Honeywell TH8320R1003 Installation Manual

About Honeywell Thermostat Manual TH8320R1003

Honeywell TH8320R1003 Product Data


  • RedLINK™ Compatible - Increase your content and profit per job by including RedLINK™ accessories that meet your customers comfort and convenience needs. RedLINK accessories include the Wireless Outdoor Sensor, Portable Comfort Control (PCC), Equipment Interface Module (EIM), RedLINK Internet Gateway, Wireless Indoor Sensor, TrueSTEAM™ humidifier with Wireless Adapter, TrueZONE™ zoning panel with Wireless Adapter, Vent Boost Remote and Entry/Exit Remote.
  • Customizable Service Reminders - Set up to 10 service reminders. Choose from the pre-set options or customize your own. Reminders can be basedon date or the outdoor temperature.
  • Universal InputsThermostat - S1EIM - S1, S2, S3, S4Assignable inputs allow you to setup Indoor and OutdoorTemperature Sensors, Discharge and Return Air Sensorsor Dry Contact Devices. Dry Contact Devices can be usedto trip pre-set or customized alerts on the thermostat home screen. Note: Dry Contact Alerts require an Equipment Interface Module (EIM).
  • User Interaction Log - The interaction log stores history of thermostat setting changes including temperature, system and installer setup. You can use the interaction log to save time by determining if the issue is a system error or an accidental user error. The Interaction Log is only viewable on a computer after you download it from the thermostat to a microSD card.
  • Selectable for Residential and Light Commercial - One thermostat does it all to meet the needs of Residential and Light Commercial applications. Simply select Residen- tial or Commercial during the installer setup. If Commercial is selected, the thermostat will use commercial language, meet building codes and offer 365 day holiday scheduling.
  • MicroSD Card Port for Quick Installer Setup - Save time by using a microSD card to upload installer settings and service reminders in one simple step.
  • Selectable Sensors - When paired with a Wireless Indoor Sensor(s) you have the ability to choose which sensor(s) to use for tempera- ture, humidification and dehumidification. They can be used in combination for temperature averaging or individually to condition humidity levels in separate spaces.

Honeywell TH8320R1003 Application

The VisionPRO® 8000 with RedLINK™ features an effortless, 7-Day programmable touchscreen thermostat that provides control of temperature, humidification, dehumidification, and ventilation for up to 4 Heat/2 Cool heat pump systems or up to 3 Heat/2 Cool conventional systems for residential and commercial applications.




Powering method

 Common wire or battery

System types (up to 4 heat/2 cool heat pump and up to 3 heat/2 cool conventional)

  • Gas, oil or electric heat with air
  • Warm air, hot water, high-efficiency
    furnaces, heat pumps, steam and
  • Cool only


Manual or Auto changeover selectable

System setting

Em Heat-Heat-Off-Cool-Auto

Fan setting

Auto-On-Circ-Follow Schedule

Electrical Ratings for: the Equipment Interface Module and

VisionPRO Thermostats
NOTE: To find what terminals are available on the Equipment Interface Module and the VisionPRO Thermostats, see "Terminal Designations" below the table. 


Voltage (50/60 Hz)

Max. Current Rating

W - O/B

18 to 30 VAC and

750 mVDC


Y (cooling)

18 to 30 VAC


G (fan)

18 to 30 VAC


W2 - Aux 1 (heating)

18 to 30 VAC


W3 - Aux 2 (heating)

18 to 30 VAC


Y2 (cooling)

18 to 30 VAC


A-L/A (Output)

18 to 30 VAC


U1, U1 U2, U2 U3, U3

30 VAC max.


Terminal Designations:

