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Siemens Application Guide «Fire Mode» CM1A5192en_01
Building Technologies Essential Service Mode (in-depth information) 23.10.2007
6.7.2 Starting the SED2 in ESM/Fire Mode
Enabling ESM will ALWAYS RUN the SED2, even if there is no RUN command ac-
tivated in the standard
1a
settings.
Once ESM/Fire Mode has been enabled, the display on the BOP will flash
ES
Example: within a building the Air Handling Units may be stopped at night-time or
weekend. If a fire is detected, the standard control from the Building Management
System is overridden by the Fire Control Panel (FCP) if required. However, the ac-
tivation of ESM/Fire Mode within the SED2 from the FCP will ensure the smoke
exhaust fans operate.
6.7.3 Stopping the SED2 in ESM/Fire Mode
The only method of stopping the SED2 once ESM has been activated is by open-
ing the ESM circuit (deactivate the DIN assigned as ESM) or remove power to the
SED2.
The (red) stop button on the BOP, any other DIN assigned in for OFF1, OFF2 or
OFF3 or command designated by P0700 (e.g. 1,2,4,5 or 6) will have no effect.
from AS/NZS 1668.1: 1998 “It cannot be inadvertently deactivated, programmed or
otherwise left in a non-functional condition by operating or maintenance personnel,
thus rendering it incapable of operating correctly in fire mode.”
Site personnel need to be aware that once the SED2 has been activated in
ESM/Fire Mode it will NOT STOP until the DIN assigned to ESM is opened. This
should be documented and or signs placed where they are visible.
Example
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