Honeywell TH8320ZW Touch-screen Thermostat Installation Guide
- June 5, 2024
- Honeywell
Table of Contents
- Honeywell TH8320ZW Touch-screen Thermostat
- System Types
- Wallplate installation
- Must be installed by a trained, experienced technician
- Power Requirements
- Wiring
- Wiring
- Heat Pump Terminal Letters:
- Wiring guide—conventional systems
- Wiring
- Mount thermostat
- Set date and time
- Installer setup
- Z-Wave enrollment
- Z-Wave messages
- Special functions
- Accessories & replacement parts
- Specifications
- Optional THP9045 Wiring Module
- Regulatory information
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
Honeywell TH8320ZW Touch-screen Thermostat
This is a legacy product document supported by Resideo. It is no longer manufactured Touch-screen Thermostat.
System Types
- Gas, oil, or electric heat with air conditioning
- Warm air, hot water, high-efficiency furnaces, heat pumps, steam, gravity
- Heat only — including the 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.
- Grasp top and bottom of wallplate and pull to remove from the thermostat.
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 Requirements
Connect the common side of the transformer to “C” terminal. This connection is mandatory. The thermostat is shipped from the factory with the coin cell installed. To keep the bat-tery from discharging during shipment and storage, the thermostat is shipped with a plastic tab inserted in the battery holder. This tab must be removed during installa-tion. Simply pull the plastic tab out of the battery tray. Make sure that the battery tray is fully inserted into the thermostat.
Wiring
Remove factory-installed jumper only for two-transformer systems. Push excess wire back into the wall opening. Plug wall opening with non-flammable insulation.
Wiring
Terminal Designations
Conventional Terminal Letters:
- Heating power. Connect to the secondary side of heating system transformer.
- Cooling power. Connect to the secondary side of cooling system transformer.
- The common wire from the secondary side of cooling transformer (if 2 transformers).
- 1st stage heat relay.
- 2nd stage heat relay
- 1st stage compressor contactor.
- 2nd stage compressor contactor.
- Fan relay.
- Optional THP9045 Wiring Module
- Terminal [9]
Heat Pump Terminal Letters:
- Heating power. Connect to secondary side of heating system transformer.
- Cooling power. Connect to secondary side of cooling system transformer.
- Common wire from secondary side of cooling system transformer.
- 1st stage compressor contactor.
- 2nd stage compressor contactor.
- Aux Auxiliary heat relay.
- Fan relay.
- Emergency heat relay.
- 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.
- Optional THP9045 Wiring Module
- Terminal [9]
Wiring guide—conventional systems
1H/1C System (1 transformer)
- Power [1]
- [R+Rc joined by jumper]
- Heat relay
- Compressor contactor
- Fan relay
- 24VAC common [3]
- Optional THP9045 Wiring Module
- terminal [9]
- eat Only System
- c Power [1]
- [R+Rc joined by jumper]
- Heat relay
- 24VAC common [3]
Heat Only System (Series 20)
- [R+Rc joined by jumper]
- Series 20 valve terminal “R” [1]
- Series 20 valve terminal “B”
- Series 20 valve terminal “W”
- 24VAC common [3]
- 2H/2C System (1 transformer)
- Y2 Cool relay 2
- W2 Heat relay 2
- Rc Power [1]
- [R+Rc joined by jumper]
- Heat relay 1
- Cool relay 1
- Fan relay
- 24VAC common [3]
- Optional THP9045 Wiring Module
- Terminal [9]
See [notes] below
- [1] Power supply. Provide disconnect means and overload protection as required.
- [3] Connection to 24VAC common at the transformer is required.
