INCORPORATED
®
Installation
ITC-Series
Inverter
Page 16
8/05/17
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.
GenStart
It should be noted that the Generator Start Operation is designed to minimize the generator run time, so at the
present set points there is no Absorption stage per se. Therefore, the batteries must be periodically conditioned
by leaving the generator on, or charging them with another system.
The GenStart feature is designed for use in installations where a generator is used to provide AC input power for
battery charging. The GenStart feature provides a contact closure to signal the generator to start when battery
voltage falls below the ‘Generator Start Volts’ 11.0 (22) VDC setpoint. The GenStart contacts open when bulk
charging current fall below the ‘Generator End Amps’ 20 Amp DC setpoint. The Bulk charging current is checked
every 4 minutes, therefore the minimum generator ON time is 4 minutes. The contacts are NEC Class 2, rated 2
amps at 24 VDC.
It should be noted that the GenStart contacts are shown in Figure 1.4-9 Customer Terminations, and likewise a
similar set of Normally Open Contacts are available to indicate a “Low Battery” or “Fan On” condition.
Caution
