identification plates for all lamps and switches. A single open or ground
fault condition in any detection or actuation circuit shall not result in
any loss of system function, but shall cause the actuation of system
trouble signals. A ground fault condition or single break in any other
circuit shall result in the activation of the system trouble signals.
[Supervision of wiring external to the control panel for mechanical
equipment shutdown is not required, provided a break in such wiring will
cause the associated mechanical equipment to shut down.] Loss of AC power,
a break in the standby battery power circuits, or abnormally low battery
voltage shall also result in the operation of the system trouble signals.
The abnormal position of any system switch in the control panel shall also
result in the operation of the system trouble signals. Trouble signals
shall operate continuously until the system has been restored to normal at
the control panel. Provide a 100 mm 4 inch remote system trouble bell,
installed [in a constantly attended area] [where shown], arranged to
operate in conjunction with the integral trouble signals of the panel.
Provide remote bell with a rigid plastic or metal identification sign which
minimum of 25 mm one inch high. Panel shall be provided with the following
switches:
1.
Trouble silencing switch which transfers trouble signals to an
indicating lamp. Upon correction of the trouble condition,
audible signals will again sound until the switch is returned to
its normal position, or the trouble circuit shall be automatically
restored to normal upon correction of the trouble condition.
2.
Evacuation alarm silence switch which when activated will silence
all alarm devices and cause operation of system trouble signals.
[3.
[Master box] Disconnect switch which when activated will
disconnect the system from the base fire alarm system and cause
operation of the Halon system trouble signals.]
System control panel shall be UL Fire Prot Dir listed or FM P7825 approved
for extinguishing system control (releasing device service).
2.4
SECONDARY POWER SUPPLY
Supply shall include nickel cadmium, lead calcium or sealed lead acid
batteries and charger. Drycell batteries are not allowed. House batteries
in a well constructed steel cabinet with cylinder lock.
2.4.1
Storage Batteries
Provide batteries of adequate ampere-hour rating to operate the system
under supervisory conditions for 60 hours at the end of which time
batteries shall be capable of operating the entire system in a full alarm
condition for not less than 30 minutes. Provide calculations
substantiating the battery capacity. Provide reliable separation between
cells to prevent contact between terminals of adjacent cells and between
battery terminals and other metal parts.
2.4.2
Battery Charger
Provide completely automatic high/low charging rate type charger capable of
recovery of the batteries from full discharge to full charge in 24 hours or
indicate the state of battery charge. Provide a red pilot light to
SECTION 13966N
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