Honeywell VisionPRO TH8000 Installation Manual

This manual covers the following models

• 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, high efficiency 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

1. Separate wallplate from thermostat.
2. Mount wallplate as shown below.

Drill 3/16" holes for drywall. Drill 7/32" holes for plaster.

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.

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

For 24VAC primary power, connect common side of transformer to "C" terminal.

Insert supplied batteries for primary or backup power.

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.

Terminal Designations

Shaded areas below apply only to TH8320/TH8321.

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.

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

Installer system test

During installer setup, press repeatedly until "Test" appears.



Press to select test | Press to change status
Press DONE to terminate testing.

Shaded areas below apply only to TH8320/TH8321.

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

Need Help?
For assistance with this product please visit http://customer.honeywell.com
or call Honeywell Customer Care toll-free at 1-800-468-1502

Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
http://customer.honeywell.com

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© 2012 Honeywell International Inc.
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