Chapter 3: System operation
P/N 3102351-EN • REV 005 • ISS 28DEC18 151
Unlatching latched output devices
Latched outputs are devices that are configured to shut down air handlers and dampers
automatically when an alarm activates, and to keep them shut down until they are manually
unlatched and restored. For this reason, devices configured as latched output devices must be
manually unlatched and then restored.
When outputs have been latched, the panel generates an “Outputs are latched” event. The
unlatch command affects all latched output devices system-wide. You can assign the Unlatch
Outputs command to a programmable key on the front panel or to a Class A or B Signature
input module circuit with one of the devices listed on page 96.
To unlatch latched output devices:
1. Press the Unlatch Outputs button on the control panel (if programmed).
— or —
Press the Unlatch Outputs module button (if programmed).
Activating and restoring panel NACs
Activating a notification appliance circuit (NAC) turns on its outputs. Restoring the NAC turns
them off again. This is typically done for testing purposes.
Note: Disabled NACs must be manually enabled and then restored. See “Activating and
restoring sensor bypass” on page 153.
To activate a panel NAC:
1. Press the Menu button and choose Control.
2. Enter a level one password.
3. Choose Activate/Restore.
4. Choose Panel NAC.
5. Select the NAC that you want to activate.
6. Press Enter.
7. Press Cancel to return to the previous menu.
— or —
Press the Menu button to exit menu mode.
Notes
• Disabled devices must be manually enabled and then restored. See “Activating and
restoring sensor bypass” on page 153.
• Latched output devices must be manually unlatched and then restored. See “Unlatching
latched output device” above.
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