Honeywell RTH6500WF User Manual page 26

Installing your thermostat
12 Determine your heating/cooling system type.
Important! Heating/cooling system type must be set so that your
thermostat operates properly and does not damage your system.
12a If your system type is conventional single stage (natural gas-powered single
stage with a/c), continue to "Connecting to your Wi-Fi network" on page 26.
12b If your system is:
• Conventional multistage heat and cool
• Any type of heat pump
• Hydronic
• Other
You MUST change the system type by setting system function 1. See page 48 to
match your thermostat to your system type.
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If you are not sure of your
heating/cooling system type
or have other questions, go
to wifithermostat.com/support