OWNER’S MANUAL
FREEDOM COMBI
INVERTER/CHARGERS
TM
UL
Part No. 90-0113-00
Fdmman2.p65 2/98
FREEDOM MODELS 10, 15, 20, 25
®
A V alley Forge Company
Thank you for purchasing a Heart Interface Freedom Combi
Inverter/Charger.
TM
Heart Interface takes pride in manufacturing quality products specifically designed to
meet your power requirements.
Freedom Combi Inverter/Chargers provide silent, efficient and reliable AC power
for a variety of applications. They feature “hands-free” operation, automatic 3-stage
battery charging and automatic AC transfer switching. For your convenience, service is
available world-wide by qualified service centers.
If you have any questions about your Freedom Combi, please contact Heart
Interface toll free: (800) 446-6180.
For technical support and additional information about Heart Interface products,
visit our web site at http://www.heartinterface.com or send us e-mail:
techhelp@heartinterface.com
sales@heartinterface.com
For your convenience, we’ve included a record log on page 39. Regular system
maintenance is important for optimum performance of your Freedom Inverter/Charger.
Use this record to keep track of any changes to your electrical system.
SAFETY SUMMARY
General safety information for installation
and operation is contained throughout this
manual where it applies and is not included
in this summary .
Definitions Warning statements identify con-
ditions or practices which could result in personal injury, loss of life, damage to equipment
or other property.
Fuse Replacement For continued protection
against the possibility of fire, replace the fuse
only with a fuse of the specified voltage,
current and type ratings.
Power Source To avoid damage, operate the
equipment only within the specified AC (line)
and DC (battery) voltages.
Servicing To reduce the risk of electric shock
do not open this unit. There are no user serviceable parts inside. Refer all service to
qualified personnel.
The statements, specifications and instructions in this publication are believed to be correct. No warranty is made, expressed or implied by
the seller or manufacturer with respect to any results or lack thereof fr om the use of information in this publication and no liability is
assumed for any direct or consequential damages, personal loss or injury. All statements made herein ar e strictly to be used or relied on at
the user’s risk. © 1997, 1998 Heart Interface Corporation. All rights reserved.
2
Part No. 90-0113-00
Fdmman2.p65 2/98
TABLE OF CONTENTS
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . 4
Things You Should Know . . . . . . . . . . . . . 5
Circuit Breaker Protection
Electronic Protection
Thermostat Controlled Cooling
Inverter Idle Circuit
Low and High Battery Protection
Power Sharing
Remote Control Panels. . . . . . . . . . . . . . . . 6
Freedom Remote Control Panel
Link Instrumentation
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Battery Types
Battery Interconnection
Battery Bank Ratings and Sizing
Battery Charging. . . . . . . . . . . . . . . . . . . . 12
Conventional Battery Chargers
Freedom Battery Chargers
Charging Over-Discharged Batteries
Battery Charger Voltage Table . . . . . . . . .17
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 27
Freedom Remote Control Panel Addendum . 28
Remote Power Switch
System Status LEDs
DC Volts Bargraph
DC Amps Bargraph
Dip Switches
Dip Switch Status
Remote Control Wiring
Status LEDs
Dip Switch Programming
Troubleshooting
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 37
Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
System Record . . . . . . . . . . . . . . . . . . . . . . . . 39
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Installation Precautions . . . . . . . . . . . . . . 18
Installation . . . . . . . . . . . . . . . . . . . . . . . . . 19
Key Installation Points
Grounding
Neutral Bonding
AC Wiring
AC Output
Ground Fault Circuit Interrupters
Remote Control Wiring
DC Wiring
Battery Cable Fusing
Power ON Checks
Part No. 90-0113-00
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3
INTRODUCTION
This owner’s manual describes the
Freedom Combi
Inverter/Chargers from
TM
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 inverters provide regulated 120 Volt AC
power and crystal controlled frequency from a
deep cycle battery bank in specified watts:
Freedom 10 . . . . . . . . . 1000 watts
Freedom 15 . . . . . . . . . 1500 watts
Freedom 20 . . . . . . . . . 2000 watts
Freedom 25 . . . . . . . . . 2500 watts
The output is a modified sine wave and
is compatible with most appliances, tools and
other 120 VAC equipment. An idle circuit
reduces battery power consumption when the
loads are removed from the inverter. There is
a low battery cutout circuit and momentary
surge power of more than twice the inverter
rating is available for starting electric motors.
High efficiency insures the longest possible
battery life between recharges.
The Freedom Inverter/Charger operates
as a self-contained backup power system, just
add batteries.
• Freedom battery chargers are electronically
controlled and rated:
Model
Freedom 10
Freedom 15
Freedom 20*
Freedom 25
*Also available in 32 Volt model rated
at 35 Amps DC
12 Volts
50 Amps DC
75 Amps DC
100 Amps DC
130 Amps DC
24 Volts
25 Amps DC
N/A
50 Amps DC
65 Amps DC
They are designed to rapidly and optimally recharge either wet** or gel** cell
deep-cycle batteries. Battery charging is
accomplished in 3 automatic stages: Bulk
Charge, Acceptance Charge and Float
Charge. Using a Freedom Remote Control
Panel or Link Instrumentation, a manuallyengaged Equalizing Charge cycle is possible.
Simple, automatic operation is made
possible by the microprocessor in the
Freedom Inverter/Charger. In most cases, the
unit is left ON and no attention or maintenance is required.
• The internal transfer switch allows the
Freedom Inverter/Charger to be connected to
an external AC source and transfer the
source power through to the loads. When
disconnected, the transfer switch allows
automatic switching back to the inverter.
4
Electronic Protection
Fast-acting electronic circuits protect the
inverter from extreme overloads and short
circuits. Other protection includes a low and
high battery cutoff and automatic shutdown if
over temperature occurs. The fault condition
must be eliminated before reset will occur.
Example: remove overload, recharge
batteries or allow to cool. Reset by cycling the
power switch on the Freedom Remote Control
Panel, Link Instrument or the Freedom unit
one time--OFF/ ON.
**Adustable with optional remote (Freedom
Remote Panel or Link Instrumentation)
Part No. 90-0113-00
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THINGS YOU SHOULD KNOW
Circuit Breaker Protection
The Freedom Inverter/Charger is circuit
breaker protected. The INV/CHG breaker on
the front of the unit protects against sustained
inverter/charger over current conditions.
Model
Freedom 10
Freedom 15
Freedom 20
Freedom 25
Circuit Breaker
12 Amp
20 Amp
25 Amp
30 Amp
The 30 Amp INPUT circuit breaker on the
Freedom unit protects the incoming AC circuit.
The incoming AC circuit provides power to the
battery charger and transfers power to the
loads connected to the inverter AC output.
The breakers are reset by pushing the button
back in.
NOTE: Freedom 25 only. There are 3
circuit breakers on the Freedom 25. The
OUTPUT 30 Amp circuit breaker on the front
of the unit protects against sustained inverter
overloads. The TRANSFER 30 Amp circuit
breaker on the unit protects the incoming AC
leg which is transferred through to the loads.
The CHARGER 30 Amp circuit breaker
protects the incoming AC leg which feeds the
battery charger.
Thermostat Controlled Cooling
Freedom Inverter/Chargers are equipped
with a thermostat controlled fan that cools the
unit so it can operate continually at its rating.
Inverter Idle Circuit
This automatic energy saving feature
reduces battery power consumption when no
load is present. Response from idle is instant.
In most cases, the operation of the idle circuit
is not noticeable. Use of the Freedom Remote
Control Panel or Link Instrumentation allows
the idle circuit sensitivity to be adjusted. The
unit will not put out 120 Volts when in idle. To
bring the unit out of the idle condition, apply
a load.
Low and High Battery Protection
When the battery voltage drops to 10
Volts, the Freedom Inverter/Charger will automatically shut off. Recharge the batteries to
13.5 Volts (12 V model). For 24 Volt models,
recharge batteries to 31.0 Volts. For 32 Volt
models, recharge batteries to 41.38 Volts.