- [9] See “Optional THP9045 Wiring Module” on page 14 for more details
Wiring
- Power [1]
- [R+Rc joined by jumper]
- O/B Changeover valve [5]
- Compressor relay
- Fan relay
- 24VAC common [3]
- Optional THP9045 Wiring Module
- terminal [9]
1H/1C System (2 transformers)
- Power (cooling transformer) [1, 2]
- Power (heating transformer) [1, 2]
- Heat relay
- Compressor contactor
- Fan relay
- 24VAC common [3, 4]
- Optional THP9045 Wiring Module
- Terminal [9]
2H/1C Heat Pump (with auxiliary heat)
- Equipment monitor [6, 7]
- Emergency heat relay [8]
- aux Auxiliary heat relay (Heat 2) [8]
- Rc Power [1]
- [R+Rc joined by jumper]
- O/B Changeover valve [5]
- Compressor relay
- Fan relay
- 24VAC common [3]
- Optional THP9045 Wiring Module
- Terminal [9]
Heat Only System With Fan
- Power [1]
- [R+Rc joined by jumper]
- Heat relay
- Fan relay
- 24VAC common [3]
- Cool Only System
- Power [1]
- [R+Rc joined by jumper]
- Compressor contactor
- Fan relay
- 24VAC common [3]
- Optional THP9045 Wiring Module
- Terminal [9]
See [notes] below
- Power supply. Provide disconnect means and overload protection as required.
- Remove jumper for 2 transformer systems.
- Connection to 24VAC common at the transformer is required.
- Common connection must come from cooling transformer.
- O/B set to control as either O or B in installer setup.
- 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).
- Install field jumper between Aux and E terminals if there is no emergency heat relay.
- See “Optional THP9045 Wiring Module” on page 14 for more details.
Mount thermostat
Align pins on back of thermostat with slots in wallplate, then push gently until thermostat snaps into place.
Set date and time
Installer setup
- Press SYSTEM.
- Press and hold these two buttons until the display changes.
- Change settings as required (see pages 7-9).
0120 | Year | 20 | ( 20 00- 20 78) |
---|---|---|---|
(first two digits) | 21 | ( 21 01- 21 78) | |
0130 | Year |
(second two digits)
| 10| (20 10 ) [Other options: 00-99]
0140| Month| 6| [Other options: 1-12]
0150| Date| 15| [Other options: 1-31]
0160| Schedule format| 0| Nonprogrammable
| | 4| Programmable
0165| Restore Energy| 0| No
| Saving Schedule| 1| Yes
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| 0| Gas/Oil heat (equipment controls
heating fan)
| (heating)| 1| Electric furnace (thermostat controls heating fan)
0190| Changeover valve| 0| O terminal controls valve in
cooling
| (O/B terminal)| 1| B terminal controls valve in heating
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]
0250 | 2nd stage heat | 9 | Electric furnaces |
---|---|---|---|
cycle rate (CPH) | 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] | |||
0260 | 3rd stage heat cycle | 9 | Electric furnaces |
rate (CPH) | 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] | |||
0270 | Emergency heat | 9 | Electric emergency heat |
cycle rate (CPH) | 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 | Continuous | 0 | **Backlight on for approx. 45 seconds |
after keypress
| Backlight| 1| Backlight always on low intensity, full bright after
keypress
| | | (requires 24VAC connection)
0300| Manual/Auto| 0| Manual changeover (Heat/Cool/Off)
| changeover| 1| Automatic changeover (Heat/Cool/Auto/Off)
0310| Auto changeover deadband| 3| Heat/cool temperature 3°F
apart (1.5°C)**
[Other options: 2-9 (2°F to 9°F/1°C to 5°C)])
0320| Temperature| 0| Fahrenheit
| display| 1| Celsius
0330| Daylight savings| 1| Auto-change to daylight savings
time (through 2007, and for
| | | areas that do not use the new 2008 DST calendar)
| | 0| Daylight savings time is turned off
0500| Furnace filter| 0| Off
| change reminder| 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| 180-day run time (about 1.5 years)
| | 7| 270-day run time (about 2 years)
| | 8| 365-day run time (about 3 years)
| | 9| 30 calendar days
| | 10| 60 calendar days
| | 11| 90 calendar days
| | 12| 120 calendar days
| | 13| 180 calendar days
| | 14| 365 calendar days
0502| Furnace filter| 0| Counts both heat and cool
| for Run time| 1| Counts cool only
0520| UV Lamp| 0| Disabled
| Replacement| 1| 365 days
| Reminder| 2| 730 days
0530| Adaptive Intelligent| 1| On
| Recovery™| 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°C to 32°C)]
