Fan Operation Settings; Thermostat Mounting - Honeywell PRO TH3110D Installation Manual

Fan operation settings

TH3110D only:
• Gas or Oil: For gas or oil heating
systems, leave the fan operation switch
in this factory-set position. (This setting is
for systems that control the fan in a call
for heat.)
• Electric or Heat Pump: Change the switch
to this setting for heat pump or electric
heat systems. (This setting is for systems
that allow the thermostat to control the fan
in a call for heat, if a fan wire is connected
to the G terminal.)

Thermostat mounting

Align the 4 tabs on the wallplate with
corresponding slots on the back of
the thermostat, then push gently
until the thermostat snaps in place.
Push excess wire back into
the wall opening.
Plug wall opening with
non-flammable insulation.
Set fan operation switch.
5
PRO TH3000 series
MCR29400
MCR29401
69-1929EFS—01