Honeywell PRO TH4110B Installation Manual page 8

Installation Guide
Gas or Oil: For gas or oil heating
systems, leave the fan operation
switch in this factory-set position
(This setting is liar systems that
control the fan in a call liar heat.)
Electric or Heat Pump: Change the
switch to this setting lk)r heat
pump or electric heat systems.
(This setting is lk_rsystems that
allow the thermostat to control the
fan in a call for heat, if a fan wire is
connected to the G terminal.)
Set fan operation switch