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LST700 SERIES INSTALLATION & MAINTENANCE MANUAL • Approved Document No. DFU7002012 Rev 4
LST700 SERIES FIRE ALARM PANEL
An overview of the panel’s controls
Three control levels are available on the panel - general user (access level one), authorised user
(access level two) and engineer (access level three), as detailed below:
General user controls (access level one)
When the panel is in its normal state, the indicator lights on the front of the enclosure give a
comprehensive overview of the system’s current status. Any fire and fault conditions are clearly
displayed, disablements highlighted and the status of all outputs reported. The only functions that
can be performed when the panel is in this state are:-
■
Muting the panel’s internal sounder.
■
Overriding any delays which may have been programmed into the panel.
■
Putting the panel into Access Level Two to make active the authorised user controls (see below).
Authorised user controls (access level two)
To avoid unauthorised changes to critical parts of the fire alarm system, certain fire alarm panel
controls are only available to authorised users. These include:-
■
Silencing the sounders.
■
Resetting an alarm condition.
■
Manually activating the alarm sounders (to evacuate a building)
■
Testing the indicator lights.
■
Disabling or enabling any (or all) of the following:
zones, sounders, the fault output, the remote output, the auxiliary fire output and delays.
The authorised user controls can be accessed by inserting the 003 key into the keyswitch on the front
of the Panel and turning it to the vertical “access” position.
For detailed information on how to use the general and authorised user controls, please refer
to the User Manual / Log Book.
Engineer controls (access level three)
The following controls are available to competent service personnel only:-
■
The programming of coincidence (double knock).
■
The setting-up zones for non-latching operation.
■
The programming of delays.
■
The invoking of test procedures.
■
Fault diagnosis.
A brief overview of these functions appears below. Details of how to gain access to the engineer
controls and how to use them appears on pages 16 and 17. We recommend, however, that you
carefully read the sections below before attempting to implement any changes to the factory
defaults or existing system set-up.
Engineer functions
Coincidence
The programming of coincidence (also referred to as ‘double knock’) is a feature often used on
sites where the consequence of a false alarm is onerous, e.g. where the panel is used to trigger a
sprinkler or gas extinguishant system.
Coincidence is programmed into the panel in pairs of zones, the pairs being zones 1 and 2; zones 3
and 4 (if fitted), zones 5 and 6 (if fitted); and zones 7 and 8 (if fitted)
When any of these pairs are programmed to operate in coincidence mode, there must be alarms
on both zones before the sounders and outputs are turned on. If only one of the pair goes into
alarm, the panel will indicate the alarm condition by illuminating the relevant indicator on the front
of its enclosure and sounding its internal sounder, thus prompting the user to investigate.
If found to be false, the alarm can be reset by the user. If found to be a true fire condition,
the user can manually activate the alarm sounders and outputs by entering access level two and
pressing the SILENCE / RESOUND SOUNDERS button.
PROGRAMMING THE PANEL
