Honeywell TH8320WF User Manual

About Honeywell TH8320WF User Manual

System SetupVisionPRO Wi-Fi Programmable Thermostat Model TH8320WF

  • This thermostat works on 24 volt systems. It will NOT work on 120/240 volt systems.
  • This thermostat contains a Lithium battery which may contain Perchlorate material. Perchlorate Material—special handling may apply. See www.dtsc.ca.gov/hazardouswaste/perchlorate
  • MERCURY NOTICE: Do not place your old thermostat in the trash if it contains mercury in a sealed tube. Contact the Thermostat Recycling Corporation at www. thermostat-recycle.org or 1-800-238-8192 for information on how and where to properly and safely dispose of your old thermostat.
  • NOTICE: To avoid possible compressor damage, do not run air conditioner if the outside temperature drops below 50°F (10°C).

Honeywell TH8320WF Table of Contents

Wiring.......................................................................2
Setting Functions and Options....................................3
System Setup...........................................................3
Installer System Test.................................................7
Troubleshooting.........................................................8

Honeywell TH8320WF WIring

Honeywell TH8320WF WIring

Honeywell TH8320WF Terminal Designations

Conventional Terminal Letters:
Y2 2nd stage compressor contactor.
W2 2nd stage heat relay.
K Optional wirer save module.
S1 Optional outdoor or remote sensor.
S2 Optional outdoor or remote sensor.
Rc Cooling power. Connect to secondary side of cooling system transformer.
R Heating power. Connect to secondary side of heating system transformer.
W 1st stage heat relay.
Y 1st stage compressor contactor.
G Fan relay.
C Common wire from secondary side of cooling transformer (if 2 transformers).

Heat Pump Terminal Letters:
Y2 2nd stage compressor contactor.
L Heat pump reset (powered continuously when System is set to Em Heat; system monitor when set to Heat, Cool or Off).
E/Aux Auxiliary/Emergency heat relay.
K Optional wirer save module.
S1 Optional outdoor or remote sensor.
S2 Optional outdoor or remote sensor.
Rc Cooling power. Connect to secondary side of cooling system transformer.
R Heating power. Connect to secondary side of heating system transformer.
O/B Changeover valve for heat pumps.
Y 1st stage compressor contactor.
G Fan relay.
C Common wire from secondary side of cooling system transformer.

Honeywell TH8320WF Setting functions and options

You can change options for a number of system functions. Available functions depend on the type of system you have. The functions, designated with four-digit numbers, along with available options are described on pages 3–6 This thermostat is pre-set for a single-stage heating/cooling system. Setting function 0170 for a heat pump will adjust the default settings.

  1. Press SYSTEM.
  2. Press and hold the two blank keys on either side of the center blank key for approximately five seconds until screen changes.
  3. Cycle through the functions, press st next to the four digit number on the left.
  4. As needed, change options for any function by pressing st next to the number on the right.
  5. When you have made all changes, press DONE to save and exit.

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Honeywell TH8320WF User Manual