0610| Cool temperature range stop| 50| Min. cool temperature
setting is 50°F (10°C) [Other options: 51-99°F (11°C to 37°C)]
0615| Energy Saving Heat Setpoint| 65| 65°F (18.5°C)
40-90°F (4.5°C to 32°C)
0616| Energy Saving Cooling Setpoint| 78| 78°F (25.5°C)
50-99°F (10°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| 0| Off
| timer (heat)| 90| Fan runs for 90 seconds after call for heat ends
| | | [Other options: 30, 60, 120]
0660| Extended fan| 0| Off
| timer (cool)| 90| Fan runs for 90 seconds after call for cooling ends
| | | [Other options: 30, 60, 120]
0670| Keypad lock| 0| Keypad unlocked (fully functional)
| | 1| Partially locked (access to temperature settings only)
| | 2| Fully locked
0680| Heat temperature| 2| Standard temperature control
(recommended)
| control| 1| Choose if room is warmer than set temperature
| | 3| Choose if room does not reach set temperature
0690| Cool temperature| 2| Standard temperature control
(recommended)
| control| 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, the Z-Wave Radio module, & program-
| | | ming schedule to factory default (only date and time settings
| | | are retained)
rf10| Z-Wave Network| 0| Remove
| Connection| 1| Add
rf20| Z-Wave Node| 0| Idle
| Connection| 1| Send Node
During installer setup, press t repeatedly until “Test” appears.
- Compressor and fan turn off
- Compressor and fan turn on
- Second stage compressor turns on
- Fan turns off
- Fan turns on
- Heat and fan turn off
- Heat turns on (fan on if Function 0170 is set for heat pump, or if Function 0180 is set to “1”)
- Second stage heat turns on
- Em Heat and fan turn off
- Em Heat and fan turn on
- Second stage heat turns on (Auxiliary heat)
CAUTION:
EQUIPMENT DAMAGE HAZARD. Compressor protection is bypassed dur-ing testing.
To prevent equipment damage, avoid cycling the compressor quickly.
Z-Wave enrollment
The TH8320ZW is powered by Z-Wave technology so it is compatible with Z-Wave- enabled devices from other manufacturers.
- To join a Z-Wave network, set the Z- Wave controller to INCLUDE mode.
- Select 1 to add thermostat to Z- Wave network.
- To remove the thermostat from the Z- Wave network select 0.
- To share the thermostat Node information with additional Z-Wave devices select 1.
Z-Wave messages
Add/ Remove
The thermostat can be included or excluded from the Z-Wave network. This
action requires the controller set in inclusion mode. The device is included
to the Z-Wave network after sending the node information to the controller.
The controller is responsible for assigning the home ID and device ID to the
included device. The thermostat can also act as a repeater to forward messages
to other devices in the Z-Wave network. Repeating messages allows
communication of devices that are not in the direct reach of Z-wave protocol.
Association
The thermostat can be associated with other devices in the system. Being
associated means that the thermostat is able to send messages directly to any
other device. During the association pro-cess the return route is acquired
from the primary controller. The thermostat then uses this return route to
access the distant node. The association is a connection between primary and
second-ary devices. It is used to determine the relationship of devices in the
network. Both primary and secondary controllers can set up associations.The
thermostat supports one association grouping and five nodes can be associated
with this grouping. Following messages are sent to associated nodes for
grouping #1:
- Basic
- Multilevel Sensor
- Thermostat Mode
- Thermostat Setpoint
- Thermostat Fan Mode
- Thermostat Operating State
- Thermostat Fan State
Enter/leave Power Saving Mode
When requested from the Z-Wave controller, the thermostat adjusts its setpoint
in order to decrease the power consumption of the HVAC equipment. In addition,
using an Internet gateway enables the person to control the thermostat
remotely through the Internet.
Thermostat Fan Mode Change
The thermostat can send the message containing the actual fan mode position.
Thermostat Fan Mode
The other devices are able to change the fan mode of the thermostat. After the
message is received, the fan mode is changed to the desired value (if this
value is possible). For the thermostat the possible values are On, Auto and
Circ.
