Battery Installation; Reversing Valve Setting; Thermostat Mounting; Fan Operation Setting - Honeywell PRO TH1000 / TH2000 Series Installation Manual

Installation Guide

Reversing valve setting

NOTE: This setting is necessary only if the thermostat is connected to a heat pump.
The jumper is located on the back of the thermostat faceplate. Set it according to the type
of reversing (changeover) valve used by the heat pump.
• O (factory setting): The reversing valve is energized when the System switch is set to
Cool (cooling mode).
• B: The reversing valve is energized when the System switch is set to Heat (heating
mode).
Incorrect jumper setting: The heat pump operation will be reversed; i.e., it will cool in
Heat mode and will heat in Cool mode.

Fan operation setting

NOTE: This setting is not applicable if a fan is not connected to the G terminal.
The jumper is located on the back of the thermostat faceplate. It determines how the fan
operates when placed in Automatic mode.
• HG (factory setting): Leave the jumper in this position for gas or oil heating systems. In
this position, the heating system controls the fan operation and activates the fan only
when the plenum air is sufficiently warm.
• HE: Place the jumper to this position for heat pump or electric heating systems. In this
position, the thermostat activates the fan only when there is a call for heat.
Incorrect jumper setting: An incorrect setting is noticeable in a gas or oil heating system.
When heating starts, you will initially feel cold air coming out of the vents as the fan is running
before the furnace has enough time to heat up the air.

Battery installation

If 24 VAC common wire is connected to the C terminal, batteries are
optional and serve to provide backup power.
If 24 VAC common wire is not connected to the C terminal, batteries
are necessary to power the thermostat.
Install 2 AAA batteries on the back of the thermostat faceplate as
shown.

Thermostat mounting

Align the two brackets on the top of the thermostat with the
corresponding slots on the top of the wallplate.
Push the faceplate against the wallplate.
Tighten the screw at the bottom of the thermostat.
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