Optional Cover Plate Installation
Use the Optional Cover Plate when:
UWP Mounting System installation
Power options
Set R Slider Tab.
UWP Wiring terminal designations
| S |
Not used for T1 thermostat. | L/A – A | Not used for T1 thermostat. | |
| S | O/B | Changeover Valve (TH1110D only) | ||
| Y | Compressor contactor (stage 1) | AUX – W2 | Not used for T1 thermostat. | |
| Y2 | Not used for T1 thermostat. | E | Not used for T1 thermostat. | |
| G | Fan Relay | W | Heat relay (stage 1) | |
| C | 24VAC common. For 2 transformer systems, use common wire from cooling transformer. | K | Not used for T1 thermostat. | |
| U | Not used for T1 thermostat. | R | 24VAC power from heating transformer* | |
| U | Rc | 24VAC power from cooling transformer* |
1H/1C System (1 transformer)
Heat-only System
Heat-only System (Series 20) [5]
Heat-only System
1H/1C System (2 transformers)
Heat-only System with Fan
Cool-only System
1H/1C Heat Pump System
System operation settings
System modes:
Fan modes:
Installer setup (ISU)
| # ISU | ISU Name | ISU Options (factory default in bold) |
| 125 | Temperature Indication Scale | 0 = Fahrenheit 1 = Celsius |
| 200 | Heating System Type | 1 = Conventional Forced Air Heat 2 = Heat Pump (TH1110D only) 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. |
| 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. |
| # ISU | ISU Name | ISU Options (factory default in bold) |
| 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. This ISU will not be shown on TH1010D model. |
| 221 | Heat Stages | 0, 1 Note: Select how many Heat stages of your equipment the thermostat will control. This ISU will not be shown on TH1010D model. |
| 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. |
| 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. This ISU will not be shown on TH1010D model unless ISU 200 is set to 5 (cool only). |
| 431 | Maximum Heat Setpoint | 32 °F to 90 °F (90 °F) 0 °C to 32.0 °C (32 °C) Note: The heat temperature cannot be set above this level. This ISU will not be shown on TH1010D model unless ISU 200 is not set to 5 (cool only). |
| 1400 | Backlighting | 0 = On Demand 1 = Continuous Note: Common wire needed for continuous. This ISU will not be shown if the device is powered only by battery. |
| 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. |
Temperature Ranges
Operating Ambient Temperature
Shipping Temperature
Operating Relative Humidity
Physical Dimensions in inches (mm) (H x W x 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 |
| 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 (TH1110D only) | 20-30 Vac | 0.02-0.5 A |
EQUIPMENT DAMAGE HAZARD
Compressor protection is bypassed during testing. To prevent equipment damage, avoid cycling the compressor quickly.
ELECTRICAL HAZARD
Can cause electrical shock or equipment damage. Disconnect power before beginning installation.
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
Automation and Control Solutions
Download Manual:
Honeywell T1 Pro Non-Programmable Thermostat Installation Instructions
Other Manual:
Honeywell T1 Pro Non-Programmable Thermostat User Guide
Honeywell T1 Pro Non-Programmable Thermostat Installation Instructions
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