Man-1134 Sigma XT+_ECP_02 Page 5 of 5
2.17 Manual only mode
The mode of the system can be toggled between Manual Only and Automatic & Manual by operating the Mode select key switch.
When the ECU is in Manual Only mode, the Extinguishant cannot be released via a serial connection to a Sigma CP fire control
panel or operation of the monitored activation inputs.
The mode can also be changed to manual by the external mode select input or a keyswitch on a status unit. Any mode select
input that is switched to Manual only mode will override a keyswitch switched to Automatic and Manual mode. All inputs must be
switched to Manual and Automatic mode for the ECU to be in Automatic and Manual mode.
2.18 Manual Release
The ECU may be activated by Manual release inputs via the manual release control on the front panel, a remotely mounted
Manual release control connected to the monitored manual release inputs or by a manual release control mounted on a status
unit.
Operation of any of these Manual release controls will immediately activate the ECU and begin the pre-release timer (if the
module is configured to have a time delay for Manual release inputs).
2.19 Abort input
The ECU has the facility for connection of an Abort control. Operation of the Abort input during the pre-release delay time or
before activation will light the Abort indicator on the ECU and the Extinguishant release timer will be cancelled i.e. the
Extinguishant will not be released. The ECU can be immediately reset from this condition.
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