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Integrated Fire Protection System
B
Mechanical Section - Dry-pipe Vacuum Sprinkler System - Electric Release
FM-060M-0-112B
2- Dry-pipe vacuum sprinkler system with
electric release
Note:
Numbers indicated between brackets refer to
figures 1 and 2
SIMPLIFIED and DETAILED SYSTEM TRIM
SCHEMATICS
from this section and section
D
VACUUM
SUPPLY
.
2.1 Description
The
F
IRE
F
LEX
®
VACTEC
®
system with the dry-pipe vacuum
sprinkler trim utilizes a Viking deluge valve
(A1)
to control
water flow into piping network equipped with closed
vacuum sprinklers. Under normal operating conditions,
the piping network is supervised with vacuum to ensure
against undetected leaks.
Electric release system requires an electrically operated
solenoid valve
(F1)
controlled by an approved release
control panel.
If a vacuum sprinkler is fused, or damage to a vacuum
sprinkler or to piping network occurs, a low pressure
supervisory signal from the
FLX-PC
®
(G18)
VACUUM /
PRESSURE CONTROLLER
will be sent to the release control
panel followed by an alarm pressure signal.
Dry-pipe vacuum sprinkler system is designed so the
deluge valve
(A1)
will open by the operation of the
solenoid valve
(F1)
when the
FLX-PC
®
(G18)
alarm
pressure signal operates, or when a manual pull station is
triggered. When the deluge valve
(A1)
opens, water will
flow into the piping network and out of any open vacuum
sprinklers or any opening on the piping network.
Note:
The
F
IRE
F
LEX
®
VACTEC
®
trim is provided with a
contractor's hydrostatic test water supply port handily
located on the priming trim. Simply remove the plug of the
connection and connect the test pump between this port
and the system side port located on the riser trim. Refer to
figure 2
DETAILED SYSTEM TRIM SCHEMATIC
of this section
for exact location of these connections.
2.2 Normal condition
1. Control panel
of the
F
IRE
F
LEX
®
VACTEC
®
system
a) Green lamp identified "
AC POWER
"
lights up.
b) All other lamps are off.
2. Valves
a) Main water supply valve
(D1)
is
OPEN
.
b) All upstream water supply valves are
OPEN
.
c) Priming valve
(B1)
is
OPEN
.
d) Flow test valve
(B6)
is
CLOSED
.
e) Main drain valve
(D3)
is
CLOSED
.
f) Alarm test valve
(B5)
is
CLOSED
.
g) Alarm line drain valve
(B7)
is
CLOSED
.
h) Manual emergency release valve
(B10)
is
CLOSED
(handle in vertical position).
i) Gauge valves
(B11
and
B12)
are
OPEN
.
j) System drain valve
(G10)
is
CLOSED
and water ring
cut-off valve
(G13)
is
OPEN
(see section
D
VACUUM
SUPPLY
).
k) Shut-off valve
(D4)
is
OPEN
.
3. Gauges
a) Water supply
(B12)
at water supply pressure.
b) Priming chamber
(B11)
should be equal to, or higher
than, water supply pressure
(B12)
.
c)
FLX-PC
®
displays vacuum level between -150mBAR
(-15kPa) and -180 mBAR (-18 kPa).
d) Pre-regulator
(G14)
should be 50 PSI (344 kPA).
e) Fine-adjust regulator
(G15)
should be zero; 10 PSI
(69 kPA) when vacuum pump
(G1)
is running (see
section
D
VACUUM SUPPLY
).
4. Pressure switches & settings (factory set)
a) Alarm pressure switch
(C1)
should activate when
pressurized higher than 5 PSI (34 kPa).
b) Vacuum pump control pressure switch
(G20)
should
activate when pressurized lower than 18 PSI
(124 kPa).
c)
FLX-PC
®
(G18)
should start vacuum pump
(G1)
when
vacuum is lower than -150 mBAR (-15 kPa) and stop
vacuum pump
(G1)
when vacuum reaches
-180 mBAR (-18 kPa).
d)
FLX-PC
®
(G18)
should activate a
LOW PRESSURE
supervisory when vacuum is lower than -140 mBAR
(-14 kPa).
e)
FLX-PC
®
(G18)
should activate a
HIGH PRESSURE
supervisory when vacuum is higher than -220 mBAR
(-22 kPa).
f)
FLX-PC
®
(G18)
should activate an
ALARM PRESSURE
when vacuum is lower than -130 mBAR (-13 kPa).
