Honeywell TH8000 Series Touch-screen Programmable Thermostat Installation Guide

: June 6, 2024
: Honeywell

Table of Contents

This manual covers the following models
System Types
Wallplate installation
Power options
Wiring
Wiring guide—conventional systems
Wiring guide—heat pump systems
Remove tab and mount thermostat
Set date and time
Installer setup
Setup function
Installer system test
Special functions
Specifications
Need Help?
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

**Honeywell TH8000 Series Touch-screen Programmable Thermostat Installation Guide

**

Note: This document is for obsolete models. Current VisionPRO models start with TH8110R, TH8320R, TH8321R, or TH8321WF.

This manual covers the following models

TH8110U: For 1 Heat/1 Cool systems
TH8320U: For up to 3 Heat/2 Cool systems
TH8321U: For up to 3 Heat/2 Cool systems with dehumidification
(Pull thermostat from wallplate and turn over to find model number)

System Types

Gas, oil, or electric heat with air conditioning
Warm air, hot water, highefficiency furnaces, heat pumps, steam, gravity
Heat only — two-wire systems, power to open and close zone valves (Series 20), and normally open zone valves
Heat only with fan
Cool only
750 mV heating 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

Wallplate installation

Separate wallplate from thermostat.
Mount 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.

CAUTION: 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.

Power options

Power Option

Wiring

Wiring Instruction

Terminal Designations Shaded areas below apply only to TH8320/TH8321.

Conventional Terminal Letters:

R Heating power. Connect to 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 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 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.

1H/ 1C System (1 transformer)	1H/1C System (2 transformers)
Rc	Power [1]
R	[R+Rc joined by jumper]
W	Heat relay
Y	Compressor contactor
G	Fan relay
S1	Optional outdoor/remote sensor

sensor
S2| Optional outdoor/remote sensor| S2| Optional outdoor/remote sensor

Heat Only System

Heat Only System With Fan

Heat Only System (Series 20)

Cool Only System

2H/2C System (1 transformer)

2H/2C System (2 transformers)

See [notes] below

Power supply. Provide disconnect means and overload protection as required.
Remove jumper for 2-transformer systems.
Optional 24VAC common connection.
Common connection must come from cooling transformer.

Wiring guide—heat pump systems

Shaded areas below apply only to TH8320/TH8321.

1H/1C Heat Pump (no auxiliary heat)

2H/2C Heat Pump (no auxiliary heat)

2H/1C Heat Pump (with auxiliary heat)

3H/2C Heat Pump (with auxiliary heat)

See [notes] below

Power supply. Provide disconnect means and overload protection as required.
Optional 24VAC common connection.
O/B set to control as either O or B in installer setup.
If L terminal is used, 24VAC common (terminal C) must be connected.
Heat pump reset (powered continuously when thermostat is set to Em. Heat; system monitor when set to Heat, Cool, or Off).

Remove tab and mount thermostat

Mounting Instruction

Align pins on back of thermostat with slots in wallplate, then push gently until thermostat snaps into place.

Set date and time

Installer setup

Setup function

Settings & Options (factory default in bold)

Shaded areas below apply only to TH8320/TH8321.

0120| Year
(first two digits)| 20 ( 20 01- 20 99)

21 ( 21 00- 21 78)

---|---|---
0130| Year
(second two digits)| 12 (20 12 )
[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 heat/1 cool conventional
1 heat/1 cool heat pump (no aux. heat)
Heat only (2-wire systems)
Heat only with fan
Hot water Series 20 system (power to open & close zone valves/normally open zone valves)
Cool only
2 heat/1 cool heat pump (with aux. heat)
2 heat/2 cool multistage conventional
2 heat/1 cool multistage conventional
1 heat/2 cool multistage conventional
2 heat/2 cool heat pump (no aux. heat)
3 heat/2 cool heat pump (with aux. heat)

0180| Fan control (heating)| 0 Gas/Oil heat (equipment controls heating fan)
1 Electric furnace (thermostat controls 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 re- quired)
0220| 1st stage com- pressor cycle rate| 3 Recommended for most compressors
[Other options: 1, 2, 4, 5 or 6 CPH]
0230| 2nd stage com- pressor 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 M anual 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) 1
[Other options: 2-9 (2°F to 9°F/1.5 °C to 5°C)]
0320| Temperature display| 0 F ahrenheit
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)
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

