SECTION 9 – APPENDIX
UL EX3470
ULC EX3470
PAGE 9-16
REV. 11
MULTIPLE NOZZLE FRYER PROTECTION CALCULATION
EXAMPLES (Continued)
Example No. 2 – Fryer With Dripboard (Continued)
Adding the protection required for the back of the frypot to
the front protection requires two 2-flow appliance nozzles
as a minimum. See Figure 9-2.
20 IN.
(508 mm)
20 IN.
24 IN.
(508 mm)
(609 mm)
10 IN.
4 IN.
(254 mm)
(101 mm)
DIVIDED LEFT TO RIGHT
Simultaneous Actuation of Multiple 120 VAC Electric AUTOMAN Regulated Release Assemblies
DUAL ELECTRIC
SWITCH (PART
NO. 423879)
ACTUATION
SOLENOID
AUTOMAN 1
2014-SEP-01
20 IN.
(508 mm)
10 1/2 IN.
(266 mm)
9 1/2 IN.
(241 mm)
4 IN. (101 mm)
DIVIDED FRONT TO BACK
FIGURE 9-2
ALL SYSTEMS MUST BE CONNECTED TO THE SAME POWER SOURCE
ACTUATION LINE
AUTOMAN 2
WIRING DIAGRAM
NFPA standards require simultaneous operation for fire suppres-
sion systems when two or more hazards can be simultaneously
involved in fire by reason of their proximity. To accomplish
simultaneous operation, the 120 VAC Electric AUTOMAN
Regulated Release Assembly can be used. This release can be
activated independently by fusible line operation exactly like the
mechanical version and can also be triggered electrically using
a snap action switch from another 120 VAC Electric AUTOMAN
Regulated Release Assembly or a Mechanical AUTOMAN
Regulated Release Assembly. The electrical wiring used to
connect from one AUTOMAN Regulated Release Assembly
24 IN.
to another will not be supervised. However, NFPA 96 allows
(609 mm)
an exception for electrically operated systems which "include
automatic mechanical detection (fusible link) and actuation as a
backup detection system."
In the case of multiple hoods sharing a common exhaust duct,
NFPA 17A requires one of two forms of simultaneous operation.
The following wiring diagrams (See Figures 3 and 4) identify two
002467
principle uses for the 120 VAC Electric AUTOMAN Regulated
Release Assembly. Refer to Components Section, Page 3-1,
Figure 3-3.
1. Simultaneous operation of all independent hood, duct, and
appliance protection systems. See Figure 9-3.
2. Simultaneous operation of any hood, duct, and appliance
protection system and the system(s) protecting the entire
common exhaust duct. See Figure 9-4.
R-102 Restaurant Fire Suppression Manual
TYPICAL FOR ADDITIONAL AUTOMAN
REGULATED RELEASE ASSEMBLIES
– UP TO 4
115 VAC
60 HZ
HOT
NEUTRAL
FIGURE 9-3
008405
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