Tyco Fire Product CENTRAL Attic Instruction Manual

CENTRAL
Specific Application
Attic Sprinklers™
TM
Back to Back , Single Directional
Fast Response Glass Bulb or Fusible Link Automatic Sprinklers
Tyco Fire Products --- www.centralsprinkler.com
451 North Cannon Avenue, Lansdale, Pennsylvania 19446 --- USA
Customer Service/Sales: Tel: (215) 362-0700 / Fax: (215) 362-5385
Technical Services: Tel: (800) 381-9312 / Fax: (800) 791-5500
General
Description
The Specific Application Attic Sprinklers
are the evolution of fire sprinklers for attics.
The Specific Application Attic Sprinklers
provide the best fire protection in an attic
while saving cost by using extended
coverage spacing. The Specific Applica-
tion Attic Sprinklers have undergone the
most extensive fire testing ever done for
attics and are allowed for use under their
specific application guidelines by U.L. and
NFPA.
The Specific Application Attic Sprinklers
are the first sprinklers to be:
• Listed for extended coverage in
combustible construction.
• Full-scale fire tested in both wet and dry
system scenarios.
• Full-scale tested, for Listing in wood
truss construction.
• Listed for specific pitches of roof slope.
The Specific Application Attic Sprinklers
provide the best level of protection and
control cost by eliminating the need for
additional sprinklers and the associated
cost. There is just one branch line along
the ridge for the entire building unless
there is a need for single directional or hip
sprinklers. In that case, there is still only
one line in each area. For example, a
system in a 60'-0" (18,3 m) wide attic
would use 5 branch lines to cover the
main portion of the building and several
off-set branch lines to cover the hip area.
With the attic sprinklers, there is just one
line down the ridge and one down each
slope of the hip. This is approximately
80% less pipe that needs to be installed.
This saves the cost of the pipe, fittings,
hangers, and associated labor for three
branch lines. Also the volume of the
system is reduced. This could reduce the
size of the dry pipe valve or allow the 60
second requirement to be met without an
accelerator.
The other cost reduction is in the new
Listing of BlazeMaster CPVC for Attic
ATTIC
TM
& HIP
spaces feeding the wet system sprinklers
below the ceiling. Traditionally
BlazeMaster CPVC has been used on the
lower floors in the joist space above a
ceiling that does not require sprinklers.
The cost of using CPVC on those floors
can now be translated to the upper floor
even if sprinklers are required in the attic.
There are three (3) models of the Specific
Application Attic Sprinklers, Back to Back
(dual directional), a Single Directional and
a Hip sprinkler. The Back to Back and
Single Directional sprinklers have three
separate versions that are used for
different roof pitches. The pitches can
vary from a minimum of 4 in 12 to a
maximum of 12 in 12.
The Back to Back (dual directional)
The Back to Back Specific Application
Attic Sprinkler, named so because it
performs like two sidewall sprinklers
placed back to back with one operating
element, throws a narrow but long pattern.
The narrow spacing along the ridge
serves two purposes. The response time
is reduced by having the sprinklers no
farther than 6'-0" (1,8 m) apart and the
spray can be concentrated in the throw
direction to obtain a pattern that will cover
up to 30'-0"(9,1m) each side when
measured horizontally. The three different
styles account for different roof slopes and
the two different orifice sizes allow lower
flows and pressures for smaller spacing.
The Back to Back requires only one line to
be run down the ridge of the attic to cover
both sides. Be sure that it is installed
vertically, not angled with the slope, and
the correct model is used to compensate
for the slope.
The Single Directional
The Single Directional is much like a
conventional vertical sidewall. However,
the pattern is a narrow, long throw like the
Back to Back. The Single Directional is
basically half a Back to Back Specific
Application Attic Sprinkler. The use is
primarily for attics that have shear walls
running to the roof sheathing. These
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TM
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Specific
Application
Attic Sprinklers
3-01
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No. 6-1.0