Product Manual

8
To ensure spark free connections the power switch must be in the OFF position prior to making
the connections to the battery bank(s).
The unit may be hooked to 1, 2 or 3 battery banks. If you are hooking up 2 or 3 battery banks
keep in mind that they MUST share a common ground! If you are hooking up 3 battery banks,
hook them up as is shown below.
OUTPUT 1
OUTPUT 2
OUTPUT 3
BATT
BANK #2
BATT
BANK #1
BATT
BANK #3
Operation
Prior to turning on the unit, you must decide on which charging prole, 2 or 3 stage charging,
to use. To help you decide, please see the following section entitled 2 or 3 Stage Charging to
determine the charging prole.
Once you have decided on the charging prole you must set the switch to the correct position.
The switch is located to the right of the output terminal on the front panel. Set the switch to
the correct position as shown on the label.
To turn the unit on, simply move the power switch to the ON position. The alarm buzzer will
sound and the Low Output LED will come on briey, and then the green OUTPUT ON LED will
illuminate.
When the unit is rst turned on, it will charge the batteries at maximum current and the
charging light will be on. After a period of time which may be minutes to hours, the batteries
will reach the absorption voltage (3-stage) or oat voltage (2-stage), and the charging current
will reduce as necessary to maintain the batteries at that voltage. Once the charging current
has dropped to a low level (about 10% of the charging current rating), the charging light will
go off, and if set to 3-stage charging the voltage will drop to the oat level. You may check
this voltage at the output terminals of the unit with a good digital voltmeter. As shipped from
the factory, the unit is preset for a oat voltage of 13.6, 27.2 or 36.3 VDC, which is generally
recommended for lead-acid batteries. The output adjust potentiometer is located to the right
of the 2 stage / 3 stage select switch. If you wish to adjust this voltage, reach in with a very
small at blade screwdriver to rotate the potentiometer. Please Note that this adjusts both the
oat and absorption voltages at the same time. Clockwise increases the output voltage, and
counter clockwise decreases it. It is advisable to check with the battery manufacturer before
changing the oat voltage.