVE
Model: 091-120-12E-20
BATTERY
CURRENT
I Limit=20.0A
BATTERY
VOLTAGE
Voltage Increasing
Current Constant
STAGE I
CONSTANT CURRENT
(BULK)
14.70VDC
8.0 Hours
Voltage Constant
Current Decreasing
STAGE II
CONSTANT VOLTAGE
(ABSORPTION)
ABSORPTION STAGE
13.60VDC
FLOAT
STAGE
Voltage Constant
Full Charge Maintained
STAGE III
CONSTANT VOLTAGE
(FLOAT)
TIME
Figure 1
A.C. Input Power
FUSE
CAUTION: THIS CHARGER IS CALIBRATED FOR ODYSSEY PC SERIES BATTERIES
14.7 VOLTS BULK CHARGE, 13.6 VOLTS FLOAT, DO NOT USE WITH NORMAL LEAD ACID BATTERY
INPUT
LN
OUTPUT
BAT
+
BATTERY CHARGED
BATTERY FAULT
TIMEOUT
BULK CHARGE
FINISH CHARGE
Line
Neutral
Ground
#12
AWG
Figure 2
Specifications
Model: 091-120-12E-20
Input Power: 115VAC, 60Hz, 4.7Amps
Input Over Current Protection: Fuse; 8Amp, Slow-Blow
Output Power: 12 to 14.7VDC, 20Amperes Current Limited
Charge Indicator: 25Amperes
Mode Indicators:
Battery Fault: Red
Time Out: Red
Bulk Charge: Yellow
Finish Charge: Yellow
Battery Charged: Green
Weight: 22 Pounds
6.75
12.00
AUTO CHARGE
12.75
4.75
9/32" DIA. 4 HOLES
4.25
Figure 3
OUTLINE DRAWING
INSTALLATION RECORD & WARRANTY
Date Installed
Installed By
Vehicle Identification
Vehicle Owner
WARRANTY
All products of Kussmaul Electronics Company Inc. are warranted to
be free of defects of material or workmanship. Liability is limited to repairing or replacing at our factory, without charge, any material or defects
which become apparent in normal use within 3 years from the date the
equipment was shipped.Equipment is to be returned, shipping charges
prepaid and will be returned, after repair, shipping charges paid.
Kussmaul Electronics Company, Inc. shall have no liability for damages of any kind to associated equipment arising from the installation and
/or use of the Kussmaul Electronics Company, Inc. products. The purchaser, by the acceptance of the equipment, assumes all liability for any
damages which may result from its installation, use or misuse, by the
purchaser, his or its employees, or others.
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