hello everyone john eller with the cash
today i'm in our denver display center
talking about installing and wiring the
manual activation device for the core
and electric wet chemical fire systems
the device i'll be showing in this video
is for demonstration purposes only
and shouldn't be used as an example of a
for more information on how these fire
systems work you can visit our website
and click on the products tab
before we get started let's talk safety
it's recommended that you use the proper
personal protective equipment for the
especially the use of eye protection and
remember when working on any electrical
circuit or control panel be sure to
de-energize the circuit at the breaker
and verify the circuit is dead with a
multimeter before starting any work
the core and electric wet chemical
control boards also have a battery
which will need to be disconnected as
well verify that there are no lights
on on the control board before starting
you're now ready to start the manual
activation device install and wiring
now let's get started the manual
activation device is used to manually
activate the core or electric wet
chemical fire suppression system
once pressed the normally open contacts
closing the supervised loop and
when pressed the switch will lock into
position preventing the fire system from
to unlock or reset the manual activation
simply twist the knob to the right and
allowing for a system reset when
installing the manual activation device
four 16 to 18 gauge wires long enough to
run from the manual activation device
to the core or ewc control panel a
a multimeter a small flathead and
the manual activation device needs to be
mounted at a point of egress
10 to 20 feet away from the hood and 42
to 48 inches above finished floor
but check with your local ahj for final
the manual activation device is designed
to be flush mounted to the wall
so your junction box would have to be
if flush mounting is not possible the
junction box can be surface mounted
using a separately supplied surface
note a junction box and conduit must be
used for proper installation
and make sure all conduit is deburred to
once the junction box and conduit are
follow these steps to properly terminate
the wires to the manual activation
again the switch i'm using here is for
to be able to clearly show the switch
wiring i used two separate
18 2 wire runs from the switch to the
and i put the two green wires under the
normally open terminal on the switch
and the two white wires under the common
first stripped and installed the two
white wires under the common terminal of
making sure not to twist the wires
together i'll explain the importance of
next i stripped and installed the two
green wires into the normally open
again ensuring not to twist the wires
give each wire a tug to ensure all the
now let me explain why we don't twist
the system utilizes a supervised loop
meaning that we monitor each of the four
so if the wires are twisted together and
happen to fall out of the switch the
system wouldn't know because that half
of the loop would still have continuity
but the switch would not work when
needed now let me demonstrate the
monitoring first i remove one wire from
the switch and you see that we get a
with both wires removed from the same
terminal we still have the fault
but if these wires are twisted together
but the switch would obviously not work
in an emergency and no one would have
complete the install of the switch
ensuring the wires are protected
center the protective cover over the
push button and install with the four
now for the control panel terminations
first make sure the ac power is turned
and the battery supplies unplugged from
strip the two wires that were wired to
the common terminal on the switch
in this example the two white wires and
and the other to terminal 104 tighten
and give the wire a little pull to
insert the remaining two wires from the
normally open terminal on the switch
the green wires one to terminal 102
and the other to terminal 103 tighten
down the screws and give the wire a
now let's give it a test to ensure we
have everything wired correctly and the
switch is functioning properly
set your multimeter to ohms and check
and 104 you should read 0 ohms or
next check between terminals 102 and 103
this should also read 0 ohms or have
finally conduct the same test between
and between 103 and 104 both of these
tests should show an open circuit
that's it you're all set you're now
power and reconnect the battery backup
for more questions on this or any other
products please call our technical
or email support at castservice.com