door for each zone initiating circuit. Provide prominent rigid plastic or
metal identification plates for all lamps and switches. [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 internal
trouble signals of the panel. Provide remote bell with a rigid plastic or
metal identification sign which reads "Carbon Dioxide System Trouble."
Lettering on identification sign shall be a minimum of one inch high.]
System control panel shall be UL listed or FM approved for use in carbon
dioxide fire extinguishing system control (releasing device service).
[Provide supervised isolation switch to permit testing or servicing of
electrical control system without tripping of carbon dioxide system.]
2.6.5.1
Trouble Signals
A single open or ground fault condition in detection (initiating) 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 abnormal AC
power or 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.
2.6.5.2
Panel Switches
Panel shall be provided with the following switches:
a.
Trouble silencing switch which transfers trouble signals to an
indicating lamp. Upon correction of the trouble condition,
audible signals shall 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. The
silencing switch shall be a momentary action, self-resetting type.
b.
Evacuation alarm silence switch which when activated shall silence
associated alarm devices and cause operation of system trouble
signals.
c.
Individual zone disconnect switches which when operated shall
disable only their respective initiating circuit and cause
operation of the system and zone trouble signals.
d.
Reset switch which when activated shall restore the system to
normal standby status after the cause of the alarm has been
corrected.
e.
Lamp test switch.
2.6.6
Secondary Power Supply
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NOTE: Use only when electrical actuation is
specified.
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SECTION 13961N
Page 14
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