Page
62
P/N
06
‐
791
‐
4
(Rev.
4)
704
SW
10
th
Street,
P.O.
Box
610,
Blue
Springs,
Missouri
64013
‐
0610
U.S.A.
●
Phone:
(816)
229
‐
3405
●
www.fike.com
6.
OPERATION
Subject
to
the
specific
project
requirements,
the
DuraQuench
wet
pipe
water
mist
system
will
be
arranged
to
operate
automatically
as
described
in
this
section.
6.1.
Wet
Pipe
System
with
an
Alarm
Check
Valve
Upon
activation
of
an
OH
‐
VSO
nozzle
in
response
to
a
fire
event,
the
following
events
shall
occur:
1.
Water
will
begin
to
flow
through
the
activated
OH
‐
VSO
nozzle.
2.
Water
will
begin
to
flow
through
the
wet
alarm
check
valve,
activating
the
valve’s
integral
water
flow
sensor
which
is
monitored
by
the
fire
detection
and
releasing
panel.
3.
Upon
receipt
of
the
water
flow
signal,
the
fire
detection
and
releasing
panel
shall:
a.
Initiate
a
fire
alarm
signal
to
the
fire
brigade.
b.
Activate
an
exterior
water
flow
alarm
bell.
c.
Activate
interior
alarm
notification
appliances
for
building
occupant
notification.
Upon
activation
of
a
water
flow
switch,
the
following
events
shall
occur:
1.
Initiate
an
electrical
signal
to
the
fire
detection
and
releasing
panel.
2.
Upon
receipt
of
the
water
flow
signal,
the
fire
detection
and
releasing
panel
shall:
a.
Initiate
an
electrical
signal
to
the
fire
pump
controller
to
initiate
start
‐
up
of
the
fire
pump.
3.
The
system
will
discharge
on
a
continuous
basis
through
the
pipe
distribution
system
to
the
water
spray
nozzles
until
the
fire
pump
is
manually
stopped
at
the
fire
pump
controller.
6.2.
Wet
Pipe
System
with
Maintained
Excess
Pressure
Upon
activation
of
an
OH
‐
VSO
nozzle
in
response
to
a
fire
event,
the
following
events
shall
occur:
1.
Water
will
begin
to
flow
through
the
activated
OH
‐
VSO
nozzle.
2.
Water
will
begin
to
flow
through
the
wet
alarm
check
valve,
activating
the
valve’s
integral
water
flow
sensor
which
is
monitored
by
the
fire
detection
and
releasing
panel.
3.
Upon
receipt
of
the
water
flow
signal,
the
fire
detection
and
releasing
panel
shall:
a.
Initiate
a
fire
alarm
signal
to
the
fire
brigade.
b.
Activate
an
exterior
water
flow
alarm
bell.
c.
Activate
interior
alarm
notification
appliances
for
building
occupant
notification.
4.
The
static
pressure
that
is
maintained
by
the
pressure
maintenance
pump
(jockey
pump)
within
the
piping
network
will
drop
to
the
point
where
the
jockey
pump
will
not
be
able
to
keep
up
with
the
system
demand.
5.
The
continued
drop
in
pressure
in
the
piping
network
will
be
sensed
by
the
pump
controller
via
a
pressure
sensing
line
connection,
which
will
cause
the
fire
pump
to
start
due
to
the
pressure
loss.
6.
The
system
will
discharge
on
a
continuous
basis
through
the
pipe
distribution
system
to
the
water
spray
nozzles
until
the
fire
pump
is
manually
stopped
at
the
fire
pump
controller.
Summary of Contents for DuraQuench
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