General Information
April 2020 1-16 06-237619-001
1-8 RELEASE MODES
The system is capable of electric and manual actuation and can be released by one or more of
the following methods:
1-8.1 Automatic Release
The fire detection and control panel will determine that a detector has entered the alarm state.
In response to this, the panel will initiate a visual or audible alarm. When a second detector
enters the alarm state and after the preset discharge delay has expired, the panel energizes
the solenoid valve on the master cylinder.
1-8.2 Manual Remote Release
Note: Where allowed by local Authority Having Jurisdiction.
Remote manual release can be achieved by operating the remote manual release station or
operating the manual release facility on the extinguishing control panel.
1-8.3 Manual Emergency Release
In the unlikely event of total power failure and total drainage of the emergency batteries, the
cylinder bank can be manually released by removing the locking pin and turning the handle on
the manual release unit (fitted next to the solenoid valve) on the master cylinder.
For systems with selector valves, identify the selector valve and associated low pressure
solenoid. Remove the locking pin from the manual override on the solenoid valve and turn the
thumbscrew to actuate (a flat screw driver can also be used) allowing the pressure to open the
required selector valve.
The selector valves should always be left in the closed position (standby), and only opened
during a system discharge. Following a system discharge, the selector valves must be closed
manually using the handle supplied.
Note: Where allowed by local Authority Having Jurisdiction. The feature for manual emergen-
cy release is not to be included in system installations in Germany due to regulations
by VdS.
1-9 FLOW CALCULATIONS
Flow calculations are to be based on the approved isometric drawings, and should be verified
prior to installation of the nozzles.
Any significant changes shall be evaluated and if necessary the flow calculation repeated and
orifices in nozzles replaced with ones suitable for the as-built system.
All calculations to determine the size of pipes and nozzle orifices must be carried out using the
software related to the Agent used.
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