Honeywell T6 Pro Programmable Thermostat
Package Includes
- T6 Pro Thermostat
- UWP™ Mounting System
- Honeywell Standard Installation Adapter (J-box adapter)
- Honeywell Decorative Cover Plate Small; size 4-49/64 in x 4-49/64 in x 11/32 in (121 mm x 121 mm x 9 mm)
- Screws and anchors
- 2 AA Batteries
- Installation Instructions and User Guide
Optional Cover Plate Installation
NOTE: If an Optional Cover Plate is not required, see “UWP Mounting System installation”.
Use the Optional Cover Plate when
- Mounting the thermostat to an electrical junction box
- Or when you need to cover the paint gap from the old thermostat.
- Separate the Junction Box Adapter from the Cover Plate. See Figure 1.
- Mount the Junction Box Adapter to the wall or an electrical box using any of the eight screw holes. Insert and tighten the mounting screws supplied with Cover Plate Kit. Do not over-tighten. See Figure 2. Make sure the Adapter Plate is level.
- 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 3.
- Snap the Cover Plate onto the Junction Box Adapter. See Figure 4.
UWP Mounting System Installation
- Before starting, turn the power off at the breaker box or switch. Open the package to find the UWP. See Figure 5.
- Position the UWP on wall. Level and mark hole positions. See Figure 6. Drill holes at marked positions, and then lightly tap supplied wall anchors into the wall using a hammer. Drill 7/32” holes for drywall.
- Pull the door open and insert the wires through wiring hole of the UWP. See Figure 7.
- 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 8.
Power options
Insert R and C wires into designated terminals for primary AC power (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
Set R Slider Tab
- Use a 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 T6 Pro models.
Wiring terminal designations
| S | Input for wired indoor or outdoor sensors (TH6320U and TH6220U only) |
| S | |
| Y | Compressor contactor (stage 1) |
| Y2 | Compressor contactor (stage 2) |
| G | Fan Relay |
| C | 24VAC common. For 2 transformer systems, use common wire from the cooling transformer. |
| U |
Unused |
| U |
| L/A – A | Heat Pump fault input (Common (C) wire required for LA/A) |
| O/B | Changeover valve |
| AUX – W2 | Auxiliary heat relay (stage 2) |
| E | Emergency Heat relay |
| W | Heat relay (stage 1) |
| K | Connect to K on Wire Saver Module |
| R | 24VAC power from heating transformer |
| Rc | 24VAC power from the cooling transformer |
Note: Not all terminals may be used, depending on the system type that is being wired. The most commonly used terminals are shaded.
- The terminal can be jumped using Slider Tab. See “Setting Slider Tabs” above.
- The THP9045A1023 Wire Saver Module is used on heat/cool systems when you only have four wires at the thermostat, and you need a fifth wire for a common wire.
- Use the K terminal in place of the Y and G terminals on conventional or heat pump systems to provide control of the fan and the compressor through a single wire the unused wire then becomes your common wire. See THP9045 instructions for more information.
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 relay
- G Fan relay
Heat-only System
- R Power [1]
- Rc [R+Rc joined by Slider Tab] [2]
- C 24VAC common [3]
- W Heat relay
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]
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 relay
- G Fan relay
Heat-only System with Fan
- R Power [1]
- Rc [R+Rc joined by Slider Tab] [2]
- C 24VAC common [3]
- W Heat relay
- G Fan relay
Cool-only System
- R Power [1]
- Rc [R+Rc joined by Slider Tab] [2]
- Y Compressor contactor
- C 24VAC common [3]
- G Fan relay
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 relay (stage 1)
- G Fan relay
- W2 Heat relay (stage 2)
- Y2 Compressor contactor (stage 2)
NOTES: Wire specifications: Use 18- to 22-gauge thermostat wire. Shielded cable is not required.
- Power supply. Provide disconnect means and overload protection as required.
- Move R-Slider Tab on UWP to the R setting. For more information, see “Setting Slider Tabs” on page 3
- Optional 24VAC common connection.
- Common connection must come from cooling transformer.
- In ISU set Heat system type to Radiant Heat. Set number of cool stages to 0.
