Kussmaul Electronics 091-171 - Manual (Page 4)

INSTALLATION
The Add-A-Bat should be installed in an area with adequate ventilation. The solenoid must be
installed as close as possible to the two batteries in order to limit the voltage drop in the high
current cables. The bar graph display should be located in a convenient place for the operator.
1. Mount the charger and solenoid using the holes shown in the outline drawing.
2. Connect the wiring from the batteries to the output terminal strip. Ferrule lugs that
have been securely crimped or soldered should be used.
3. Wire the indicator per the diagram.
4. Double check all wiring.
5. Turn on 115 volt AC power and note that power indicator is illuminated.
6. Note that charger output is 13.25 volts for each battery when batteries are fully charged.
Output volts may be lower while charging.
7. With both batteries fully charged, crank engine and note that the solenoid is energized
during cranking cycle.
SYSTEM OPERATION
The Add-A-Bat in addition to the dual independent automatic battery charger contains a
solenoid controller. The solenoid controller receives its power from the ignition switch. With
the switch “OFF” all the power is removed from the system and the solenoid is de-energized.
As soon as the operator turns the ignition switch “ON” the system is powered and detects the
voltage of the main and auxiliary batteries. If the auxiliary battery is 12.4 volts or greater,
(indicating sufficient charge) cranking the engine will cause the paralleling solenoid to be
energized. The engine is cranked with the two batteries in parallel yielding a faster start. A 10
second timer will maintain the solenoid if the engine doesn’t start immediately and must be
cranked a second time. When the engine starts, the alternator output raises the battery voltage
so that the solenoid remains energized and both batteries are charged.
If when the engine is started the auxiliary battery is below 12.0 volts the paralleling solenoid
is not energized while cranking. As soon as the engine starts the alternator raises the main
battery voltage and the solenoid is energized charging both batteries.
Upon engine shut down the ignition switch is placed in the “OFF” position. Power is removed
from the solenoid controller and the solenoid is de-energized. The batteries are thus isolated.