Product Manual
7
Allow at least 1 inch of clearance all around the case for cooling. The best mounting congu-
ration is to mount the unit on a vertical surface oriented as shown. Use #10 screws of the
appropriate type for the mounting surface to securely mount the unit.
The case has 500 volts of isolation from both the input and output, so it may be mounted on
any surface without fear of electrolysis or ground fault.
The unit is supplied with input leads 1 meter long of #10 AWG wire. This should be adequate
to connect to a breaker panel or other source of power. If you need to extend the wires, use
at least #10 AWG wire and solder and heat shrink the connection to protect the joint. Connect
the Red wire to Positive, and the Black wire to Negative. If the unit is being run from a 24V
battery system, use a 30 amp panel breaker to feed power to it, and use a 20 amp panel
breaker for a 32V battery system. Each BCD300 Series battery charger should have its own
breaker in the panel.
To reduce radio noise to the absolute minimum, it may be necessary to bond the case to the
vessel ground. To do this, use the ground stud located next to the input fuse.
The charging battery bank(s) may be wired directly to the output terminals of the unit, or the
unit can be wired to a distribution panel if it is more convenient. It is recommended to keep all
wiring as short as possible to keep the line losses to a minimum.
Operation
To turn the unit on, simply move the power switch to the ON position. The alarm buzzer will
sound and the Low Input LED will come on briey, and then the green Output ON LED will
illuminate. If you wish to adjust the output 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. Clockwise increases the output voltage, and counter
clockwise decreases it. When you are done, replace the cover plate and securely tighten the
screws.
You may connect up to 2 banks of batteries to the unit. Connect the ‘+’ output of the unit to
the positive lead of the battery bank. Connect the ‘-’ output of the unit to the negative lead
of the battery bank. Each ‘+’ output is diode isolated from the other. The ‘-’ outputs are elec-
trically common. If you accidentally connect a battery in reverse, the output fuse (AGC 30)
will blow. If this happens, correct the connection of the battery, conrm it with a voltmeter,
and then replace the fuse.
When the unit is rst turned on, it will charge the batteries at a constant current of 25 amps
for the -12 model and 20 amps for the -24 model. The current will divide between the battery
Installation