Thomas Betts 20 User Manual

OWNER’S MANUAL  
FREEDOM 458 Series COMBI  
TM  
INVERTER/CHARGER  
MODEL 15  
MODEL 15D Part No. 81-1520-12  
MODEL 20 Part No. 81-2010-12  
MODEL 20D Part No. 81-2020-12  
Part No. 81-1510-12  
INFORMATION IN THIS MANUAL IS SUBJECT TO CHANGE WITHOUT NOTICE  
®
A Valley Forge Company  
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Part No. 90-0123-00  
Libertycombi.p65 10/26/98  
TABLE OF CONTENTS  
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . 4 Troubleshooting . . . . . . . . . . . . . . . . . . . . .31  
LED Fault Status  
Things to Check  
Things You Should Know . . . . . . . . . . . . . 5  
Circuit Breaker Protection  
Thermostat Controlled Cooling  
Inverter Idle Circuit  
Low and High Battery Shutdown  
Power Sharing  
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . .33  
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 35  
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36  
Temperature Sensitive Charging  
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Optional Remote Control Panels . . . . . . . . .10  
Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Battery Types  
Battery Interconnection  
Battery Bank Ratings and Sizing  
Battery Charging. . . . . . . . . . . . . . . . . . . . 15  
Freedom Battery Chargers  
Battery Charger Voltage Table . . . . . . . . .20  
Installation Precautions . . . . . . . . . . . . . . 21  
Installation . . . . . . . . . . . . . . . . . . . . . . . . . 22  
Key Installation Points  
Grounding  
Neutral Bonding  
AC Wiring  
AC Input  
AC Output  
Ground Fault Circuit Interrupters  
Remote Control Wiring  
TSC Temperature Senstive Charging  
DC Wiring  
Battery Cable Fusing  
Power ON Checks  
Not recommended for use in marine environment  
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INTRODUCTION  
This owner’s manual describes the  
Freedom 458 Series CombiTM Inverter/  
Chargers from Heart Interface. These units  
perform three distinct functions:  
power through directly to the loads. When the  
external AC power source is disconnected, the  
transfer switch allows automatic switching  
back to the inverter.  
1. DC to AC power inverting.  
The Freedom Inverter/Charger operates  
as a self-contained backup power system, just  
add batteries.  
2. Automatic transfer switching between  
inverter power and incoming AC power.  
3. Automatic 3-Stage Battery charging plus  
manual battery equalizing.  
• Freedom battery chargers are electronically  
controlled and rated at a maximum output  
current:  
• 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  
Freedom 20 & 20D  
75 Amps DC  
100 Amps DC  
Freedom 15 & 15D  
Freedom 20 & 20D  
1500 watts  
2000 watts  
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.  
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.  
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  
• The internal transfer switch allows the  
Freedom Inverter/Charger to be connected to  
an external AC source and transfer the source  
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  
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THINGS YOU SHOULD KNOW  
Circuit Breaker Protection  
Thermostat Controlled Cooling  
The Freedom Inverter/Charger is  
supplemental breaker protected. The  
INVERT/CHARGE breaker on the front of the  
Freedom Inverter/Chargers are equipped  
with a thermostatically-controlled fan that cools  
the unit so it can operate continually at its rated  
unit protects against sustained inverter/charger output.  
over current conditions.  
Inverter Idle Circuit  
This automatic energy saving feature  
protects the incoming AC circuit. The incoming reduces battery power consumption when no  
The 30 Ampere AC INPUT circuit breaker  
AC circuit provides power to the battery  
charger and its power is transfered to the  
loads connected to the inverter AC output.  
These breakers are reset by pushing the  
button back in.  
AC load is present. Response from idle is  
instantaneous. In most cases, the operation of  
the idle circuit is not noticeable. Use of the  
Remote Control Panel or Link Instrumentation  
allows the idle threshold to be adjusted. The  
unit does not put out 120 volts when in idle. To  
bring the unit out of the idle condition, apply a  
load.  
The output circuit breakers protect the  
output AC circuits. Models are available with  
one or two outputs. Note: The integral circuit  
breakers provided for AC outputs 1 and 2 are  
not suitable for branch circuit protection. To  
comply with NEC, additional branch circuit  
rated breakers should be used to power the  
loads.  
Low and High Battery Shutdown  
When in inverter mode, if the battery  
voltage drops to 10.0 volts, the inverter will  
automatically shut off. Charge the batteries to  
13.5 volts to automatically resume operation.  
Voltage shut down also occurs for a high  
battery condition at 15.5 volts. Operation will  
resume automatically when the battery voltage  
drops below 15.5 volts. Check all DC sources  
on the system for the reason for the excessive  
voltage.  
Circuit Breaker Protection  
INPUT INV/CHG  
OUT 2  
N/A  
20  
OUT 1  
20  
15  
30  
30  
30  
30  
20  
20  
25  
25  
15D  
20  
15  
N/A  
20  
25  
Power Sharing  
When connected to an external AC  
source the battery charger and transfer  
functions are engaged. A unique Power  
Sharing feature automatically reduces the AC  
power consumption of the battery charger  
allowing necessary AC power to go to the load.  
This prevents the source AC INPUT circuit  
breaker from tripping within the specified rating  
of the AC circuit breaker.  
20D  
15  
Freedom 20D  
INPUT  
The Power Sharing set point of each unit  
has a factory default setting. This can be  
changed using the Remote Control Panel or  
Link Instrumentation.  
INVERT/CHARGE  
OUT 1  
OUT 2  
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THINGS YOU SHOULD KNOW  
Temperature Sensitive Charging  
When the supplied battery temperature  
sensor is connected to the unit and the  
batteries, the charge voltage is controlled  
based on battery temperature. The charger  
adjusts the charge voltage to the best level,  
minimizing water loss in wet cell batteries.  
Charge voltage regulation optimizes the battery  
life cycle.  
TSC Sensor  
Battery  
Freedom 20D  
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OPERATION  
• Battery type setup. To enter the battery  
type select mode, press and hold the INVERT  
switch for five seconds. The status LEDs will  
change from indicating status information to  
indicating battery type. The selection of the  
battery type is made with the Charge switch.  
The Freedom Inverter/Charger provides  
120 volt AC power from auxiliary DC batteries,  
automatic battery charging and automatic AC  
transfer switching between an external AC  
source and inverter mode.  
External AC Power  
Turning the INVERT OFF will reduce  
battery power consumption to a very low level.  
This is recommended if the unit will not be  
used for an extended period of time.  
When external AC power is available, the  
3-stage battery charger, transfer switching,  
and Power Sharing automatically function.  
When external AC power is not available  
and the INVERT switch is ON (either through  
the auxiliary switch or the INVERT button on  
the remote), the inverter will automatically turn  
ON. If the INVERT switch is OFF (the INVERT  
LED will not be illuminated), the inverter will be  
OFF.  
