MAN1544-5
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6.12
Manual Mechanical Release of the Agent
With agent release systems, a manual mechanical means can be provided to release the agent.
If the pressure switch is activated (indicating that the agent has been released),and the agent release add-
on has not activated the selected activation circuit, then the following will occur:
➢
Stage 1 output is switched to +24VDC and stage 1 relay is closed
➢
Stage 2 output is switched to +24VDC and stage 2 relay output is closed
➢
Light the agent release LED on the ARC and LCSs
➢
The FACP activates its Bell, ASE, Warning System, Plant, and Alarm outputs
➢
Activate gas-fired relay output
6.13
Monitoring of the Pressure Switch
Due to the requirements of 5.9 Manual Mechanical Release of the Agent, the pressure switch input conveys
two pieces of information:
➢
When the pressure switch input is active, it signals that the agent has been released. The release
can be as a result of the agent release add-on or due to a manual mechanical release.
➢
When the pressure switch is not active, it signals that there is a full bottle of agent available to be
discharged.
In order for the agent release module to respond to a manual mechanical release, the pressure switch must
have been previously not active, to signify that a full bottle of agent is available