Freedom units will automatically reset when
shore power is disconnected or reset
manually by cycling the power switch OFF/ON
Shut down also occurs for a high battery
condition at 15.5 Volts. To restore inverter
operation, battery voltage must be below 15.5
Volts. Check all DC sources on the system for
excessive voltage.
Power Sharing
When connected to shore power or when
using a generator, the battery charger and
transfer functions are engaged. A unique
Power Sharing feature automatically reduces
the AC consumption of the battery charger
allowing necessary AC power to the load.
This prevents the source AC INPUT circuit
breaker from tripping.
The Power Sharing set point of each unit
has a factory default setting. This can be
adjusted using the Freedom Remote Control
Panel or a Link Instrument.
NOTE: Freedom 25 only. Since the
Freedom 25 has dual AC inputs, one transfer
and one charge, factory default setting for
Power Sharing is OFF. If only one leg is used
to supply both inputs, set Power Sharing
accordingly.
Part No. 90-0113-00
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5
REMOTE CONTROL PANELS
Freedom Remote Control Panel
An optional remote control panel is
available. When the remote is used, the
power switch on the unit should be left OFF.
The remote control panel provides LED
bargraphs which show system status, battery
voltage and DC current in both inverter and
charger modes.
These bargraphs can also display dip
switch positions and shutdown conditions. Dip
switches allow the selection of battery type,
battery temperature, idle sensitivity, Power
Sharing, manual equalizing and auto/manual
charge modes. Refer to the Freedom Remote
Control Panel Addendum, pages 28-34, in
this manual for more information.
Link Instrumentation
More advanced optional remote control
panels are also available: the Link 1000, 2000
and 2000R.
Link 1000 controls the Freedom Inverter/
Charger and provides complete battery stateof-charge information including DC voltage,
current, Amp-hours consumed, Time
Remaining and historical data for a single
battery bank.
The Link 2000 provides inverter/charger
control and complete battery state-of-charge
information for up to two battery banks.
The Link 2000R adds the ability to
control an engine-driven alternator. This
precision regulator transforms an alternator
into a 3-stage battery charging system.
If Link Instrumentation is used to control
the inverter/charger, refer to the Link Owner’s
Manual for setup and control information.
Refer to Installation Guide
for installation options.
6
Part No. 90-0113-00
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OPERATION
The Freedom Inverter/Charger provides
household 120 Volt AC power from auxiliary
DC batteries, automatic battery charging and
automatic AC transfer switching.
Power Switch
The Power Switch is located on the front
panel. This switch controls ON/OFF and
RESET for the inverter.
If the unit is connected to external AC
power, the battery charger and transfer switch
will continue to function, regardless of the
position of the switch.
Freedom 25 shown.
When external AC power is removed
and the power switch is in the ON position,
the inverter will automatically be ON. If the
switch is in the OFF position and external AC
power is removed, the inverter will be OFF.
Inverter overload protection, transfer
switching, default Power Sharing and 3-stage
battery charger regulation will all function
automatically.
If installed with the Freedom Remote
Control Panel or Link Instrument, the power
switch on the unit should be left in the OFF
position. Refer to Freedom Remote Control
Panel Addendum, pages 28-34, or the Link
Owner’s Manual.
Freedom 10 and 20 Circuit Breakers
INPUT
INV/CHG
Part No. 90-0113-00
Fdmman2.p65 2/98
Power Switch
Freedom 25 Circuit Breakers
CHARGER
TRANSFER
OUTPUT
7
BATTERIES
BATTERY TYPES
Use only deep-cycle batteries with your
Freedom Inverter/Charger. These fall into
three broad categories: wet cell, gel cell and
Advanced AGM (Absorbed Glass Mat)
batteries.
Wet Cell Batteries
True deep-cycle wet cell batteries are
characterized by relatively thick plates that are
alloyed with antimony.
It should be noted that high antimony
deep-cycle batteries will give off gas as a
natural result of charging and will experience
some water loss. It is very important that the
electrolyte level be checked frequently and
topped off with distilled water when necessary. Never allow the tops of the plates to be
exposed to air, as contamination of the cell
will result. Keeping the tops of batteries clean
will reduce self-discharging. Always provide
ventilation for the battery storage
compartment.
Do not use car batteries or engine
starting batteries of any kind with your
inverter/charger. Beware of any battery that is
rated in Cold Cranking Amps (CCA). This is a
rating which applies only to engine starting
batteries. In general, most wet cell batteries
that are described as hybrid batteries, suitable
for either engine starting or deep-cycle
applications, are a compromise and will have
limited life if deeply discharged.
Common marine/RV deep-cycle
batteries are acceptable. However, golf
cart batteries perform well and may have a
longer life. They are 6 Volt batteries that
must be used in series pairs. High quality
marine deep-cycle batteries offer good
performance and are available in a wide
variety of sizes. Floor sweeper, fork lift or
large 2 Volt cells can also offer excellent
performance, if their large size can be
accommodated.
8
Part No. 90-0113-00
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Part No. 90-0113-00
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Beware of so-called maintenance-free
batteries. These batteries have calcium
alloyed with the lead and hold the liquid
electrolyte in a sponge-like material. They are
sealed and water can not be added. Do not
confuse them with true gel cell or Advanced
AGM batteries, they will not hold up to deep
discharging and repeated cycling.
Gel Cell Batteries
Gel cell batteries are lead-acid batteries
similar in many ways to the common wet cell
battery, but differences in the chemistry and
construction provide some unique features.
• No Maintenance
• Low Self-Discharging
• Low Internal Resistance
Even though gel cells are sealed
batteries, the battery compartment should be
ventilated.
Advanced AGM (Absorbed Glass Mat)
Batteries
This battery is lead acid but
maintenance-free. The performance is similar
to gel cell batteries. The charge perameters
are similar to wet cell batteries.
Battery Selection The most important feature
to consider in making your battery selection is
to select true deep cycle batteries rated in
Amp-hours (AH).
BA TTERY INTERCONNECTION
In most cases, you will be using a bank
of two or more batteries with your inverter/
charger. You may connect batteries together
BATTERIES
in two configurations, series and parallel.
Series
Connecting two batteries in series will
double the voltage of the battery bank. For
instance, two 6 Volt batteries connected in
series will produce 12 Volts. The Amp-hour
capacity of the battery bank will be the same
as each individual battery. Example, two 6
Volt 220 Amp-hour batteries in series will
produce one 12 Volt 220 Amp-hour battery
bank.
Series
+
+
+
Series Increase Voltage
EACH BATTER Y
CAPACITY :
220
AMP-HOURS
@ 6 VDC
TOTAL BATTERY
BANK CAPACITY :
220
AMP-HOURS
@ 12 VDC
6V
6V
+
+
_
_
+
1
2V INVERTER
_
9
BATTERIES
Parallel
Connecting two batteries in parallel will
double the Amp-hour rating of the battery
bank, while the voltage will be the same as
each individual battery. Example, two 12 Volt
105 Amp-hour batteries in parallel will
produce one 12 Volt 210 Amp-hour battery
bank.
+
+
Parallel
Parallel Increase Amp-hour Capacity
+
12V
_
EACH BATTER Y
CAP ACITY:
105
AMP-HOURS
@ 12 VDC
12V
_
+
+
1
2V INVERTER
_
TOTAL BATTERY
BANK CAPACITY :
AMP-HOURS
@ 12 VDC
210
Note: It is not advisable to connect
batteries of different case sizes or Amp-hour
ratings in the same battery bank.
Always use wire and terminals for
your interconnecting battery cables which
are appropriate to handle the current. They
must be the same size or larger AWG as
the cables supplied with the inverter/
charger.
BA TTERY BANK RATINGS AND SIZING
Deep-cycle batteries are usually rated in
Amp-hours. The Amp-hour rating is based on
a 20 hour discharge cycle, therefore, a 100
Amp-hour battery can deliver 5 Amps for 20
hours. If the discharge rate is greater than 5
Amps, the available Amp-hours are decreased. For example, if the load is increased
to 100 Amps, only about 45 Amp-hours will
be available at this rate of discharge.
