PARALLELING PROCEDURE INSTRUCTIONS
I.
HIGH FLOAT SWITCH IN FLOAT POSITION
1.
Chargers to be paralleled .must be of the same voltage rating
2.
Turn one charger on. Charge the battery to full charge. Set the voltage control potentiometer so the desired
float voltage is maintained at a trickle charge rate.
3.
Apply the DC load. The charger should maintain the voltage constant while carrying the load providing the
load does not exceed the charger current rating
4.
Turn charger #1 off and turn on charger #2. Set the voltage control potentiometer to float charge as per (2).
Apply load as per (3)
5.
Turn both chargers on and applyload
6. Adjust the potentiometers of both units until the load is shared equally at the desired float voltage.
7.
After a short period of time, one unit may assume more of the load Readjust the lower output charger so that
the current is less than half the load Adjusting for exactly hall the load may over compensate and after a
period time, assume more than half the load.
8.
Once properly set, the charger should load share when the load is varied, from no load to full load.
9. Since there is no inter-connecting circuitry, and the units are completely isolated, both units regulate by
sensing buss voltage. At the no load and trickle charge rate, one charger may assume all of the trickle
current rate, with the other charger at zero current When loads are applied, the lower output unit will share
the load
10. When two chargers of the same rating are paralleled, one unit may have more capacity than the other, and
thus carry a greater percentage of the load When the chargers are operating in current limiting, one charger
may be supplying more current than the other since the current limit between chargers may vary between
110% and 130% of rated capacity.
II.
HIGH FLOAT IN EQUALIZE OR HIGH POSITION
1.
When units are required to parallel in the equalize or high position, the chargers should be equipped with
dual float and equalize potentiometers.
2.
Follow the same procedure for setting the potentiometer as described in "float position." NOTE: Set
potentiometer for the required equalize voltage.
3.
If dual pots are not furnished, the balancing adjustment must be made by adjusting the green slider on
voltage control resistor RVI with the unit. NOTE Be certain when making this adjustment that special care is
taken not to break or damage the slide wires of the RVI Resistor
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