XLS-REL Technical Reference Manual 3.5
Operational description
Releasing fire suppression agents
Understanding the automatic release sequence
The automatic release sequence requires an AND group (cross
zone) or a matrix group (counting zone). AND groups and matrix
groups require fire alarm signals from designated Signature
Series devices. These logic groups are programmable through a
laptop computer and the System Definition Utility (SDU).
Figure 3-4 explains the automatic release sequence.
Note: XLS100 systems do not support matrix groups. See
Programming the XLS-REL for AND group rules. To create AND
groups and matrix groups, see the System Programming Manual
and the SDU Online Help for your system.
Figure 3-4: Automatic release sequence
Note: Prerelease circuit 1 supports audible notification
appliances that sound prerelease and release signals. Audible
prerelease signals sound at 15 and 60 pulses per minute. The
audible release signal is a steady tone. Prerelease circuit 2
supports visual notification appliances.
RELEASE013.CDR
Release circuits
First alarm relay
Automatic delay timer
Prerelease circuits
Selectable
automatic delay time
(10 to 50 seconds)
[1] [4] [5]
[1] A detector signals the first alarm. This event
simultaneously activates the:
• First alarm relay
• Prerelease strobe circuit (steady On)
• Prerelease horn circuit (15 pulses per minute)
[3] 10 seconds before the automatic delay timer expires, the prerelease
(horn) circuit changes to steady On.
[2] A detector in the protected area signals a second alarm and
meets the AND group conditions.* The automatic delay timer
then starts its countdown and the prerelease horn circuit
changes to 60 pulses per minute.
*AND group and matrix group conditions depend on programming.
[2]
[5] A manual reset at the fire alarm control panel deactivates the release
solenoids and the Releasing Module returns to the normal state.
[4] The automatic delay timer expires and the release circuits activate.
Time line (See details below.)
[3]
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