Honeywell Home T4 Pro User Manual

  • Post last modified:May 16, 2023
  • Post category:Honeywell

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Honeywell Home T4 Pro

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Programmable Thermostat

Installation Instructions

Package Includes:

  • T4 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

Optional Cover Plate Installation

Use the Optional Cover Plate when:

  • Mounting the thermostat to an electrical junction box
  • Or when you need to cover paint gap from old thermostat.
  1. Before starting, turn the power off at the breaker box or switch. Separate the Junction Box Adapter from the Cover Plate. See Figure 1.
  2. 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. See Figure 2. Make sure the Adapter Plate is level.
  3. 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.
  4. Snap the Cover Plate onto the Junction Box Adapter. See Figure 4.

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UWP Mounting System Installation

  • Before starting, turn the power off at the breaker box or switch. Open 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.

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Power Options

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Setting Slider Tabs (built-in jumper)

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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

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.

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.

Auto: Thermostat selects heating or cooling as needed.
Heat: Thermostat controls only the heating system.
Cool: Thermostat controls only the cooling system.
Em Heat (TH4210U only) (only for heat pumps with auxiliary heat): Thermostat controls Auxiliary Heat. Compressor is not used.
Off: Heating and cooling system is off. Fan will still operate if fan is set to On or Circulate.

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.

Fan modes:
Auto: Fan runs only when the heating or cooling system is on.
On: Fan is always on.

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Installer Setup (ISU)

  1. Press and hold CENTER and + buttons for approximately 3 seconds to enter 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 and confirm your settings or press Back to ignore changes and return to ISU menu screen to continue editing another setup option.
  6. To finish setup process and save your setting, press Home and return to Home screen.

Advanced Setup Options (ISU)

# 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

Note: You can change default MOFR, SASU schedule here. To edit periods during days, temperature setpoints, or to turn Schedule On/Off, touch MENU and go to SCHEDULE.

125 Temperature Indication Scale 0 = Fahrenheit

1 = Celsius

200 Heating System Type 1 = Conventional Forced Air Heat

2 = Heat Pump 3 = Radiant Heat

5 = None (Cool Only)

Note: This option selects the basic system type your thermostat will control.

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

Note: This option selects the equipment type your thermostat will control. Note: This feature is NOT displayed if feature 200 is set to Cool Only.

Advanced Setup Options (ISU) (Continued)

# ISU ISU Name ISU Options (factory default in bold)
218 Reversing Valve O/B 0 = O (O/B in Cool)

1 = B (O/B in Heat)

Note: This option is only displayed if the Heat Pump configured. Select whether reversing valve O/B should energize in cool or in heat.

220 Cool Stages / Compressor Stages 200=Conv / 200=HP 0, 1

Note: Select how many Cool or Compressor stages of your equipment the thermostat will control. Set value to 0 if you do not have Cool Stage/ Compressor Stage.

221 Heat Stages / Backup Heat Stages 1

Note: Select how many Heat or Aux/E stages of your equipment the thermostat will control.

230 Fan Control in Heat 1 = Equipment Controls Fan

2 = Thermostat Controls Fan

Note: This ISU is only displayed if ISU 205 is set to Electric Forced Air or Fan Coil.

300 System Changeover 0 = Manual

1 = Automatic

Note: Thermostat can automatically control both heating and cooling to maintain the desired indoor temperature. To be able to select “automatic” system mode on thermostat home screen, turn this feature ON. Turn OFF if you want to control heating or cooling manually.

303 Auto Changeover Differential 0 °F to 5 °F

0.0 °C to 2.5 °C

Note: Differential is NOT deadband. Differential means how far past the setpoint before switching to the mode selected. Deadband setup is not an option. Honeywell uses an advanced algorithm that fixes deadband at 0

°F. This is more advanced than previous thermostats.

365 Compressor Cycle Rate (Stage 1) 1 – 6

Note: This ISU is only displayed when Cool /Compressor Stage is set t1 stage. Cycle rate limits the maximum number of times the system can cycle in a 1 hour period measured at a 50% load. For example, when set to 3 CPH, at a 50% load, the most the system will cycle is 3 times per

hour (10 minutes on, 10 minutes off). The system cycles less often when load conditions are less than or greater than a 50% load.