CHARGE MODE  
The CHARGE push-button switch has  
two functions:  
Turn the charger ON and OFF  
If external AC is present, pressing the  
CHARGE switch will turn the charger ON.  
The green CHARGE LED will be ON when the  
charger is charging. When the charger is ON,  
pressing this switch will turn the charger OFF.  
Select the battery type After holding  
the INVERT switch for 5 seconds, press the  
CHARGE switch to select the battery type.  
One of the four LEDs will rapidly blink  
indicating the present battery type setting.  
Press the CHARGE switch again to change  
the battery type. Continue to press until the  
desired battery type is selected. If the  
If installed with the Remote Control Panel  
or Link Instrumentation, the unit will be set up  
and controlled from the remote. Refer to the  
remote manual for more information.  
Front Panel Controls and Indicators  
INVERT MODE  
The INVERT push-button switch is  
located on the front of the unit and has two  
functions:  
• Turn the inverter ON/OFF and reset after  
a fault condition. Pressing the INVERT switch  
turns the inverter ON. The green INVERT LED  
will be ON when the inverter is inverting.  
When the inverter is ON, pressing the INVERT  
switch turns the inverter OFF.  
CHARGE switch is not pressed for 5 seconds,  
the unit will return to normal operation and the  
battery type selection will have been made.  
When the 12 volt input to the unit is  
disconnected, the battery type setting is stored  
in non-volatile memory. When the unit is  
reconnected, the battery type selection  
conveniently returns to the setting.  
INVERT  
CHARGE  
Freedom 20D (Dual Output)  
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OPERATION  
STATUS LEDs  
NOTE: When AC power is available, the  
Each Status LED performs two functions, default setting for the charger is ON. If the unit  
providing battery type selection and operation  
status.  
was manually turned OFF and AC power is in-  
terrupted and becomes available again, the  
charger will return to ON.  
Status LEDs  
LOW BATTERY - Red LED  
CHARGE  
INVERT  
TSC  
REMOTE  
When the LED is OFF the battery  
voltage is normal, between 10.5 and 15.0  
volts DC.  
OVERTEMP  
OVERLOAD / AGM  
LOW BATTERY / GEL 2  
CHARGE / GEL1  
INVERT/WET  
• When the LED is solid red, it indicates a  
battery warning condition, the battery voltage is  
below 10.5 volts DC or above 15.0 volts DC.  
Battery Type Selection  
After holding the INVERT button down for  
5 seconds, use the CHARGE button to select  
battery type :  
• When the LED is blinking slowly, (1 time  
per second), a battery shutdown has occurred.  
The voltage is either below 10.0 volts DC or  
above 15.5 volts DC.  
WET GEL 1  
GEL 2 AGM  
• When the LED is blinking rapidly (5  
times per second), a potential problem in the  
DC system has been detected. Check your  
batteries, battery cables and DC loads.  
Operation Status  
INVERT - Green LED  
• When the LED is solid green, the unit is  
in invert mode. This occurs by pressing the  
INVERT switch.  
OVERTEMP/OVERLOAD - Red LED  
When the LED is Off operation is  
normal.  
• When the LED is blinking slowly (1 time  
per second), the inverter is in standby with AC  
power applied and the transfer switch engaged  
• When the LED is red, there is an over  
temp or overload condition. Check for  
excessive loads or short circuit on the output  
of the inverter. Correct the condition and restart  
by pushing the INVERT switch.  
• When the LED is OFF, the inverter is  
OFF.  
CHARGE - Green LED  
• When the LED is solid green, the unit is  
in the charge mode and external AC power is  
being supplied.  
• When the LED is blinking slowly (1 time  
per second), an over current condition or a  
short circuit has occured. The system has  
shut OFF and will not automatically restart.  
Correct the fault condition and manually restart  
the system.  
• When the LED is blinking slowly, (1 time  
per second) the charger is ready, but external  
AC power is not available.  
• When the LED is OFF, the charger has  
been manually turned OFF. This can only be  
accomplished while AC power is being  
supplied.  
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OPERATION  
LOW BATTERY & OVERTEMP/OVERLOAD  
- Red LEDs  
Overtemp  
• When both LEDs are blinking, an AC  
backfeed has been detected. A backfeed  
occurs when AC power from an external  
source is connected to the output of the  
inverter. Inspect wiring for possible input/output  
wiring error. This condition will damage the unit  
and must be corrected before further  
operation.  
Low  
Battery  
TSC  
Auxiliary Port  
Remote  
TSC (Temperature Sensitive Charging)  
This provides for the connection of a  
sensor to measure battery temperature for  
compensated charging. If no sensor is  
connected the charge voltage levels are set to  
defaults based on battery type.  
Freedom 20D  
OPTIONAL REMOTES  
If using one of the remotes, refer to the  
installation instructions included with the  
remote.  
Note: When a Remote Control Panel or  
Link is installed, the jumper included in the  
parts plastic bag is not used in the Auxiliary  
Switch Port (AUX SWITCH) on the front panel  
of the inverter/charger. See page 23 for more  
details.  
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OPTIONAL REMOTE CONTROL PANELS  
LINK 2000  
The Link 2000 has the same features as  
Remote Control Panel  
An optional remote control panel is  
the Link 1000, providing inverter/charger  
control and complete battery state-of-charge  
information. It monitors two battery banks.  
available. The LED bargraphs on the remote  
control panel shows battery voltage and DC  
current in both inverter and charger modes.  
LINK 2000  
Easy to see red, yellow and green LEDs  
show the battery state-of-charge. Power  
Sharing, charger ON/OFF, inverter ON/OFF  
controls are provided. Set up features include  
selection of Idle Threshold, Battery Type and  
Battery Capacity.  
LINK 2000R  
The Link 2000R adds the ability to  
regulate an engine-driven alternator. The  
precision regulator in the LINK 2000R allows  
the alternator to be controlled as a 3-stage  
battery charging system.  
Remote Control Panel  
If Link Instrument is used to control the  
inverter/charger, refer to the Link Owner’s  
Manual for setup and control information.  
Advanced Remote Control Panels  
Link Instrument  
Advanced remote control panels are also  
available: the Link 1000, 2000 and 2000R.  
Refer to the Remote Control Panel  
or LINK Owner’s Manual for  
LINK 1000  
Link 1000 controls the Freedom Inverter/  
Charger and provides complete battery  
state-of-charge information including DC  
voltage, current, Amp-hours consumed, Time  
Remaining and historical data for a single  
battery bank.  
installation and operation instructions  
The jumper is not installed in the AUX  
Switch Port on the front panel of the  
inverter when the Remote Control Panel  
or Link Instrument is used. See page 23  
for more details.  
LINK 1000  
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BATTERIES  
Wet cell 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.  
