Vista 20P alarm sirens normally sound for a continuous 4 minutes when tripped.
However, users can alter the length of the
alarm siren by following these simple steps: Access the programming mode by entering your 4-digit
installer code, followed by "800".
Click here if you don't remember your installer code. Press *33 (this is
the bell timeout field). Now you can
program your alarm sounding time. Below
is a list of selectable codes and their corresponding alarm times.
The safety testing and certification organization, Underwriters Laboratories, recommends
that a residential fire alarm should sound for 4 continuous minutes, and 16 minutes
for commercial burglaries.
Once you have chosen the appropriate alarm sounding time,
press *99 to exit the programming mode and save your information.
Test your changes by arming your system and purposely
setting off an alarm. Disarm your system
to stop the alarm from sounding.
