Honeywell Home T6 Pro Programmable Thermostat

Installation Instructions

Package Includes:

  • T6 Pro Thermostat
  • UWP™ Mounting System
  • Decorative Cover Plate
  • Screws and Anchors
  • 2 AA Batteries
  • Thermostat Literature

Optional Cover Plate Installation

If an Optional Cover Plate is not required, refer to the "UWP Mounting System installation" section on the next page. The Optional Cover Plate is used to cover paint gaps left by an old thermostat. Different cover plates may be provided depending on the thermostat's manufacturing date.

For the Square Cover Plate:

  1. Separate the Cover Plate from the Mounting Plate.
  2. Mount the Mounting Plate onto the wall using any of the 8 provided screw holes. Insert and tighten the mounting screws supplied with the Cover Plate Kit. Do not overtighten. Ensure the Mounting Plate is level.
  3. Attach the UWP by hanging it on the top hook of the Mounting Plate and then snapping the bottom of the UWP into place.
  4. Snap the Cover Plate onto the Mounting Plate.

For the Rectangular Cover Plate:

  1. Mount the Cover Plate on the wall using any of the 6 provided screw holes. Insert and tighten the mounting screws supplied with the Cover Plate. Do not overtighten. Ensure the Cover Plate is level. Attach the UWP by hanging it on the top hook of the Cover Plate and then snapping the bottom of the UWP into place.
  2. If no existing wall anchors are present: Position the Cover Plate on the wall, level it, and mark hole positions. Drill holes at the marked positions, and then lightly tap the supplied wall anchors into the wall using a hammer.
    • For red anchors, drill 7/32" (5.6 mm) holes.
    • For yellow anchors, drill 3/16" (4.8 mm) holes.
    • Use 2x supplied screws (#8 1-1/2" for red anchors and #6 1-1/2" for yellow anchors).

UWP Mounting System Installation

  1. Before starting, turn off the power at the breaker box or switch. Open the package to find the UWP.
  2. Position the UWP on the wall, level it, and mark hole positions. Drill holes at the marked positions, and then lightly tap the supplied wall anchors into the wall using a hammer.
    • If your box contains red anchors, drill 7/32" holes.
    • If your box contains yellow anchors, drill 3/16" holes.
  3. Pull the door open and insert the wires through the wiring hole of the UWP.
  4. Place the UWP over the wall anchors. Insert and tighten the mounting screws supplied with the UWP. Do not overtighten. Tighten until the UWP no longer moves. Close the door.

Power Options

Insert R and C wires into designated terminals for primary AC power. The C terminal is optional if batteries are installed, but it is recommended. Remove wires by depressing the terminal tabs.

Insert AA batteries for primary or backup power.

Setting Slider Tabs

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

  • If there is only one R wire 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 T6 Pro models.

Wiring Terminal Designations

The following table outlines the UWP Mounting System terminal designations:

TerminalDesignationDescription
SInput for wired indoor or outdoor sensors (TH6320U and TH6220U only)Heat Pump fault input (Common (C) wire required for L/A)
S
O/BChangeover valve
YCompressor contactor (stage 1)
AUX - W2Auxiliary heatHeat (stage 2)
Y2Compressor contactor (stage 2)
EEmergency Heat
GFanHeat (stage 1)
C24VAC common. For 2 transformer systems, use common wire from cooling transformer.Unused
UUnused24VAC power from heating transformer*
U24VAC power from cooling transformer*
R
Rc

Note: Not all terminals may be used, depending on the system type being wired. The most commonly used terminals are shaded.

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

Wiring Conventional Systems: Forced Air and Hydronics

Shaded areas below apply only to TH6320U/TH6220U or as otherwise noted.

