RTH7400/RTH7500
System 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).