Honeywell VisionPRO TH8000 Series Programmable Thermostat
Installation Guide
Wallplate installation
- Separate wallplate from thermostat.
- Mount the wallplate as shown below.
- Must be installed by a trained, experienced technician
- Read these instructions carefully. Failure to follow these instructions can damage the product or cause a hazardous condition
Power options
Wiring
Terminal Designations
Conventional Terminal Letters:
- R Heating power. Connect to the secondary side of heating system transformer.
- Rc Cooling power. Connect to secondary side of cooling system transformer.
- C Common wire from secondary side of cooling transformer (if 2 transformers).
- W 1st stage heat relay.
- W2 2nd stage heat relay.
- Y 1st stage compressor contactor.
- Y2 2nd stage compressor contactor.
- G Fan relay.
- S1 Optional outdoor or remote sensor.
- S2 Optional outdoor or remote sensor
Heat Pump Terminal Letters:
- R Heating power. Connect to the secondary side of the heating system transformer.
- RC Cooling power. Connect to the secondary side of the cooling system transformer.
- C Common wire from the secondary side of the cooling system transformer.
- Y 1st stage compressor contactor.
- Y2 2nd stage compressor contactor.
- Aux/E Auxiliary/Emergency heat relay.
- G Fan relay.
- L Heat pump reset (powered continuously when System is set to Em Heat; system monitor when set to Heat, Cool or Off).
- O/B Changeover valve for heat pumps.
- S1 Optional outdoor or remote sensor.
- S2 Optional outdoor or remote sensor.
Wiring guide—conventional systems
Shaded areas below apply only to TH8320/TH8321.
Wiring guide—heat pump systems
Shaded areas below apply only to TH8320/TH8321
See [notes] below
- [1] Power supply. Provide disconnect means and overload protection as required.
- [3] Optional 24VAC common connection.
- [5] O/B is set to control as either O or B in the installer setup.
- [6] If the L terminal is used, the 24VAC common terminal (terminal C) must be connected.
- [7] The heat pump resets (powered continuously when the thermostat is set to Em. Heat; the system monitors when set to Heat, Cool, or Off).
Remove the tab and mount the thermostat
- Align pins on the back of the thermostat with slots in the wallplate, then push gently until thermostat snaps into place
Set date and time
Installer setup
- Change settings as required (see pages 7-9).
| 0120 | Year (first two digits) | 20 (2001-2099) 21 (2100-2178) |
| 0130 | Year (second two digits) | 12 (2012) [Other options: 00-99] |
| 0140 | Month | 6 [Other options: 1-12] |
| 0150 | Date | 15 [Other options: 1-31] |
| 0160 | Schedule format | 4 7-day programming 0 Non-programmable |
| 0170 | System type | 1 1 heat/1 cool conventional 2 1 heat/1 cool heat pump (no aux. heat) 3 Heat only (2-wire systems) 4 Heat only with fan 5 Hot water Series 20 system (power to open & close zone valves/normally open zone valves) 6 Cool only 7 2 heat/1 cool heat pump (with aux. heat) 8 2 heat/2 cool multistage conventional 9 2 heat/1 cool multistage conventional 10 1 heat/2 cool multistage conventional 11 2 heat/2 cool heat pump (no aux. heat) 12 3 heat/2 cool heat pump (with aux. heat) |
| 0180 | Fan control (heating) | 0 Gas/Oil heat (equipment controls the heating fan) 1 Electric furnace (thermostat controls the heating fan) |
| 0190 | Changeover valve (O/B terminal) | 0 O/B terminal controls valve in cooling 1 O/B terminal controls valve in heating |
| 0200 | Auxiliary heat | 0 Electric backup heat 1 Fossil fuel backup heat |
| 0210 | External fossil fuel kit | 1 External fossil fuel kit controls backup heat 0 Thermostat controls backup heat (outdoor sensor required) |
| 0220 | 1st stage compressor cycle rate | 3 Recommended for most compressors [Other options: 1, 2, 4, 5, or 6 CPH] |
| 0230 | 2nd stage compressor cycle rate | 3 Recommended for most compressors [Other options: 1, 2, 4, 5, or 6 CPH] |
| 0240 | First stage heat cycle rate (CPH= cycles per hour) | 5 Gas or oil furnaces of less than 90% efficiency 1 Steam or gravity systems 3 Hot water systems & furnaces of 90%+ efficiency 9 Electric furnaces [Other options: 2, 4, 6, 7, 8, 10, 11, 12 CPH] |
| 0250 | Second stage heat cycle rate (CPH) | 5 Gas or oil furnaces of less than 90% efficiency 1 Steam or gravity systems 3 Hot water systems & furnaces of 90%+ efficiency 9 Electric furnaces [Other options: 2, 4, 6, 7, 8, 10, 11, 12 CPH] |
| 0260 | Third stage heat cycle rate (CPH) | 9 Electric auxiliary heat or electric furnaces 1 Steam or gravity systems 3 Hot water systems & furnaces of 90%+ efficiency 5 Gas or oil furnaces of less than 90% efficiency [Other options: 2, 4, 6, 7, 8, 10, 11, 12 CPH] |
| 0280 | Backlight | 0 Backlight on for approx. 8 seconds after keypress 1 Backlight always on low intensity, full bright after key- press (requires 24VAC connection) |
| 0300 | Manual/Auto changeover | 0 Manual changeover (Heat/Cool/Off) 1 Automatic changeover (Heat/Cool/Auto/Off) |
| 0310 | Auto changeover deadband | 3 Heat/cool temperature 3°F apart (1.5°C) ** See page 11 [Other options: 2-9 (2°F to 9°F/1.5 °C to 5°C)] |
| 0320 | Temperature display | 0 Fahrenheit 1 Celsius |
| 0330 | Daylight savings | 2 Auto-change to daylight savings time (2007 and be- yond, for areas that use the new 2007 DST calendar) 1 Auto-change to daylight savings time (through 2006, and for areas that do not use the new 2007 DST calendar) 0 Daylight savings time is turned off |
| 0340 | Remote sensor | 0 No remote sensor 1 Outdoor sensor (display only) 2 Outdoor control sensor (select heat pumps) ** See page 11 3 Indoor sensor |
| 0350 | Heat pump compressor lockout | 0 No heat pump compressor lockout [Other options: 15, 20, 25, 30, 35, 40°F (-9.5°C to 7°C)] |
| 0360 | Heat pump auxiliary lockout | 0 No heat pump auxiliary lockout [Other options: 40, 45, 50, 55, 60°F (4.5°C to 15.5°C)] |
| 0380 | Dehumidification control | 0 No dehumidification control 1 Thermostat controls dehumidification with air conditioner ** See page 11 |
Installer system test
- During the installer setup, press t repeatedly until “Test” appears.