1H/1C System (1 transformer)

  • R: Power [1]
  • Rc: [R+Rc joined by Slider Tab] [2]
  • Y: Compressor contactor
  • C: 24VAC common [3]
  • W: Heat
  • G: Fan

1H/1C System (2 transformers)

  • R: Power (heating transformer) [1]
  • Rc: Power (cooling transformer) [1]
  • Y: Compressor contactor
  • C: 24VAC common [3, 4]
  • W: Heat
  • G: Fan

Heat-only System

  • R: Power [1]
  • Rc: [R+Rc joined by Slider Tab] [2]
  • C: 24VAC common [3]
  • W: Heat

Heat-only System with Fan

  • R: Power [1]
  • Rc: [R+Rc joined by Slider Tab] [2]
  • C: 24VAC common [3]
  • W: Heat
  • G: Fan

Heat-only System (Series 20) [5]

  • R: Series 20 valve terminal "R" [1]
  • Rc: [R+Rc joined by Slider Tab] [2]
  • Y: Series 20 valve terminal "W"
  • C: 24VAC common [3]
  • W: Series 20 valve terminal "B"

Heat-only System (power open zone valve) [5]

  • R: Power [1]
  • Rc: [R+Rc joined by Slider Tab] [2]
  • W: Valve
  • C: 24VAC common [3]

Cool-only System

  • R: Power [1]
  • Rc: [R+Rc joined by Slider Tab] [2]
  • Y: Compressor contactor
  • C: 24VAC common [3]
  • G: Fan

2H/2C System (1 transformer) [6]

  • R: Power [1]
  • Rc: [R+Rc joined by Slider Tab] [2]
  • Y: Compressor contactor (stage 1)
  • C: 24VAC common [3]
  • W: Heat (stage 1)
  • G: Fan
  • W2: Heat (stage 2)
  • Y2: Compressor contactor (stage 2)

NOTES

Wire specifications: Use 18- to 22-gauge thermostat wire. Shielded cable is not required.

[1] Power supply. Provide disconnect means and overload protection as required.

[2] Move R-Slider Tab on UWP to the R setting. For more information, see "Setting Slider Tabs" on page 3.

[3] Optional 24VAC common connection.

[4] Common connection must come from cooling transformer.

[5] In ISU set Heat system type to Radiant Heat. Set number of cool stages to 0.

[6] In Installer Setup, set system type to 2Heat/2Cool Conventional.

Wiring Heat Pump Systems

Shaded areas below apply only to TH6320U/TH6220U or as otherwise noted.

1H/1C Heat Pump System

  • R: Power [1]
  • Rc: [R+Rc joined by Slider Tab] [2]
  • Y: Compressor contactor
  • C: 24VAC common [3]
  • O/B: Changeover valve [7]
  • G: Fan
  • W: Do not use this terminal for heat pump applications!

2H/1C Heat Pump System [8]

  • R: Power [1]
  • Rc: [R+Rc joined by Slider Tab] [2]
  • Y: Compressor contactor
  • C: 24VAC common [3]
  • O/B: Changeover valve [7]
  • G: Fan
  • Aux: Auxiliary heat
  • E: Emergency heat
  • L: Heat pump fault input
  • W: Do not use this terminal for heat pump applications!

2H/2C Heat Pump System (TH6320U only) [9]

  • R: Power [1]
  • Rc: [R+Rc joined by Slider Tab] [2]
  • Y: Compressor contactor (stage 1)
  • C: 24VAC common [3]
  • O/B: Changeover valve [7]
  • G: Fan
  • Y2: Compressor contactor (stage 2)
  • L: Heat pump fault input
  • W: Do not use this terminal for heat pump applications!

3H/2C Heat Pump System (TH6320U only) [10]

  • R: Power [1]
  • Rc: [R+Rc joined by Slider Tab] [2]
  • Y: Compressor contactor (stage 1)
  • C: 24VAC common [3]
  • O/B: Changeover valve [7]
  • G: Fan
  • Aux: Auxiliary heat
  • E: Emergency heat
  • Y2: Compressor contactor (stage 2)
  • L: Heat pump fault input
  • W: Do not use this terminal for heat pump applications!