Deep-cycle batteries can be discharged
about 80% before permanent damage
occurs, though shallower cycling will result in
much longer battery life. 50% cycling is generally considered to be a good compromise
between long battery life and a reasonably
sized battery bank.
Only similar batteries should be
connected together in one bank. Do not
connect old and new batteries together or wet
and gel cell batteries together. In the above
drawing, the load is connected to the positive
terminal of the first battery and the negative
terminal of the last battery. This practice helps
to balance the battery bank and is called
cross-connecting
the battery bank.
10
Part No. 90-0113-00
Fdmman2.p65 2/98
BATTERIES
To achieve 50% cycling you should calculate your Amp-hour consumption between
charging cycles and use a battery bank with
twice that capacity**. Each AC appliance or
tool has a rating plate on it and will be rated in
either AC Amps or Watts or AC VA
(Volt-Amps) apparent power. To calculate
Amp-hour consumption, use one of the
formulas to the right to calculate the DC
Amp-hour draw for a 12 Volt system.
Calculate the Amp-hours for every AC
appliance or tool that will be operated on the
inverter. This will provide the total number of
Amp-hours used between recharges. Size the
battery bank using this number as a guideline.
A good rule to follow is to size the battery
bank a minimum of 2 times larger than the
total Amp-hour load requirement. Plan on
recharging when 50% discharged.
**Batteries are typically charged to 85% of full
charge when charging with alternators without 3-stage
regulators.
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AMP-HOUR CONSUMPTION FORMULAS
(AC Amps x 10) x 1.1 x hours of
operation = DC Amp-hours
(Watts/ DC Voltage) x 1.1 x hours of
operation = DC Amp-hours
(AC VA/ DC Voltage) x 1.1 x hours of
operation = DC Amp-hours
DC Voltage is 12, 24 or 32 depending on
your system.
In all formulas, 1.1 is the factor for
inverter efficiency.
Typical Power Consumptlon
The chart below identifies typical power
consumption for common AC loads. Use it as
a guide when identifying your power
requirements.
Many electric motors have momentary
starting requirements well above their opera-
tional rating. Start up watts are
listed where appropriate.
Individual styles and brands of
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appliances may vary.
If using the same battery
bank for the inverter and the DC
loads, be sure to consider the
power consumption of the DC
loads when sizing the battery
bank.
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11
BA TTERY CHARGING
Battery Charging
Completely recharging wet cell deepcycle batteries requires the battery voltage to
be raised beyond what is known as the
gassing point. This is the voltage at which the
battery begins to bubble and gas is given off.
If charging stops short of this point, sulfate is
left on the plates and deterioration of the battery begins. The gassing point will vary with
battery temperature.
At 77 degrees F, the gassing point of a
12 Volt battery is about 14.0 Volts. Battery
charging without excessive gassing of the
batteries is accomplished with three-stage
chargers. The Freedom Inverter/Charger
utilizes this technique.
Gel cell batteries must not be charged to
their gassing point. In fact, high voltage
charging which gasses these batteries is
harmful to them. They typically require a lower
bulk charge voltage and a higher float voltage
than wet cell batteries. Consult the battery
manufacturer for specifications.
Conventional Battery Chargers
Most conventional battery chargers are
single-stage constant voltage chargers. They
must stop short of the gassing point or they
will overcharge the battery bank. Most 12 Volt
battery chargers bring the battery voltage up
to about 13.8 Volts.
This presents two problems. First, since
the battery voltage does not reach the
gassing point, sulfate is left on the plates.
Second, 13.8 Volts is close enough to the
gassing point that some gas will escape, and
the wet cell battery will need to be frequently
topped off with distilled water.
Conventional battery chargers also suffer
from another inherent characteristic of design,
which is a tapering effect. While they will
deliver their rated current into a deeply discharged battery, as the battery voltage rises,
the output current of the charger tapers down.
This taper continues as the battery is
charged, taking a very long time to reach an
acceptable recharge level.
Freedom Battery Chargers
Freedom battery chargers are designed
to overcome the limitations of conventional
chargers by utilizing 3 distinct stages, each
designed for optimal recharging of both wet
cell and gel cell deep-cycle batteries. Battery
type selection is only available through the
Freedom Remote Control Panel or a Link
Instrument. Refer to the Freedom Remote
Control Panel Addendum, pages 28-34, or a
Link Owner’s Manual.
12
Part No. 90-0113-00
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BA TTERY CHARGING
NOTE: Freedom battery chargers are ON
whenever there is AC power connected to the
charger input, regardless of the condition of
the ON/OFF switch on the unit. The charger
can be controlled using the Freedom Remote
Control Panel or Link Instrumentation.
Each time the battery charger is engaged, the 3 stages proceed automatically,
resulting in an efficient complete recharge
and safe battery maintenance. Use of the
Freedom Remote Control or Link Instrumentation provides the ability to periodically apply
an equalizing charge.
Refer to Freedom Remote Control Addendum, pages 28-34, or the Link Instrumentation Owner’s Manual for more information.
Freedom 10 charge
curve shown.
The battery charger stages are:
Stage 1 -
charge stage most of the charge is delivered
to the battery bank. This phase is engaged
as soon as the battery charger is activated.
Full rated charger current is delivered to the
battery bank until the bulk charge voltage limit
is reached. This results in a relatively rapid
recharge.
Generally, a wet cell battery bank should
not be charged up to the gassing point at a
rate which exceeds 25% of its capacity.
Example, a 12 Volt battery bank of 520
Amp-hours should not be charged at over 130
Amps.
Bulk Charge
During the bulk
Part No. 90-0113-00
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13
BA TTERY CHARGING
Gel cell and Advanced AGM batteries
can accept a higher rate of charge. Consult
the manufacturer for specifications.
Stage
2 - Acceptance Charge
The
acceptance stage immediately follows the
bulk charge stage. During this stage the
battery voltage is held constant at the bulk
charge voltage limit and the current gradually
ramps down. During this stage the battery is
accepting its final amount of charge current
and the last of the sulfate on the plates is
removed.
The acceptance stage lasts until the
charge current reaches the transition point in
Amps. A timer will terminate the acceptance
stage if this current level is not reached. The
time is automatically set when the dip
switches for battery type are set on the
Freedom Remote Control Panel.
Maximum acceptance time is 1 hour for
wet cells and 3 hours for gel cells. Gel cell
acceptance time can be longer because they
are less likely to gas. Expect wet cell batteries
to gas somewhat during acceptance, this is a
necessary part of the charging process.
NOTE: Acceptance timers are not used
when Link Instruments control the charger.
Refer to the Link Owner’s Manual.
Stage 3
- Float Charge
When the
acceptance stage is terminated, either
because the charge current ramped down to
the transition point or the timer engaged,
charge current will shut off. The unit monitors
the battery voltage while it drifts down from
the bulk charge voltage limit. When it reaches
the float voltage set point, the float charge
stage is engaged.
The float charge stage holds the battery
voltage at a lower level, where it is safe for
long term battery maintenance. During the
float charge stage, the full output current of
the battery charger is available to operate any
DC appliances that may be on the system,
while constantly maintaining the float charge
voltage.
The battery charger remains in the float
charge stage indefinitely until the charger is
disconnected from incoming AC power or
turned OFF with the Freedom Remote Control
Panel or Link Instrument.
ACCEPTANCE TO FLOAT TRANSITION POINTS
Freedom 10-12V
Freedom 10-24V
Freedom 15-12V
Freedom 20-12V
Freedom 20-24V
Freedom 20-32V
Freedom 25-12V
Freedom 25-24V
Stage 4 -
Equalizing Charge
5 Amps DC
2.5 Amps DC
10 Amps DC
15 Amps DC
7.5 Amps DC
6 Amps DC
21 Amps DC
10 Amps DC
This is the
only battery charger stage which is not
engaged automatically. It must be manually
initiated each time it is necessary to equalize
using a dip switch on the back of the Freedom
Remote Control or the front panel on the Link
Instrumentation. Applying an equalizing
charge is not possible without the use of a
Freedom Remote Panel or Link Instrument.
