Honeywell RTH7400 Series Quick Installation Manual page 19

System setup About your new thermostat
See page 14 to navigate between functions.
Function
0180 Heating Fan
Control
0190 Heat Pump
Changeover
Valve (for heat
pumps only)
NOTE: Some functions in the following pages
may not appear due to previous selections
made.
RTH7400/RTH7500 Series
Settings & Options
Press to select your heating
s/t
system & fan control:
Gas or oil heat: Use this
0
setting if you have a gas or
oil heating system (system
controls fan operation).
Electric heat: Use this setting
1
if you have an electric heating
system (thermostat controls fan
operation).
Press NEXT
Press to select whether your
s/t
changeover valve is used in heating
or cooling:
Cooling changeover valve:
0
Use this setting if you con-
nected a wire labeled "O" to
the O/B terminal (see page 22).
Heating changeover valve:
1
Use this setting if you con-
nected a wire labeled "B" to the
O/B terminal (see page 23).
Press NEXT
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