Follow the battery manufacturer’s  
recommendations for maintenance.  
Never allow the top of the battery plates to  
be exposed to air, as contamination of the cell  
will result. Keep the top of batteries clean.  
Always provide adequate ventilation for the  
battery storage compartment.  
Do not use ordinary car batteries or  
engine starting batteries 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 type batteries, suitable for  
either engine starting or deep-cycle  
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 internal plates  
that are alloyed with antimony.  
applications, are a compromise and will have  
limited life if deeply discharged.  
Common 12 volt marine/RV deep-cycle  
batteries are acceptable. Golf cart  
batteries perform well and may have a  
longer life. These 6 volt batteries must be  
used in series connected in pairs. High  
quality deep-cycle batteries offer good  
performance and are available in a wide  
variety of sizes.  
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BATTERIES  
Beware of so-called maintenance-free Series  
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 AGM  
batteries, they will not hold up well to deep  
discharging and repeated cycling.  
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.  
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-Discharge Rate  
• Low Internal Resistance  
+
Even though gel cells are sealed  
batteries, the battery compartment should still  
be ventilated.  
Series  
Advanced AGM (Absorbed Glass Mat)  
Batteries  
Series Increase Voltage  
This battery is lead acid but maintenance-  
free. The performance is similar to gel cell  
batteries. The charge parameters are similar  
to wet cell batteries.  
+
+
+
6V  
6V  
12V INVERTER  
_
_
_
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)  
and sized to match your power requirements.  
EACH BATTERY  
CAPACITY:  
220  
AMP-HOURS  
@ 6 VDC  
TOTAL BATTERY  
BANK CAPACITY:  
220  
AMP-HOURS  
@ 12 VDC  
BATTERY INTERCONNECTION  
In most cases, you will be using a bank of  
two or more batteries with your inverter/  
charger. You may connect batteries together in  
two configurations, series and parallel  
depending on their voltage.  
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BATTERIES  
Parallel  
Connecting two batteries in parallel will  
Note: It is not advisable to connect  
batteries of different case sizes or Amp-hour  
ratings in the same battery bank.  
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.  
Always use properly sized wire and  
terminals for your interconnecting battery  
cables. For size information refer to NEC  
requirements or contact your local  
electrician.  
+
+
BATTERY BANK RATINGS AND SIZING  
Deep-cycle batteries are usually rated in  
Amp-hours. The Amp-hour rating is based on  
a 20-hour discharge rate, 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 de-  
creased. For example, if the load is increased  
to 100 Amps, only about 45 Amp-hours will be  
available at this rate of discharge.  
Parallel  
Parallel Increase Amp-hour Capacity  
Deep-cycle batteries can be discharged  
about 80% of capacity before damage occurs.  
Shallow cycling will result in much longer  
battery life. Calculating a battery bank size  
based on 50% discharge cycling is generally  
considered to be a good compromise between  
long battery life and size.  
+
12V  
+
+
12V  
1
2VINVERTER  
_
_
_
EACH BATTERY  
CAPACITY:  
105  
TOTAL BATTERY  
BANK CAPACITY:  
210  
AMP-HOURS  
@ 12 VDC  
AMP-HOURS  
@ 12 VDC  
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.  
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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.  
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.  
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  
In all formulas, 1.1 is the correction factor for  
inverter efficiency.  
Typical Power Consumptlon  
The chart identifies typical power  
consumption for common AC loads. Use it as  
a guide when identifying your power  
requirements.  
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.  
Many electric motors have  
momentary starting require-  
ments well above their opera-  
tional rating. Start up watts are  
listed where appropriate.  
Typical Power Consumption  
Appliance Run Times / Amp Hours  
Typical  
Appliance  
Wattage  
Individual styles and brands of  
appliances may vary.  
5 Min. 15 Min. 30 Min. 1 Hr.  
2 Hr.  
8
3 Hr.  
12  
8 Hr.  
32  
24 Hr.  
96  
13" Color TV  
19" Color TV  
VCR  
50  
100  
50  
.33  
.66  
.33  
.66  
2
1
2
2
4
4
8
4
8
16  
8
24  
64  
192  
96  
If using the same battery  
bank for the inverter and other  
DC loads, be sure to consider  
the power consumption of the  
DC loads when sizing the  
battery bank.  
1
2
12  
32  
Lamp  
100  
300  
50  
2
4
16  
24  
64  
192  
Blender  
6
12  
2
Laptop Computer  
Curling Iron  
.33  
.33  
3.3  
1
4
8
50  
1
2
3/8 Power Drill  
Icemaker*  
500  
200  
1000  
150  
750  
750  
1500  
1100  
10  
20  
2.6  
40  
2
5.2  
80  
4
10.4  
160  
8
15.6  
41.6  
83.2  
Coffee Maker  
3 cu' Refrigerator*  
20 cu' Refrigerator*  
Compact Microwave  
Full Size Microwave  
Vacuum  
6.6  
20  
12  
32  
96  
21  
30  
60  
44  
42  
60  
120  
88  
84  
126  
180  
360  
264  
336  
672  
5
15  
30  
22  
120  
240  
176  
10  
7.3  
NOTE Certain laser printers, breadmakers,  
digital clocks and appliance/tool chargers  
Number in each box represents the total Amp hours used (@ 12 volt DC) based on various continuous run times.  
*Note refrigeration is typically calculated using a 1/3-duty cyle.  
may not operate on modified sine wave.  
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BATTERY CHARGING  
Freedom Battery Chargers  
Battery Charging  
Completely charging wet cell deep-cycle  
Freedom battery chargers are designed  
to overcome the limitations of conventional  
chargers by utilizing 3 distinct charge stages,  
each designed for optimal charging of wet, gel  
cell and AGM deep-cycle batteries. Battery  
type selection is made on the front panel of the  
inverter/charger or through the Remote Control  
Panel or a Link Instrumentation. For more  
information on battery type selection, see page  
7 or refer to the Remote Control Panel manual.  
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.  
AGM and 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.  
15  
Part No. 90-0123-00  
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BATTERY CHARGING  
NOTE: Freedom battery chargers are ON  
whenever AC power is connected to the  
charger input. The charger can be turned OFF  
using the CHARGE switch on the front of the  
unit. This sequence will occur each time  
external AC power is available. The charger  
can be turned ON/OFF using the Remote  
Control Panel or Link Instrumentation.  
The battery charger stages are:  
Stage 1 - Bulk Charge During the bulk  
charge stage most of the energy that has been  
consumed during discharge is returned 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.  
Each time the battery charger is engaged,  
the 3-stage charger proceeds automatically,  
resulting in an efficient complete charge and  
safe battery maintenance. Use of the Remote  
Control Panel or Link Instrument provides the  
ability to periodically apply an equalizing  
charge.  
