Alternate Ceramic/Natural Charcoal Char-broiler Protection
The R-102 system may also use the 3N nozzle for all ceramic
(lava rock) and natural charcoal char-broiler protection. The
nozzle is stamped with 3N, indicating that this is a three-flow
nozzle and must be counted as three flow numbers.
One 3N nozzle will protect a hazard which has a maximum
length of 30 in. (762 mm) and a total cooking area which does
not exceed 720 in.
2
(46451 mm
2
). The nozzle tip must be
located 14 in. to 40 in. (355 mm to 1016 mm) above the hazard
surface. The nozzle must be positioned anywhere along or
within the perimeter of the maximum cooking area and angled
to the center. See Figure 4-62.
For natural charcoal char-boiler protection, this coverage only
applies when the depth of the charcoal does not exceed 4 in.
(101 mm).
FIGURE 4-62
Wood Fueled Char-Broiler Protection
The R-102 system uses the 3N nozzle for mesquite char-broiler
protection. The nozzle is stamped with 3N indicating that this is
a three-flow nozzle and must be counted as three flow numbers.
One 3N nozzle will protect a hazard which has a maximum
length of 30 in. (762 mm) and a total cooking area which does
not exceed 720 in.
2
(46451 mm
2
). The nozzle tip must be
located 14 in. to 40 in. (355 mm to 1016 mm) above the hazard
surface. The nozzle must be positioned anywhere along or
within the perimeter of the maximum cooking area and aimed at
the center of the cooking surface. See Figure 4-63.
Mesquite logs and pieces, no larger than 4 in. (102 mm) in diam
-
eter, may be protected with a maximum allowable wood depth
of 6 in. (152 mm).
FIGURE 4-63
COOKING
AREA
COOKING
AREA
000260
40 IN.
(1016 mm)
MAXIMUM
14 IN.
(355 mm)
MINIMUM
4 IN. (101 mm)
MAXIMUM
DEPTH
000259
COOKING
AREA
COOKING
AREA
000260
6 IN. (125 mm)
MAXIMUM
DEPTH
40 IN.
(1016 mm)
MAXIMUM
14 IN.
(355 mm)
MINIMUM
000259
SECTION 4 – SYSTEM DESIGN
UL EX3470 ULC EX3470
PAGE 4-26 REV. 11 2014-SEP-01
R-102 Restaurant Fire Suppression Manual