- 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 relay
- 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 relay
- Aux Auxiliary heat
- E Emergency heat relay
- 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 relay
- 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 relay
- Aux Auxiliary heat
- E Emergency heat relay
- 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 relay
- Aux Auxiliary heat
- E Emergency heat relay
- 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. A shielded cable is not required.
- Power supply. Provide disconnect means and overload protection as required.
- Move R-Slider Tab on UWP to the R setting. For more information, see “Setting Slider Tabs”.
- Optional 24VAC common connection.
- In Installer Setup, set the system type to 2Heat/2Cool Conventional.
- In Installer Setup, set the changeover valve to O (for cool changeover) or B (for heat changeover).
- In ISU set Heat system type to Heat pump. 1 compressor and 1 stage of backup heat.
- In ISU set Heat system type to Heat pump. 2 compressors and 0 stage of backup heat.
- In ISU set Heat system type to Heat pump. 2 compressors and 1 stage of backup heat.
- Dual fuel with Y2 only for TH6320U.
Thermostat mounting
- Push excess wire back into the wall opening.
- Close the UWP door. It should remain closed without bulging.
- Align the UWP with the thermostat, and push gently until the thermostat snaps in place.
- Turn the power on at the breaker box or switch.
Set the time and date
Time
- Press Menu on your thermostat.
- Press +or– to go to TIME. Press Select.
- Press +or– to choose between 12 or 24 hour. Press Select.
- Use +or– adjust the hour. Press Select.
- Use +or– to adjust the minutes. Press Select to exit Time menu.
Date
- If previously setting time, continue to Step
- If at the Home screen, press Menu on your thermostat.
- Press +or– to go to DATE. Press Select.
- Use +or– to adjust year. Press Select.
- Use the +or– to adjust month. Press Select.
- Use the+ or– to adjust day. Press Select to save and exit Date menu.
System operation settings
- Press the Mode button to cycle to the next available System mode.
- 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
- Press the Fan button to cycle to the next available Fan mode.
- Cycle through the modes until the required Fan mode is displayed and leave it to activate.
NOTE: Available Fan modes vary with the system settings.
Fan modes
- Auto: The fan runs only when the heating or cooling system is on.
- On: The fan is always on.
- Circ: Fan runs randomly about 33% of the time.
Alerts or Reminders
- Press Menu, and then press+ until the display shows ALRT.
- Press Select to display which alert(s) are present.
- The word SNZE (SNOOZE) appears.
- Press Select again to snooze the reminder for 7 days.
- To clear the alert, press Select, and then press+ to go to CLER (Clear).
- 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)
- Press and hold CENTER and +buttons for approximately 3 seconds to enter advanced menu.
- Press Select to enter ISU.
- Press Select to cycle through menu setup options.
- Press +or– to change values or select from available options.
- Press Select and confirm your settings or press Back to ignore changes and return to ISU menu screen to continue editing another setup option.
- To finish setup process and save your setting, press Home and return to Home screen.
NOTE: A complete list of all setup (ISU) parameters and options starts below and continues through.
Advanced setup options (ISU)
NOTE: Depending on system settings, not all options may be available.
