assembly shall be provided in accordance with NFPA 13. Water motor alarm
assembly shall include a body housing, impeller or pelton wheel, drive
shaft, striker assembly, gong, wall plate and related components necessary
for complete operation. Minimum 20 mm 3/4 inch galvanized piping from the
body housing shall be provided between the housing and the alarm check
valve. Drain piping from the body housing shall be minimum 25 mm 1 inch
galvanized and shall be arranged to drain to the outside of the building.
Piping shall be galvanized both on the inside and outside surfaces.]
2.15.5
Valve Supervisory (Tamper) Switch
Switch shall be suitable for mounting
to the type of control valve to be
supervised open. The switch shall be
tamper resistant and contain one set
of SPDT (Form C) contacts arranged to
transfer upon removal of the housing
cover or closure of the valve of more
than two rotations of the valve stem.
2.16
NOTIFICATION APPLIANCES
**************************************************************************
NOTE: The notification appliances are for providing
local notification of a sprinkler system operation.
These devices are not intended to provide general
building fire alarm evacuation. Fire alarm
evacuation systems are addressed in 16721
INTERCOMMUNICATION SYSTEM.
**************************************************************************
Notification appliances shall be suitable for connection to supervised
alarm indicating circuits. Appliance shall have a separate screw terminal
for each conductor. The surface of the appliance shall be red in color.
2.16.1
Alarm Bell
Bell shall be 250 mm 10 inch diameter, surface-mounted vibrating type with
matching back box. Sound output shall be a minimum of [85] [_____] DBA at
3000 mm 10 feet. Bell shall operate on nominal 24 VDC. Bells shall have
screw terminals for in-out wiring connection. Bells used in exterior
locations shall be specifically listed or approved for outdoor use and be
provided with metal housing and protective grilles.
2.16.2
Alarm Horn
Horn shall be surface mounted, with the matching mounting back box [surface
mounted] [recessed] [[single] [double] projector,] [grill and] vibrating
type suitable for use in an electrically supervised circuit. Horns shall
operate on nominal 24 VDC and have screw terminals for in-out wiring
connection. Sound output shall be a minimum of [85] [_____] DBA at 3000 mm
10 feet. Horns used in exterior locations shall be specifically listed or
approved for outdoor use and be provided with metal housing and protective
grills.
2.17
WIRING
Wiring for alternating current (AC) circuits shall be 12 AWG minimum.
Wiring for low voltage direct current (DC) circuits shall be No. [16] [14]
AWG minimum. Power wiring (over 28 volts) and control wiring shall be
isolated. Wiring shall conform to NFPA 70. System field wiring shall be
solid copper and installed in electrical metallic tubing or in metallic
conduit, except rigid plastic conduit may be used under slab-on-grade.
SECTION 13945A
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