Generally, a wet cell battery bank should  
not be charged at a rate which exceeds 25% of  
its capacity.  
Refer to Remote Control Panel or the  
Link Instrument Owner’s Manual for more  
information.  
16  
Part No. 90-0123-00  
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BATTERY CHARGING  
The float charge stage holds the battery  
voltage constant at a preset 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.  
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 battery charger remains in the float  
charge stage indefinitely until the charger is  
disconnected from incoming AC power or  
turned OFF on the unit or with the Remote  
Control Panel or Link Instrumentation.  
The acceptance stage lasts until the  
charge current reaches the transition point. A  
timer will terminate the acceptance stage if this  
current level is not reached.  
Stage 4 - Equalizing Charge This is the  
only battery charger stage which is not  
engaged automatically. It must be manually  
initiated each time. Applying an equalizing  
charge is possible only with a Remote Control  
Panel or Link Instrument.  
ACCEPTANCE TO FLOAT TRANSITION POINTS  
Freedom 15 & 15D  
Freedom 20 & 20D  
10 Ampere DC  
15 Ampere DC  
Periodic equalizing is recommended by  
most wet cell deep-cycle battery manu-  
facturers. There are no firm rules for how  
often an equalizing charge should be applied.  
Follow the battery manufacturer’s recommen-  
dations for equalizing.  
Maximum acceptance time is 1 hour for  
wet and AGM 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: The acceptance stage timer is 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, the  
charge current will shut off. The unit monitors  
the battery voltage while it drifts down from the  
acceptance charge voltage limit. When it  
reaches the float voltage set point, the float  
charge stage is engaged.  
17  
Part No. 90-0123-00  
Libertycombi.p65 10/26/98  
BATTERY CHARGING  
The equalizing charge is a timed, 8-hour  
cycle. The cycle can be ended early by inter-  
rupting 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 equalizing stage, 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 charged), 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 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. Refer to the Remote  
Control Panel and Link Owner’s Manuals for  
additional cautions on equalizing.  
Note: Do not equalize gel cell batteries.  
18  
Part No. 90-0123-00  
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BATTERY CHARGING  
WARNINGS  
1. Do not equalize gel cell batteries.  
Check remote default settings.  
2. Always monitor the equalize charge  
cycle. Provide proper ventilation for  
battery fumes. Do not allow any sparks  
during equalizing. If one or more cells  
begin to overflow, terminate the equalize  
cycle.  
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.  
5. With the Remote Control Panel the  
battery state-of-charge LEDs sequence  
during equalizing. When the equalization  
cycle is complete, the charge automati-  
cally goes to float and the green float LED  
battery status light is on. With Link  
Instrumentation, the red charge LED  
flashes during the equalizing cycle. When  
the equalization cycle is complete, the  
charger automatically goes to float and the  
green float LED is illuminated.  
19  
Part No. 90-0123-00  
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BATTERY CHARGER VOLTAGE SETTINGS  
TEMP  
TYPE 0  
TYPE 1  
Gel 1 *  
TYPE 2  
Gel 2 *  
TYPE 3  
AGM  
Wet Cell  
°F  
120  
110  
100  
90  
°C ACCEPT FLOAT ACCEPT FLOAT ACCEPT FLOAT ACCEPT FLOAT  
49  
43  
38  
32  
27  
12.5  
13.6  
13.8  
14.0  
14.2  
14.4  
14.6  
14.8  
15.0  
15.2  
12.5  
12.7  
12.9  
13.1  
13.3  
13.5  
13.7  
13.9  
14.1  
14.3  
13.0  
13.5  
13.7  
13.8  
14.0  
14.1  
14.3  
14.4  
14.6  
14.7  
13.0  
13.0  
13.2  
13.3  
13.5  
13.6  
13.8  
13.9  
14.1  
14.2  
13.0  
14.0  
14.1  
14.2  
14.3  
14.4  
14.5  
14.6  
14.7  
14.8  
13.0  
13.4  
13.5  
13.6  
13.7  
13.8  
13.9  
14.0  
14.1  
14.2  
12.9  
13.9  
14.0  
14.1  
14.2  
14.3  
14.4  
14.5  
14.6  
14.7  
12.9  
12.9  
13.0  
13.1  
13.2  
13.3  
13.4  
13.5  
13.6  
13.7  
80  
70 ** 21 **  
60  
50  
40  
30  
16  
10  
5
-1  
* There are two gel battery settings. Check with the battery manufacturer to determine the  
proper setting for your batteries. Usually, Gel 1 is for long battery life; Gel 2 is for rapid charging.  
**Default setting when the temperature sensor is not connected.  
20  
Part No. 90-0123-00  
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INSTALLATION PRECAUTIONS  
Confirm that your shipping carton contains:  
CAUTION This equipment is not ignition  
protected and employs components that can  
produce arcs or sparks. To reduce the risk of  
fire or explosions, do not install in  
unvented compartments containing  
batteries or flammable gasses or areas in  
which ignition-protected equipment is required.  
• Inverter/Charger  
• TSC temperature sensor with 15’ cable  
• Owners Manual  
• Warranty Card  
• Jumper for AUX Switch (only used without  
Remote Control Panel or Link Instrument)  
• Wire Nuts  
WARNING  
Typical Tools Needed  
Flathead and Phillips Screwdrivers  
Allen (Hex) Screwdriver (1/8”)  
Wrench for connecting battery cables (9/16”)  
Wire Cutters  
Wire Strippers  
Misc. assortment of wire ties and connectors  
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.  
Accessories Needed for Installation  
Fuse - UL Listed DC Rated slow blow fuse as  
required by NEC  
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.  
Electrical wire (10 gauge) for AC input wiring.  
Consult NEC for proper size for output wiring.  
Battery Cables 1- Positive, 1-Negative  
Consult NEC for proper size  
DC fuse cable  
Mounting Screws (4)  
CAUTION To reduce the risk of fire, do not  
obstruct ventilation openings. Do not mount  
in a zero clearance compartment,  
overheating may result.  
CAUTION Risk of electrical shock. Both  
AC & DC voltage sources are terminated  
inside this equipment. Before servicing  
disconnect all inputs and outputs.  
Freedom 15D  
The Freedom 15D and 20D have  
dual AC Outputs.  
21  
Part No. 90-0123-00  
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INSTALLATION  
CAUTION Risk of electrical shock. Do not  
remove cover, no user serviceable parts  
inside. Refer servicing to qualified service  
personnel.  
5. Keep the overall length of each battery  
cable less than 10 feet. 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 inductive adverse effects of cable  
length. Be sure the cable size meets with NEC  
requirements for your installation.  
The Freedom Combi is appropriate for  
installation in recreational vehicles (RV), and  
other applications.  
