Provide nickel cadmium, lead calcium, or sealed lead acid batteries and
charger. Dry cell batteries will not be permitted. Provide steel cabinet
with cylinder lock for batteries or house within control panel.
2.6.6.1
Storage Batteries
**************************************************************************
NOTE: Use only when electrical actuation is
specified.
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Provide batteries of the proper ampere-hour rating to operate the system
under standby conditions for [60] [24] hours and alarm conditions for an
additional [30] [15] minutes. Supervise batteries for low voltage and
circuit continuity. Provide calculations substantiating battery capacity.
Provide reliable separation between cells to prevent contact between
terminals of adjacent cells and between battery terminals and other metal
parts.
2.6.6.2
Battery Charger
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NOTE: Use only when electrical actuation is
specified.
**************************************************************************
Provide automatic [high and low charging rate type] charger, capable of
recovering batteries from full discharge to full charge in 48 hours or
indicate the state of battery charge.] Provide a red pilot light to
indicate when batteries are manually placed on a high rate of charge as
part of the unit assembly if high-rate switch is provided.
2.7
DETECTOR
2.7.1
Open-Area (Spot-Type) Smoke Detectors
Design for detection of abnormal smoke densities by the [ionization]
[photoelectric] principle. Provide control and power modules required for
operation integral with the main control panel. Detectors and associated
modules shall be compatible with the main control panel and shall be
suitable for use in a supervised circuit. [Detector circuits shall be of
the four-wire type whereby the detector operating power is transmitted over
conductors separate from the initiating circuit.] [As an alternate,
detector circuits of the two-wire type whereby the detector operating power
is transmitted over the initiating circuits are permitted if:]
a.
Detectors used are approved by the control panel manufacturer for
use with the control panel provided.
b.
The detectors are UL listed or FM approved as being compatible
with the control panel.
[When two-wire detectors are used, the total number of detectors on a
detection circuit shall not exceed 50 percent of the maximum number of
detectors allowed by the control panel manufacturer for that circuit and
the standby current draw of the entire system shall not exceed 50 percent
of the rated output of the system power supply modules. Additional zones
SECTION 13961N
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