SECTION 3 – SYSTEM DESIGN
UL EX3830 ULC EX3830
2014-NOV-10 REV. 06 PagE 3-23
KITCHEN KNIGHT II Restaurant Fire Suppression Manual
DETECTOR PLACEMENT
Detectors are required over cooking appliances and in the
duct(s) of protected ventilation hoods.
Exhaust Duct(s)
Each exhaust duct must have at least one detector installed in
the duct entrance, located in the air stream of the cooking vapors
at a maximum of 12 ft (3.6 m) into the duct. See Figure 3-39.
12 FT (3.6 m)
MaXIMUM
FIGuRE 3-39
006884PC
NOTICE
When gas appliances are used and the flue
gases from the burner are exhausted into the
duct, the detector must be kept out of the air
stream of these exhaust gases. These gases
can be very hot and could actuate the system
unnecessarily .
Duct openings that are long and narrow or
large enough to require multiple duct nozzles
may require additional detectors.
Electrostatic Precipitator
If an electrostatic precipitator is located at or near the base of
the exhaust duct, it is necessary to locate a detector below the
precipitator, at the base of the duct, and also locate one in the
duct, just above the precipitator. See Figure 3-40.
When installing the detector bracket and system conduit, make
certain they do not interfere with the operation of the precipitator.
FIGuRE 3-40
000268