Periodic equalizing is recommended by
most wet cell deep-cycle battery manufacturers. There are no firm rules for how
often an equalizing charge should be applied,
but once a month is a good rule of thumb for
batteries which are regularly cycled, less often
for systems in only occasional use.
14
Part No. 90-0113-00
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BA TTERY CHARGING
The equalizing charge is a timed, 8-hour
cycle. If desired, it can be ended by interrupting the AC power to the charger at any
time during the cycle. Equalizing should only
be engaged after the batteries have been fully
charged by a normal battery charging cycle.
During this charge cycle, the battery
voltage will increase to the equalize voltage.
This will cause the battery bank to gas
profusely and will accomplish the following:
1. Removal of residual sulfate. Each time a
battery is cycled (discharged and recharged),
a small amount of sulfate is left on the plates.
Over time, this gradual build-up of sulfate will
compromise the performance of the battery.
By applying an equalizing charge, the sulfate
is returned back to the electrolyte, raising the
specific gravity and fully exposing the active
material of the plates.
2. Bring all cells to the same potential. All
lead-acid batteries are made up of individual
2 Volt cells. As the battery bank is cycled,
slight differences in the cells result in different
cell voltages, affecting the overall charge
effectiveness. Equalizing brings all cells up to
the same voltage and the electrolyte in each
cell to the same specific gravity.
3. Mixing up of the electrolyte. Electrolyte in
battery cells tend to separate into layers of
acid and water. The vigorous bubbling action
of the battery during equalizing serves to
physically mix the electrolyte.
Addendum, pages 28-34. If you equalize
using a Link Instrument, refer to the Link
Owner’s Manual for more information.
For more information and precautions,
check the battery manufacturer specifications
and recommendations. Additional information
on equalizing is also available on our Web
site http://www.heartinterface.com.
Charging Over-Discharged Batteries
Charging a battery bank with a terminal
voltage of less than 8 Volts presents a special
problem for the unit. If this situation arises, the
unit will attempt to charge for 1 minute. If the
charger senses excessive ripple voltage, it will
shut down to protect itself.
To successfully charge an overdischarged battery, you must remove as
much DC load as possible and set Power
Sharing to the lowest setting. Refer to the
Freedom Remote Control Panel Addendum
pages 28-34 and Link Owner’s Manual for
more information.
When charging completely dead
batteries, it is helpful to recharge them at
lower current levels. To accomplish this, use
the Power Sharing feature to reduce the
charge current until the battery voltage
reaches a normal level.
For battery voltage settings, refer to the
Battery Charger Voltage Settings chart on
page 17.
Equalizing is not required on gel cell
batteries. For more information on equalizing
using the Freedom Remote Control Panel,
refer to the Freedom Remote Control Panel
Part No. 90-0113-00
Fdmman2.p65 2/98
15
BA TTERY CHARGING
WARNINGS
1. Do not equalize gel cell batteries
with the remote programmed for wet
cells. Check remote default settings.
2. Always monitor the equalize charge.
Provide proper ventilation for battery
fumes. Do not allow any sparks during
equalizing. If one or more cells begin to
overflow, terminate the equalize charge.
3. Check the battery electrolyte both
before and after the equalizing charge.
Do not expose the battery plates to air.
Leave the battery caps on while
equalizing. Top off after equalizing.
4. Remove all loads from the DC
system before equalizing. Some DC
loads may not tolerate the high charge
voltage.
excess of the charge rate is placed on the
battery bank, eventually the battery voltage
will drop below 8 Volts and the battery
charger will shut off. This load must be
significantly reduced and the power to the
charger cycled to resume charging.
Freedom Remote Control Panel while
charging is a warning that an over-discharge
is imminent and that the DC load should be
reduced. Refer to the Freedom Remote
Panel Addendum, page 32.
NOTE: If a continuous DC load in
Blinking of the battery LED on the
5. Do not leave the equalize dip switch
in the ON position on the Freedom
Remote Control Panel. It must be cycled
ON/OFF and left in the OFF position. If
left ON, the unit will engage the
equalizing cycle every time the battery
charger is engaged.
6. With Link Instrumentation, the red
charge LED flashes during the equalizing
cycles. When the equalization cycle is
complete, the charger automatically goes
to float and the green LED is illuminated.
16
Part No. 90-0113-00
Fdmman2.p65 2/98
BA TTERY CHARGER VOL T AGE SETTINGS
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17
INST ALLA TION PRECAUTIONS
CAUTION This equipment is not ignition
protected and employs components that tend
to produce arcs or sparks. To reduce the risk
of fire or explosions, do not install in
compartments containing batteries or
flammable materials or areas in which
ignition-protected equipment is required.
WARNING
For continued protection against risk of
electric shock, use only the ground-fault
circuit interrupter (GFCI) type receptacles
detailed in this manual. Other types may
fail to operate properly when connected
to this inverter, resulting in a potential
shock hazard.
CAUTION To reduce the risk of electric shock
and prevent premature failure due to corrosion, do not mount where exposed to rain,
dripping or spray.
CAUTION To prevent fire, do not obstruct
ventilation openings. Do not mount in a
zero clearance compartment, overheating
may result.
CAUTION
AC & DC voltage sources are terminated
inside this equipment.
be individually opened before servicing.
When solar array is exposed to light, it
supplies a DC voltage to the battery and
this equipment.
Risk of electrical shock. Both
Each circuit must
CAUTION
Risk of electrical shock. Do not
remove cover, no user serviceable parts
inside.
Refer servicing to qualified service
personnel.
BOTTOM VIEW
AC Input**
Chassis
Ground
Lug
*Freedom 20D has 2 AC outputs.
**Freedom 25 has 2 AC inputs.
Typical Tools Needed
Flathead and Phillips Screwdrivers
Wrench or pliers for connecting battery cables
Drill
Wire Cutters
Wire Strippers
Misc. assortment of wire ties and connectors
Accessories Needed to Complete Installation
Fuse as required by NEC. Refer to page 25.
Twisted Pair wire for Link Instrumentation
Electrical wire (10 gauge) for AC wiring
AC Output*
Remote
Jack
18
Part No. 90-0113-00
Fdmman2.p65 2/98
The Freedom Combi is appropriate for
installation in recreational vehicles (RV),
residential solar installations, marine and
other applications. Refer to the separate
installation guide for typical installation
examples and application-specific installation
information.
It is recommended that installation be
completed by an authorized Heart Interface
technical dealer or experienced electrician.
Key Installation Points
The Power Switch must be turned OFF
before you begin.
1. Observe proper polarity when connecting
batteries. Reverse DC polarity will result in
damage to the unit and will void the warranty.
Use care when making the DC connections.
WARNING
The Freedom Series is not DC reverse
polarity protected. Be very careful to
connect the negative and positive cables
correctly, otherwise damage will result
and the warranty will be void.
2. Do not back-feed the AC output of the inverter with incoming AC power. A
back-feed occurs when AC power from shore
power or generator is connected to the output
of the inverter. This will damage the inverter
and void the warranty. Remember that incom-
AC must be fed only to the AC input and
ing
never the AC output. Always check for AC
voltage before connecting wires to the AC output. Do NOT turn the inverter ON until all AC
connections have been made. Back-feeding
the inverter voids the warranty.
INSTALLATION
WARNING
Do not connect incoming AC from any
source to the AC output of the inverter.
This is known as back-feeding and will
damage the unit and void the warranty.
3. Do not connect the AC input to the AC
output. This would be equivalent to plugging
the battery charger into the inverter. This
could occur if the unit’s AC output is connected to the entire leg of a circuit breaker
panel, then a circuit breaker on that leg is
used to feed the battery charger input. This
will cause the unit to oscillate ON and OFF
when the unit is in inverter mode.
4. Always use proper wire and connectors.
The proper battery cable size is critical because considerable amperage flows in the DC
circuit. Fusing the positive DC cables is
required. The AC wire size is dependent on
potential current in the circuit. Consult the
NEC (National Electric Code) for proper wire
gauge.
5. Make sure all wiring conforms to local
and national electrical codes. If in doubt,
consult with a qualified electrician.
