Potter PFC-4410RC User Manual
Page 52
52
PFC-4410RC • 5403550 • REV Q • 11/12
The following programs are for chemical or gas extinguishing systems. Selecting the CHEMICAL mode allows the use of a pre-
discharge timer and an abort circuit. The timer defaults to 60 seconds for all alarm zones programmed as other than MANUAL
RELEASE. The MANUAL RELEASE default timer is 30 seconds. The system offers the programmer the ability to change the
default timers to shorter times.
Systems intended for the release of Halon 1301 as described in NFPA 12A, or clean agents as described in NFPA 2001, shall
have provision for a pre-discharge notification circuit. If this signal is required to be separate and/or distinct from the evacuation
signal, two notification circuits are required. One shall be programmed as FIRST ALARM. It will provide a steady output upon
activation of any initiating zone programmed as an alarm zone. This is the evacuation signal. If a temporal signal is required,
notification appliances such as Amseco model HW-24R or others that can produce a temporal tone shall be used. This allows the
use of strobes and horns on the same circuit. The other notification circuit shall be programmed as SECOND ALARM. It will
provide a steady output upon activation of a second initiating zone programmed as an alarm zone. This is when the pre-discharge
timer would start and would be the pre-discharge signal. If a temporal signal is required, notification appliances such as Amseco
model HW-24R or others that can produce a temporal tone shall be used. This allows the use of strobes and horns on the same
circuit. If a separate signal for discharge were required, a third notification circuit would be used that would be programmed to
operate whenever the release circuit is activated.
Zones programmed as MANUAL RELEASE will activate outputs programmed as SECOND ALARM, even if the MANUAL
RELEASE zone is the first alarm zone activated. SECOND ALARM is intended to be used as a pre-discharge signal for cross
zone applications. Refer to page 50 for a complete description of first and second alarm requirements and operation.
NOTE:
On programs 20-28, the SUP 1/Abort zone defaults to Abort.
Z
ones
programmed
as
m
anual
r
elease
Cannot
be
aborted
. i
f
it
is
neCessary
to
abort
a
manual
release
Zone
,
that
Zone
must
be
programmed
as
d
eteCtion
. i
f
the
pre
-
disCharge
timer
is
set
at
0,
the
abort
CirCuit
Will
not
stop
the
release
.
NFPA 12 prohibits the use of abort circuits on suppression systems deploying carbon dioxide.
Systems designed and installed in accordane with NFPA 2001 shall be provided with a mechanical manual release system.