INCORPORATED
®
Installation
ITC-Series
Inverter
Page 15
Owner‟s Manual 10/7/05
„Absorption Charge Amps‟ setpoint and the Equalize Voltage 15.5 (30.0) VDC setpoint.
The Equalize Charge Cycle provides a deliberate overcharging of the battery to remove sulfate, which
accumulates on the battery plates through normal use. Equalizing returns battery cells to equal performance
levels, which improves battery performance and extends battery life. Consult the battery manufacturer for their
recommendation regarding how often the Equalize Cycle should be performed.
CAUTION
Do not equalize sealed (valve regulated lead acid, AGM or gel) batteries!
Consult battery manufacturer for
equalizing guidelines. Do not equalize more often than approximately once a month. Check battery fluids after
equalizing is complete, as gassing will occur. Use Equalize Mode only if batteries are in a well ventilated area!
Stage 3:
Float Charge Stage - Maintenance Mode
In the Float Stage the charging voltage is reduced to the „Float Charge Voltage‟ setpoint and charging current is
limited to the „Absorption Charge Amps‟ setpoint. The charger will remain in the Float Stage until shore power
is reapplied, or until the charger or system is turned OFF and then ON again.
Charging Setpoints
The ITC‟s battery charger factory setpoints are for wet batteries. Do not use GEL type batteries without
changing the factory setpoints via the configuration switches.
CAUTION
Do not operate DC loads, such as DC lights, pumps, etc., during battery charging.
The loads may cause
overcharging by preventing the charging stages from reaching their „trigger points‟ or may cause the battery to
run down even though the charger is ON.
T 1 Figure 2.2-2 Battery Charger Factory Setpoints
Guideline
SP00172
24V
Factory
Setpoint
(for Wet
Battery)
Factory
setpoint for
Gel/AGM
Battery
Units
12V
24V
12V
24V
Bulk Charge Volts
28.6
14.2
28.4 14.1
28.2
VDC
Bulk Charge Current
20% C Rate
60
80
60
80
80
Amps
Absorption Charge Volts
28.6
14.5
29.0
14.2
28.4
VDC
Absorption Charge Current
55
40
55
40
40
Amps
Absorption Maximum Time
10
10
10
10
10
Minutes
Float Charge Volts
26.6
13.2
26.4
13.7
27.4
VDC
Equalize Volts
Wet only
N/A
15.5
31.0
N/A
N/A
VDC
Equalize Maximum Time
Wet only
N/A
15
15
N/A
N/A
Minutes
Battery „C Rate‟ is equal to battery Amp Hour capacity.
Battery Temperature Sensor Option
The battery temp sensor is designed to reduce the float voltage when the battery temperature exceeds 25°
Celsius. No reduction in float voltage should occur below 25°C (77° F). The battery temp sensor plugs into P7,
which is located on the left side of the control board. See F 13 Figure 3-1 Customer Terminations. The battery
temperature sensor and 35‟ cable kit part number is ITC-BTS. Individually, the temperature sensor part number
is D012684 and the cable part number is D012638.
Automatic Power Management (APM)
A key feature of the battery charger operation is Automatic Power Management (APM). This feature monitors
the AC input current and will reduce the battery charger output as necessary to keep the AC input current under
the APM setpoint. The APM circuit will not limit power to the passthrough AC loads. If the passthrough AC
loads exceed 30 Amp, the battery charger output will be reduced to zero and the breaker may trip.
