First Alert 4800 - Manual (Page 77)

Web Browser Operation
Model 4800 User's Manual
A LARM
Click the ALARM tab to open the Alarm menu to adjust input/output settings for each
channel.
Alarm Input: Dropdown menu (options: Alarm Input 1 to 4).
Alarm Type: Dropdown menu (options: Open and Close, referring to N.O./N.C.).
Enable: Check the box to enable the Alarm Schedule. Click ALARM SCHEDULE
to display a schedule window.