Settings & Options (factory default in bold)

0500| Furnace filter change reminder| 0 Off
1 10-day run time (about 1 month)
2 30-day run time (about 3 months)
3 60-day run time (about 6 months)
4 90-day run time (about 9 months)
5 120-day run time (about 1 year)
6 365-day run time (about 3 years)
---|---|---
0510| Humidifier pad change
reminder| 0 Off
1 90 calendar days
2 180 calendar days
3 365 calendar days
0520| UV lamp change reminder| 0 Off
1 365 calendar days
0530| Adaptive Intelligent Recovery™| 1 On
0 Off
0540| Program periods| 4 4 program periods (Wake, Leave, Return, Sleep)
2 2 program periods (Wake, Sleep)
0580| Compressor protection| 5 5 minute compressor off time
[Other options: 0, 1, 2, 3 or 4-minute off time]
0600| Heat temperature range stop| 90 Max. heat temperature setting is 90°F (32°C)
[Other options: 40-89°F (4.5°C to 32°C)]
0610| Cool temperature range stop| 50 Min. cool temperature setting is 50°F (10°C)
[Other options: 51-99°F (10.5°C to 37°C)]
0640| Clock format| 12 12-hour time (i.e., “3:30 pm”)
24 24-hour time (i.e., “15:30”)
0650| Extended fan timer (heat)| 0 Off
90 Fan runs for 90 seconds after call for heat ends
0660| Extended fan timer (cool)| 0 Off
90 Fan runs for 90 seconds after call for cooling ends
0670| Keypad lock| 0 Keypad unlocked (fully functional)
1 Partially locked (access to temperature settings only)
2 Fully locked
0680| Heat temperature control| 2 Standard temperature control (recommended)
1 Choose if room is warmer than set temperature
3 Choose if room does not reach set temperature
0690| Cool temperature control| 2 Standard temperature control (recommended)
1 Choose if room is cooler than set temperature
3 Choose if room does not reach set temperature
0700| Temperature display offset| 0 Thermostat displays actual room temperature
[Other options: -3, -2, -1, 1, 2, 3°F offset (-1.5°C to 1.5°C)
0710| RESET| 0 No reset
1 Reset installer options & program schedule to factory default (only date and time settings are retained)

Installer system test

Installation Instruction

Shaded areas below apply only to TH8320/TH8321.

System test	System status
1 Cooling system	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”)
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

CAUTION: EQUIPMENT DAMAGE HAZARD. Compressor protection is bypassed during testing. To prevent equipment damage, avoid cycling the compressor quickly

Special functions

Shaded areas below apply only to TH8320/TH8321.

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.

Accessories & replacement parts

Please contact your distributor to order replacement parts.
Outdoor temperature sensor. ………………………………Part Number C7089U1006
Remote indoor temperature sensor …………………….Part Number C7189U1005
**Cover plate** …………………………………………………………..Part Number 32003796-001
(Use to cover marks left by old thermostats.)

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

Electrical Ratings

Terminal current	Voltage (50/60Hz)	Running
W Heating	20-30 Vac	0.02-1.0 A
(Powerpile)	750 mV DC	100 mA DC
W2 Heating	20-30 Vac	0.02-0.6 A
Y Cooling	20-30 Vac	0.02-1.0 A
Y2 Cooling	20-30 Vac	0.02-0.6 A
Au x / E Aux. Heat Emergency heat	20-30 Vac	0.02-1.0 A

O/B Changeover| 20-30 Vac| 0.02-0.6 A
L Heat pump reset| 20-30 Vac| 0.02-0.6 A

Need Help?

For assistance with this product please visit http://customer.resideo.com
or call Resideo Customer Care toll-free at 1-800-468-1502

Logo Resideo Technologies, Inc.
1985 Douglas Drive North, Golden Valley, MN 55422
1-800-468-1502
69-2693—03 M.S. Rev. 07-21 | Printed in United States