Honeywell THX321WFS2001W/U T10 PRO Smart Thermostat

1. Open package to find the UWP. See Figure 1.

2. Position the UWP on the wall. Level and mark hole positions. See Figure 2.

Drill holes at marked positions, and then lightly tap supplied wall anchors into wall using a hammer.

• If your box contains red anchors, drill holes.
• If your box contains yellow anchors, drill 3/16” holes.

3. Pull the door open and insert wires through wiring hole of the UWP. See Figure 3.

4. Place the UWP over the wall anchors. Insert and tighten mounting screws supplied with the UWP. Do not overtighten. Tighten until the UWP no longer moves. Close the door. See Figure 4.

Use the Optional Cover Plate when:

• Mounting the thermostat to an electrical junction box
• Or when you need to cover paint gap from the old thermostat.

5. Separate the Junction Box Adapter from the Cover Plate. See Figure 5.

6. Mount the Junction Box Adapter to the wall or an electrical box using any of the eight screw holes. Insert and tighten mounting screws supplied with Cover Plate Kit. Do not overtighten. Make sure the Adapter Plate is level. See Figure 6.

7. Attach the UWP by hanging it on the top hook of the Junction Box Adapter and then snapping the bottom of the UWP in place. See Figure 7.

8. Snap the Cover Plate onto the Junction Box Adapter. See Figure 8.

• 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 on the old thermostat, 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).

• Use built-in jumper (U Slider Tab) for IAQ device.
• When the U Slider Tab is in the down position (2 wires) the U contacts are a dry set of contacts.
• If your IAQ device is powered by the cooling transformer, move the U Slider Tab to the up position (1 wire). When this is done, the lower U terminal is internally jumped to the Rc terminal. In this application, you would hook up one wire from your IAQ device to the upper U terminal and the other to the common side of the cooling transformer. The 1 wire setting is most commonly used when using a fresh air damper for ventilation or using low speed fan for dehumidification.
• See wiring examples on the next page.

1H/1C System (1 transformer)

R Power

Rc [R+Rc joined by Slider Tab]

Y Compressor contactor

C* 24VAC common

W Heat relay

G Fan relay

Hot Water Relay Panel

R Power

Rc [R+Rc joined by Slider Tab]

W Heat Relay

C* 24VAC common

1H/1C System (2 transformers)

R Power (heating transformer)

Rc Power (cooling transformer)

Y Compressor contactor

C* 24 VAC common from cooling transformer

W Heat relay

G Fan relay

Heat-only System with Fan

R Power

Rc [R+Rc joined by Slider Tab]

C* 24VAC common

W Heat relay

G Fan relay

2H/2C System (1 transformer)

R Power

Rc [R+Rc joined by Slider Tab]

Y Compressor contactor (stage 1)

C* 24VAC common

W Heat relay (stage 1)

G Fan relay

W2 Heat relay (stage 2)

Y2 Compressor contactor (stage 2)

Cool-only System with Fan

R Power

Rc [R+Rc joined by Slider Tab]

Y Compressor contactor

C* 24VAC common

G Fan relay

1H/1C Heat Pump System

R Power

Rc [R+Rc joined by Slider Tab]

Y Compressor contactor

C* 24VAC common

O/B Changeover valve

G Fan relay

2H/2C Heat Pump System

R Power

Rc [R+Rc joined by Slider Tab]

Y Compressor contactor (stage 1)

C* 24VAC common

O/B Changeover valve

G Fan relay

Y2 Compressor contactor (stage 2)

L Heat pump fault input

2H/1C Heat Pump System

R Power

Rc [R+Rc joined by Slider Tab]

Y Compressor contactor

C* 24VAC common

O/B Changeover valve

G Fan relay

Aux Auxiliary heat**

E Emergency heat relay**

L Heat pump fault input

3H/2C Heat Pump System

R Power

Rc [R+Rc joined by Slider Tab]

Y Compressor contactor (stage 1)

C* 24VAC common

O/B Changeover valve

G Fan relay

Aux Auxiliary heat**

E Emergency heat relay**

Y2 Compressor contactor (stage 2)

L Heat pump fault input

1. Push excess wire back into the wall opening.
2. Close the UWP door. It should remain closed without bulging.
3. Align the UWP with the thermostat, and push gently until the thermostat snaps in place.

Note: If you used the Optional Cover Plate shown on page 2, remove the gray trim ring from the thermostat before step 3. Then align the thermostat with cover plate and push gently until the thermostat snaps into place.

Note: If needed, gently pull to remove the thermostat from the UWP

The display will walk you through equipment setup, connecting to wireless sensors and connecting to Wi-Fi.

The final step in the setup is a place you can enter your company name and contact information as well as your Contractor PRO™ number.

That contact information will be displayed with alert or reminder messages to keep you connected to your customer

Remove white cover from grey base and Insert (2) AAA Alkaline batteries in the sensor.

Open the menu.

Tap "Devices & Sensors."

Tap "Add."

Follow the on-screen instructions.

Snap the sensor onto the wall-plate.

Adhere the included command strip to the wall-plate. Then adhere the sensor to the wall. Level sensor for appearance. (See the sensor instructions for proper placement.)

1. The red dot above the Menu icon indicates an active alert or notification. Touch the Menu icon to view active Alerts & Notifications.
2. Touch Notifications to open this menu.
3. Touch the alert message to see more information about the alert.

• Check circuit breaker and reset if necessary.
• Make sure power switch at heating and cooling system is on.
• Make sure furnace door is closed securely.

• Check setting in MENU/ Preferences / Inactive backlight brightness or Inactive sleep backlight brightness

• Touch MENU to go to system mode. Set to heat. Make sure the heat setpoint is above the room temperature.
• Touch MENU to go to system mode. Set to cool. Make sure the cool setpoint is below the room temperature.
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is on.
• Make sure furnace door is closed securely.

Make sure heating and cooling temperatures are set to acceptable ranges:

• Heat: 40 °F to 90 °F (4.5 °C to 32.0 °C)
• Cool: 50 °F to 99 °F (10.0 °C to 37.0 °C)

• Compressor protection feature is engaged. Wait 5 minutes for the system to restart safely, without damage to the compressor.

• For heat pump systems, verify there is not a wire attached to W on UWP systems. See “Heat pumps systems" on page 7.

• For heat pump systems, verify there is not a wire attached to W on UWP systems. See “Heat pumps systems" on page 7.

• Verify there is not a wire attached to W for heat pump systems. See "Wiring" on pages 6-7.

• Press and hold Connect on the wireless sensor for seconds. The LED will turn Amber. Return to the thermostat menu and press Menu > Devices andSensors. Follow the on-screen instructions to add the sensor.