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Part No. 90-0123-00
Libertycombi.p65 10/26/98
4
This owner’s manual describes the
Freedom 458 Series Combi
TM
Inverter/
Chargers from Heart Interface. These units
perform three distinct functions:
1. DC to AC power inverting.
2. Automatic transfer switching between
inverter power and incoming AC power.
3. Automatic 3-Stage Battery charging plus
manual battery equalizing.
• The inverter provides regulated 120 volt AC
power at a crystal controlled frequency from a
deep cycle battery bank and is rated at:
Freedom 15 & 15D 1500 watts
Freedom 20 & 20D 2000 watts
The output is a modified sine wave and is
compatible with most appliances, tools and
other 120 VAC equipment. (Note: Certain laser
printers, breadmakers, digital clocks and
small battery chargers may not operate on
modfied sinewave.) An idle mode reduces
battery power consumption when loads are
removed from the inverter. There is a low
battery cutout protection circuit and
momentary surge power of more than twice
the inverter rating for starting electric motors.
High efficiency insures the longest possible
battery life between charges.
• The internal transfer switch allows the
Freedom Inverter/Charger to be connected to
an external AC source and transfer the source
INTRODUCTION
power through directly to the loads. When the
external AC power source is disconnected, the
transfer switch allows automatic switching
back to the inverter.
The Freedom Inverter/Charger operates
as a self-contained backup power system, just
add batteries.
• Freedom battery chargers are electronically
controlled and rated at a maximum output
current:
Freedom 15 & 15D 75 Amps DC
Freedom 20 & 20D 100 Amps DC
They are designed to rapidly and optimally
charge wet, gel, or Absorbed Glass Mat
(AGM)** cell deep-cycle batteries. Battery
charging is automatically accomplished in 3
stages: Bulk Charge, Acceptance Charge and
Float Charge.
Using a Remote Control Panel or Link
Instrumentation, a manually engaged
Equalizing Charge cycle is possible. Simple,
automatic operation is made possible by the
microprocessor in the Freedom Inverter/
Charger. In most cases, no attention or
maintenance is required.
Electronic Protection
Fast-acting electronic circuits protect
the inverter from overloads and short circuits.
Other protection includes a low and high
battery voltage cutoff and automatic shutdown
if an over temperature condition occurs. When
the fault condition is corrected, the unit will
automatically reset. Example: remove
overload, charge batteries or allow to cool.
**Battery type selection is set on the front of the unit
or with an optional remote (Remote Control Panel or
Link Instrument).
Freedom 20D