Owner`s manual

User Control Panel
The user interface panel is the long blue panel with yellow text near the top of the
PFC charger. The main things most users need to be concerned with are the LED
indicators, the VOLTS TRIM and the adjustable AMPS knob. Below are
explanations of each feature in order from left to right. Refer to figure 02 for specific
locations.
“VOLTS TRIM”
This controls the peak DC voltage ceiling that the charger will allow the batteries to
reach before limiting the current. Unless specified otherwise, the voltage limit is
specifically calibrated and set by Manzanita Micro to 191 Volts (for a 156V nominal
pack.) In the event that adjustment is desired, please follow the instructions below.
Starting in 2010, a special insulated screw driver for adjusting the volts trim is
shipped with each new Manzanita PFC charger.
NOTICE! Always use an appropriately sized insulated screw driver when adjusting
the voltage trim potentiometer. Suitable drivers are available for purchase from
Manzanita Micro or other electronics components manufacturers. (Mouser part #:
594-8T000, Vishay/Spectrol Adjust Tool, www.mouser.com)
figure 03. Adjustment Tool # 008T000
NOTE: If the battery pack is especially cold for any reason such as outdoors in a
cold season or climate, the peak charging voltage threshold may need to be raised
in order to assure a complete charge. This is especially true for lead acid batteries.
Many users turn the volts trim to the absolute maximum safe level for the batteries
during the winter and then back down to normal during the summer months. Always
consult your battery manufacturer for information on the peak “fully charged” voltage
specifications and how they change based on temperature.
NOTE: The peak voltage regulation set point on a Manzanita Micro charger is
accurate to within 5 volts or less. Follow the “Volts Trim Calibration” instructions
below and make the initial adjustment with the amps knob completely down so that
no current is flowing. Gradually turn up the amps knob and nudge the volts trim
potentiometer up accordingly. Use caution on the first charge cycle and make sure
to check that the point at which the charger volts trim limit is reached is really the
correct voltage for your specific batteries.
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