Fire-Lite CHG-120F Battery Charger - Manual (Page 20)

Installing the Charger
Configuring the Charger
20
CHG-120F Instruction 03/21/01 PN 50888:B0
Configuring the Charger
The charger can be configured to do the following:
• Receive 120 VAC or 240 VAC input power (see Figure 3 on page 11).
• Delay AC loss reporting (for Central Station applications); and
• Disable charger ground fault detection.
Figure 13 shows how to configure the charger for delaying the loss of AC reporting and for
disabling ground fault detection:
Figure 13 Configuring the Charger
Delay loss of AC Reporting - If using a Digital Alarm Communicator (DACT), you must
delay the reporting of an AC loss condition to a central station. This delays activation of the
trouble bus and Form-C trouble contacts when AC fails. You can configure the charger for
an 8-hour or a 16-hour delay as follows:
• 8-hour delay – Cut and remove jumper JP8 on the charger (Figure 13).
• 16-hour delay – Cut jumper JP8; then, cut and remove resistor R100 (Figure 13).
Disable Ground Fault Detection - To disable local (charger) earth fault detection, cut
and remove resistor R104 (Figure 13). Figure 14 contains a simplified block diagram that
shows ground fault detection disabled on a charger connected to a power supply:
Figure 14 Disabling Ground Fault Detection
Delay loss of AC (16 hrs)
cut and remove R100, in
addition to cutting JP8
Disable ground fault detection
cut and remove R104
Delay loss of AC (8 hrs) cut only JP8
On the charger,
disable ground fault
detection (cut R104).
Charger
MPS-24F/
On MPS-24F or
MPS-24AF, enable
ground fault
detection.
MPS-24AF