][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] [or] [Flow] 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 SYSTEM] [13852N INTERIOR
FIRE ALARM SYSTEM.] [Alarm actuating device shall have mechanical
diaphragm controlled retard device adjustable from 10 to 60 seconds and
shall instantly recycle.]
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. Gate valves
shall open by counterclockwise rotation. [Provide [a rising stem] [an
OS&Y] [a wall indicator] valve beneath each alarm]. [Check valves shall be
flanged clear opening swing-check type with flanged inspection and access
cover plate for sizes 100 mm 4 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.] [Provide double check
valve assembly type backflow preventer with OS&Y gate valves on both ends.
Each check valve shall have a drain.
Each OS&Y gate valve shall be
supervised; minimum contact ratings shall be 2.5 amps at 24 volt DC.
Provide supervision against valve closure or tampering of valve. Double
check valve assembly shall be tested and certified under ASSE 1015.]
2.2.9
Backflow Preventer
Provide [reduced pressure principle] [double check] valve assembly backflow
preventer with OS&Y gate valve on both ends. Each check valve shall have a
drain. Backflow prevention assemblies shall have current "Certificate of
Approval from the Foundation for Cross-Connection Control and Hydraulic
Research, FCCCHR List. Listing of the specific make, model, design, and
size in the FCCCHR List shall be acceptable as the required documentation."
2.2.10
Identification Signs
NFPA 13. Attach properly lettered and approved metal signs to each valve
and alarm device. [Permanently affix hydraulic design data nameplates to
the riser of each system.]
SECTION 13930N
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