Fire-Lite MS-9050UDC Addressable Fire Alarm Control Panel - Manual (Page 132)

132 MS-9050 Series Manual — P/N 52413:G 4/14/2014
Operating Instructions NAC Operation
• Relays programmed for medical alert will be activated
• The alarm relay is not activated
• Fire Alarm NACs will not activate
• SLC NACs (control modules) will activate
• Timers are not started
• Store event in history buffer
• Activate appropriate LED on the ANN-LED annunciator (required for this application)
• Each ANN-LED can support up to 10 zones.
Medical alert conditions latch. They can be assigned to software zones.
4.10 NAC Operation
There are two programmable NACs (Notification Appliance Circuits) resident on the MS-9050UD
main circuit board which can be wired for Style Y (Class B) or Style Z (Class A) . Both NACs may
be programmed as silenceable or nonsilenceable and may also be programmed for steady or coded
operation. Coded operation provides a choice between March Time, Temporal or California cod-
ing.
4.11 Programmed Zone Operation
Each addressable detector and monitor module can be assigned to a maximum of five software
alarm zones. A general alarm zone Z00 may be listed for output (control) points, but it is not nec-
essary to list Z00 for input points, since this is the default zone for all alarm input devices. Zone
Z00 is not activated by supervisory points.
When an input device alarms and is not disabled, it activates all software zones assigned to it. An
output device that is not disabled is turned on when any of the software zones to which it is pro-
grammed become active. Only fire alarms can turn on any of the two main NACs.
Note that hazards/tornado alerts do not turn on the two main NACs.
4.12 Disable/Enable Operation
Input points which are disabled do not cause an alarm or any zone activation. Disabled output
points are held in the off state. All disabled points are treated as if they were in trouble, with the
exception being the status label that will be displayed is DISABL.
4.13 Waterflow Circuits Operation
If an alarm exists from a monitor module point that has a waterflow type code and its mapped NAC
control module outputs are programmed for nonsilenceable operation, the Alarm Silence key will
not function. Also, any output zone activated by a waterflow device will not be silenceable if the
Waterflow Silenceable option is set to NO in system programming.
4.14 Detector Functions
Maintenance Alert
Each addressable detector is monitored by the control panel for its maintenance status. If a detector
is near but below the allowed alarm limit, a ‘maintenance alert’ message will automatically be dis-
played, signaling that the detector is in need of servicing.