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SPECIALISED OPTIONS
Certain additional features may be set up by the service provider at the commissioning stage.
They are as follow:
Non-latching Zone
This feature is available on zone 1 and is selectable at commissioning by use of a switch in the panel
(see Appendix C for selecting this feature). Note that this facility is additional to the requirements of
EN54.
When activated any fire condition on zone 1 will not be latched i.e. once the condition has cleared, by
whatever means, at the detecting device, the panel will automatically come out of the fire state for
zone 1 - no user intervention would be required at the panel.
Further details of this interface are available on request.
Coincidence Detection
This feature is available on zone 2 and is selectable at commissioning by use of a switch in the panel
(see Appendix C for selecting this feature).
On the first detector going into fire the panel indicates the event by sounding the buzzer and by hav-
ing a double flash followed by a pause on the zonal fire indicator. Once the second detector goes into
fire the full fire condition is initiated by the panel.
Using coincidence detection on zone 2 does not affect the way in which fires are recognised or acted
upon from other zones in the system.
Note also that a manual call point pressed on any zone will put the panel into the fire condition
immediately, irrespective of whether coincidence detection is active.
Alarm Line Delays
Delays can be introduced between the panel recognising a detector fire signal and the alarms being
sounded. That delay is selectable at commissioning by use of switches in the panel (see Appendix
C). The length of the delay can be set anywhere between 0 minutes i.e. no delay, and 7 minutes, in 1
minute intervals.
When the panel has alarm line delays set up the ALARM LINE DELAY indicator will be permanently
ON. When a fire is detected on a zone the ALARM LINE DELAY indicator will flash, the buzzer will
sound intermittently and the appropriate zonal fire indicator will flash. After the set delay period the
panel will switch the alarms ON, unless the panel is reset.
Note that, delays do not affect fire signals from manual call points. These signals are acted upon
immediately.
NOTE: AUX contacts are also delayed when this facility is active.
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