revolutions of the hand wheel, or during the first 1/5th of travel distance
of the valve stem, from full open. Connection of the switch shall be under
Section [13852N INTERIOR FIRE DETECTION AND ALARM SYSTEM] [13855N ANALOG /
ADDRESSABLE INTERIOR FIRE ALARM SYSTEM]]. [Provide breakaway key operated
locks and steel chains to secure all control valves against unauthorized
closure or tampering.]
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.]
2.2.11
Test Connections
2.2.11.1
Inspector's Test Connection for Preaction Systems
Provide test connections approximately 2 meters 6 feet above the floor for
each sprinkler system or portion of each sprinkler system equipped with an
alarm device; locate at the hydraulically most remote part of each system.
Provide test connection piping to a drain location that can accept full
flow where the discharge will be readily visible and where water may be
discharged without property damage. [Discharge to a floor drain shall be
permitted only if the drain is sized to accomodate full flow.] Discharge
to janitor sinks or similar fixtures shall not be permitted. Provide
discharge orifice of same size as corresponding sprinkler orifice. [The
penetration of the exterior wall shall be no greater than [2 feet0.61 meter
] [_____] above finished grade.]
[2.2.11.2
Backflow Preventer Test Connection
Provide downstream of the backflow prevention assembly listed hose valves
with 65 mm 2.5 inch National Standard male hose threads with cap and chain.
Provide one valve for each 250 gpm 16 L/s of system demand or fraction
thereof. Provide a permanent sign in accordance with paragraph entitled
"Identification Signs" which reads, "Test Valve."
]2.2.12
Main Drains
Provide separate drain piping to discharge at safe points outside each
building [or] [to sight cones attached to drains of adequate size to
readily receive the full flow from each drain under maximum pressure].
Provide auxiliary drains as required by NFPA 13. Provide precast concrete
splash block under each exterior drain discharge. [The penetration of the
exterior wall shall be no greater than [0.61 meters2 feet] [_____] above
finished grade.] [Main drain shall also serve as the backflow preventer
test connection. Site main drain pipe and valve to support flow at system
demand.]
SECTION 13945N
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