Dual Fuel System (TH6320U / TH6220U only)

  • R: Power [1]
  • Rc: [R+Rc joined by Slider Tab] [2]
  • Y: Compressor contactor (stage 1)
  • C: 24VAC common [3]
  • O/B: Changeover valve [7]
  • G: Fan
  • Aux: Auxiliary heat
  • E: Emergency heat
  • Y2: Compressor contactor (stage 2 - if needed) [11]
  • L: Heat pump fault input
  • S: Outdoor sensor
  • S: Outdoor sensor
  • W: Do not use this terminal for heat pump applications!

NOTES

Wire specifications: Use 18- to 22-gauge thermostat wire. Shielded cable is not required.

[1] Power supply. Provide disconnect means and overload protection as required.

[2] Move R-Slider Tab on UWP to the R setting. For more information, see "Setting Slider Tabs" on page 3.

[3] Optional 24VAC common connection.

[6] In Installer Setup, set system type to 2Heat/2Cool Conventional.

[7] In Installer Setup, set changeover valve to O (for cool changeover) or B (for heat changeover).

[8] In ISU set Heat system type to Heat pump. 1 compressor and 1 stage of backup heat.

[9] In ISU set Heat system type to Heat pump. 2 compressors and 0 stage of backup heat.

[10] In ISU set Heat system type to Heat pump. 2 compressors and 1 stage of backup heat.

[11] Dual fuel with Y2 only for TH6320U.

Thermostat Mounting

  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.
  4. Turn the power on at the breaker box or switch.

Set the Time and Date

Time

  1. Press Menu on your thermostat.
  2. Press the '+' or '-' buttons to go to TIME. Press Select.
  3. Press the '+' or '-' buttons to choose between 12 or 24 hour format. Press Select.
  4. Use the '+' or '-' buttons to adjust the hour. Press Select.
  5. Use the '+' or '-' buttons to adjust the minutes. Press Select to exit the Time menu.

Date

  1. If you previously set the time, continue to Step 2. If you are at the Home screen, press Menu on your thermostat.
  2. Press the '+' or '-' buttons to go to DATE. Press Select.
  3. Use the '+' or '-' buttons to adjust the year. Press Select.
  4. Use the '+' or '-' buttons to adjust the month. Press Select.
  5. Use the '+' or '-' buttons to adjust the day. Press Select to save and exit the Date menu.

System Operation Settings

  1. Press the Mode button to cycle to the next available System mode.
  2. Cycle through the modes until the required System mode is displayed and leave it to activate.

Note: Available System modes vary by model and system settings.

System modes: Auto, Heat, Cool, Em Heat, Off.

Fan Operation Settings

  1. Press the Fan button to cycle to the next available Fan mode.
  2. Cycle through the modes until the required Fan mode is displayed and leave it to activate.

Note: Available Fan modes vary with system settings.

Fan modes:

  • Auto: Fan runs only when the heating or cooling system is on.
  • On: Fan is always on.
  • Circ: Fan runs randomly about 33% of the time.

Alerts or Reminders*

  1. Press Menu, and then press '+' until the display shows ALRT.
  2. Press Select to display which alert(s) are present.
  3. The word SNZE (SNOOZE) appears.
  4. Press Select again to snooze the reminder for 7 days.
  5. To clear the alert, press Select, and then press '+' to go to CLER (Clear).
  6. Press Select to clear the reminder.

* Some alerts cannot be snoozed or cleared. Please call your local heating and cooling professional if this occurs. The heating and cooling system may require service.

Installer Setup (ISU)

  1. Press and hold the CENTER and '+' buttons for approximately 3 seconds to enter the advanced menu.
  2. Press Select to enter ISU.
  3. Press Select to cycle through menu setup options.
  4. Press '+' or '-' to change values or select from available options.
  5. Press Select to confirm your settings or press Back to ignore changes and return to the ISU menu screen to continue editing another setup option.
  6. To finish the setup process and save your settings, press Home and return to the Home screen.

Note: A complete list of all setup (ISU) parameters and options starts below and continues through page 10.

Advanced Setup Options (ISU)

Note: Depending on system settings, not all options may be available.

