SECTION 3 – SYSTEM DESIGN
UL EX3830 ULC EX3830
2014-NOV-10 REV. 06 PagE 3-5
KITCHEN KNIGHT II Restaurant Fire Suppression Manual
NOZZLE COVERAGE AND PLACEMENT (Continued)
Appliance Protection (Continued)
1. Fryers without Drip Board
(19 in. x 19 1/2 in. maximum)
(482 mm x 495 mm)
Two nozzles are available for fryer protection: High proxim-
ity and low proximity.
The Model 2H nozzle is used for high proximity fryer protec-
tion. This nozzle is a two flow nozzle. The nozzle must be
located
anywhere within the perimeter
of the hazard area,
24 in. to 48 in. (610 mm to 1219 mm) above the cooking
surface of the appliance and aimed at the center of the
cooking area. See Figure 3-8.
The Model 2L nozzle is used for low proximity fryer protec-
tion. This nozzle is a two flow nozzle. The nozzle must be
located
anywhere on the perimeter
of the hazard area, 13
in. to 24 in. (330 mm to 609 mm) above the cooking surface
of the appliance and aimed at the center of the cooking
area. See Figure 3-8.
006229PC
LOW
PROXIMITY
NOzzLE
LOCaTED
aNYWHERE
ON
THE
PERIMETER
HIgH
PROXIMITY
NOzzLE
LOCaTED
aNYWHERE
wITHIN
THE
PERIMETER
FRYERS wITHOuT
DRIPBOARDS
006178PC
OF
HazaRD
aREa
2H
2H, 2L
2L
48 IN. (1219 mm)
EDgE OF
HazaRD
aREa
13 IN.
(330 mm)
24 IN.
(609 mm)
FIGuRE 3-8
1a. Fryers with Drip Board
The maximum single nozzle protection dimensions depend
on the dimensions of the fry pot only.
For fry pots with maximum dimensions of 18 in. (457 mm)
on the longest side and 324 in.
2
(20903 mm
2
) max. area,
use
overall
dimensions of 27 3/4 in. (704 mm) on the
longest side and 500 in.
2
(32258 mm
2
) max. area.
For fry pots with maximum dimensions exceeding 18 in. x
324 in.
2
(457 mm x 20903 mm
2
), but no greater than 19 1/2
in. (495 mm) on the longest side and 371 in.
2
(23935 mm
2
)
max area, use
overall
dimensions of 25 3/8 in. (644 mm)
on the longest side and 495 in.
2
(31935 mm
2
) area.
Two nozzles are available for fryer protection: High proxim-
ity and low proximity.
The Model 2H Nozzle (Part No. 551028) is used for high
proximity fryer protection. This nozzle is a two flow nozzle.
The nozzle must be located
anywhere within the perime-
ter
of the hazard area, 24 in. to 48 in. (610 mm to 1219 mm)
above the cooking surface of the appliance and aimed at the
center of the cooking area. See Figure 3-9.
The Model 2L nozzle is used for low proximity fryer protection.
This nozzle is a two flow nozzle. The nozzle must be located
anywhere on the perimeter of the hazard area, 13 in. to 24 in.
(330 mm to 609 mm) above the cooking surface of the appliance
and aimed at the center of the cooking area. See Figure 3-9.
006178PC
OF
HazaRD
aREa
2H
2H, 2L
2L
48 IN.
(1219 mm)
24 IN.
(609 mm)
13 IN.
(330 mm)
EDgE OF
HazaRD
aREa
006230PC
LOW
PROXIMITY
NOzzLE
LOCaTED
aNYWHERE
ON
THE
PERIMETER
HIgH
PROXIMITY
NOzzLE
LOCaTED
aNYWHERE
wITHIN
THE
PERIMETER
FRYERS wITH
DRIPBOARDS
FIGuRE 3-9
1.b Fryers – Multiple Nozzle Protection
Fryers exceeding the coverage of a single nozzle can
be divided into modules. Each module must not exceed
the maximum area allowed for a single nozzle. However,
when utilizing multiple nozzle protection, the longest side
allowed for a fryer with drip board can be used, regardless
of whether the fryer has a drip board or not.
The maximum size fryer that can be modularized is 864 in.
2
(55741 mm
2
).
Design requirements for multiple nozzle fryers are broken
down as follows:
1. If the fryer includes any dripboard areas, measure both
the internal length (front to back) and width of the frypot
portion. Then measure the internal length and width of
the overall hazard area including any dripboard areas.
Determine the area of both the frypot and the area of the
overall vat by multiplying corresponding length and width
dimensions.
2. Divide the frypot or overall vat into modules, each of
which can be protected by a single nozzle, based on the
maximum dimension and area coverage of the nozzle as
specified in Table 3-2: Design.
• If the module considered does not include any portion
of the dripboard, use only the maximum frypot area
and maximum dimension listed in Table 3-2: Design.
• If the module considered includes any dripboard areas,
use both the maximum frypot area and dimension
listed in Table 3-2: Design, and the maximum overall
area and dimension listed in Table 3-2: Design.
3. None of the maximum dimensions may be exceeded.
If either the maximum frypot or the overall sizes are
exceeded, the area divided into modules will need to
be redefined with the possibility of an additional nozzle.
