MAN1565-4
30
➢
Operation of the Service Switch.
➢
A Fault in the selected trigger circuit.
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Operation of the Lock-off valve.
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Operation of the Inhibit at an Local Control Station.
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A Fault in any of the activation zones.
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If any of the activation zones are isolated.
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 module has not
activated the selected activation circuit, then the following will occur:
➢
Stage 1 output is switched to +24VDC and stage 1 relay is output closed
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Stage 2 output is switched to +24VDC and stage 2 relay output is closed
➢
Light the agent release led on the ACC and LCS
’
s
➢
Activate gas-fired relay output
Monitoring of the Pressure Switch
Due to the requirements of 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 module 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