| # ISU | ISU Name | ISU Options (factory default in bold) |
| 120 | Scheduling Options | 0 = Non-Programmable 2 = 5-2 Programmable 3 = 5-1-1 Programmable 4 = 7-Day Programmable |
| 125 | Temperature Indication Scale | 0 = Fahrenheit 1 = Celsius |
| 130 | Outdoor Sensor (TH6320U / TH6220U only) | 0 = None 1 = Wired Outdoor Sensor |
| 200 | Heating System Type | 1 = Conventional Forced Air Heat 2 = Heat Pump 3 = Radiant Heat 5 = None (Cool Only) |
| 205 | Heating Equipment Type | Conventional 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 |
| 218 | Reversing Valve O/B | 0 = O (O/B in Cool) 1 = B (O/B in Heat) |
| 220 | Cool Stages / Compressor Stages 200=Conv / 200=HP | 0, 1, 2 Note: Only 1 compressor stage is available on the TH6210U model. Only 1 compressor stage available on TH6220U model if configured for a heat pump. |
| # ISU | ISU Name | ISU Options (factory default in bold) |
| 221 | Heat Stages / Backup Heat Stages | Heat Stages: 1, 2 Backup Heat Stages: 0, 1 |
| 230 | Fan Control in Heat | 1 = Equipment Controls Fan 2 = Thermostat Controls Fan |
| 253 | Aux/E terminal control (Fixed to “0” setting on all models except TH6320U) | 0 = Drive both Aux & E together 1 = Aux and E independent |
| 255 | Backup Heat Source (Heat Pump Only) (TH6320U / TH6220U only) | 1 = Electric Forced Air 2 = Gas/Oil Forced Air (or Fossil Forced Air) |
| 256 | Emergency Heat Source (TH6320U only) | 1 = Electric Forced Air 2 = Gas/Oil Forced Air (or Fossil Forced Air) |
| 260 | External Fossil Fuel Kit (TH6320U / TH6220U only) | 0 = Thermostat Controls Backup Heat 1 = External Fossil Fuel Kit Controls Backup Heat |
| 300 | System Changeover | 0 = Manual 1 = Automatic |
| 303 | Auto Changeover Differential | 0 °F to 5 °F 0.0 °C to 2.5 °C Note: Differential is NOT deadband. Honeywell 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. |
| 340 | Backup Heat Droop | 0 = Comfort 9 = 9 °F 2 = 2 °F 10 = 10 °F 3 = 3 °F 11 = 11 °F 4 = 4 °F 12 = 12 °F 5 = 5 °F 13 = 13 °F 6 = 6 °F 14 = 14 °F 7 = 7 °F 15 = 15 °F 8 = 8 °F Note: 0 (comfort) setting only available if backup heat (ISU 255) is set to electric. |
| 350 | Upstage Timer for Backup Heat | 0 = Off 8 = 4 hours 1 = 30 minutes 9 = 5 hours 2 = 45 minutes 10 = 6 hours 3 = 60 minutes 11 = 8 hours 4 = 75 minutes 12 = 10 hours 5 = 90 minutes 13 = 12 hours 6 = 2 hours 14 = 14 hours 7 = 3 hours 16 = 16 hours |
| 355 | Compressor Lockout / Balance Point | — = Off 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. |
| 356 | Outdoor Lockout Backup Heat | — = Off 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) |
| 365 | Compressor Cycle Rate (Stage 1) | 1 – 6 |
| 366 | Compressor Cycle Rate (Stage 1) | 1 – 6 |
| 370 | Heating Cycle Rate (Stage 1) | 1 – 12 |
| 371 | Heating Cycle Rate (Stage 2) | 1 – 12 |
| 375 | Heating Cycle Rate Auxiliary Heat | 1 – 12 |
| 378 | Heating Cycle Rate Emergency Heat (TH6320U only) | 1 – 12 |
| 387 | Compressor Protection | 0 = Off 1 – 5 minutes |
| 425 | Adaptive Intelligent Recovery | 0 = 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. |
| 430 | Minimum Cool Setpoint | 50 °F to 99 °F (50 °F) 10.0 °C to 37.0 °C (10.0 °C) |
| 431 | Maximum Heat Setpoint | 40 °F to 90 °F (90 °F) 4.5 °C to 32.0 °C (32.0 °C) |
| 435 | Keypad Lockout | 0 = None 1 = Partial 2 = Full |
| 500 | Is Indoor Temperature Sensor WIRED to your system? (TH6320U / TH6220U only) | 0 = No 1 = Yes |
| 515 | Indoor Sensor type (TH6320U / TH6220U only) | 0 = 10k 1 = 20k |
| 520 | Which Sensors will be used for TEMPERATURE Control? (Multiple Sensors are Averaged) TH6320U / TH6220U only) | 1 = Thermostat Only 2 = Wired Only 3 = Average |
| 702 | Number of Air Filters | 0 – 2 |