# ISUISU NameISU Options (factory default in bold)
120Scheduling Options0 = Non-Programmable
2 = 5-2 Programmable
3 = 5-1-1 Programmable
4 = 7-Day Programmable
125Temperature Indication Scale0 = Fahrenheit
1 = Celsius
130Outdoor Sensor (TH6320U/TH6220U only)0 = None
1 = Wired Outdoor Sensor
200Heating System Type1 = Conventional Forced Air Heat
2 = Heat Pump
3 = Radiant Heat
5 = None (Cool Only)
205Heating Equipment TypeConventional Forced Air Heat:
1 = Standard Efficiency Gas Forced Air
2 = High Efficiency Gas Forced Air
3 = Oil Forced Air
4 = Electric Forced Air
5 = Hot Water Fan Coil
Heat Pump:
7 = Air to Air Heat Pump
8 = Geothermal Heat Pump
Radiant Heat:
9 = Hot Water Radiant Heat
12 = Steam
218Reversing Valve O/B0 = O (O/B in Cool)
1 = B (O/B in Heat)
220Cool Stages / Compressor Stages (200=Conv/200=HP)0, 1, 2
Note: Only 1 compressor stage available on TH6210U model. Only 1 compressor stage available on TH6220U model if configured for heat pump.
221Heat Stages / Backup Heat StagesHeat Stages: 1, 2
Backup Heat Stages: 0, 1
230Fan Control in Heat1 = Equipment Controls Fan
2 = Thermostat Controls Fan
253Aux/E terminal control (Fixed to "0" setting on all models except TH6320U)0 = Drive both Aux & E together
1 = Aux and E independent
255Backup Heat Source (Heat Pump Only) (TH6320U/TH6220U only)1 = Electric Forced Air
2 = Gas/Oil Forced Air (or Fossil Forced Air)
256Emergency Heat Source (TH6320U only)1 = Electric Forced Air
2 = Gas/Oil Forced Air (or Fossil Forced Air)
260External Fossil Fuel Kit (TH6320U/TH6220U only)0 = Thermostat Controls Backup Heat
1 = External Fossil Fuel Kit Controls Backup Heat
300System Changeover0 = Manual
1 = Automatic
303Auto Changeover Differential0 °F to 5 °F (0.0 °C to 2.5 °C)
Note: Differential is NOT deadband. Resideo uses an advanced algorithm that fixes deadband at 0 °F. The differential setting is the minimum number of degrees from set-point needed to switch from the last mode running (heat or cool) to the opposite mode when the thermostat is in auto-changeover. This is more advanced than previous thermostats.
340Backup Heat Droop0 = Comfort
2 = 2 °F
3 = 3 °F
4 = 4 °F
5 = 5 °F
6 = 6 °F
7 = 7 °F
8 = 8 °F
9 = 9 °F
10 = 10 °F
11 = 11 °F
12 = 12 °F
13 = 13 °F
14 = 14 °F
15 = 15 °F
350Upstage Timer for Backup Heat0 = Off
1 = 30 minutes
2 = 45 minutes
3 = 60 minutes
4 = 75 minutes
5 = 90 minutes
6 = 2 hours
7 = 3 hours
8 = 4 hours
9 = 5 hours
10 = 6 hours
11 = 8 hours
12 = 10 hours
13 = 12 hours
14 = 14 hours
16 = 16 hours
Note: 0 (comfort) setting only available if backup heat (ISU 255) is set to electric.
355Compressor Lockout / Balance PointOff
5 °F to 60 °F (in 5 °F increments)
-15.0 °C to 15.5 °C (in 2.5 °C or 3.0 °C increments)
Note: Use a wired sensor to set compressor lockout / balance point on TH6320U / TH6220U.
