FenwalNET 8000-ML For City Of Chicago Applications
P/N 06-237041-001 G-3 February 2011
G-2.2 City Tie Trouble
The FenwalNET 8000-ML supports an external CITY TIE TROUBLE indicator and controller for City
of Chicago applications. The external indicator is a 24 Vdc bell. If the wire connection to the Master
Box becomes disconnected (either by turning the City Disconnect Key Switch or by some other
means), the Stand-Alone Control Box activates the separately-installed bell, annunciating a Trouble
State. The bell may be silenced by moving the box’s toggle switch to “Bell Silence”. When the switch
is in the “Bell Silence” position, the Bell Silenced indicator will light. When the City Tie Trouble
clears, if silenced, the bell will resound to warn the operator that the toggle switch is in the “Bell
Silence” position. To return the Stand-Alone Control Box to its normal mode, move the toggle switch
to “Bell Normal”.
A pushbutton switch is also located on the front of the box (labeled “Bell Test”) to permit testing of
the bell as desired.
Note: If a hardware problem occurs with the City Tie Expansion Card, the FenwalNET 8000-ML
panel will go into a Trouble state and the FIRE ALARM TROUBLE indicator will activate.
G-2.3 City Disconnect Switch
The ability to externally disconnect the City Tie circuit is provided through a door-mounted key
switch. The key switch is located in the middle of the front panel and has two states: Normal and
Disconnected. Turning the key switch to the “Disconnected” position causes the white pilot light to
light. After the key is positioned as desired, it should be removed and stored with designated
personnel.
G-3 INSTALLATION AND CONNECTIONS
All field wiring connections are made via terminal blocks with screw-type terminations which can
adequately hold #12 AWG solid conductors. Each terminal is clearly numbered for visible
identification. A conduit knockout is provided at the top of the unit. Wire sizes of #12 AWG, #14
AWG, #16 AWG and #18 AWG are acceptable for use.
To access internal connections, turn the rightmost key switch and unlock/open the door.
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