Honeywell TH8320ZW Touch-screen Thermostat Installation Guide

: June 5, 2024
: Honeywell

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

[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)

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.