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Honeywell RTH221 Series User Manual

Honeywell RTH221 Series
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69-2606ES—01 2
Is there a sealed tube containing
mercury? If so, see back cover
for proper disposal instructions.
M28099
Old thermostat
Cover
Remove old thermostat but leave wallplate with
wires attached.
Remove Old Thermostat
Do not remove
wallplate yet
2

Table of Contents

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Honeywell RTH221 Series Specifications

General IconGeneral
Stages1 Heat/1 Cool
Voltage24V
Temperature Range40°F to 90°F (4°C to 32°C)
BacklightNo
DisplayDigital
Power SourceBattery
Temperature ControlManual
CompatibilityGas, Oil, Electric
TypeNon-Programmable Thermostat
Program PeriodsNot Applicable

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