Programming & Operation Setting The Clock - Honeywell RTH221 Operating Manual

Operating Manual
Set the clock
1 Press the Set button. Set Time will appear on the screen and the
time display will flash.
2 Press the Up or Down button to set the time.
3 Press the Run button to save the changes & exit. (The changes
are also saved if you do not press any button for 60 seconds.)
NOTE: The clock has lost its settings when the time display flashes. If the thermostat is
following the schedule, it will use the temperature settings programmed for the Wake
period until you readjust the clock.
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