Honeywell RTH221 Guía De Instalación
69-2448EF—03
ii
Quick Installation Guide
Identify System Type
This thermostat is compatible with the following systems:
Gas, oil or electric furnace
•
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.
We are here to help.
Call 1-800-468-1502.
This thermostat cannot be used on heat pumps with
auxiliary/backup heat or on multistage systems.