It is recommended that installation be  
completed by an authorized Heart Interface  
technical dealer or experienced electrician.  
6. Make sure all wiring conforms to local  
and national electrical codes. If in doubt,  
consult with a qualified electrician.  
Key Installation Points  
1. The unit is designed to mount  
horizontally (on a shelf).  
7. To meet electrical codes, a UL Listed DC  
Rated slow blow 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 short circuit.  
The inverter is protected internally and will not  
blow a properly sized fuse.  
2. 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 pulls air across the  
internal components, particularly the trans-  
former and heat sinks, then out the fan vent.  
3. Keep the inverter/charger out of the  
elements and out of direct contact with  
water or spray. Failure to do so may result in  
premature malfunction from corrosion and void  
the warranty.  
8. Do not connect the battery until you  
have read the remainder of the installation  
section. 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.  
4. Mount the unit as close to the batteries  
as possible but not in the presence of  
flammable fumes or in an enclosed battery  
compartment.  
WARNING  
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.  
Do not mount the unit in an enclosed  
battery compartment. Take precautions to  
keep dirt and spray off the unit.  
22  
Part No. 90-0123-00  
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INSTALLATION  
9. 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  
two places with a pressure of 15 tons using a  
hexagonal die. The T&B die has a code  
number of 54. After the crimp is made, the  
barrel of the terminal and the first inch of the  
cable needs to be covered in UL Listed or UL  
Recognized heat shrink tubing. Heart Interface  
recommends a 2-inch length of 3M HDT 0800  
incoming AC must be fed only to the AC input  
and never the AC output. Always check for AC tubing. Other heat shrink may be used if it is  
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.  
UL Listed or UL Recognized as long as the  
manufacturer’s directions are followed.  
12. If installing in a system which includes an  
existing battery charger or AC to DC 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.  
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.  
13. An Auxiliary Switch port is located on the  
front panel of the unit, covered by a flap. When  
installing the unit for operation without a  
Remote Control Panel or Link Instrument, a  
jumper must be installed in the Aux Switch  
port. The jumper is shipped in a plastic bag  
with other installation parts. DO NOT install  
the jumper until all cable connections have  
been made.  
10. 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.  
When using a Remote Control Panel or  
Link Instrument, the jumper is not used.  
11. Always use proper wire and  
connectors. The proper battery cable size is  
critical. Considerable amperage flows in the  
DC circuit. Use 2/0 UL Listed Welding Cable  
terminated on each end with UL Listed or UL  
Recognized ring terminal connectors. For the  
terminal, use Thomas & Betts (T&B) part  
number BAL 2038. Be sure the connectors are  
attached to the cable using a method approved  
by the connector manufacturer. For the  
connections to meet all requirements, T&B  
recommends that each terminal be crimped in  
Auxiliary Switch Port  
Jumper  
Actual size 3/8”L x 3/16”W  
Freedom 20D  
23  
Part No. 90-0123-00  
Libertycombi.p65 10/26/98  
INSTALLATION  
Note: The battery cables are not  
connected to the AC ground strip or to the  
chassis lug of the unit.  
Grounding  
For safety purposes, the chassis of the  
inverter/charger must be connected to your AC  
ground system. Use 8 AWG bare copper or  
green insulated wire, strip one end and use a  
screwdriver to secure it to the chassis ground  
bonding lug on the side of the unit. This wire  
will connect to the ground in your AC electrical  
system. Make sure the connection is clean and  
tight.  
Neutral Bonding  
For safety purposes and NEC code  
requirements, the Freedom Combi unit  
internally bonds the AC output neutral (white)  
to the AC output 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-to-  
ground bond is automatically lifted.  
The system AC ground bonding terminal  
is located on the front of the unit under the  
wiring cover at the bottom of the unit. This  
connector is for the bare copper or green  
ground wires from the AC branch circuit supply  
and to the AC loads or distribution panel. It is  
important that these AC input and AC output  
ground wires connect to the AC ground bus in  
the circuit breaker panels.  
When external AC power is applied, the  
grounding system is connected to the source  
power ground, where neutral and earth ground  
are bonded together. This technique insures  
safety in all conditions and conforms to the  
requirements of the NEC.  
Some installations require heavier  
grounding wire. Conform to local and national  
electrical codes.  
WARNING  
More information on grounding can be  
found in the National Electrical Code and  
local electrical codes.  
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. The Over Temp/Overload and  
Low Battery LEDs will be blinking rapidly if  
this condition exists.  
Freedom 20D  
Ground Lug  
24  
Part No. 90-0123-00  
Libertycombi.p65 10/26/98  
INSTALLATION  
AC Wiring  
The AC wires route through the strain  
rated circuit breakers will be required between  
the inverter/charger and the loads.  
relief mounted in holes on the front of the unit.  
Use a screwdriver to remove the screws  
which secure the AC wiring compartment  
cover plate. Depending upon which model you  
have, there can be one or two AC inputs and  
one or two AC outputs within the AC wiring  
compartment. The labeling for the pigtails is on  
the front of the unit and is visible when the  
cover plate is removed. Note: Green wires are  
connected to the AC Ground Strip.  
Feed one or two 3 conductor AC input  
wire(s) through the strain relief and into the AC  
wiring compartment. Allow 6 inches of  
individual insulated black, white and green wire  
to work with. Strip 1/2 inch of insulation off  
each conductor and connect to the pigtails:  
Black to Black, White to White, and Green to  
AC Ground Strip.  
Use the wire nuts provided to make the  
wire connections. You may chose to use butt  
splices (not included) to make the wire  
connections.  
Black . . . . . . . . . . . . . . . . . Hot or Line  
White . . . . . . . . . . . . . . . . . Neutral  
Conventional metal strain reliefs are  
provided. These can be replaced with plastic  
strain reliefs for additional corrosion resistance  
or 3/4 inch conduit fittings if the wiring will be  
routed through a conduit.  
AC Output: Depending on the model you  
have, feed one or two 3 conductor AC output  
wire groups for the two branch circuit loads  
through its strain relief. Remember to allow 6  
inches of individual insulated black, white and  
green wire to work with. Strip 1/2 inch of  
insulation off each conductor and connect to  
the pigtails: Black to Black, White to White,  
and Green to AC Ground Strip.  
Appropriate wire gauges must be used  
throughout the installation. Refer to NEC  
specifications.  
AC Input: All inputs from other AC  
sources must be protected by branch circuit  
rated circuit breakers.  
Tug firmly on each connection to make  
sure they are secure. Lter, if the unit is not  
operating properly, check these connections  
first. Carefully tuck the wires into the AC wiring  
compartment. Replace the cover plate.  
In the United States, no additional circuit  
breakers are required between the inverter/  
charger and the loads if the service to the  
inverter/charger is protected by a 20 ampere  
branch circuit rated breaker. This also applies  
to Dual Input models where the inputs may be  
20 amperes each. In Canada, 15 ampere  
branch circuit(s) maximum shall provide the  
service.  
