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Honeywell RTH221 - Quick reference to controls; Thermostat Control Buttons

Honeywell RTH221
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Operating Manual
4
Quick reference to controls
System switch (see page 7)
Cool: System is in Cooling mode.
Off: System is off.
Heat: System is in Heating mode.
Fan switch (see page 8)
On: Fan runs continuously.
Auto: Fan runs only when
heating or cooling is activated.
Up/Down buttons
Press to adjust temperature.
Press to set clock, day or
schedule (see pages 6 & 11).
Press to override schedule and
hold temperature (see page 13).
Press to run (follow) schedule
(see page 9).

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