Protec 3100 - System Delays; Coincidence Zones

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93-305-05 Issue 0 © Copyright Protec Fire Detection PLC 2004
8.0 System Delays
Delays may have been programmed in the 3100 to allow a predetermined time from a zone
activation until:
• The alarm outputs and global fire contacts activate.
• The fire link activates.
This can be useful to allow time for the cause of the activation to be investigated by a
responsible person. If the cause of the activation is found to be legitimate the alarm outputs
can be manually activated. If the cause of the activation is found to be a false alarm the 3100
can be reset.
A delay time can be programmed into one, or more zones. The delay time set up on the 3100
applies to all zones and can be set to a maximum 10 minutes.
The fire link delay time is independent of the zone delay time and can be set up to a
maximum of 10 minutes locally on the fire link interface.
The presence of a programmed delay is indicated by the ‘Output Delay’ indicator being
illuminated.
The 3100 system set-up chart must be consulted to determine exactly which zones have
been delayed and what the delay time is set to.
Note:
Zone delays only pertain to automatic zone activations. A manual activation on a zone will
always override a programmed zone delay.
9.0 Coincidence Zones
At the time of commissioning, one or more zones may have been programmed as
‘coincidence’ zones. This means that two, or more, of the coincidence zones must activate
together before the 3100 will sound the alarms or activate the Global Fire Contacts.
If one coincidence zone is triggered the cause of the activation must be investigated, if no
action is taken within 2 minutes the 3100 will sound the alarms and activate the Global Fire
contacts.
If the cause of the alarm is deemed to be false the 3100 should be reset.
The only way to determine if coincidence zones have been programmed into the system is by
consulting the system set-up chart (appendix 1 of this document).
Note:
• A single activated coincidence zone will time out and sound the alarms after 2 minutes.
• A zone programmed as coincidence will be overridden by a manual call point activation
on that zone.