356Outdoor Lockout Backup HeatOff
5 °F to 65 °F (in 5 °F increments)
-15.0 °C to 18.5 °C (in 2.5 °C or 3.0 °C increments)
365Compressor Cycle Rate (Stage 1)1-6
366Compressor Cycle Rate (Stage 2)1-6
370Heating Cycle Rate (Stage 1)1-12
371Heating Cycle Rate (Stage 2)1-12
375Heating Cycle Rate Auxiliary Heat1-12
378Heating Cycle Rate Emergency Heat (TH6320U only)1-12
387Compressor Protection0 = Off
1-5 minutes
425Adaptive Intelligent Recovery0 = No
1 = Yes
Note: Adaptive Intelligent Recovery (AIR) is a comfort setting. Heating or cooling equipment will turn on earlier, ensuring the indoor temperature will match the setpoint at the scheduled time.
430Minimum Cool Setpoint50 °F to 99 °F (50 °F)
10.0 °C to 37.0 °C (10.0 °C)
431Maximum Heat Setpoint40 °F to 90 °F (90 °F)
4.5 °C to 32.0 °C (32.0 °C)
435Keypad LockoutSeries 0-6 (setting on original T6 models):
0 = None
1 = Partial
2 = Full
Series 7 (setting current T6 models):
0 = Disabled
1 = Enabled
Note: Due to customer feedback this feature was changed. On series 0-6 thermostats, you can lockout the thermostat from the ISU the same as you can from menu lockout. For series 7 or later, this setting allows the contractor to enable or disable the lockout feature. When disabled, there is no lockout option under menu.
500Is Indoor Temperature Sensor WIRED to your system? (TH6320U/TH6220U only)0 = No
1 = Yes
515Indoor Sensor type (TH6320U/TH6220U only)0 = 10k
1 = 20k
520Which Sensors will be used for TEMPERATURE Control? (Multiple Sensors are Averaged) TH6320U/TH6220U only)1 = Thermostat Only
2 = Wired Only
3 = Average
702Number of Air Filters0-2
711Air Filter 1 Replacement Reminder0 = Off
1 = 10 Run Time Days
2 = 20 Run Time Days
3 = 30 Run Time Days
4 = 45 Run Time Days
5 = 60 Run Time Days
6 = 90 Run Time Days
7 = 120 Run Time Days
8 = 150 Run Time Days
9 = 30 Calendar Days
10 = 45 Calendar Days
11 = 60 Calendar Days
12 = 75 Calendar Days
13 = 3 Calendar Months
14 = 4 Calendar Months
15 = 5 Calendar Months
16 = 6 Calendar Months
17 = 9 Calendar Months
18 = 12 Calendar Months
19 = 15 Calendar Months
712Air Filter 2 Replacement Reminder0 = Off
1 = 10 Run Time Days
2 = 20 Run Time Days
3 = 30 Run Time Days
4 = 45 Run Time Days
5 = 60 Run Time Days
6 = 90 Run Time Days
7 = 120 Run Time Days
8 = 150 Run Time Days
9 = 30 Calendar Days
10 = 45 Calendar Days
11 = 60 Calendar Days
12 = 75 Calendar Days
13 = 3 Calendar Months
14 = 4 Calendar Months
15 = 5 Calendar Months
16 = 6 Calendar Months
17 = 9 Calendar Months
18 = 12 Calendar Months
19 = 15 Calendar Months
1400Backlighting0 = On Demand
1 = Continuous
Note: Common wire needed for continuous.
1401Backlight brightness1-5
Note: Only displayed if continuous backlight selected.
1410Clock Format12/24
1415Daylight Saving Time0 = Off
1 = On
1420Temperature Display Offset-3 to 3F (0)
-1.5 to 1.5C (0)

