SECTION 4 – SYSTEM INSTALLATION
UL EX3830 ULC EX3830
PagE 4-12 REV. 06 2014-NOV-10
KITCHEN KNIGHT II Restaurant Fire Suppression Manual
ELECTRICAL (SNAP-ACTION) SWITCH INSTALLATION
(Continued)
NOTICE
The Model ECH3 Control Head is supplied
with a Model MS-DPDT Electrical (Snap-
action) Switch. The DPDT switch is a
double switch with two sets of normally
open (N.O.) and normally closed (N.C.)
contacts. One set of contacts on the
switch must be used in the actuation/
detection circuit and cannot be used for elec-
trical output.
NOTICE
No electrical connections shall be made
inside the control head. all electrical wiring
shall exit the control head through the
knock-out on the side of the box. all elec-
trical connections must be made in an
approved electrical box.
These switches may be used to provide an electrical signal to
the main breaker and/or operate electrical accessories pro vided
the rating of the switch is not exceeded. Wiring con nections are
shown in Figure 4-24. The contact ratings for the switch are as
follows:
Contact Ratings For Electrical (Snap-Action) Switches
21 amps 1 HP, 125, 250, 277 VaC
or 2 HP, 250, 277 VaC
FIGURE 4-24
002903PC
The alarm Initiating Switch (Part No. 550077) must be used to
close a supervised circuit to the building main fire alarm panel
when the control head actuates. This will signal the fire alarm
panel that there was a system actuation in the kitchen area.
This switch can be field installed in the control head. Refer to
Instruction Sheet (Part No. 550081) included with the switch
shipping assembly, for detailed mounting instructions. Wiring
connections are shown in Figure 4-25. The switch is rated at
50ma, 28VDC.
FIRE aLaRM
CONTROL PaNEL
INITIaTINg
CIRCUIT
aLaRM INITIaTINg
SWITCH
FIRE aLaRM CONTROL PaNEL END-
OF-LINE RESISTOR (BY OTHERS)
CORRECT – SEPaRaTE INCOMINg aND OUTgOINg CONDUCTORS
IN
IN
OUT
OUT
FIGURE 4-25
004891/004905
PIPE AND NOZZLE INSTALLATION
all pipe ends shall be thoroughly reamed after cutting and all oil
and foreign matter removed from the pipe. The following proce-
dures must be followed:
1. Use Schedule 40 black iron, chrome-plated, or stainless
steel pipe and fittings. Do not use hot-dipped galvanized
iron pipe or fittings in the agent distribution piping.
2. Before assembling the pipe and fittings, make certain all
ends are carefully reamed and blown clear of chips and
scale. Inside of pipe and fittings must be free of oil and dirt.
3. The distribution piping and fitting connections, located in the
hood or the protected area, must be sealed with pipe tape.
When applying pipe tape, start at the second male thread
and wrap the tape (two turns maximum) clockwise around
the threads, away from the pipe opening.
4. Do not over-tighten, but be sure the pipe is snug. Do not
back-off sections of pipe to make them fit better. If the pipe
was cut too short, re-cut another pipe to the proper length.
CAUTION
Do not apply Teflon tape to cover or overlap the pipe opening,
as the pipe and nozzles could become blocked and prevent
the proper flow of agent.
Do not use thread sealant or pipe joint compound.
