Notifier CHG-120 User Manual
Chg-120, Battery charger, General

DN-6040:A2 • 10/18/2012 — Page 1 of 2
CHG-120
Battery Charger
Power Supplies
DN-6040:A2 • E-191
General
The CHG-120 is a state-of-the-art battery charging system
designed for use with NOTIFIER Fire Alarm Control Panels
(FACPs). It is designed to charge lead-acid batteries between
25 and 120 ampere-hours (AH).
Features
• Charges sealed lead-acid batteries.
• Automatic float-type battery charger.
• Rated for batteries of 25 to 120 ampere-hours.
• Obtains full float voltage within 48 hours.
• For use on any 24-volt FACP which can handle the speci-
fied batteries and can disable the local charger.
• AC Fail delay (central station applications) per latest NFPA
requirements.
• Form-C Trouble contact.
• Dual outputs, for easy load distribution.
• Diagnostic LEDs:
– Primary AC On
– Charger Trouble.
– Ground Fault.
– Hi Charge.
– Lo Charge.
– Battery Voltage Level (3 LEDs).
– Low Battery.
• Black or red NFS-LBB(R) battery cabinet (optional).
• Field-selectable input voltage, 120 VAC or 230 VAC.
• Charges:
– 26 AH batteries within 9 hours.
– 55/60 AH batteries within 20 hours.
– 120 AH batteries within 38 hours.
NOTE: Values per NOTIFIER testing.
Construction and Operation
The CHG-120 consists of a PC board and mounting chassis.
Charging current is provided automatically when the battery
voltage falls below the charger’s output voltage.
Applications
Use the CHG-120 when batteries required for standby are
rated between 25 to 120 AH.
CHG-120 Specifications
Primary AC (TB1):
– 115 VAC, 60 Hz, 2 A.
– 230 VAC, 50 Hz, 1 A.
Form-C relay (TB3): 5 A at 30 VDC.
Float charge voltage: 27.6 VDC.
Maximum charging current: 4.5 A.
Fuses F1-F3: 15 A.
Battery sizes: 26 AH to 120 AH.
Charging time (to charge two fully discharged batteries):
– 25 AH = 9 hours.
– 55 AH/60 AH = 20 hours.
– 120 AH = 38 hours.
Installation
The CHG-120 has a variety of mounting options. It can be
mounted in either a CAB-4 Series backbox or remotely in the
NFS-LBB Battery Backbox. Install the CHG-120 within 20 feet
(6.096 m) of the main FACP.
When mounting in a CAB-4 Series backbox:
• The CHG-120 can be mounted in the main power supply
position, on the lower left of the CAB-4 Series backbox.
• Using self-tapping screws, the CHG-120 can be mounted in
the lower right position (normally, where the batteries are
mounted) of the CAB-4 Series backbox.
When mounting remotely in the NFS-LBB:
• The CHG-120 mounts in the left position of the backbox.
NOTE: Only one 55 AH battery or two 26 AH batteries will mount
with the charger board in the NFS-LBB.
NFS-LBB Battery Box Battery Configurations: The battery
backbox can mount configurations of batteries as follows:
• Without CHG-120 mounted internally:
– Up to two 26 AH batteries.
– Up to two 55/60 AH batteries.
– One 100 AH battery.
• With CHG-120 mounted internally:
– Up to two 26 AH batteries.
– One 55/60 AH battery.
– One 100 AH battery.
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