Installer System Test

To perform a System Test:

  1. Press and hold the CENTER and '+' buttons for approximately 3 seconds to enter the advanced menu.
  2. Use the '+' button to go to TEST. Press Select to enter System Test.
  3. Use the '+' button to change between Heat, Cool, Fan, Em Heat, or Ver (thermostat version information). Press Select.
  4. Press '+' to turn stages on one at a time, and press '-' to turn them off.
  5. Use the Home button to exit the System Test.

System Test System Status

Shaded areas below apply only to TH6320U/TH6220U or as otherwise noted.

System Status
Heat0 = All Off
1 = Heat Stage 1 on
2 = Heat Stage 2 also on
3 = Heat Stage 3 also on
Cool0 = All Off
1 = Cool Stage 1 on
2 = Cool Stage 2 also on
Em Heat0 = All Off
1 = Em Heat on
Fan0 = Fan Off
1 = Fan On

Specifications

Temperature 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)

Working Ambient Temperature

32 °F to 120 °F (0 °C to 48.9 °C)

Operating Ambient Temperature

37 °F to 102 °F (2.8 °C to 38.9 °C)

Shipping Temperature

-20 °F to 120 °F (-28.9 °C to 48.9 °C)

Operating Relative Humidity

5% to 90% (non-condensing)

Physical Dimensions in inches (mm) (H x W x D)

4-1/16" H x 4-1/16" W x 1-5/32" D (103.5 mm H x 103.5 mm W x 29 mm D)

Electrical Ratings

TerminalVoltage (50/60Hz)Running Current
W Heating20-30 Vac0.02-1.0 A
W2 (Aux) Heating20-30 Vac0.02-1.0 A
E Emergency Heat20-30 Vac0.02-0.5 A
Y Compressor Stage 120-30 Vac0.02-1.0 A
Y2 Compressor Stage 220-30 Vac0.02-1.0 A
G Fan20-30 Vac0.02-0.5 A
O/B Changeover20-30 Vac0.02-0.5 A
L/A Input20-30 Vac0.02-0.5 A

Troubleshooting

If you have difficulty with your thermostat, try the following suggestions. Most problems can be corrected quickly and easily.

Display is blank

  • Check circuit breaker and reset if necessary.
  • Make sure the power switch for the heating & cooling system is on.
  • Make sure the furnace door is closed securely.
  • Make sure fresh AA alkaline batteries are correctly installed (see page 3).

Heating or cooling system does not respond

  • Press the Mode button to set the system to Heat (see page 7). Make sure the desired temperature is set higher than the inside temperature.
  • Press the Mode button to set the system to Cool (see page 7). Make sure the desired temperature is set lower than the inside temperature.
  • Check circuit breaker and reset if necessary.
  • Make sure the power switch for the heating & cooling system is on.
  • Make sure the furnace door is closed securely.
  • Wait 5 minutes for the system to respond.

Temperature settings do not change

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)

"Cool On" or "Heat On" is flashing

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

Aux heat runs in cooling

For heat pump systems, verify there is not a wire attached to W on UWP systems. See "Wiring heat pump systems" on page 5.

Cool runs with a call for heat

For heat pump systems, verify there is not a wire attached to W on UWP systems. See "Wiring heat pump systems" on page 5.

Cautions and Customer Assistance

Cautions:

  • ELECTRICAL HAZARD: Can cause electrical shock or equipment damage. Disconnect power before beginning installation.
  • EQUIPMENT DAMAGE HAZARD: Compressor protection is bypassed during testing. To prevent equipment damage, avoid cycling the compressor quickly.
  • MERCURY NOTICE: If this product is replacing a control that contains mercury in a sealed tube, do not place the old control in the trash. Contact your local waste management authority for instructions regarding recycling and proper disposal.
  • ELECTRONIC WASTE NOTICE: The product and batteries should not be disposed of with other household waste. Check for the nearest authorized collection centers or authorized recyclers. The correct disposal of end-of-life equipment will help prevent negative consequences for the environment and human health.

FCC Statement:

Available at: https://customer.resideo.com/en-US/support/residential/codes-and-standards/FCC15105/Pages/default.aspx

Customer Assistance:

For assistance with this product, please visit customer.resideo.com.

Or call Resideo Customer Care toll-free at 1-800-468-1502.

Resideo Information:

Resideo Technologies Inc.
1985 Douglas Drive North, Golden Valley, MN 55422
1-800-468-1502
33-00181EFS-19 M.S. Rev. 05-22 | Printed in United States

© 2022 Resideo Technologies, Inc. All rights reserved. The Honeywell Home trademark is used under license from Honeywell International, Inc. This product is manufactured by Resideo Technologies, Inc. and its affiliates.

Models: TH6320U2008, TH6220U2000, TH6210U2001, T6 Pro, T6 Pro Programmable Thermostat, Programmable Thermostat, Thermostat

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