10
400E-Y Pre-Action
4.
Placing in Service/Resetting
The Pre-Action valve and the control trim shall be placed in Service in accordance to the most recent IOM
procedures for the specific model.
4.1
Place the Detecting System's circuit in service and test regulatory circuits in the Release Control Panel,
locating and replacing any faulty items. Test supervisory circuits in releasing control panel.
4.2
Apply supervisory air pressure to the system’s piping and set the pressure at
2.5 ± 0.1 barg (
36.5 ±1.5 psi)
.
4.3
De-energize the Solenoid Valve by resetting the Electric Control Panel.
4.4
Close all emergency release valves.
4.5
Close All Drain Valves.
4.6
Open the priming-line valve, operate the reset button, this allows upstream water pressure to fill the Water
Control Valve’s control chamber.
4.7
When the control chamber pressure gauge indicates full upstream pressure and is no longer rising, the
release system is reset.
4.8
Slowly Open the supply Isolating Valve and check that no water flows into the system.
4.9
Depress the Drip-Check and drain any water from the downstream side of the valve.
4.10
Test settings for the Low Air-Pressure Switch (P2) by releasing air from the Sprinkler Test Valve or gradually
open the Sprinkler-System Drain Valve. The Low Air-Pressure Switch should be set to operate at
2.2 barg
(32 psi).
The system is now operational and in a standby mode. Ensure that the following Set Conditions are met.
Table No.2: Set Conditions (Normal Conditions) Table
Item Status
All Main Isolating Valves
OPEN
and sealed with tamperproof seals
All Manual Releases
CLOSE
position and sealed
Alarm Shut-Off Valve (11A)
OPEN
position
Priming Ball Valve (18B)
OPEN
Control-Chamber Gauge
OPEN
gauge valve, the gauge indicates control-chamber pressure
Upstream Pressure Gauge
OPEN
gauge valve, the gauge indicates the supply pressure
Drip-Check Device (19B)
VENTED
: Push the knob to confirm that there is no seat leakage
Control Panel & Detections
Are in service and are stand-by
Supervised Air System
The pressure gauge shows 2.5 ± 0.1 barg (36.5 ±1.5 psi) and stable
Releasing Devices
CLOSED
with no leaking
5.
Maintenance
Bermad Pre Action Valve requires no lubrication, packing or tightening and require minimum maintenance
WARNING
: Do not turn off the water supply to make repairs without placing a roving fire patrol in the area
covered by the system. The patrol should continue until the system is back in service.
A.
Prior to turning off any valves or activating any alarms, notify local security guards and the central alarm
station, if used, so that a false alarm will not be raised.
B.
In any of the following inspections or testing procedures, if an abnormal condition exists, see "Abnormal
Conditions" for possible cause and corrective action.
C.
See NFPA Pamphlet No. 25 and also relevant publications by authorities having jurisdiction
.
