Power Options

Insert R and C wires into designated terminals for primary AC power. (C terminal is optional if batteries are installed but is recommended). Remove wires by pressing down on the terminal tabs.

Thermostats using Y and G wires:

If there is no C wire from the previous thermostat or no extra wire in the bundle to the thermostat, you may use the THP9045A C-wire adapter (sold separately).

Note: For more information on the THP9045A C-wire adapter, go to: C-WIRE Adapter Installation Guide

Insert AA batteries for primary or backup power.

Setting Slider Tabs

Set R Slider Tab

Use built-in jumper (R Slider Tab) to differentiate between one or two transformer systems.

  • If there is only one R wire, and it is connected to the R, Rc, or RH terminal, set the slider to the up position (1 wire).

  • If there is one wire connected to the R terminal and one wire connected to the Rc terminal, set the slider to the down position (2 wires).

Note: Slider Tabs for U terminals should be left in place for FocusPRO N100 models.

UWP Wall Plate

R/Rc slider tab

Wiring terminal designations

S

C7089U1006 wired outdoor sensor

(TH1320U4002 only)

S

Y

Compressor contactor (stage 1)

Y2

Compressor contactor (stage 2)
(TH1320U4002 only)

G

Fan

C

24VAC common. For 2-transformer systems, use Common wire from cooling transformer.

U

Not used on these models.

U

L/A-A

Heat Pump fault input.

O/B

Changeover valve

AUX-W2

Auxiliary heat
Heat (stage 2) (TH1320U4002 only)

E

Emergency Heat
(TH1320U4002 only)

W

Heat (stage 1)

K

To THP9045A C-Wire adapter if needed

R

24VAC power from heating transformer*

Rc

24VAC power from cooling transformer*

* Terminal can be jumped using R Slider Tab. See Setting Slider Tabs above.

The most commonly-used terminals are shaded in the illustration above.

Video: Add a C-Wire Adapter

Note: The C-wire is optional for the N100 when using AA batteries.

Watch this video for step-by-step instructions on adding a C-Wire adapter to the FocusPRO® N100 Series Thermostat.