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The charger also provides the following features:
•
AM-1 ammeter (0-10A) ordered separately
•
VM-1 voltmeter (0-50 V) ordered separately
•
Disable local ground fault detection
•
Selectable loss of AC delay (8 or 16 hours)
Table 1 contains electrical specifications for the charger:
Primary AC power in (TB1)
Form-C relay (TB3)
Float charge voltage
Maximum charging current
Fuses F1-F3 (PN 12057)
Battery sizes
Charging Time (to charge two fully discharged batteries
The charger complies with the following standards:
•
NFPA 72-1993 National Fire Alarm Code
•
UL 864 Standard for Control Units for Fire Alarm Systems and UL 1481 Power
Supplies for Fire Alarm Systems
•
CAN/ULC-S527-M87
The charger does not require regular maintenance. While installing the charger, however,
make sure to maintain proper polarity when connecting power leads and battery
connections. To ensure optimal operation of the charger, observe the following:
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provide overload and reverse-polarity protection. Replace a blown fuse with a fuse with the
same rating and type.
Periodically inspect the batteries for corrosion and make sure that
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corrosive effects to the batteries do not affect the charger or cabinet.
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Most problems with a charger are due to faulty batteries or loose
connections. If you encounter problems, inspect the charger, the battery, and all
connections for loose wiring or short circuits.
Only replace batteries with the same charge rate and capacity as
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other batteries in the set. For example, if replacing one of four 55 AH batteries, make sure
the replacement battery has the same charge rate and capacity as the other three batteries.
Table 1 Charger Specifications
Fuses F1, F2 and F3 (15 A, PN
ADT-CHG-120 Instruction 05/01/98 PN 50938:A
Specifications
120 VAC, 60 Hz, 2 A
240 VAC, 50 Hz, 1 A
5 A at 30 VDC
27.6 VDC
4.5 A
15 A
25 AH to 120 AH
25 AH – 9 hours
55 AH/60 AH – 20 hours
120 AH – 38 hours
)
12057
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