Owner’s Manual
Read and save these
instructions.
For help please visit
yourhome.honeywell.com
RTH8500
Touchscreen
Programmable
Thermostat
Installation is Easy
1. Label wires and remove your old thermostat
2. Install and wire your new thermostat
3. Set your new thermostat to match your heating/cooling system
• This thermostat works with virtually all System Types
• It is preset for the most common system
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 works on 24 volt or 750 mV systems.
It will NOT work on 120/240 Volt systems.
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