Honeywell RTH221B1039/U1 1-Week Programmable Thermostat - Use Manual

Honeywell RTH221B1039/U1 1-Week Programmable Thermostat - Use Manual - Use Guide PDF download or read online.
Programmable Thermostat
Owner’s manual
Read and save these instructions. For help please visit
Heat Off Heat Off Cool Cool Auto Auto Fan
Identify System Type This thermostat is compatible with the following systems:
• Gas, oil or electric furnace

Newest Added: PT-P750W AI-IN EH-NA65-K NQ1300PRW MFC-J5520DW
• Central air conditioner
• Hot water system with or without pump
• Millivolt system
• Central heating and cooling system
• Heat pump without auxiliary/backup heat
Do you need assistance? We are here to help.
Call 1-800-468-1502 for wiring assistance before returning the thermostat to the store.
This thermostat cannot be used on heat pumps with backup heat or on multistage systems.
RTH2300/RTH221 Series
ATTENTION: MERCURY RECYCLING NOTICE This product does not contain mercury. However, this product may replace a product that contains Hg mercury. Mercury and products containing mercury should not be discarded in household trash. For more information on how and where to properly recycle a thermostat containing mercury in the United States, please refer to the NO MERCURY NE PAS JETER
LE MERCURE
NOTICE: To avoid possible compressor damage, do not run air conditioner if the outside temperature drops below 50°F (10°C).
Customer assistance
RTHXXXX code.
Table of contents
Installation
Installation ...
Advanced Installation ...
About your new thermostat
Controls and Home screen quick reference ...
Preset energy-saving schedules ...
1 Turn Off Power to Heating/Cooling System
Circuit breaker
M31535 box
Heating/cooling system power switch
Programming and operation
Setting the clock ...
Adjusting program schedules ...
Overriding schedules temporarily ...
Overriding schedules permanently ...
Compressor protection...
Change filter ...
Replace batteries ...
Appendices
Troubleshooting ...
Limited warranty ...
2 Remove Old Thermostat Remove old thermostat but leave wallplate with wires attached.
Do not remove wallplate yet
3 Label Wires with Tags Label the wires using the supplied wire labels as yo

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Use Guide Honeywell RTH221B1039/U1 1-Week Programmable Thermostat - Use Manual PDF.

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