2.2.4
[Deluge] [Preaction] Valves
Valves shall be operated by a detection system listed for releasing service
and independent of building fire alarm system. [[Deluge] [Preaction] valve
clappers shall incorporate a [mechanical] latching mechanism that will not
be affected by pressure changes in the water system.] If 150 mm 6 inch
valves are used in 200 mm 8 inch risers, provide smoothly tapered
connections. In addition to automatic operation, arrange each valve for
appurtenances at the [deluge] [preaction] valves. Provide a test detection
device for each actuation circuit adjacent to each valve which the device
controls as required by NFPA 13. [Provide remote manual releases where
indicated.] [_____.]
[2.2.5
Water Motor Alarms
Provide alarms of the approved weatherproof and guarded type, to sound
locally on the flow of water in each corresponding sprinkler system. Mount
alarms on the outside of the outer walls of each building at a location as
directed. Provide separate drain piping directly to exterior of building.
]2.2.6
Pressure Switch
Provide switch with circuit opener or closer for the automatic transmittal
of an alarm over the facility fire alarm system. Connection of switch
shall be under Section [13851N EXTERIOR FIRE ALARM SYSYTEM] [13852N
INTERIOR FIRE DETECTION AND ALARM SYSTEM]. [Alarm actuating device shall
have mechanical diaphragm controlled retard device adjustable from 0 to 60
seconds and shall instantly recycle.] Do not install a shutoff valve in
the piping between the [preaction][deluge] valve and any pressure switch.
2.2.7
Pipe Hangers and Supports
Provide in accordance with NFPA 13. Attach to steel joists with MSS SP-58,
Type 19 or 23 clamps and retaining straps. Attach to Steel W or S beams
with Type 21, 28, 29, or 30 clamps. Attach to steel angles and vertical
web steel channels with Type 20 clamp with beam clamp channel adapter.
Attach to horizontal web steel channel and wood with drilled hole on
centerline and double nut and washer. Attach to concrete with Type 18
insert or drilled expansion anchor.
2.2.8
Valves
NFPA 13. Provide valves of types approved for fire service. Valves shall
open by counterclockwise rotation. [Provide [a rising stem] [an OS&Y] [a
wall indicator] valve beneath each deluge or preaction valve.] [Check
valves shall be [flanged] clear opening swing-check type with flanged
inspection and access cover plate for sizes [100 mm50 inches][200 mm8 inches
] [_____] and larger.] [Provide OS&Y gate valve in piping to sprinklers
protecting elevator hoistways, machine rooms, and machinery spaces in
accordance with ASME A17.1.]
2.2.8.1
Valve Supervision
Provide supervision of each control valve against closure and tampering in
accordance with NFPA 13. [Provide switch with SPDT (Form C) dry contacts
for the automatic transmittal of a supervisory signal over the facility
fire alarm system; minimum switch contact rating shall be 2.5 amperes at 24
VDC. A supervisory signal shall be initiated during the first two
SECTION 13945N
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