SECTION 4 – SYSTEM INSTALLATION
UL EX3830 ULC EX3830
2014-NOV-10 REV. 06 PagE 4-7
KITCHEN KNIGHT II Restaurant Fire Suppression Manual
SETTING THE CONTROL HEAD
Model MCH3/NMCH3 Mechanical Control Head
Once the fusible link line is set, the control head can be placed in
the set position. Set the control head using the proper procedure
of ratcheting the detection line to raise the spring plate parallel
to the top of the control head box prior to placing the latching
arm in the slide plate. The slide plate is moved from right to
left, ensuring the bolt extending from the cam arm is in the slot
provided in the slide plate. Continue moving the slide plate to
the left until the latching arm is in the locked position. Insert the
pull pin into the hole in the slide plate above the latching arm.
This will lock the control head in the set position, eliminating
accidental actuation during the rest of the installation procedure.
See Figure 4-14.
FIGURE 4-14
006219PC
Note:
Tension must be set on fusible link detection line before
control head can be set.
Model ECH3 Electrical Control Head
Once the thermal detectors have been installed, the control
head can be placed in the set position. To set the control head,
the slide plate is moved from right to left, ensuring the bolt
extending from the cam arm is in the slot provided in the slide
plate. Continue moving the slide plate to the left until the latching
arm is in the locked position. Insert the pull pin into the hole in
the slide plate above the latching arm. This will lock the control
head in the set position, eliminating accidental actuation during
the rest of the installation procedure.
Once the Model ECH3 Electrical Control Head is in the set
position, it can be connected to the detection/actuation circuit.
!
WARNING
Before working on any electrical wiring, make certain main
power has been disconnected. Failure to disconnect main
power could cause personal injury or death if contact is made
with energized wires. all electrical wiring and connections to be
made in accordance with the authority having jurisdiction and
all local electrical codes.
NOTICE
No electrical connections shall be made
inside the con trol head. all electrical wiring
shall exit the control head through the knock-
out on the side of the box. all electrical
connections must be made in an approved
electrical box.
Connect one of the black wires on the solenoid in the control
head to the red wire of the Model MS-SPDT Electrical (snap-ac-
tion) Switch. The brown wire from the electrical (snap-action)
switch is then connected to one side of the first thermal detector
in series. Connect the other side of the first thermal detector
in series and the remaining black wire on the solenoid in the
control head to the appropriate power source after installing the
Model SM-120 Solenoid Monitor.
CAUTION
The solenoid must never be wired “hot” (not through the
electrical (snap-action) switch). If wired this way, the non-field
replaceable solenoid will be damaged and the complete
control head will require replacement.
NOTICE
a Model SM-120 Solenoid Monitor must
always be used with an Electrical Control
Head to supervise the actuation/detection
circuit.
Where electrical detection and/or actuation
is provided, supervision shall be provided in
accordance with NFPa-17a.
alarms and indicators along with a supervised
backup power source shall be provided in
accordance with NFPa 72, The National Fire
alarm Code.
Electrical wiring and equipment shall be
installed in accordance with NFPa 70,
National Electric Code or the requirements of
the authority having jurisdiction.
The Model ECH3-24 Electrical Control Head requires a 24VDC
power supply with a minimum 2a rating. The Model ECH3-120
Electrical Control Head requires a 1a, 120VaC power supply.