6. To meet electrical codes, a fuse must be
installed in the positive battery cable within 18
inches of the battery post. This fuse is
intended to protect the battery and cables
against a dead short circuit. The inverter is
protected internally and will not blow a
properly sized fuse.
Part No. 90-0113-00
Fdmman2.p65 2/98
19
INSTALLATION
7. Keep the inverter/charger out of the
elements and out of direct contact with
water or spray. Failing to do so may result in
premature failure from corrosion and void the
warranty.
WARNING
Do not mount the unit in an enclosed
battery compartment. Take precautions to
keep road dirt and spray off the unit.
8. Mount the unit as close to the batteries
as possible but not in the presence of
flammable fumes or in an enclosed battery
compartment.
9. Keep the overall length of each battery
cable less than 10 feet. If needed, attach
short extension cables. Do not use frame
ground or a ground bonding system as a
current carrying conductor. Run the negative
cable directly to the battery bank. If the
positive and negative cables run parallel to
each other, twist the cables together. This will
minimize the adverse effects of inductance. If
it is absolutely necessary to run cable more
than 10 feet, increase the size of the cable.
11. You may mount the unit horizontally (on
a shelf) or vertically (on a wall or bulkhead).
If mounted vertically, you must orient the unit
so the switch and the circuit breakers are
facing up and the fan and battery cables are
facing down.
12. Allow several inches of clearance
around the unit to permit a supply of fresh air
to the cooling fan. Do not block any of the
vents or louvers. The thermostat controlled
fan pulls air from outside the unit. It blows air
across the internal components, particularly
the transformer and heat sinks, then out the
side vents.
13. If installing in a system which includes an
existing battery charger or converter, make
sure these do not operate from the inverter
output AC power. This sets up a power loop
which, due to inefficiencies, will quickly drain
the batteries.
14. DC wiring is generally very simple, the
positive and negative cables from the inverter/
charger are connected to the house or
auxiliary battery. In the case of multiple
batteries, the interconnecting jumper cables
must be of the same AWG as those supplied
with the inverter/ charger.
10. The connectors for the Freedom
Remote Control, Link Instrument and the
chassis ground bonding lug, as well as for
the AC wires, are located on the bottom of
the unit. Be sure to make these connections
before bolting down the unit.
20
15. If multiple battery banks are to be
charged, a battery selector switch can be
installed, allowing the banks to be charged
either individually or simultaneously. A
solenoid can also be used.
Part No. 90-0113-00
Fdmman2.p65 2/98
INSTALLATION
Grounding
For safety purposes, the chassis of the
inverter/charger must be connected to your
AC ground system. The chassis ground
bonding lug is located on the bottom of the
unit. This connector can accept two wires, the
first is used to connect the unit to AC ground,
the second can be used to connect other AC
equipment to the grounding system.
Use green insulated wire (8 AWG for
Freedom 10 and 6 AWG for Freedom 20, 25),
strip one end and use a screwdriver to secure
it to the chassis ground bonding lug. This wire
will connect to the ground in your AC
electrical system. Make sure the connection is
clean and tight.
This procedure will connect the chassis
of your unit to AC ground. In addition, the AC
input and AC output green wires are
connected to chassis ground. It is important to
connect these wires to the AC ground bus in
the circuit breaker panel.
Some installations require heavier
grounding wire. Conform to local and national
electrical codes. If in doubt, consult a
qualified electrician.
NOTE: Solar Applications: Use a 6
AWG green insulated or bare copper wire,
if no other equipment is grounded through
the unit. If additional equipment is connected to the chassis grounding terminal,
larger wire may be required.
Strip one end of the wire and use a
screwdriver to secure it to the chassis
grounding terminal. This wire will connect
to the equipment ground system either at
the earth ground electrode or at an electrical equipment enclosure ground bonding
terminal. In either case, you must insure
that the ground bonding wire does not become smaller between the Freedom Combi
unit and the earth ground point.
More information on grounding can be
found in the National Electrical Code and
local electrical codes.
Note: The battery cables are not connected to ground or the chassis of the unit.
For detailed installation suggestions,
refer to the separate Installation Guide.
Neutral Bonding
For safety purposes, the Freedom Combi
unit internally bonds the AC ouput neutral
(white) to the AC ground (green), when the
unit is OFF or in the inverter mode. When
incoming AC power is applied and the transfer
switch is engaged, the internal neutral-toground bond is automatically lifted.
Part No. 90-0113-00
Fdmman2.p65 2/98
This means that when AC power
(shorepower) is applied, the grounding
system is connected to the shore power
ground, where neutral and earth ground are
21
INSTALLATION
bonded together. This technique insures
safety in all conditions and conforms to the
requirements of the NEC.
For detailed information, refer to the
separate Installation Guide.
AC Wiring
The AC wires route through the strain
relief holes in the bottom of the unit. Use a
screwdriver to remove the screws which
secure the AC wiring compartment cover
plate. Inside, the compartment is divided into
2 sections, one labeled AC Input, the other
labeled AC Output. Each side contains 3 (6*)
pigtails: black, white and green.
Black. . . . . . . . .Hot or Line
White. . . . . . . . .Neutral
Green. . . . . . . . Ground
Conventional metal strain reliefs are
provided. These can be replaced with plastic
strain reliefs for additional corrosion resistance or 3/4 inch conduit fittings (1/2 inch for
Freedom 10) if the wiring will be routed
through a conduit.
You must use 10 AWG copper wire with
insulation rated for 60 degrees centigrade or
higher for both the AC input and AC output.
WARNING
Do not connect incoming AC from any
source to the AC output of the inverter/
charger. This is known as back-feeding
and will damage the unit and void the
warranty.
*Freedom 25 has 2 AC inputs.
Freedom 20D has 2 AC outputs.
AC Input: Feed the 3 conductor AC
input wire through the strain relief and into the
AC input compartment. You should have 6
inches of individual insulated black, white and
green wire. Strip 1/2 inch of insulation off
each conductor and connect to the pigtails:
Black to Black, White to White, and Green to
Green.
Use the wire nuts provided to make the
wire connections. You may chose to use butt
splices (not included) to make the wire
connections.
NOTE: Freedom 25 Only. There are
two options for configuring the AC input to
the Freedom 25.
Dual Inputs: You may feed the
internal battery charger separately from
the transfer input which feeds the AC
loads. In this case, connect one 30 Amp
feed to the charger pigtails and another 30
Amp feed to the transfer switch input.
The advantage is to balance the AC
loads when 2 legs of incoming AC power
are available. These two feeds can be in
or out of phase. Transfer will only occur
when power is applied to both inputs.
The charger can draw up to 27 Amps on
one leg of power and the transfer switch
can pass up to 30 Amps from the other leg
of power.
Single Input: Feed both the battery
charger and the transfer switch from the
same AC input. In this case you will
connect both pigtails together, Black to
Black, White to White and Green to
Green.
22
Part No. 90-0113-00
Fdmman2.p65 2/98
The advantage is to allow up to 60 Amps
of AC power to be brought in on a single
cable. Up to 30 Amps is available to the
loads, with the balance available to power the
battery charger. A single cable should be
protected by a 60 Amp breaker or smaller,
and 6 gauge wire should be used.
Refer to the Installation Guide for more
information.
AC Output: Feed the 3 conductor AC
output wire through its strain relief and
connect in the same fashion as the AC input
wires.
Tug firmly on each connection to make
sure they are secure. If the unit is not
operating properly, check these connections
first.
INSTALLATION
WARNING
Persons with heart problems or other
conditions which make them susceptible
to electric shock may still be injured by
ground faults on circuits protected by the
GFCI Receptacle. No safety devices yet
designed will protect against all hazards
or carelessly handled or misused
electrical equipment or wiring.
Remote Control Wiring
If installing a remote monitor, complete
the routing of the remote cable before bolting
the unit down. Refer to the Freedom Remote
Control Panel Addendum, page 28-34, or the
Link Owner’s Manual.
Carefully tuck the wires into the AC
wiring compartment. Replace the cover plate.
Ground Fault Circult Interrupters
To conform to the NEC, certain branch
circuits must be equipped with a Ground Fault
Circuit Interrupter (GFCI). Please consult the
code or a qualified electrician for details. Any
such branch circuit must be protected by a
circuit breaker consistent with the GFCI rating.
