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CHG-75
Battery Charger
General
The CHG-75 battery charger is designed to charge leadacid
batteries that provide emergency standby power for a Fire
Alarm Control Panel (FACP) and related equipment. Two 12-
volt batteries are used in series to supply a nominal 24 VDC.
The battery charger is compatible with any FACP that uses
lead-acid batteries with a rating of 25 AH (amp-hours) to 75
AH. The FACP must have a feature that allows the disabling of
the control panel battery charger.
Features
• 120 VAC or 220/240 VAC operation.
• Rated for batteries 25 to 75 AH.
• Charger can connect to the Signaling Line Circuit (SLC) of
a Fire•Lite addressable intelligent control panel for trouble
monitoring.
• Mounts in a BB-26 or BB-55F enclosure.
• Screw terminal connections for battery, battery backup to
other equipment and SLC loop.
• 6.25 A fuse (F1) for AC overload protection.
• 15.0 A replaceable fuse (F2) provides battery with current-
limiting, short circuit, and overload protection.
• 15.0 A replaceable fuse (F3) provides battery with current-
limiting and overload protection for output to connected
equipment.
• Form-C trouble relay rated for 2.0 A @ 30 VDC (resistive).
• Ground fault detection circuit (can be disabled).
• Battery, charger, and AC voltage supervision.
• AC loss reporting delay option for 8- or 16-hour delay.
• Connectors for trouble input and output — direct CHG-75
troubles to FACP and allow daisy-chaining of external trou-
bles through the charger without affecting charger opera-
tion.
• Master trouble input allows monitoring of another device or
zone.
• Diagnostic LEDs for monitoring: Primary AC On, Charger.
• Trouble, Ground Fault, Charging, SLC Communication,
• Low Battery.
Construction and Operation
The CHG-75 consists of a PC board and mounting chassis.
See Installation section for compatible backboxes.
Charging current is provided automatically when the battery
voltage falls below the charger's output voltage. While charg-
ing the batteries, the CHGING (charging) LED will turn on.
When batteries are fully charged, the charger maintains a float
charge of 27.6 VDC. The SLC LED and AC LED are the only
other LEDs that should be on during normal operation if SLC
communication is programmed at the FACP and the SLC
enable switch is On.
Power Supplies/Accessories
Applications
Use the CHG-75 with Fire•Lite FACPs when batteries required
for standby are rated equal to or greater than 25 AH.
CAUTION: When installing the batteries, make
certain that proper polarity is observed between the
power leads and the battery terminal posts. See
installation manual for complete instructions and
additional precautions.
Electrical Specifications
• Primary AC power in (TB1): 120 VAC, 60 Hz, 2.0 A; or
220/240 VAC, 50 Hz, 1.0 A. Wire size: minimum 14 AWG
(2.0 mm²) with 600-volt insulation.
• Form-C relay (TB4): 2.0 A at 30 VDC (resistive).
• Float charge voltage: 27.6 VDC.
• Maximum charging current: 4.5 A (peak).
• Battery sizes: 25 AH to 75 AH.
Installation
The CHG-75 can be mounted remotely in the BB-26 or BB-
55F battery backbox. Install the CHG-75 within 20 feet
(6.096 m) of the main FACP.
When mounting remotely in the BB-55F: The CHG-75
mounts to the right of the mounting holes positioned at the top
of the cabinet. Use the supplied self-tapping screws to secure
the charger to the backbox.
When mounting remotely in the BB-26: The CHG-75
mounts just below mounting holes positioned at the top center
of the cabinet. Use the supplied nuts to mount the charger to
pem studs located in the backbox.
Product Line Information
CHG-75: Battery charger circuit board and mounting chassis.
Includes mounting hardware and installation instructions.
BAT-12260: 26 AH, 12-volt, sealed lead-acid battery.
BB-26: Battery backbox holds up to two BAT-12260 26 AH bat-
teries. Box dimensions: 15.6" (39.62 cm) wide x 15.5" (39.37
DF-52220:A1 • 10/18/2012 — Page 1 of 2
DF-52220:A1 • D-250
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Summary of Contents for Honeywell Fire-Lite CHG-75
- Page 1 DF-52220:A1 • D-250 CHG-75 Battery Charger Power Supplies/Accessories General The CHG-75 battery charger is designed to charge leadacid batteries that provide emergency standby power for a Fire Alarm Control Panel (FACP) and related equipment. Two 12- volt batteries are used in series to supply a nominal 24 VDC. The battery charger is compatible with any FACP that uses lead-acid batteries with a rating of 25 AH (amp-hours) to 75 AH.
- Page 2 • CSFM: 7315-0075:0201. • MEA: 297-01-E. Fire•Lite® is a registered trademark of Honeywell International Inc. ©2012 by Honeywell International Inc. All rights reserved. Unauthorized use of this document is strictly prohibited. This document is not intended to be used for installation purposes.