SECTION 3 – SYSTEM DESIGN
UL EX3830 ULC EX3830
2014-NOV-10 REV. 06 PagE 3-1
KITCHEN KNIGHT II Restaurant Fire Suppression Manual
GENERAL
The KITCHEN KNIgHT II Restaurant Fire Suppression System
may be used on a number of different types of restaurant
cooking appliances and hood and duct configurations. The
design information listed in this section deals with the limitations
and parameters of this pre-engineered system. Those individ-
uals responsible for the design of the KITCHEN KNIgHT II
system must be trained and hold a current PYRO-CHEM certifi-
cate in a KITCHEN KNIgHT II training program.
NOZZLE COVERAGE AND PLACEMENT
This section will provide guidelines for determining nozzle
type, positioning, and quantity for duct, plenum, and appliance
protection.
Duct Protection
It is not required that the fan be shut down or the exhaust duct
be dampered for the system to operate properly.
all duct protection is UL Listed without limitation of maximum
duct length (unlimited length). This includes all varieties of
ductworks both horizontal and vertical including ducts that run at
angles to the horizontal and ducts with directional bends.
Duct protection requires that a nozzle be positioned to discharge
into the duct. Two nozzles are available for duct protection.
The Model IL Duct Nozzle (Part No. 551026) is a one flow nozzle.
a single IL nozzle is capable of protecting square or rectangular
ducts with a maximum perimeter of 50 in. (1270 mm) (maximum
side of 16 3/4 in. (425 mm)), with the diagonal being a maximum
of 18 3/4 in. (476 mm). It can also protect a round duct with a
maximum diameter of 16 in. (406 mm).
The Model 2D Duct Nozzle (Part No. 551038) is a two flow
nozzle. a single 2D nozzle is capable of protecting square
or rectangular ducts with a maximum perimeter of 100 in.
(2540 mm), with the diagonal being a maximum of 37 3/8 in.
(949 mm). It can also protect a round duct with a maximum
diameter of 31 7/8 in. (809 mm).
When two 2D duct nozzles are used to protect a single duct,
the cross sectional area of the duct must be divided into two
equal symmetrical areas. The nozzle must then be installed on
the centerline of the area it protects and aimed directly into the
duct opening.
The nozzle(s) must be installed on the centerline of the duct,
with the tip located 0 to 6 in. (0 to 152 mm) into the opening, and
aimed directly into the duct opening. See Figure 3-1.
In installations where a UL listed damper assembly is employed,
the duct nozzle can be installed beyond the 6 in. (152 mm)
maximum, to a point just beyond the damper assembly that will
not interfere with the damper. Exceeding the maximum of 6 in.
(152 mm) in this way will not void the UL listing of the system.
1/2 L
1/2 W
L
W
IL OR 2D
NOzzLE
0-6 IN. (0-152 mm)
INTO DUCT
006172PC
FIGuRE 3-1
