shall be galvanized steel in accordance with ASTM A 795/A 795M or ASTM A
53/A 53M.
2.7.4
Low Air Pressure Switch
Each preaction system shall be provided with an air pressure switch
connected to the control panel. Upon reduction of supervisory air pressure
to approximately [70] [_____] kPa, [10] [_____] psi, the low air pressure
switch shall actuate the audible alarm device and a red low-air alarm light
on the control panel annunciator.
2.8
WATER MOTOR ALARM ASSEMBLY
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NOTE: Coordinate this paragraph with paragraph
Waterflow Alarm; delete parts not used.
**************************************************************************
Assembly shall include a body housing, impeller wheel, drive shaft, striker
assembly, gong, wall plate and related components necessary for complete
operation. Minimum 20 mm (3/4 inch) 3/4 inch galvanized piping shall be
provided between the housing and the automatic water control valve. Drain
piping from the body housing shall be minimum 25 mm (1 inch) 1 inch
galvanized steel and shall be arranged to drain to the outside of the
building. Piping shall be galvanized both on the inside and on the outside
surfaces.
2.9
FIRE DEPARTMENT CONNECTION
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NOTE: The designer will coordinate the desired
location of the fire department connection with and
verify the type of threads used by the fire
department serving the building where the sprinkler
system is being installed.
**************************************************************************
Fire department connection shall be [projecting] [flush] type with cast
brass body, matching wall escutcheon lettered "Auto Spkr" with a [polished
brass] [chromium plated] finish. The connection shall have two inlets with
individual self-closing clappers, caps with drip drains and chains. Female
inlets shall have 65 mm 2-1/2 inch diameter American National Fire Hose
Connection Screw Threads (NH) per [NFPA 1963][_____].
2.10
SPRINKLERS
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NOTE: The designer will indicate on the contract
drawings the type of sprinkler heads for each area
if more than one type of sprinklers is to be
provided. Delete sprinkler types from this
paragraph that are not intended for use in the
system(s) used in the contract.
Areas that are classified as light hazard will be
equipped with quick response sprinklers.
**************************************************************************
Sprinklers for preaction systems shall be automatic, fusible solder or
SECTION 13945A
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