Wiring 24 Vac Common; Selecting Discharge Air Temperature Sensor Mounting; Mounting Locations; Locations - Honeywell TH8321 Product Data

VISIONPRO® 8000 SMART THERMOSTAT
INSTALLATION
Model Numbering
Stages
Residential or Commercial
Powered - C Wire (C-wire adapter
compatible)
Onboard Humidity Sensor
Number of IAQ Relays
Number of Sensor Inputs
Economizer / TOD Output

Wiring 24 Vac Common

• Single-Transformer System—Connect the common side
of the transformer to the C screw terminal of the
thermostat. Leave the metal jumper wires in place
between R and RC.
• Two-Transformer System—Connect the common side of
the cooling transformer to the C screw terminal of the
thermostat. Remove the metal jumper wire between R
and RC. Connect the hot side of heating transformer to
R and connect the hot side of cooling transformer to RC.
Selecting Discharge Air
Temperature Sensor Mounting

Locations

Refer to the guidelines below and Fig. 3–7 for mounting
locations of the Discharge Air Temperature Sensor.
Selecting Discharge Air Temperature
Sensor Mounting Location
1. Mount the Discharge Air Temperature Sensor on the
supply duct in a location where the air is mixed well.
Mount the Discharge Air Temperature Sensor out of
sight of the A-Coil/Heat Exchanger when possible.
See Fig. 3.
2. When possible, mount the Discharge Air Temperature
Sensor upstream of a Steam Humidifier, a Fan
Powered Humidifier or a Dehumidifier that is ducted
to the supply. See Fig. 4–5.
3. If space does not allow a Discharge Air Temperature
Sensor upstream of a Steam Humidifier or Fan
Powered Humidifier, mount the Discharge Air
Temperature Sensor downstream of the Humidifier.
See Fig. 4.
4. If a Bypass Humidifier is installed, mount the
Discharge Air Temperature Sensor downstream of the
Bypass Humidifier. See Fig. 6–7.
33-00096—04
Selecting Discharge Air Temperature
Sensor Mounting Location
1. Install the Discharge Air Temperature Sensor on the
duct in a location where the air is mixed well. See
TH8321
Fig. 3–7.
3H/2C HP
2H/2C CONV



1
1

DEHUMIDIFIER
DEHUMIDIFIER
6
MOUNT DISCHARGE
SENSOR HERE
VENTILATOR
OR
Fig. 3.
ALTERNATE MOUNTING LOCATION
FOR DISCHARGE SENSOR.
VENTILATOR
OR
Fig. 4.
A-COIL
HEAT
EXCHANGER
BLOWER
M35768
HUMIDIFIER
MOUNT
DISCHARGE
SENSOR HERE
ABOVE
CENTER
OF A-COIL
HEAT
UPSTREAM OF
EXCHANGER
HUMIDIFIER
BLOWER
M35769