Dual AC Output  
STRAIN  
RELIEF  
STRAIN  
RELIEF  
If a 30 ampere service supplies the  
inverter/charger, additional 20 ampere (15  
ampere in Canada) maximum branch circuit  
AC OUTPUT 2  
ACGROUND  
STRIP  
INPUT  
AC OUTPUT 1  
25  
Part No. 90-0123-00  
Libertycombi.p65 10/26/98  
INSTALLATION  
Ground Fault Circult Interrupters  
To conform to NEC regulations, certain  
branch circuits must be equipped with a  
DC Wiring  
DC wiring is generally very simple, the  
positive (+, may be red for identification) and  
Ground Fault Circuit Interrupter (GFCI). Please negative (-, may be black or yellow for  
consult the code or a qualified electrician for  
details. Any such branch circuits must be  
protected by a brand rated circuit breaker  
consistent with the GFCI rating. Underwriters  
Laboratories has tested the following GFCI,  
and its use is recommended. Receptacle  
Type:  
identification) cables from the inverter/charger  
terminal posts are connected to the house or  
auxiliary battery. Connection to the engine  
starter battery is not recommended.  
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 cable length  
does not exceed 10 feet.  
Pass & Seymour  
Catalog Number 1591  
Rated: 15 Amps at 120 Volts AC  
Battery cables should be connected to the  
inverter/charger before any connections are  
made to the battery. Follow the battery  
hardware stackup diagram.  
Remote Control Wiring  
If installing a remote panel, route the  
remote cable and connect to the Remote jack  
on the front of the unit. Refer to the Remote  
Control Panel or Link Owner’s Manual for more  
information.  
• Remove the negative (-) battery cable  
cover from the unit and attach the battery  
cable. Tighten the battery terminal bolts to a  
torque value between 160 inch-pounds and  
180 inch--pounds. Replace the cover for the  
negative terminal before removing the cover for  
the positive terminal.  
TSC Temperature Sensor  
If installing the TSC (Temperature  
Sensitive Charging) sensor, connect the ring  
terminal end to the positive battery post,  
complete the routing of the RJ11 cable (15 feet  
supplied) and connect the plug end to the TSC  
jack on the front of the unit  
Battery Cable  
Hardware Stackup  
Diagram  
Bolt  
Lock Washer  
Flat Washer  
TSC Jack  
RJ11 Cable  
Battery  
Battery Cable  
Inverter/Charger  
CAUTION Improper stackup may result in  
excessive heat and damage to the unit.  
Freedom 20D shown.  
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.  
26  
Part No. 90-0123-00  
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INSTALLATION  
• Remove the positive (+) battery cable  
terminal cover from the unit and attach the  
battery cable. Tighten the battery terminal bolts  
to a torque value between 160 inch-pounds  
and 180 inch-pounds. Replace the cover for  
the positive terminal.  
If multiple battery banks are to be  
charged, a battery bank selector switch can be  
installed, allowing the banks to be charged  
either individually or simultaneously. A solenoid  
can also be used. The PathMaker Battery  
Combiner, by Heart Interface, may be used to  
connect multiple battery banks. The  
The negative (-) cable should be  
connected directly to the negative post of the  
house or auxiliary battery bank or the ground  
side of a current shunt. Tighten securely.  
PathMaker battery combiner is available from  
your Heart dealer.  
The positive (+) battery cable must be  
fused and connected to the positive post of the  
house or auxiliary 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.  
If multiple batteries are used, the  
interconnecting jumper cables must be the  
same AWG or larger as those connected to  
the inverter/charger.  
PathMaker 100, 2 Channel  
NOTE: If installing in a vehicle, do not use the  
vehicle frame as the negative conductor.  
PathMaker Models  
70 Amp, 2 Channel  
100 Amp, 2 Channel  
100 Amp, 3 Channel  
200 Amp, 2 Channel  
200 Amp, 3 Channel  
POSITIVE (+)  
(Battery Cable  
Cover on)  
NEGATIVE (-)  
(Battery Cable  
Cover on)  
Freedom 15D  
27  
Part No. 90-0123-00  
Libertycombi.p65 10/26/98  
INSTALLATION  
For Freedom 15 & 15D  
Battery Cable Fusing  
200 Amp Fuse & Holder PN# 84-4155-00 (C/R)*  
200 Amp Fuse & Holder PN# 84-4158-00 (R/R)**  
A fuse is required by the NEC to protect  
the battery and cables. A UL Listed DC rated  
slow blow fuse must be installed in the positive  
(+) battery cable, within 18 inches of the  
battery.  
200 Amp Fuse Only  
PN# 84-4157-00  
For Freedom 20 & 20D  
300 Amp Fuse & Holder PN# 84-4156-00 (C/R)*  
300 Amp Fuse & Holder PN# 84-4154-00 (R/R)**  
Recommended Fuse: UL Listed Class T  
JLLN with a DC Rating. This fuse with fuse  
holder is available from your dealer or Heart  
Interface.  
300 Amp Fuse Only  
PN# 84-4151-00  
* Compression / Ring Terminal  
** Ring / Ring Terminal  
_
+
+ (red)  
EXPLODEDVIEW  
OF FUSE ASSEMBLY  
COMPRESSION / RING TERMINAL  
NUT  
RING / RING TERMINAL  
LOCK WASHER  
FLAT WASHER  
BATTERY  
NUT  
LOCK WASHER  
FLAT WASHER  
INVERTER  
CABLE  
CABLE  
INVERTER  
CABLE  
FUSE  
BATTERY  
CABLE  
FUSE  
FUSE HOLDER  
FUSE HOLDER  
WARNING  
Improper stack up of hardware will cause  
excessive heat and fuse failure. Stack up  
as shown.  
28  
Part No. 90-0123-00  
Libertycombi.p65 10/26/98  
INSTALLATION  
Follow these instructions to insure proper  
start up and confirm that the installation is  
correct.  
WARNING  
Do not turn the inverter ON before  
1. Check to make sure Invert and Charge  
are OFF. The INVERT LED should not be  
illuminated, the CHARGE LED should be  
blinking (charger ready but no external AC  
power available). If using a Remote Control  
Panel or a Link Instrument, make sure inverter  
and charger are OFF.  
eliminating any possibility of backfeed.  
Add a load of 7 watts or more to the output  
of the inverter. A 40 watt incandescent light  
bulb will work fine. The DC Amps LEDs on the  
remote will indicate the DC draw from the  
battery through the inverter.  
2. Check battery polarity. If the unit was  
connected to the battery with reverse polarity,  
the unit will be damaged.  
