Those located on the wall shall have the top of the sensor at
least 100 mm 4 inches below the ceiling, but not more than 300 mm
12 inches below the ceiling. In raised floor spaces, the smoke
sensors shall be installed to protect 20.9 square meters 225
square feet per sensor. Install smoke sensors no closer than 1525
mm 5 feet from air handling supply outlets.]
[e.
Graphic Annunciator: Locate the graphic annunciator as shown on
the drawings. Surface mount the panel, with the top of the panel
1830 mm 6 feet above the finished floor or center the panel at
[1525] [_____] mm [5] [_____] feet, whichever is lower.]
[f.
Water Flow Detectors and Tamper Switches: Locate water flow
detectors and tamper switches [where shown on the drawings] [at
each supervised] sprinkler valve station.]
[g.
Firefighter Telephones: Locate wall mounted in each stair at
each floor landing, in each elevator lobby, and in each elevator
cab 1220 mm 4 feet above the finished floor.]
[h.
The modification of any fire alarm system and the procedures
shall comply with the requirements of NFPA 241.]
[3.2
DISCONNECTION AND REMOVAL OF EXISTING SYSTEM
Fire alarm control panels and fire alarm devices disconnected and removed
shall be turned over to the Contracting Officer.
a.
The existing fire alarm and smoke detection system shall remain in
operation at all times during the installation and commissioning
of the new system. Once this new system is on-line and accepted by
the Government, remove the old system. As new equipment is
installed, label it "NOT IN SERVICE." Upon acceptance, remove
labels.
b.
Disconnect and remove the existing fire alarm and smoke detection
systems where indicated and elsewhere in the specification.
c.
Properly dispose of fire alarm outlet and junction boxes, wiring,
conduit, supports, and other such items.
][3.3
CONNECTION OF NEW SYSTEM
The following new system connections shall be made during the last phase of
construction, at the beginning of the preliminary tests. New system
connections shall include:
[a.
Connection of new control modules to existing magnetically held
smoke door (hold-open) devices.]
[b.
Connection of new elevator recall smoke sensors to existing
wiring and conduit.]
[c.
Connection of new system transmitter to existing base fire
reporting system.]
Once these connections are made, system shall be left energized and new
audio/visual devices deactivated. Report immediately to the Contracting
Officer, coordination and field problems resulting from the connection of
SECTION 13855N
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