Amerex 20150, Руководство по проектированию, установке, техническому обслуживанию и перезарядке

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NOZZLE LOCATION AND AIMING FOR SHORT VERTICAL/ HORIZONTALLY
TRANSITION RUN DUCTS PROTECTED BY DUCT NOZZLE 11983
The nozzles are to be located on the centerline of the vertically run duct, 2-8 inches (5.08-20.3cm) into the
hood/duct opening. The aiming point is to be a point 3 (7.6cm) inches above the base of the horizontally run
duct and in the same vertical plane
of the
nozzle. See illustration.
DUCT PROTECTION – MODULAR APPLICATION OF MULTPLE NOZZLES LISTING
(P/N 11983)
Protecting ducts larger than the perimeter listed for a multiple nozzle coverage is a simple process. The
following example shows how the listing for duct protecting a duct with a perimeter of 100 inches using two
nozzles PN 11983 is applied to a duct with a perimeter larger than 100” but less than 166”. We must first
divide the cross sectional area of the duct into modules with a perimeter equal to or less than 100”. Check
the modules to insure they have a diagonal equal to or less than 37.2 inches. If all criteria is met, space the
duct nozzles in each module in compliance with the multiple nozzle coverage listing and 2”-8” into the
hood/duct opening.
December 2008 Section 3 Design Page 3 – 4
Amerex Restaurant Fire Suppression System (EX 4658)
3”
Note: In no case can the diagonal dimension
of each module exceed 37.2 inches (94.4 cm)
without adding additional duct nozzles.
HOOD
Vertical / Horizontal Transition
with a rise of 24” or less.
2A + 2B = PERIMETER
OR
(A + B) 2 = PERIMETER
A
B