| 711 | Air Filter 1 Replacement Reminder | 0 = Off 10 = 45 Calendar Days 1 = 10 Run Time Days 11 = 60 Calendar Days 2 = 20 Run Time Days 12 = 75 Calendar Days 3 = 30 Run Time Days 13 = 3 Calendar Months 4 = 45 Run Time Days 14 = 4 Calendar Months 5 = 60 Run Time Days 15 = 5 Calendar Months 6 = 90 Run Time Days 16 = 6 Calendar Months 7 = 120 Run Time Days 17 = 9 Calendar Months 8 = 150 Run Time Days 18 = 12 Calendar Months 9 = 30 Calendar Days 19 = 15 Calendar Months |
| 712 | Air Filter 2 Replacement Reminder | 0 = Off 10 = 45 Calendar Days 1 = 10 Run Time Days 11 = 60 Calendar Days 2 = 20 Run Time Days 12 = 75 Calendar Days 3 = 30 Run Time Days 13 = 3 Calendar Months 4 = 45 Run Time Days 14 = 4 Calendar Months 5 = 60 Run Time Days 15 = 5 Calendar Months 6= 90 Run Time Days 16 = 6 Calendar Months 7 = 120 Run Time Days 17 = 9 Calendar Months 8 = 150 Run Time Days 18 = 12 Calendar Months 9 = 30 Calendar Days 19 = 15 Calendar Months |
| 1400 | Backlighting | 0 = On Demand 1 = Continuous Note: Common wire needed for continuous. |
| 1401 | Backlight brightness | 1 – 5 Note: Only displayed if the continuous backlight is selected. |
| 1410 | Clock Format | 12 / 24 |
| 1415 | Daylight Saving Time | 0 = Off 1 = On |
| 1420 | Temperature Display Offset | -3 to 3F (0) -1.5 to 1.5C (0) |
Installer system test
To perform a System Test
- Press and hold the CENTER and+ buttons for approximately 3 seconds to enter the advanced menu.
- Use+ to go to TEST. Press Select to enter System Test.
- Use+ to change between Heat, Cool, Fan, Em Heat, or Ver (thermostat version information). Press Select.
- Press+ to turn stages on one at a time, and press to turn them off.
- Use– the Home button to exit the System Test.
System test /System status
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
| Terminal | Voltage (50/60Hz) | Running Current |
| W Heating | 20-30 Vac | 0.02-1.0 A |
| (Powerpile) | 750 mV DC | 100 mA DC |
| W2 (Aux) Heating | 20-30 Vac | 0.02-1.0 A |
| E Emergency Heat | 20-30 Vac | 0.02-0.5 A |
| Y Compressor Stage 1 | 20-30 Vac | 0.02-1.0 A |
| Y2 Compressor Stage 2 | 20-30 Vac | 0.02-1.0 A |
| G Fan | 20-30 Vac | 0.02-0.5 A |
| O/B Changeover | 20-30 Vac | 0.02-0.5 A |
| L/A Input | 20-30 Vac | 0.02-0.5 A |
Troubleshooting
If you have difficulty with your thermostat, please try the following suggestions. Most problems can be corrected quickly and easily.
Display is blank
- Check circuit breaker and reset if necessary.
- Make sure power switch for heating & cooling system is on.
- Make sure furnace door is closed securely.
- Make sure fresh AA alkaline batteries are correctly installed.
The heating or cooling system does not respond
- Press the Mode button to set system Heat. Make sure the desired temperature is set higher than the inside temperature.
- Press Mode button to set system Cool. Make sure the desired temperature is set lower than the inside temperature.
- Check circuit breaker and reset if necessary.
- Make sure power switch for 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
- The 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”.
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.
CAUTION: ELECTRICAL HAZARD
- Can cause electrical shock or equipment damage. Disconnect power before beginning installation.
CAUTION: EQUIPMENT DAMAGE HAZARD
- Compressor protection is bypassed during testing. To prevent equipment damage, avoid cycling the compressor quickly.
CAUTION: 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.
Customer Assistance
- For assistance with this product, please visit customer.honeywell.com.
- Or call Honeywell Customer Care toll-free at 1-800-468-1502.
Pull to remove the thermostat from the UWP.
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- customer.honeywell.com
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© 2018 Honeywell International Inc.
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