Honeywell RTH8500 - Page 21

RTH8500
19
About your new thermostatSystem setup
Heating fan control
Function
0180
Press s/t to select your heating system & fan control:
Options: 0 Gas or oil heat: Use this setting if you have a gas or oil heating system
(system controls fan operation).
1 Electric heat: Use this setting if you have an electric heating system
(thermostat controls fan operation).
Heat pump changeover valve (for heat pumps only)
Function
0190
Press s/t to select whether your changeover valve is used in heating or cooling:
Options: 0 Cooling changeover valve: Use this setting if you connected a wire labeled
“O” to the O/B terminal (see page 11).
1 Heating changeover valve: Use this setting if you connected a wire labeled
“B” to the O/B terminal (see page 11).