Leave the load connected and turn OFF  
the INVERT mode by pressing the INVERT  
switch or turn OFF the INVERT mode from the  
Remote Control Panel or Link Instrument.  
3. Check the battery voltage and ensure  
it is within proper range for the unit (10-15.5  
VDC).  
2. Test the transfer function:  
Be sure the unit is OFF, the INVERT and  
CHARGE LEDs are not illuminated. Apply  
shore power. If there is a back-feed in the  
installation, the unit will protect itself, the LOW  
BATTERY and OVERTEMP/OVERLOAD LED  
will both be blinking rapidly (5 times per  
second). Do not proceed until the backfeed  
condition has been corrected.  
4. Install the jumper in the Auxiliary  
Switch port (AUX SWITCH), if using the in-  
verter without remote. If operating the inverter  
with a remote, the jumper should not be used.  
Do not apply shore power or  
generator power without preforming the  
following steps:  
Once shore power has been applied to the  
unit, there will be approximately an 8 second  
delay. Then the unit should transfer shore  
power and power the load. If this does not  
happen, do not proceed. If the LOW BATTERY  
and OVERLOAD/OVERTEMP LEDs are blink-  
ing rapidly or if you are using a Remote Control  
Panel or Link Instrument, check the panel for  
back-feed indication. The panel will show an  
overload condition. Eliminate the back-feed  
condition.  
1. Test the inverter function:  
With no loads connected to the output of  
the inverter, turn the INVERT Switch ON. The  
INVERT LED should be blinking green. If using  
a remote, turn ON the inverter with the switch  
on the Remote Control Panel or Link  
Instrument.  
The Freedom unit will produce a slight  
buzz. If using a Remote Control Panel or Link  
Instrument the INVERT/ CHARGE LEDs 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.  
Freedom 15D  
29  
Part No. 90-0123-00  
Libertycombi.p65 10/26/98  
INSTALLATION  
Testing for backfeed. If a backfeed  
condition is indicated, disconnect from shore  
power and disconnect the AC output wires on  
the inverter. Make sure the inverter is OFF.  
Apply shore power and measure for  
Turn the INVERT ON, the green LED  
should blink. Remove shore power and the  
inverter should automatically pick up the AC  
load when shore power is removed.  
NOTE: For low power system shut down  
mode, both the INVERT and CHARGE LEDs  
must be OFF.  
voltage between the black and white wires that  
were attached to the inverter output feeding the  
electrical panel or loads, not the inverter output  
wires. If there is voltage on these wires, a  
back-feed condition exists and must be  
corrected or damage will result.  
Repeat the test for transfer and battery  
charger with the generator if you have one.  
Congratulations, you have completed a  
successful installation.  
3. Test the battery charger function:  
With shore power applied and the  
transfer switch engaged, the battery charger  
should be in operation. The CHARGE LED will  
blink for 8 seconds. After the 8 seconds, the  
unit will enter the charge mode and the LED  
will be illuminated. (NOTE: When using  
Temperature Sensitive Charging, this time may  
be longer.)  
NOTE: When AC is available, the unit will  
automatically default to charge mode without  
the operator setting the unit in CHARGE mode.  
It is necessary to press the CHARGE switch  
OFF, if you do not want to charge.  
Freedom 20D  
Verify the charger is working by using a  
volt meter. The battery voltage should gradually  
increase. If using a Remote Control Panel, the  
DC Amps LED indicates the current the  
charger is putting out and the DC Volts LED  
indicates an increase in battery voltage.  
30  
Part No. 90-0123-00  
Libertycombi.p65 10/26/98  
TROUBLESHOOTING LED STATUS  
LED Status  
Operation Status  
Notes  
INVERT  
CHARGE  
LOW BATTERY  
OVERTEMP  
OVERLOAD  
Solid Green  
Blinking Green OFF  
OFF  
Inverting. Charger ready but no  
external AC available.  
Normal  
Blinking  
Green  
Solid Green  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
*
Inverter is in standby.  
Battery is being charged.  
Normal, charging current  
limited if AC load exceeds  
Power Sharing setting.  
Blinking  
Green  
Inverter is in istandby.  
Charger manually turned off.  
If AC power is removed  
and reapplied, the charger  
will automatically turn ON.  
OFF  
Solid Green  
Inverter OFF. Charging.  
Reset the inverter by  
pushing INVERT button.  
LED should blink.  
Solid Green  
Blinking Green Solid Red  
Inverting. Charger ready but no  
external AC available. Battery  
Voltage Warning:  
Warning. Battery voltage  
less than 10 or more than  
15 volts  
10V<VDC>15V  
Solid Green  
OFF  
Blinking Green  
*
Solid Red  
*
Inverting. Charger ready but no  
external AC available. Over-  
temperature Warning  
Warning. Inverter shutdown.  
Blinking Green Slow Blinking  
Red  
Battery Voltage shutdown:  
10V< VDC >15V  
Inverter Shutdown.  
Operation will resume when  
battery reaches 13.5 volts  
OFF  
Blinking Green  
Blinking Green  
*
*
Slow Blinking  
Red  
Charger ready but no external  
AC power available. Charger  
over-temperature Shutdown  
Operation will automatically  
resume after unit has  
cooled down  
OFF  
OFF  
Fast Blinking  
Red  
Inverter Overload Shutdown  
Reduce AC load. Manually  
restart the system  
Blinking Green Fast Blinking  
Red  
Fast Blinking  
Red  
Backfeed Shutdown. Incorrect  
AC wiring  
Correct AC in wiring before  
use. Manually restart the  
system.  
OFF  
Blinking Green Fast Blinking  
Red  
OFF  
Battery Ripple  
Warning  
* Could be either ON or OFF status.  
31  
Part No. 90-0123-00  
Libertycombi.p65 10/26/98  
TROUBLESHOOTING  
Problem  
Things to Check  
1. Battery voltage under load below 10 volts. Charge batteries.  
2. Loose battery connections, open battery switch or blown DC fuse.  
Tighten connections or replace fuse.  
3. Tripped circuit breaker on front panel. Push-in to reset breaker.  
4. Thermal condition, excessive loads or inadequate ventilation  
caused overheating. Allow to cool. Ventilate the compartment.  
5. Overloads or short circuit, check for excessive loads or shorted  
wiring. Disconnect loads.  
No Inverter Output  
6. Check the position of the jumper in the Auxiliary Switch Port. Install  
jumper when operating unit without a remote.  
Confirm that your volt meter is a True RMS meter. Standard volt  
meters will not accurately read the waveform of the inverter and may  
read anywhere from 90 to 120 volts. If a True RMS meter is not  
available, check the brightness of an incandescent light bulb - if it  
appears normal, the output voltage is properly regulated.  
Low Inverter  
Output Voltage  
1. Wiring - check both the AC and DC connections.  
2. AC input voltage - low voltage input will result in low DC output  
current. Expect reduced charger output from generators under 3,500  
watts.  
