Contax SW 2524, Owner'S Manual, Page: 160 / 322

Basic Setup Programming
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Silent Mode After a bulk and absorption charge cycle is complete, the
charger will shut down (go silent). AC voltage on the inverter’s input will
pass-through to the loads. The charger continues to monitor the battery
voltage in this mode and starts a float charge when certain conditions are
met:
•
The batteries have discharged below the setting in menu item
20A Refloat Low Volts DC .
• The battery voltage has increased above the value set in menu
20B Refloat High Volts DC .
Equalize Charging the Batteries
Many battery manufacturers recommend periodic equalize charging to
level out the voltage between individual cells resulting in better battery
performance and life.
Over time, the battery’s electrolyte can become “stratified” causing
inactive areas in the plate material. If this condition is allowed to continue
for extended periods, the battery plates can “sulfate” and become
unusable. Equalizing the batteries is a controlled overcharging method
that mixes up the electrolyte and reactivates the unused areas of the plate
material, restoring batteries to a full state of charge.
Consult the battery manufacturer’s recommendation for equalize charging
settings.
Notes:
• When in Silent Mode after entering the Float Charge, the charger
remains in the Float Mode until the time set in
20F Must Float
Time and the level set in 20E Float Done Amps have been reached.
• In Silent Mode, the transfer time between utility power and the
inverter is slower than in Float Mode. If your application is
dedicated to sensitive loads (such as computers), we recommend
Float mode. Silent Mode is not recommended for off-grid
applications.
• If the AC input should fail or drops below the lower Vac limit (as set
in menu item
13D Input Lower Limit VAC ), the complete
multi-stage charge cycle (Bulk, Absorption, Finish) will be
re-initiated once the source AC returns to an in-tolerance condition.
• Selecting Silent Mode for the Battery Charging Finish Stage is an
Advanced Setup Application and requires additional parameters be
established in Menu Heading
20 Silent Setup Menu .