]2.2.23
Automatic Transmitters
[2.2.23.1
Telegraphic Transmitter
Provide transmitter of the electric motor-driven or pre-wound spring
mechanism type which shall transmit not less than four rounds of code.
When motor-driven transmitters are provided, the motor shall be connected
to a supervised circuit in a control panel. Provide metallic or rigid
plastic code number plates on the exterior face of transmitters.
Transmitters shall be designed to provide the same features as the fire
alarm boxes for electrically supervised, coded positive noninterfering type
and shall have the ability to transmit signals on grounded or open
circuits. Activation of box when a single open fault is present on
exterior fire alarm circuit shall have box to idle for one complete round
only, then immediately transmit four complete code rounds via the box earth
ground connection. Transmitter shall have a local energy type auxiliary
tripping device. Code wheel shall be metallic and box code shall be as
directed by the Contracting Officer.
][2.2.23.2
Radio Transmitter and Interface Panels
Provide radio transmitter with antenna that is compatible with the existing
supervising station fire alarm system. Transmitter shall have a means to
transmit alarm, supervisory, and trouble conditions via a single
transmitter. Provide transmitters in accordance with applicable portions
of [NFPA 72,] Federal Communications Commission (FCC) 47 CFR 90. Protect
the antenna from physical damage. Transmitter shall have a source of power
for operation which conforms to NFPA 72. Transmitter shall be capable of
initiating a test signal daily at any selected time.
][2.2.23.3
Digital Alarm Communicator Transmitter (DACT)
Provide DACT that is compatible with the existing supervising station fire
alarm system. Transmitter shall have a means to transmit alarm,
supervisory, and trouble conditions via a single transmitter. Transmitter
shall have a source of power for operation which conforms to NFPA 72.
Transmitter shall be capable of initiating a test signal daily at any
selected time. Transmitter shall be arranged to seize telephone circuits
in accordance with NFPA 72.
][2.2.23.4
Signals To Be Transmitted to the Base Receiving Station
The following signals shall be sent to the base receiving station:
[a.
Sprinkler water flow]
[b.
Manual pull stations]
[c.
Smoke detectors]
[d.
Duct smoke detectors]
[e.
Sleeping room smoke detectors]
[f.
Heat detectors]
[g.
Sprinkler valve supervision]
[h.
Fire pump running]
SECTION 13855N
Page 36
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