Indoor Temperature
The thermostat sends the indoor temperature using the Multilevel Sensor
command class.
Report upon GET request
Upon request (GET command) the thermostat sends the corresponding report.
Setpoint Value
The thermostat can send the message containing the actual setpoint value based
on setpoint change.
Setpoint Change
Other Z-Wave devices are able to modify the setpoint of the thermostat. The
absolute value can be sent by the controller and thermostat will change the
setpoint to this value.
Thermostat Mode Change
The thermostat can send the message containing the actual thermostat mode
based on thermo-stat mode change.
Thermostat Mode
Other devices (controllers) are able to change the thermostat mode change of
the thermostat. After the message is received by the thermostat, the
thermostat mode change is changed to desired value (if this value is
possible).Seven possible modes are available for the thermostat: Heat / Cool /
Off / Auto / Energy Saving Heat / Energy Saving Cool / Em Heat. The number of
allowed selections depends on the actual configuration of the thermostat. The
thermostat uses “Thermostat Mode Supported” report command class to tell other
devices the actually supported thermostat modes.
Thermostat Operating State
The thermostat can send the message containing the actual state of the HVAC
equipment based on equipment state change.
The thermostat provides the following operating states:
- Idle – no equipment on
- Heating – heating equipment on
- Cooling – cooling equipment on
- Pending Heat – minimum off time applied to protect the heat pump compressor
- Pending Cool – minimum off time applied to protect the heat pump compressor
Unsolicited Report Message
Sending the message is possible only if the thermostat is associated with any
other node. The thermostat will send the message using assigned node ID and
return route.
Special functions
Auto Changeover
(Setup Function 0300): When set to Auto, the thermostat automatically selects
heat- ing or cooling depending on the indoor temperature. Heat and cool
settings must be at least 2 degrees apart.
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” is on the display.
Accessories & replacement parts
Please contact your distributor to order replacement parts. Cover plat ……………………………………………………. 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)
- perating 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
- 4-23/25” H x 6-2/5” W x 1-19/46” D
- 125 mm H x 166 mm W x 36 mm 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 W2 Heating 20-30 Vac 0.02-0.6 A
- Cooling 20-30 Vac 0.02-1.0 A Y2 Cooling 20-30 Vac 0.02-0.6 A
- ux Auxiliary heat 20-30 Vac 0.02-1.0 A O/B Changeover 20-30 Vac 0.02-0.6 A
- Emergency heat 20-30 Vac 0.02-1.0 A
- Heat pump reset 20-30 Vac 0.02-0.6 A
Optional THP9045 Wiring Module
The THP9045 Wiring Module is designed to be used with applicable thermostats in 1 Heat/1 Cool retrofit applications where only 4 wires are available. The K terminal on the thermostat can be used to operate both the fan and compressor on a single wire, and the module is designed to receive the signal from the K terminal, split that signal and reroute it to operate the compressor, and/or fan for normal operation. See the THP9045 manual for further details.
Regulatory information
FCC Compliance Statement (Part 15.19) (USA only)
This device complies with Part 15 of the FCC Rules. Operation is subject to
the following two conditions:
- This device may not cause harmful interference, and
- This device must accept any interference received, including interference that may cause undesired operation.
FCC Warning (Part 15.21) (USA only)
Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
FCC Interference Statement (Part 15.105 (b)) (USA only)
This equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate
radio frequency energy and, if not installed and used in accordance with the
instruc-tions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the
interference by one of the following mea-sures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
Section 7.1.2 of RSS-GEN
Under Industry Canada regulations, this radio transmitter may only operate
using an antenna of a type and maximum (or lesser) gain approved for the
transmitter by Industry Canada. To reduce potential radio interference to
other users, the antenna type and its gain should be so chosen that the
equivalent isotropically radiated power (e.i.r.p.) is not more than that
necessary for successful communication.
Section 7.1.3 of RSS-GEN
This Device complies with Industry Canada License-exempt RSS standard(s).
Operation is subject to the following two conditions: 1) this device may not
cause interference, and 2) this device must accept any interference, including
interference that may cause undesired operation of the device.