Underwriters Laboratories has tested the
following GFCI, and its use is recommended.
Receptacle Type:
Pass & Seymour
Catalog Number 1591-RW
Rated: 16 Amps at 120 Volts AC
Part No. 90-0113-00
Fdmman2.p65 2/98
23
INSTALLATION
DC Wiring
Two battery cables are provided with the
unit. Both are black, the
piece of red heat shrink
High current will pass through the DC wiring.
All wires must be properly sized and all
connections clean and tight.
It is recommended that the battery
cables not be lengthened. However, if
necessary, it is possible to extend the cables.
Use proper extension terminals (Heart
Interface part #31-6000-01). Do not bolt the
terminals together and cover with tape.
Extension cables must be 00 AWG (2 AWG
for the Freedom 10), the same type of wire
supplied with the unit, and the total length for
each battery cable
Make sure the connections to the
extension cables are tight and properly
insulated. Do not attempt to open the case
and replace battery cables.
The negative cable should be connected
directly to the negative post of the battery
bank or the ground side of a current shunt.
Tighten securely.
NOTE: If installing in a vehicle, do not
use the vehicle frame as the negative
conductor.
positive cable has a
insulation on the end.
must not exceed 10 feet.
WARNING
Freedom Inverter/Chargers are not
protected against DC reverse polarity. Be
very careful to connect the negative and
positive cables correctly or damage will
result and the warranty will be void.
The positive battery cable (red heat
shrink insulation on the end) must be fused
and connected to the positive post of the
battery bank, or through a selector switch to
one or more battery banks.
A spark may be generated when the final
battery connection is made. This is normal; do
not be alarmed. However, do not make the
final connection in the presence of flammable
fumes.
Battery Cable Fusing
A fuse is required by the NEC to protect
the battery cables. The fuse must be installed
in the positive battery cable, within 18 inches
of the battery.
Refer to the Installation Guide for
installation suggestions.
24
Part No. 90-0113-00
Fdmman2.p65 2/98
INSTALLATION
Recommended Fuse:
Class T JLLN
This
fuse with fuse holder is available from your
dealer or Heart Interface.
COMPRESSION / RING TERMINAL
NUT
LOCK WASHER
INVERTER
CABLE
FLAT WASHER
BATTERY
CABLE
FUSE
For Freedom 10, 15
200 Amp Fuse & Holder PN# 84-4155-00 (C/R)*
200 Amp Fuse & Holder PN# 84-4158-00 (R/R)**
200 Amp Fuse Only PN# 84-4157-00
For Freedom 20, 25
300 Amp Fuse & Holder PN# 84-4156-00 (C/R)*
300 Amp Fuse & Holder PN# 84-4154-00 (R/R)**
300 Amp Fuse Only PN# 84-4151-00
*C/R. . . . . Compression/Ring Terminal
**R/R. . . . . Ring/Ring Terminal
_
+
+ (red)
EXPLODED VIEW
OF FUSE ASSEMBLY
RING / RING TERMINAL
NUT
FUSE HOLDER
WARNING
Improper stack up of hardware will cause
excessive heat and fuse failure. Stack up
as shown.
Part No. 90-0113-00
Fdmman2.p65 2/98
INVERTER
CABLE
LOCK WASHER
FLAT WASHER
BATTERY
CABLE
FUSE
FUSE HOLDER
25
INSTALLATION
Follow these instructions to insure proper
start up and confirm that the installation is
correct.
WARNING
1. Check to make sure the power switch
on the inverter is in the OFF position. If connected to a Freedom Remote Control Panel
or a Link Instrument, make sure the switches
for the inverter and charger are OFF.
2. Check battery polarity. If the unit was
connected to the battery with reverse polarity,
the unit will be damaged. The positive battery
cable has red heat shrink insulation on the
end.
3. Check the battery voltage and ensure
it is within proper range for the unit (10-15
VDC).
Do not apply shore power or generator
power without perfoming the following
steps:
1. Test the inverter function:
• With no loads connected to the ouput of
the inverter, turn ON the power switch on the
inverter. If using a remote, leave the power
switch on the unit OFF and turn ON the
inverter with the switch on the Freedom
Remote Control Panel or Link Instrument.
• The Freedom unit will produce a slight
buzz. If using a Freedom Remote Control
Panel, the INV/CHRG LED will illuminate and
the voltage indicator will display the battery
voltage. The DC Amps LED will not be lit
because the unit is in the idle mode.
• Add a load to the output of the inverter.
An incandescent light bulb will work fine. The
light should come on and the DC Amps LED
will indicate the DC draw from the battery
Do not turn the inverter ON before
eliminating any possibility of backfeed.
through the inverter. Leave the load connected and turn OFF the unit at the power
switch on the Freedom Remote Control Panel
or Link Instrument.
•Turn OFF the unit at the power switch or
on the Freedom Remote Control Panel or Link
Instrument.
2. Test the transfer function:
NOTE: The front panel “Power” switch does
not disconnect DC or AC power to the unit.
• Be sure all the power switches are in the
OFF position. If there is a back-feed in the
installation, the unit will protect itself only if the
switch is turned OFF.
• Apply shore power to the unit. The unit
should transfer shore power and illuminate
the light bulb or power the load with the switch
in the OFF position. If this does not happen,
do not proceed. If you are using a Freedom
Remote Control Panel, check the panel for
back-feed indication. The panel will show an
overload condition and LEDs 1 and 6 will be
lit. Eliminate the back-feed condition.
• If you are not using a Freedom Remote
Control Panel, test for back-feed. Disconnect
from shore power and disconnect the AC
ouput wires on the inverter. Apply shore
power and measure for voltage between the
black and white wires that feed the electrical
panel, not the inverter wires. If there is voltage
on these wires, a back-feed condition exists
26
Part No. 90-0113-00
Fdmman2.p65 2/98
and must be removed or damage will result.
Refer to page 19 for more information or call
Heart Interface.
3. Test the battery charger function:
• With shore power applied and the
transfer switch engaged, the battery charger
should be in operation.
NOTE: The charger will work with the
switch in the OFF position. Verify the charger
is working by using a Volt meter. The battery
voltage gradually increases. If using a
Freedom Remote Control Panel, the DC
Amps LED indicates the current level the
charger is putting out and the DC Volts LED
indicates an increase in battery voltage on the
DC Volts indicator.
• Turn the power switch ON and
disconnect shore power. The inverter should
automatically pick up the load when shore
power is removed.
INSTALLATION
Repeat the test for transfer and battery
charger with the generator if you have one.
Congratulations, you have completed a
successful installation.
Part No. 90-0113-00
Fdmman2.p65 2/98
27
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28
Part No. 90-0113-00
Fdmman2.p65 2/98
Part No. 90-0113-00
Fdmman2.p65 2/98
An optional remote control panel is
available for the Freedom Combi Series. It
offers several features not found on the unit.
The Freedom Remote Control Panel provides
LED bargraphs which show system status,
battery voltage, and current in both inverter
and charge modes. These bargraphs also
display dip switch positions and shut down
conditions.
Remote Power Switch
The switch on the remote is used to
control the inverter and the battery charger
function. When a remote control is used, the
power switch on the inverter should be left in
the OFF position.
System Status LEDs
These 4 LEDs monitor the system as
described in the table on page 33.
DC Volts Bargraph
These LEDs indicate the battery voltage
as measured inside the unit. Each LED
segment indicates .5 Volts (1 Volt*). If an
overload occurs and the unit shuts down, the
DC Volts bargraph will stop indicating battery
voltage and display the dip switch settings. It
will return to indicating battery voltage only
after the unit has been reset.
To review the dip switch settings, cycle
the power switch OFF/ON two times within
one second. This will cause the DC Volts
bargraph to illuminate the corresponding dip
switch settings for 10 seconds. Refer to the
chart on page 33.
