Storage batteries shall be provided and shall be 24 Vdc sealed,
lead-calcium type requiring no additional water. The batteries shall have
ample capacity, with primary power disconnected, to operate the fire alarm
system for a period of 72 hours. Following this period of battery
operation, the batteries shall have ample capacity to operate all
components of the system, including all alarm signaling devices in the
total alarm mode for a minimum period of 15 minutes. Batteries shall be
located [at the bottom of the panel] [in a separate battery cabinet].
Batteries shall be provided with overcurrent protection in accordance with
NFPA 72. Separate battery cabinets shall have a lockable, hinged cover
similar to the fire alarm panel. The lock shall be keyed the same as the
fire alarm control panel. Cabinets shall be painted to match the fire
alarm control panel.
2.3
BATTERY CHARGER
Battery charger shall be completely automatic, 24 Vdc with high/low
charging rate, capable of restoring the batteries from full discharge (18
Volts dc) to full charge within 48 hours. A pilot light indicating when
batteries are manually placed on a high rate of charge shall be provided as
part of the unit assembly, if a high rate switch is provided. Charger
shall be located in control panel cabinet or in a separate battery cabinet.
2.4
ADDRESSABLE MANUAL FIRE ALARM STATIONS
**************************************************************************
NOTE: American Disabilities Act (ADA) requires that
manual alarm stations be mounted at a maximum of 1.2
m (48 inches) above finished floor (AFF) for forward
reach and 1.4 m (54 inches) AFF for side reach.
**************************************************************************
Addressable manual fire alarm stations shall conform to the applicable
requirements of UL 38. Manual stations shall be connected into signal line
circuits. Stations shall be installed on [surface] [semi-flush] [flush]
mounted outlet boxes. Manual stations shall be mounted at [1220] [1370]
[_____] mm [48] [54] [_____] inches. Stations shall be [single] [double]
action type. Stations shall be finished in red, with raised letter
operating instructions of contrasting color. Stations requiring the
breaking of glass or plastic panels for operation are not acceptable.
Stations employing glass rods [are] [are not] acceptable. The use of a key
or wrench shall be required to reset the station. Gravity or mercury
switches are not acceptable. Switches and contacts shall be rated for the
voltage and current upon which they operate. Addressable pull stations
shall be capable of being field programmed, shall latch upon operation and
remain latched until manually reset. Stations shall have a separate screw
terminal for each conductor. Surface mounted boxes shall be matched and
painted the same color as the [fire alarm manual stations] [mounting
surface].
2.5
FIRE DETECTING DEVICES
**************************************************************************
NOTE: Remove last sentence when not applicable.
**************************************************************************
Fire detecting devices shall comply with the applicable requirements of
NFPA 72, NFPA 90A, UL 268, UL 268A, and UL 521. The detectors shall be
provided as indicated. Detector base shall have screw terminals for making
SECTION 13851A
Page 19
Previous Page
