Installation guide

VisionPRO
®
TH8110 / TH8320 / TH8321
11
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.)
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 thermo-
stat 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 oper-
ates. 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 temper-
ature 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.