B) Time-Out Circuit - NewMar PHASE THREE PT-14 Installation & Operation Manual

A typical three stage charging cycle is illustrated in FIGURE 4.
FIGURE 4: Typical Charger Output Graph (into battery without load)
The bulk/absorption stages last approximately 10 hours maximum at factory setting.
Note: If a load is applied during the absorption phase, the charger may revert to the bulk phase
depending on the total current draw. When the charger switches to the float phase, it will remain
in that phase regardless of current draw. The charger is still able to deliver full output current
when in the float phase. To re-initialize the three stage process shut the charger off momentarily,
then back on again (or press the reinitialize button on the optional remote panel)

B) Time-Out Circuit

Batteries have a tendency to lose their electrolyte and may be damaged if they are
maintained for long periods of time in the elevated voltage of the absorption phase.
Therefore, the Phase Three Charger employs a special time-out circuit. This circuit is
initialized each time a.c is first applied to the charger (or when the reinitialize button on
the optional remote panel is activated) and runs for a pre-set interval before forcing the
charger to go into the float (lower voltage) mode. The functioning of the charger during
this interval is as follows:
If the current demand of the batteries/load falls below 5-15 % of the charger's output
capacity prior to the circuit timing-out, the charger will automatically switch to the float
mode. If demand rises to about 10-20 % of charger output capacity, it will return to the
elevated output voltage of the absorption phase. This switching back and forth between
modes may occur until the circuit times-out (8-10 hours after a.c. is first applied), after
which the charger will remain at float voltage, until the circuit is re-initialized, either
by turning the charger off and then on again or by presssing the re-initialize button on
the optional remote panel.
Installation Note: The time-out circuit of the PT charger has been set at about 8-10
hours, which is appropriate for battery systems within the capacity range specified on
the front panel of the charger. If the charger is used with a battery system with a capac-
ity near (or outside) the upper or lower ranges of the specified range of the charger,
P.O. Box 1306
Newport Beach,
California 92663
www.newmarpower.com
Phone: 714-751-0488
Fax: 714-957-1621
E-Mail: sales@newmarpower.com
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