In full disclosure, I'm trying to document all the possible reasons this is noncompliant for a custom, as it was approved without the AHJ getting all the info.
DPDT vane type waterflow switch, upon activation:
one side triggers an alarm on a conventional zone on the 'master FACP'
Other side is a switch leg of 24VDC nonresettable power from the 'master FACP.'. When the switch changes state it triggers a DPDT relay. This relay is adjcent to the waterflow switch. The two Sets of contacts independently trigger 'slave FACP 1' and 'slave FACP 2' into general alarm through a zone on those slave panels.
The 24 vdc nonresettable power from the master FACP is supervised by a end of line power supervision relay in the cabinet next to the waterflow switch. The switch leg from the cabinet to the waterflow switch is obviously beyond that power supervision relay.
The master panel notifies the responding authorities only. The two slave panels notify occupants only through their NACs.
The master panel is not located near either slave panel. Neither slave panel is co-located.
The master panel also supervises the two slave panels for alarm and trouble.
The slave panels do not have any input from the master panel or each other. Although there is a 1 hour partition between the two independent areas served by the two slave panels, no non-waterflow alarm will activate both.panels.
The slave panels do not cross supervise the master panel.
Assume all components are listed for their use (or so I'm told) and when conduit is required, it's in use.
Putting aside the theory of operation, good design, AHJ considerations, having to reset 3 panels etc. what's wrong here?
2010 NFPA 72, 2008 NFPA 70 are enforced.
Lack of supervision of the 24VDC switch leg?
Can you use aux power for initiating?
The panels are not in the same room, connected by conduit, would you not have to cross supervise?
Any input?
DPDT vane type waterflow switch, upon activation:
one side triggers an alarm on a conventional zone on the 'master FACP'
Other side is a switch leg of 24VDC nonresettable power from the 'master FACP.'. When the switch changes state it triggers a DPDT relay. This relay is adjcent to the waterflow switch. The two Sets of contacts independently trigger 'slave FACP 1' and 'slave FACP 2' into general alarm through a zone on those slave panels.
The 24 vdc nonresettable power from the master FACP is supervised by a end of line power supervision relay in the cabinet next to the waterflow switch. The switch leg from the cabinet to the waterflow switch is obviously beyond that power supervision relay.
The master panel notifies the responding authorities only. The two slave panels notify occupants only through their NACs.
The master panel is not located near either slave panel. Neither slave panel is co-located.
The master panel also supervises the two slave panels for alarm and trouble.
The slave panels do not have any input from the master panel or each other. Although there is a 1 hour partition between the two independent areas served by the two slave panels, no non-waterflow alarm will activate both.panels.
The slave panels do not cross supervise the master panel.
Assume all components are listed for their use (or so I'm told) and when conduit is required, it's in use.
Putting aside the theory of operation, good design, AHJ considerations, having to reset 3 panels etc. what's wrong here?
2010 NFPA 72, 2008 NFPA 70 are enforced.
Lack of supervision of the 24VDC switch leg?
Can you use aux power for initiating?
The panels are not in the same room, connected by conduit, would you not have to cross supervise?
Any input?
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