Note: Press SET button anytime during alarm programming mode to return to the default clock display.

Programming Time Alarms

With the Clock and Alarm icon flashing, press the ALARM/CHART button to select the desired alarm.

Press and hold ALARM/CHART button until the hour digit will flash

Set the alarm hour using UP or DOWN arrow button. Press and hold either button for quick digit advance.

Press ALARM/CHART to confirm selection.

Set the alarm minutes using UP or DOWN arrow button. Press and hold either button for quick digit advance.

Press ALARM/CHART button to confirm selection.

Set a Snooze interval (both alarms share same snooze time duration) using UP or DOWN arrow button. Press and hold either button for quick digit advance.

Press ALARM/CHART button to confirm your selection.

After programming is completed, the display will return to the alarm selection screen.

Disable/Enable Snooze function

To enable a snooze function press LIGHT/SNOOZE button.

Note: Alarm will automatically “snooze” if no buttons are pressed after the alarm sounds for 2 minutes. This will occur three times only.

Disable alarm(s):

Press ALARM/CHART button to disable the alarm (s).

Note: For weekday alarm, pressing ALARM/CHART button will only disable the alarm for the current day. The alarm will activate again on the next day, Monday through Friday.

Atomic Time Reception

The purpose of the atomic clock is to provide consistently accurate time and date automatically. The radio controlled clock searches for, and periodically synchronizes to, the NIST (National Institute of Standards and Technology) Atomic clock signal transmitted from Colorado, throughout the entire continental United States.

During night-time hours, atmospheric conditions improve radio signal reception. A single daily reception is sufficient enough to keep the clock accuracy within milliseconds.

Unit should be positioned 8 feet (2 meters) from interference sources such as a TV, computer, microwave, etc.

The signal reception is weakened within concrete walls found in basements or office buildings. Place the unit near the window for best reception.

It takes between 24 and 72 hours for the clock to receive an atomic time signal reception

Once the atomic time signal is received, the date and time will be set automatically, and the icon will appear. Your atomic

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Honeywell TE821W user manual Programming Time Alarms, Disable/Enable Snooze function, Disable alarms, Atomic Time Reception