  • Equipment Interface Module: R, RC, RH, C, W-O/B, W2-AUX 1, W3-AUX 2, Y, Y2, G, A-L/A, U1 U1, U2 U2, U3 U3, S1 S1, S2 S2, S3 S3, S4 S4, A, B, C, D
  • TH8321 Thermostat: R, RC, C, W-O/B, W2-AUX/E, Y, Y2,G, A-L/A, K, U1 U1, S1 S1
  • TH8320 Thermostat: R, RC, C, W-O/B, W2-AUX/E, Y, Y2, G, A-L/A, K, S1 S1
  • TH8110 Thermostat: R, RC, C, W-O/B, Y, G, K, S1 S1

Power Consumption of TH8321/TH8320/TH8110:

  • Backlight on: 1.44 VA
  • Backlight off: 1.32 VA

RedLINK Communication:

  • Frequency: 900 Mhz frequency range
  • Re-Sync Time: RedLINK devices re-establish communication within 6 minutes after AC power resumes.

Temperature Setting Range:

  • Heating: 40 to 90 °F (4.5 to 32 °C).
  • Cooling: 50 to 99 °F (10 to 37 °C).

Temperature Sensor Accuracy:

± 1.5 F at 70 F (0.75 C at 21.0 C) 

Humidification Setting Range:
10% to 60% RH.

Dehumidification Setting Range:
40% to 80% RH.

Humidity Display Range:
0% to 99%.

Humidity Sensor Accuracy:
± 5% RH from 30% to 50% RH at 75 F.

Cool Indication:
VisionPRO® 8000 with RedLINK™ displays “Cool On” when the thermostat turns the cooling on.

Heat Indication:
VisionPRO® 8000 with RedLINK™ displays “Heat On” when the thermostat turns the heating on.

Auxiliary Heat Indication:
VisionPRO® 8000 with RedLINK™ displays “Aux Heat On”  when the thermostat turns the auxiliary heat on.

Interstage Differential:
Comfort: The thermostat keeps the indoor temperature within 1degree of the setpoint (droop less control). The thermostat turns on stage 2 when the capacity on stage 1 reaches 90%. When the interstage differential is set to 1.0 or higher, the thermostat stages the equipment based on how far the indoor temperature is from the setpoint (ISU 303 to 309). See page 27 for more information.

Clock Accuracy:
1 minute per month at 77 °F (25 °C). ± 2 minutes per month over the operating ambient temperature range.

Mounting Means:
Thermostat mounts directly on the wall in the living space using mounting screws and anchors provided. Fits a horizontal 2 x 4 in. junction box. Equipment Interface Module (EIM) mounts on HVAC equipment or on a wall in the equipment room.

Honeywell TH8320R1003 Troubleshooting



Screen is blank

  • Check circuit breaker and reset if necessary.
  • Make sure power switch at heating and cooling system is on.
  • Make sure furnace door is closed securely.
  • If thermostat is battery powered, make sure fresh AA alkaline batteries are installed correctly

Screen is difficult to read

  • Change screen brightness using Preferences menu.

Red light is on

  • If thermostat is in Emergency Heat mode, the red light is normal. It shows that the thermostat is inEmergencyHeat mode.
  • If thermostat is not in Emergency Heat mode, an alert is active. Check message on the thermostat screen.

Heating or cooling system does not respond

  • Touch SYSTEM to set system to Heat. Make sure the temperature is set higher than the Inside temperature.<o :p></o>

  • Touch SYSTEM to set system to Cool. Make sure the temperature is set lower than the Inside temperature

  • Check circuit breaker and reset if necessary.<o :p></o>

  • Make sure power switch at heating & cooling system is on.<o :p></o>

  • Make sure furnace door is closed securely.<o :p></o>

    If “Wait” is displayed, the compressor protection timer is on. Wait 5 minutes for the system to restart safely, without damaging the compressor.

Readmore and Download Honeywell Thermostat Manual TH8320R1003

Title : Honeywell Thermostat Manual TH8320R1003
Format : PDF
Pages : 140 Pages
Language : English
File Size : 24 MB

Honeywell TH8320R1003 Installation Manual

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