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B
Integrated Fire Protection System
Mechanical Section - Dry-pipe Vacuum Sprinkler System - Electric Release
FM-060M-0-112B
1.6 Placing the system back in service after operation
1. Verify that all vacuum sprinklers are set and/or piping
auxiliary drain valves are
CLOSED
.
2. Verify that the system has been properly drained (see
warning note below).
CLOSE
main drain valve
(D3)
,
system drain valve
(G10)
and alarm line drain
valve
(B7)
. Verify that the manual emergency
release
(B10)
is
CLOSED
.
Warning !
It is very important to properly drain the piping
network in order to reduce the effect of corrosion.
3. Verify that the shut-off valve
(D4)
is
OPEN
.
4. The sign [
] will be displayed on the
FLX-PC
®
(G18)
.
Press and hold the push-button of the
FLX-PC
®
for
5 seconds until the sign [
] disappears to start the
vacuum pump
(G1)
.
Note:
The history display appears after 3 seconds; do not
release the push-button before the end of 5 seconds.
Solenoid valve
(G2)
should open. Excess water in
deluge valve
(A1)
will be drained by vacuum
pump
(G1).
Note:
The vacuum pump
(G1)
may not need to start after
following the sequence of the paragraph 1.7.4
OPERATION
OF THE SHUT-OFF VALVE
.
5. When vacuum pump
(G1)
stops, solenoid valve
(G2)
should close. The
FLX-PC
®
(G18)
should display the
vacuum level.
6.
OPEN
priming valve
(B1)
.
7. Reset the release control panel. Solenoid valve
(F1)
should close. Water pressure rises slowly on
gauge
(B11)
. Silence the alarm.
8.
OPEN
flow test valve
(B6)
.
PARTIALLY OPEN
main water
supply valve
(D1)
.
Note:
Do not open main water supply valve
(D1)
until
gauge
(B11)
shows stabilized pressure.
9. When full flow develops from the flow test valve
(B6)
,
CLOSE
the flow test valve.
10.
FULLY OPEN
the main water supply valve
(D1)
. Reset
the release control panel.
11. Verify that the alarm test valve
(B5)
is
CLOSED
and that
all other valves are in their "normal" operating position
(refer to paragraph 2.2
NORMAL CONDITION
of the current
section for details).
12. Check and repair all leaks.
13. Notify the local
AUTHORITY HAVING JURISDICTION
, remote
station alarm monitors, and those in the affected area
that the system is back in service.
1.7 Inspections and tests
NOTICE
: The owner is responsible for maintaining the fire
protection system and devices in proper operating
condition.
It is imperative that the system be inspected and tested on
a regular basis in accordance with NFPA-25.
The frequency of the inspections may vary due to
contaminated or corrosive water supply to the system. For
minimum maintenance and inspection requirements, refer
to NFPA-25. In addition, the
AUTHORITY HAVING
JURISDICTION
may have additional maintenance, testing,
and inspection requirements that must be followed.
WARNING !
Any system maintenance that involves placing
a control valve out of service may eliminate the fire
protection capabilities of that system. Prior to proceeding,
notify all local
AUTHORITIES HAVING JURISDICTION
.
Consideration should be given to employment of a fire
patrol in the affected areas.
1.7.1 Vacuum Supervisory/Alarm Test
To test vacuum sprinklers piping network for
LOW
PRESSURE
supervisory and
ALARM PRESSURE
1. Notify the local
AUTHORITY HAVING JURISDICTION
and
those in the area affected by the test.
2. To prevent operation of the deluge valve
(A1)
and filling
of the piping network with water during the test,
CLOSE
main water supply valve (
D1
).
3. Verify that the shut-off valve
(D4)
is
OPEN
.
4.
FULLY OPEN
the inspector's test valve on the piping
network or
PARTIALLY OPEN
main drain valve
(D3)
.
5. Verify that
LOW PRESSURE
supervisory and
ALARM
PRESSURE
signals operate within the specified pressure
settings of the
FLX-PC
®
(G18)
(refer to paragraph 2.2
NORMAL CONDITION
).
6.
CLOSE
the inspector's test valve or main drain
valve
(D3)
.
7.
CLOSE
priming valve
(B1)
.