NOTE: Freedom 20/32 Volt only. Each
LED on the DC Volts bargraph corresponds to
1.33 Volts.
DC Amps Bargraph
These LEDs approximate DC input
current in inverter mode and DC output
current in battery charger mode. Two ranges
are used -- below 50 (25*) Amps each
segment represents a 10 (5*) Amp increment,
above 50 (25*) Amps each segment
represents a 20 (10*) Amp increment. Above
130 Amps, a flashing LED indicates the value
displayed plus 100 Amps (flashing 50 LED is
equal to 50 + 100 or 150 Amps DC).
REMOTE CONTROL P ANEL ADDENDUM
NOTE: Freedom 20/32 Volt only. Each
LED on the DC Amps bargraph below 14.0
represents a 3.5 Amp increment, above
14.0 represents a 7.0 Amp increment.
Above 49 Amps, the DC Amps
bargraph will display a blinking LED corresponding to that value plus 49. For
example, a blinking 21.0 DC Amps LED
indicates 70 Amps (49.0 + 21.0 = 70.0).
If a shut down occurs, the DC Amps
bargraph will stop indicating DC Amps and will
indicate the type of problem. Each LED
segment indicates a differrent problem as
described in the troubleshooting section on
page 34.
Freedom Remote Panel for 12 Volt units shown.
*24 Volt models.
29
REMOTE CONTROL PANEL
Dip Switches
On the back of the Freedom Remote
Control Panel is a set of 8 dip switches which
are used to make several adjustments. On
the switch block, each switch is numbered. . .
1 through 8 and the ON position is indicated.
The switch settings can be changed at any
time, even while the unit is operating. Following is a discussion of each adjustment. Refer
to the table on page 33 for dip switch programming.
SWITCH #1 -
Manual Equalizing
Cycling this switch ON for 1 second, then
OFF, will initiate an equalizing charge cycle.
The battery charger must be engaged before
cycling the switch. The dip switch must
always be returned to the OFF position. If it
is left ON, an equalizing charge cycle will
initiate every time the charger is engaged this could cause battery damage.
The equalizing cycle is timed to last 8
hours from the time the switch is cycled, at
which point the charger resumes normal
charging in the float stage.
NOTE: If the dip switches are set in one
of the two gel cell positions, the equalizing
charge voltage is the same as the bulk charge
voltage, therefore, equalizing is equivalent to
an 8-hour acceptance stage and is not
harmful.
NOTE: Do not leave the equalize dip
switch in the ON position on the Freedom
Remote Control Panel. It must be cycled
OFF and left in the OFF position. If left ON,
the unit will engage the equalizing cycle every
time the battery charger is engaged.
NOTE: Equalizing gel cell batteries with
the Freedom Remote Control Panel set to gel
type batteries results in the charge voltage
holding at the acceptance voltage for 8
hours. This can be useful for restoring
capacity to cells that have been left in a
deeply discharged state for a long period of
time.
NOTE: Freedom 20 & 25 Only. To limit
the DC current on the Freedom 20 and 25
during equalizing to less than the default setting, turn on dip switches 7 and 8 before
starting the equalizing charge. Do not operate AC loads that are on the output of the
inverter/charger when equalizing.
DC Current Default Settings During Equalize:
Freedom 20 Freedom 25
12 Volts:
24 Volts:
32 Volts:
16 Amps
8 Amps
6 Amps N/A
24 Amps
12 Amps
The battery LED blinks when equalizing.
See page 14 for discussion of the theory and
procedure for battery equalizing.
Equalizing is not required on gel cell
batteries.
30
SWITCH #2 & #3 - Battery Type and
Temperature Gel cell and wet cell batteries
have slightly different charge voltage
requirements. Optimum battery charging is
Part No. 90-0113-00
Fdmman2.p65 2/98
Part No. 90-0113-00
Fdmman2.p65 2/98
REMOTE CONTROL PANEL
To successfully charge an over discharged battery, you must remove as much
DC load as possible. Set dip switches 7 and 8
to the ON position to limit the amount of
charge current and the resulting ripple
voltage. After the battery voltage has reached
10 Volts, these switches can be set to their
previous positions.
Use the 5 Amp Power Sharing setting for
small generators, or for charging deeply
discharged batteries.
temperature dependent. For these reasons,
the dip switches allow four different battery
charger voltage set points, depending on
battery type and ambient temperature:
Cool Wet Cell . . . . < 80 degrees F.
Warm Wet Cell . . . > 80 degrees F.
Cool Gel Cell . . . . .< 80 degrees F.
Warm Gel Cell . . . .> 80 degrees F.
Refer to the table on page 17 for the
specific voltages for each setting.
SWITCH
#4 - Auto Charge
With the switch in
the OFF position, the remote panel ON/OFF
switch only controls the inverter operation.
With the dip switch turned ON, it allows the
power ON/OFF switch on the front of the
remote to control the battery charger as well
as the inverter.
SWITCH #5 & #6 -
Idle Sensitivity
Most
installations will be connected to the electrical
system, which in itself, with no appliances
turned on, represents a small load. Using a
trial and error process, the idle ciruit can be
adjusted until the unit will detect small loads
but still drop into idle mode when all loads are
shut off.
NOTE: Some small loads may not pull
the unit out of idle mode. If this occurs, you
may disable the idle circuit or use an additional load (i.e., a small incandescent light) to
first activate the idle circuitry. You can confirm
the unit is in idle mode by checking the DC
Amps bargraph. The lowest LED goes out
when the unit is in idle mode.
A Volt meter can be used to confirm the
idle condition. Idle mode output voltage will
typically measure between 10 and 55 Volts
with an averaging AC Volt meter. See the
Troubleshooting chart, page 27, for a
discussion of measuring inverter output
voltage with a meter.
SWITCH #7 & #8
- Power Sharing
These switches should be set to match the
value of the circuit breaker which protects the
incoming AC power. They may also limit the
output current from the battery charger.
31
System DC
Current Consumption vs Idle Mode
Normal Idle
Idle Circuit Disabled
Unit Shut Off
Idle Mode
With Remote Without Remote
181 mA
120 mA
496 mA N/A
16 mA 7 mA
REMOTE CONTROL PANEL
NOTE: Freedom 25 only. If feeding both
inputs with one 30 Amp breaker, set Power
Sharing to 30 Amps.
Dip Switch Status
You can check the position of the dip
switches by quickly cycling the power switch
OFF/ON twice. The DC Volts bargraph will
cease to display battery voltage and will indicate the settings of each dip switch. In this
mode the bottom LED will illuminate if switch
1 is ON; the second LED will illuminate if
switch 2 is ON, etc. Dip switch settings are
indicated for 10 seconds after which time the
display returns to indicating battery voltage.
Factory default settings for all dip
switches are in the OFF position.
Remote Control Wiring
The Freedom Remote Control Panel is
supplied with 25 or 50 feet of telephone cable
for connection to the unit. Simply plug one
end of the cable into the remote connector on
the bottom of the inverter/charger labeled
“Remote” and the other end into the
connector on the back of the Freedom
Remote Control Panel.
Routing the remote cable away from AC
and DC wires will minimize the potential for
interference which may affect the LED
bargraphs.
The remote control cable can be
extended up to 50 feet if required. Use
standard 4 or 6 conductor telephone cable.
Use a single length cable with no connnectors
or in-line splices. If phone cable is left over,
wrap excess wire in a figure 8 configuration
and store it in an area away from AC
equipment to prevent electrical interference.
32
Once the above steps have been
completed, the unit can be bolted down.
Refer to page 33 for the Dip Switch
Programming chart.
Part No. 90-0113-00
Fdmman2.p65 2/98
REMOTE CONTROL PANEL STA TUS LEDs
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Part No. 90-0113-00
Fdmman2.p65 2/98
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33
REMOTE CONTROL PANEL
DIP SWITCH PROGRAMMING:
Feature
Equalize or
3-Stage
Charging
Battery Type
Auto Charge
Idle
Sensitivity
Switch Number Set Point
1
T oggle
On/Off
Off
2
On
Off
On
Off
4
On
Off
5
On
Off
Equalize (Do not leave ON)
3-Stage Charging*
3
On
On
Off
Off
6
On
On
Warm Gel Cell (> 80 deg. F.)
