Honeywell RTH221B1021 User Manual

3
Installation
Installation ............................................3
Advanced Installation ...........................9
About your new thermostat
Controls and Home screen
quick reference ...................................11
Preset energy-saving schedules ........12
Programming and operation
Setting the clock ................................. 12
Adjusting program schedules ............. 13
Overriding schedules temporarily ......14
Overriding schedules permanently ....14
Compressor protection .......................15
Early Start ..........................................15
Replace batteries ...............................16
Appendices
Troubleshooting .................................. 17
Limited warranty ................................. 18
Table of contents
1 Turn Off Power to Heating/Cooling System
or
M31535
Circuit breaker
box
Heating/cooling system
power switch

Honeywell RTH221B1021 Specifications

General

Type	Non-programmable
Display	Digital
Power Source	Battery
Temperature Control Range	40°F to 90°F (4°C to 32°C)
Stages	1 Heat/1 Cool
Voltage	24V
Backlight	No
Compatibility	Single-stage heating and cooling systems