Scope of Work/Materials
13850 (28 31 00) - 2
Bid No.041818-Installation of New Fire Alarm System at Adams Elementary School
3.
UL 1971
– Standard for Signaling Devices for the Hearing Impaired.
1.4
SYSTEM DESCRIPTION
A.
A new intelligent reporting, Style 7 networked, fully peer-to-peer, microprocessor-controlled fire
detection and notification system shall be installed in accordance with the specifications and as
indicated on the Drawings.
B.
Each Signaling Line Circuit (SLC) and Notification Appliance Circuit (NAC): Limited to only 80
percent of its total capacity during initial installation.
C.
Basic Performance:
1.
Network Communications Circuit Serving Network Nodes: Wired using single twisted non-
shielded 2-conductor cable or connected using approved fiber optic cable between nodes
in Class A configuration.
2.
Signaling Line Circuits (SLC) Serving Addressable Devices: Wired Class A.
3.
Initiation Device Circuits (IDC) Serving Non-addressable Devices Connected to
Addressable Monitor Modules: Wired Class A
4.
Notification Appliance Circuits (NAC) Serving Strobes and Horns: Wired Class A.
5.
On Style 6 or 7 (Class A) Configurations: Single ground fault or open circuit on Signaling
Line Circuit shall not cause system malfunction, loss of operating power, or ability to report
alarm.
6.
Alarm Signals Arriving at Control Panel: Not lost following primary power failure until
alarm signal is processed and recorded.
7.
Network Node Communications:
a.
Communicated between panels on single pair of copper wires or fiber optic cables.
b.
To enhance system survivability, ability to operate on loss of Command Center, short
or open of entire riser at Command Center shall be demonstrated at time of system
acceptance testing.
c.
Systems that are not capable of providing true Style 7 riser performance shall not be
acceptable.
8.
Signaling Line Circuits (SLC):
a.
Reside in remote panels with associated audio zones.
b.
SLC modules shall operate in peer-to-peer fashion with all other panels in system.
c.
On loss of Command Center, each remaining panel shall continue to communicate
with remainder of system, including all SLC and control functions Systems that
provide a
“Degraded” mode of operation upon loss of Command Center or short in
riser shall not be acceptable.
9.
NAC Circuits: Arranged such that there is a minimum of 1 audible device per fire alarm
zone.
10. Notification Appliance Circuits (NAC), and Control Equipment: Arranged such that loss of
any 1 NAC circuit will not cause loss of any other NAC circuit in system.
11. NAC Circuits:
a.
Electrically supervised for open and short circuit conditions.
b.
If short circuit exists on NAC circuit, it shall not be possible to activate that circuit.
D.
Basic System Functional Operation: When fire alarm condition is detected and reported by 1 of
the system alarm initiating devices, the following functions shall immediately occur:
1.
System Alarm LEDs: Flash.
