Honeywell T4 Pro Programmable Thermostat Installation Instructions Manual

Honeywell T4 Pro Programmable Thermostat

About Honeywell
Honeywell is a multinational conglomerate company that produces a variety of consumer and industrial products, including aircraft engines, automotive products, gas turbine power systems, and home appliances. The company also provides services such as energy management, building automation, and security systems. Honeywell was founded in 1906 and is headquartered in Charlotte, North Carolina.

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
  
• Installation Instructions and User Guide

Optional Cover Plate Installation

NOTE: If Optional Cover Plate is not required, see “UWP Mounting System installation” on next page.
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 the mounting screws supplied with Cover Plate Kit. Do not over-tighten. 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.

UWP Mounting System Installation

1. Before starting, turn the power off at the breaker box or switch. Open the package to find the UWP. See Figure 5.
   
2. 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.
   
3. Pull the door open and insert the wires through the wiring hole of the UWP. See Figure 7.
   
4. Place the UWP over the wall anchors. Insert and tighten mounting screws supplied with the UWP. Do not over tighten. Tighten until the UWP no longer moves. Close the door. See Figure 8.

Power options

Setting Slider Tabs (built-in jumper)

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 T4 Pro models. 

UWP Wiring terminal designations 

* 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 

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

Wiring heat pump systems

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

2H/1C Heat Pump System (TH4210U only)

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

NOTES
Wire specifications: Use 18- to 22-gauge thermostat wire. A 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 (built-in jumper)” on page 3
   
3. Optional 24VAC common connection.
   
4. The common connection must come from the cooling transformer.
   
5. In ISU set Heat system type to Radiant Heat. Set the number of cool stages to 0.
   
6. In Installer Setup, set the changeover valve to O (for cool changeover) or B (for heat changeover).

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.

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

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. 

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 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 the 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 page 10.

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 Note: You can change default MO-FR, SA-SU 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.

# 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 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.
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 the CENTER and buttons for approximately 3 seconds to enter the 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

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.
CAUTION: EQUIPMENT DAMAGE HAZARD
Compressor protection is bypassed during testing. To prevent equipment damage, avoid cycling the compressor quickly.
CAUTION: ELECTRICAL HAZARD
Can cause electrical shock or equipment damage. Disconnect power before beginning installation.

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.

Home and Building Technologies
In the U.S.:
Honeywell
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Golden Valley, MN 55422-3992
customer.honeywell.com
® U.S. Registered Trademark.
© 2017 Honeywell International Inc.
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Printed in U.S.A.

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