Cool Gel Cell (< 80 deg. F .)
Warm Wet Cell (> 80 deg. F.)
Cool Wet Cell (< 80 deg. F .)*
Disable: Charger responds to ON/OFF switch.
Enable: Charger ON when AC connected.*
Idle Disabled
15 Watts
34
On
Off
7
Power
Sharing
*Indicates factory default setting.
On
Off
On
Off
Off
Off
On
On
Off
Off
6 Watts
4 Watts*
8
FDM 10 FDM 20 FDM 25
5 Amps
15 Amps
20 Amps
30 Amps*
5 Amps
15 Amps
20 Amps
30 Amps*
5 Amps
20 Amps
30 Amps
Disabled*
Part No. 90-0113-00
Fdmman2.p65 2/98
WITH THE FREEDOM REMOTE
TROUBLESHOOTING
Use this chart when the overload LED is blinking indicating an overload condition has
occurred. LEDs are numbered counting from the bottom up.
CONTROL PANEL DC AMPS BARGRAPH
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Part No. 90-0113-00
Fdmman2.p65 2/98
35
GLOSSARY
Alternating Current (AC) An electric current
that reverses direction at regular intervals.
Sources of alternating current are shore
power, generator power, inverter power or
household current.
Ampere (Amp, A) The unit of measure of
electron flow rate of current through a circuit.
Ampere-hour (Amp-Hr., AH) A unit of
measure for a battery’s electrical storage
capacity, obtained by multiplying the current in
amperes by the time in hours of discharge
(Example: a battery which delivers 5 amperes
for 20 hours delivers 5 amperes times 20
hours, or 100 Amp-Hr. of capacity.)
AH Capacity The ability of a fully charged
battery to deliver a specified quantity of
electricity (Amp-Hr., AH) at a given rate (Amp,
A) over a definite period of time (Hr.). The
capacity of a battery depends upon a number
of factors such as: active material, weight,
density, adhesion to grid, number, design and
dimensions of plates, plate spacing design of
separators, specific gravity and quantity of
available electrolyte, grid alloys, final limiting
voltage, discharge rate, temperature, internal
and external resistance, age and life of the
battery (bank).
the first to the positive of the second, negative
of the second to the positive of the third, etc.
If two 6 Volt batteries of 50 ampere-hours
capacity are connected in series, the circuit
voltage is equal to the sum of the two battery
voltages, or 12 Volts, and the ampere-hour
capacity of the combination is 50
ampere-hours.
Circuit (Parallel) A circuit which provides
more than one path for current flow. A parallel
arrangement of batteries (of like voltage and
capacity) would have all positive terminals
connected to a conductor and all negative
terminals connected to another conductor. If
two 12 Volt batteries of 50 ampere-hour
capacity each are connected in parallel, the
circuit voltage is 12 Volts, and the
ampere-hour capacity of the combination is
100 ampere-hours.
Combi Freedom Combi
Heart Interface to indicate a combination
inverter/charger.
Current The rate of flow of electricity or the
movement rate of electrons along a
conductor. It is comparable to the flow of a
stream of water. The unit of measure for
current is ampere.
is a trademark of
TM
AGM (Absorbed Glass Mat) Battery A lead
acid, maintenance-free battery.
AWG (American Wire Gauge) A standard
used to measure the size of wire.
Circuit An electric circuit is the path of an
electric current. A closed circuit has a
complete path. An open circuit has a broken
or disconnected path.
Circuit (Series) A circuit which has only one
path for the current to flow. Batteries arranged
in series are connected with the negative of
36
Cycle In a battery, one discharge plus one
recharge equals one cycle.
Dip Switch A series of small switches used
for special programming of the Freedom
Combi. These switches are located on the
back of the Freedom Remote Control Panel.
Direct Current (DC) Current that flows
continuously in one direction such as that
from batteries, photovoltaics, alternators,
chargers and DC generators.
Part No. 90-0113-00
Fdmman2.p65 2/98
GLOSSARY
Equalize Charge A controlled overcharge of
the batteries which brings all cells up to the
same voltage potential, extends the battery
life, restores capacity and mixes the
electrolyte. This can only be done using the
Freedom Remote Control Panel or a Link
Instrument.
Gel Cell Battery A type of battery that uses a
gelled electrolyte solution. These batteries are
sealed and are virtually maintenance-free. Not
all sealed batteries are the gel cell type.
GFCI (Ground Fault Circuit Interrupter) A
protective device that rapidly de-energizes a
circuit when current to ground exceeds a
predetermined value.
Ground The reference potential of a circuit. In
automotive use, the result of attaching one
battery cable to the body or frame which is
used as a path for completing a circuit in lieu
of a direct wire from a component. This
method is not suitable for connecting the
negative cable of the inverter to ground.
Instead, route the cable directly to the
negative terminal of the battery.
LED (Light Emitting Diode) Indicator light.
NEC National Electric Code
discharge.
Ohm A unit for measuring electrical
resistance.
Ohm’s Law Expresses the relationship
between Voltage (V) and Current (I) in an
electrical circuit with resistance (R). It can be
expressed as follows: V=IR. If any two of the
three values are known, the third value can
be calculated by using the above formula.
Positive Designating or pertaining to electrical
potential; opposite of negative. The positive
battery terminal is the point where electrons
return to the battery during discharge.
Power Sharing The feature of the charger to
reduce its output when the AC power being
consumed by the charger and external AC
loads connected to the output of the inverter
are in excess of the input breaker rating.
Universal Combi
charger that accepts 120 VAC 60 Hz or 230
VAC 50 Hz for charging.
Volt The unit of measure for electric potential.
Watt The unit for measuring electrical power,
i.e., the rate of doing work, in moving
electrons by or against an electric potential.
Combination inverter/
TM
Negative Designating or pertaining to
electrical potential. The negative terminal is
the point from which electrons flow during
Part No. 90-0113-00
Fdmman2.p65 2/98
Watt-Hour (Watt-HR, WH) The unit for
measuring electrical energy which equals
Watts x Hours.
Wet Cell Battery A type of battery that uses
liquid as an electrolyte. The wet cell battery
requires periodic maintenance; cleaning the
connections, checking the electrolyte level
and performing an equalization cycle.
37
SPECIFICATIONS
FREEDOM 10
MODEL
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tuotuCyrettaBwoLCDV0.01CDV0.02CDV0.01CDV0.02CDV7.62CDV0.01CDV0.02
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UL Listed, C-UL Listed for residential photovoltaic systems and land vehicles. *Adjustable setting with the optional Freedom
Remote Control Panel or Link Instrumentation. **Not evaluated by UL for surge rating. ***Freedom 20D has the same
specifications as the Freedom 20.
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38
Part No. 90-0113-00
Fdmman2.p65 2/98
Part No. 90-0113-00
Fdmman2.p65 2/98
39
SPECIFICATIONS
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MODEL
FREEDOM 15
UL Listed, C-UL Listed for residential photovoltaic systems and land vehicles. *Adjustable setting with the optional Freedom
Remote Control Panel or Link Instrumentation. **Not evaluated by UL for surge rating.
WARRANTY
Your Heart Interface Freedom Combi
TM
Inverter/Charger is under limited warranty
for either 12 (commercial) or 30 months
from date of purchase.
Terms of the warranty are detailed on
the warranty registration card. Please
complete this card and return it to Heart
Interface to register your warranty.
If the unit requires service, contact
Heart Interface by telephone. The service
technician will ask for the serial number of
your unit. Please have this information
ready.
Phone numbers: (253) 872-7225
(800) 446-6180
A return authorization number will be
required on all returns. This number is issued
by the service technician and should be
written on the packaging.
You must ship the unit to Heart Interface
or a field service center freight prepaid.
Inverter/Chargers
© 1997 Heart Interface Corporation. All rights reserved.
Heart Interface Corporation
21440 68th Ave. S.
Kent WA 98032-2416
(253) 872-7225
Fax (253) 872-3412
Toll Free (800) 446-6180
http://www.heartinterface.com
Part No. 90-0113-00
Fdmman2.p65 2/98
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