370 Heating Cycle Rate (Stage 1) 1 – 12

Note: This ISU is only displayed when Heat Stage is set to 1 stage. Cycle rate limits the maximum number of times the system can cycle in a 1 hour period measured at a 50% load. For example, when set to 3 CPH, at a 50% load, the most the system will cycle is 3 times per hour (10 minutes on, 10 minutes off). The system cycles less often when load conditions are less than or greater than a 50% load. The recommended (default) cycle rate settings are below for each heating equipment type: Standard Efficiency Gas Forced Air = 5 CPH; High Efficiency Gas Forced

Air = 3 CPH; Oil Forced Air = 5 CPH; Electric Forced Air = 9 CPH; Fan Coil = 3 CPH; Hot Water Radiant Heat = 3 CPH; Steam = 1 CPH.

370 Heating Cycle Rate Auxiliary Heat 1 – 12
387 Compressor Protection 0 = Off

1 – 5 minutes

Note: The thermostat has a built in compressor protection (minimum off timer) that prevents the compressor from restarting too early after a shutdown. The minimum-off timer is activated after the compressor

turns off. If there is a call during the minimum-off timer, the thermostat shows “Wait” in the display. This ISU is displayed if ISU 220 is set to at least 1 stage.

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)

Note: The cool temperature cannot be set below this level.

431 Maximum Heat Setpoint 40 °F to 90 °F (90 °F)

4.5 °C to 32.0 °C (32 °C)

Note: The heat temperature cannot be set above this level.

# ISU ISU Name ISU Options (factory default in bold)
435 Keypad Lockout 0 = None

1 = Partial

2 = Full

Note:

Unlocked: User has access to all thermostat settings.

Partially Locked: User can modify only temperature settings.

Fully Locked: User cannot modify any settings. Screen will be locked by default factory code and cannot be changed. This code is displayed for a short time, when you are about to lock the thermostat screen. Please note the code in safe place for future reference.

702 Number of Air Filters 0 – 2

Note: This ISU refers to the number of air filters in the system.

711 Air Filter 1 Replacement Reminder 0 = 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

Note: Set a reminder for when to change your air filter. Choose either calendar or equipment run time-based reminder.
712 Air Filter 2 Replacement Reminder 0 = 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

Note: Set a reminder for when to change your air filter. Choose either calendar or equipment run time-based reminder.
1400 Backlighting 0 = On Demand

1 = Continuous

Note: Common wire needed for continuous.

1401 Backlight brightness 1 – 5

Note: Only displayed if continuous backlight selected.

1410 Clock Format 12 / 24
1415 Daylight Saving Time 0 = Off

1 = On

Note: Set to Off in areas that do not follow Daylight Saving Time.

1420 Temperature Display Offset -3 to 3F (0)

-1.5 to 1.5C (0)

Note: 0 °F No difference in displayed temperature and the actual room temperature. The thermostat can display up to 3 °F (1.5 C) lower or higher than the actual measured temperature.

Installer System Test
To perform a System Test:

  1. Press and hold CENTER and + buttons for approximately 3 seconds to enter advanced menu.
  2. Use + to go to TEST. Press Select to enter System Test.
  3. Use + to change between Heat, Cool, Fan, Em. Heat (TH4210U only), or Ver (thermostat version information). Press Select.
  4. Press + to turn heat, cool, or fan on. Press – to turn them off.
  5. Use the Home button to exit the System Test.
System test System status
 

Heat

0 Heat Off
1 Heat On
 

Cool

0 Cool Off
1 Cool On
 

Fan

0 Fan Off
1 Fan On
 

Em. Heat

(TH4210U only)

0 Em. Heat Off
1 Em. Heat 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)
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 (TH4210U only) 20-30 Vac 0.02-1.0 A
E Emergency Heat (TH4210U only) 20-30 Vac 0.02-0.5 A
Y Compressor Stage 1 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

Customer Assistance

For assistance with this product, please visit customer.honeywell.com. Or call Honeywell Customer Care toll-free at 1-800-468-1502.

Home and Building Technologies
In the U.S.:
Honeywell
1985 Douglas Drive North
Golden Valley, MN 55422-3992
customer.honeywell.com
® U.S. Registered Trademark.
© 2017 Honeywell International Inc.
33-00187EFS—01 M.S. 02-17

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