SECTION 4 – SYSTEM DESIGN
UL EX3470 ULC EX3470
PAGE 4-72 REV. 11 2014-SEP-01
R-102 Restaurant Fire Suppression Manual
DETECTION SYSTEM REQUIREMENTS (Continued)
Detector Placement Requirements (Continued)
COOKING APPLIANCES
If the cooking appliance is located under an exhaust duct where
a detector has been mounted, it is normally not necessary to
utilize another detector for that cooking appliance, provided the
detector is not more than 12 in. (304 mm) into the duct and the
appliance has no larger cooking surface than 48 in. x 48 in.
(1219 mm x 1219 mm). See Figure 4-141.
Note: If two appliances are located under a duct opening where
a detector has been mounted and both appliances together
do not exceed a cooking surface of 48 in. x 48 in. (1219 mm x
1219 mm) and the detector is located above both the protected
appliances, it is not necessary to utilize an additional detector
provided the duct detector is not more than 12 in. (304 mm) into
the duct opening.
FIGURE 4-141
000269
Each cooking appliance with a continuous cooking surface not
exceeding 48 in. x 48 in. (1219 x 1219 mm) can be protected by
a minimum of one
detector. Cooking appliances with a continu
-
ous cooking surface exceeding 48 in. x 48 in. (1219 x 1219 mm)
must be protected by at least one detector per 48 in. x 48 in.
(1219 x 1219 mm) cooking area.
Detectors used for cooking
appliances must be located above the protected appliance
toward the exhaust duct side of the appliance. The detector
should be located in the air stream of the appliance to enhance
system response time.
Note:
For overlapping detector coverage, see Page 4-60 for
design requirements.
Detection Line Requirements
CONDUIT
Rigid conduit or 1/2 inch EMT thin-wall conduit may be used.
Standard steel conduit fittings (compression type are recom
-
mended) must be employed to properly install the detection
system. All conduit or pipe must be firmly supported. When
using pipe, make certain that all ends are carefully reamed,
deburred and blown clear of chips and scale before assembly.
NOTICE
The conduit offset can be used at the top or
bottom of the regulated release to change
direction of the conduit. The conduit offset
cannot be used with pulley tees. All other
changes in direction must be made by using
ANSUL approved pulley elbows (Part No.
423254 or 415670). See Figure 4-142.
FIGURE 4-142
000270
Fusible Link Selection
When possible, temperature readings should be taken at each
detector location to determine correct fusible link temperature
rating. Temperature can be recorded using either a maximum
registering thermometer (Part No. 15240) temperature tape or
any other accurate thermometer.
FIGURE 4-143
Select correct UL Listed fusible link(s) for installation in detec
-
tor(s) according to the temperature condition. Two styles are
available. See Figure 4-143. See Component Section for
detailed temperature ratings.
APPLIANCE
REQUIRES
SEPARATE
DETECTOR
APPLIANCE
REQUIRES
SEPARATE
DETECTOR
APPLIANCE
COVERED BY
DETECTOR
UNDER DUCT
SL STYLE
000170
A-PC STYLE
000171
TEMPERATURE RATING
STAMPED ON FUSIBLE
LINK BODY
Summary of Contents for R-102
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