Product Manual
8
Operation
Prior to turning on the unit, you must decide on which charging prole, 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 prole.
Once you have decided on the charging prole you must set the switch to the correct posi-
tion. To access the switch remove the cover plate (secured by 2 screws). Set the switch to
the correct position as shown on the label. When you are done, replace the cover plate and
securely tighten the screws.
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 briey, and then the green OUTPUT ON LED will
illuminate.
When the unit is rst turned on, it will charge the batteries at a constant current and the
charging light will be on. After a period of time, which may be minutes to hours, the batter-
ies will reach the oat voltage at which time the charging light will go off, and the charging
current will reduce as necessary to maintain the batteries at that voltage. 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 to 13.6, 27.2, 36.3 or 54.4 VDC, which is generally recommended for
lead-acid batteries. If you wish to adjust the charging voltage, remove the cover plate (secured
by 2 screws) to expose the output adjust potentiometer. 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. When you are done, replace the cover plate and securely tighten
the screws. It is advisable to check with the battery manufacturer before changing the oat
voltage.