Shaded areas below apply only to TH8320/TH8321.
| 1 | System test
Cooling system | System status 0 Compressor and fan turn off 1 Compressor and fan turn on 2 Second stage compressor turns on |
| 2 | Fan system | 0 Fan turns off 1 Fan turns on |
| 3 | Heating system | 0 Heat and fan turn off 1 Heat turns on (fan on if Function 0170 is set for heat pump, or if Function 0180 is set to “1”) ** See page 6 2 Second stage heat turns on 3 Third stage heat turns on |
| 4 | Emergency heating system | 0 Heat and fan turn off 1 Heat and fan turn on |
Special functions
- Auto Changeover (Setup Function 0300): When set to Auto, the thermostat automatically selects heating or cooling depending on the indoor temperature. Heat and cool settings must be at least 2 degrees apart. If function 0380 is set to On, the heat and cool settings must be at least 5 degrees apart.
Remote Sensor (Setup Function 0340): If an optional outdoor sensor is installed, the thermostat can display the outside temperature. If an optional remote indoor sensor is installed, the thermostat will display the temperature at the sensor location (the internal sensor in the thermostat is not used). - Adaptive Intelligent Recovery (Setup Function 0530): Allows the thermostat to “learn” how long the furnace and air conditioner take to reach programmed temperature settings, so the temperature is reached at the scheduled time.
- Compressor Protection (Setup Function 0580): Forces the compressor to wait a few minutes before restarting, to prevent damage. During this time, the message “Wait” flashes on the display.
- Dehumidification control (Setup Function 0380): TH8321 models monitor the indoor humidity level and automatically activate the cooling system to reduce humidity by lowering the temperature by up to 3 degrees below the current cool setting.
- Heat Pump Temperature Lockout (with fossil fuel backup): If the thermostat is installed with an optional outdoor sensor, you can select a compressor lockout temperature (Function 0350). When the outdoor temperature is below the lockout temperature, only the auxiliary heat operates. When the outdoor temperature is above the lockout temperature, only the compressor operates.
- Heat Pump Temperature Lockouts (with electric heat backup): If the thermostat is installed with an optional outdoor sensor, you can select a compressor lockout temperature (Function 0350) and/or an auxiliary heat lockout temperature (Function 0360). When the outdoor temperature is below the compressor lockout temperature, only the auxiliary heat operates. When the outdoor temperature is above the auxiliary lockout temperature, only the compressor operates. If the outdoor temperature is between the compressor and auxiliary lockout temperatures, both the compressor and auxiliary heat can operate.
Specifications
Temperature Ranges
- Heat: 40° to 90°F (4.5° to 32°C)
- Cool: 50° to 99°F (10° to 37°C) Operating Ambient Temperature
- 0° to 120°F (-18° to 48.9°C) Shipping Temperature
- 30° to 150°F (-34° to 66°C) Operating Relative Humidity
- 5% to 90% (non-condensing) Physical Dimensions
- 4-9/16” H x 6” W x 1-3/8” D
- 116 mm H x 152 mm W x 35 mm D
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Honeywell VisionPRO TH8000 Series Programmable Thermostat-FAQs
How do I calibrate my Honeywell VisionPRO 8000 thermostat?
The thermostat is factory-calibrated and does not require manual calibration.
How can I access the installer setup menu?
Press and hold the “Menu” button for five seconds until “ISU” appears, then press “Select” to enter the setup menu.
How does a programmable thermostat work?
It allows users to set heating and cooling schedules. When in “Auto” mode, the thermostat adjusts the temperature based on the programmed settings.
What does the Honeywell VisionPRO 8000 control?
It monitors room temperature and adjusts heating and cooling accordingly, optimizing comfort and energy efficiency.
Can this thermostat control humidity?
Yes, it supports humidification control with a range of 10% to 60% RH.
Does the thermostat require batteries?
Some models use batteries, while others draw power from the HVAC system. It’s recommended to replace thermostat batteries annually.
What does “cycles per hour” mean on a thermostat?
This setting determines how frequently the system turns on and off to maintain the set temperature.
How many cycles per hour does the VisionPRO 8000 support?
It allows 1-12 cycles per hour for heating and 1-6 cycles per hour for cooling.
How is my thermostat powered?
It is powered by red Rc and Rh wires—Rc for cooling and Rh for heating—though they are not interchangeable.