3. Check power share setting if using a remote panel.  
4. Check the position of the jumper in the Auxiliary Switch Port if not  
using a remote panel.  
Little or No Output  
from Battery  
Charger  
1. Microwave ovens will normally cook slower on inverter power  
because the modified sine wave output has a slightly low peak AC  
voltage.  
2. Cooking speed will be determined by battery voltage. Low voltage  
results in increased cooking time. Support the battery bank with an  
alternator or other charging source for quicker cooking.  
Microwave Oven  
Cooking Slow  
1. Digital clocks either employ an internal time base or derive their  
time base from the incoming AC waveform. The inverter frequency is  
well regulated at 60 Hz. The clock either counts the number of peaks  
in the waveform or the number of times the waveform crosses zero  
volts. The circuitry that counts the zero crossing events is more  
popular. The longer zero cross time of the inverter’s modified sine  
wave may cause double clocking, resulting in a faster clock.  
Slow or Fast  
Digital Clock  
32  
Part No. 90-0123-00  
Libertycombi.p65 10/26/98  
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.  
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 (Amp, A) The unit of measure of  
electron flow rate of current through a circuit.  
ampere-hours.  
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.)  
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-Hour 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  
ampere-hours.  
Combi Freedom CombiTM is a trademark of  
Heart Interface to indicate a combination  
inverter/charger.  
Current The rate of flow of electricity or the  
quantity of available electrolyte, grid alloys, final movement rate of electrons along a conductor.  
limiting voltage, discharge rate, temperature, It is comparable to the flow of a stream of  
internal and external resistance, age and life of water. The unit of measure for current is  
the battery (bank).  
ampere.  
AGM (Absorbed Glass Mat) Battery A lead  
Cycle In a battery, one discharge plus one  
acid, maintenance-free battery.  
recharge equals one cycle.  
AWG (American Wire Gauge) A standard  
used to measure the size of wire.  
Direct Current (DC) Current that flows  
continuously in one direction such as that from  
batteries, photovoltaics, alternators, chargers  
and DC generators.  
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 the  
33  
Part No. 90-0123-00  
Libertycombi.p65 10/26/98  
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.  
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.  
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.  
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.  
GFCI (Ground Fault Circuit Interrupter) A  
protective device that rapidly de-energizes a  
circuit when current to ground exceeds a  
predetermined value.  
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.  
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.  
TSC Abbreviation for Temperature Sensitive  
Charging. The ability of the charger to adjust its  
charging voltage based on the temperature  
sensed at the battery bank if a temperature  
probe is used.  
Volt The unit of measure for electric potential.  
LED (Light Emitting Diode) Indicator light.  
Watt The unit for measuring electrical power,  
i.e., the rate of doing work, in moving electrons  
by or against an electric potential.  
LINK Instrument These panels monitor single  
and dual battery banks. Some models provide  
remote management of Freedom Inverter/  
Chargers. Available in 4 models: LINK 10,  
LINK 20, LINK 1000, LINK 2000, LINK 2000R.  
Watt-Hour (Watt-HR, WH) The unit for  
measuring electrical energy which equals  
Watts x Hours.  
NEC National Electric Code  
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.  
Negative Designating or pertaining to  
electrical potential. The negative terminal is the  
point from which electrons flow during  
discharge.  
34  
Part No. 90-0123-00  
Libertycombi.p65 10/26/98  
SPECIFICATIONS  
Model  
15 and 15D* (458 Series)  
81-1510-12 and 81-1520-12  
12 VDC  
20 and 20D* (458 Series)  
81-2010-12 and 81-2020-12  
12 VDC  
Part Number  
Nominal Battery Voltage  
Battery Voltage Range  
Low Battery Cutout  
AC Input Voltage Range  
10.0 - 15.5 VDC (+/-0.2)  
10.0 VDC (+/-0.5)  
10.0 - 15.5 VDC (+/-0.2)  
10.0 VDC (+/-0.5)  
Minimum 90 VAC  
Normal 130 VAC  
Minimum 90 VAC  
Normal 130 VAC  
Frequency Regulation  
50 or 60 Hz Quartz Regulated  
1500 VA  
50 or 60 Hz Quartz Regulated  
2000 VA  
Inverter Output Power  
(Continuous)  
Inverter Voltage Regulation  
Wave Shape  
120V +/- 5% True RMS  
Modified Sine Wave  
55 Amps  
120V +/- 5% True RMS  
Modified Sine Wave  
70 Amps  
Surge Power  
No Load Current Drain  
(Idle Mode)  
.12 Amp  
.12 Amp  
Power Factors Allowed  
Full Load Efficiency  
Peak Efficiency  
Protection  
All  
All  
86% (60 Hz)  
92%  
85% (60 Hz)  
93%  
Over/Under Utility Voltage, Over/Under  
Battery Voltage, Short-Circuit, Circuit  
Breaker, Over Temperature, Backfeed  
Over/Under Utility Voltage, Over/Under  
Battery Voltage, Short-Circuit, Circuit  
Breaker, Over Temperature, Backfeed  
Charging Rate  
75 Amps (3-stage)  
17 Amps  
100 Amps (3-stage)  
21 Amps  
AC Input  
(Max. Charge Mode)  
Bulk Charge Voltage  
Float Charge Voltage  
Equalizing Charge Voltage  
Status Panel  
14.3 VDC**  
14.3 VDC**  
13.4 VDC**  
13.4 VDC**  
16.3 VDC**  
16.3 VDC**  
Optional Remote or Link Instruments  
56 lbs.  
Optional Remote or Link Instruments  
56 lbs.  
Weight  
Dimensions  
13.2"L x 11.5"W x 7.9"H  
13.2"L x 11.5"W x 7.9"H  
* Dual AC Output  
** Variable on unit with Temperature Sensor installed and adjustable by Battery Type selected on the inverter/charger  
control panel or from the Remote Control Panel.  
The Freedom 15, 15D, 20 and 20D are UL and cUL Listed.  
35  
Part No. 90-0123-00  
Libertycombi.p65 10/26/98  
WARRANTY  
Your Heart Interface Freedom 458 Series  
CombiTM Inverter/Charger is under limited  
warranty for 30 months from date of purchase.  
Terms of this 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 model and serial number of your  
unit. Please have this information ready.  
Phone numbers:  
(253) 872-7225  
(800) 446-6180(outside 253 area code)  
A return authorization number will be  
required on all returns. This number is issued  
by the service technician and should be written  
on the outside of the packaging  
You must ship the unit to Heart Interface  
or a field service center freight prepaid.  
Inverter/Chargers  
© 1998 Heart Interface Corporation. All rights reserved.  
36  
Part No. 90-0123-00  
LUibLertycombi.p65 10/26/98  

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