THX9321 PRESTIGE
®
2.0 AND THX9421 PRESTIGE
®
IAQ WITH EIM
68-0311—02
12
Fig. 14.
Installing Discharge and Return Air
Temperature Sensors
Use the following steps to mount the Discharge/Return Air
Sensors:
1.
Attach plastic cover to the sensor probe.
2.
Drill 1/4-inch hole for the sensor probe and mount it to
the ductwork with enclosed screws
(see Fig. 15)
.
3.
Connect wires to S1, S2, S3, or S4 terminals at the EIM.
4.
Setup the S1, S2, S3, or S4 terminals in the Installer
Setup at the thermostat.
Fig. 15. Mounting Discharge/Return Air Sensor.
Selecting Thermostat Location
Install the thermostat about 5 ft. (1.5m) above the floor in an area
with good air circulation at average temperature. See Fig. 16.
Fig. 16. Selecting thermostat location.
Do not install the thermostat where it can be affected by:
— Drafts or dead spots behind doors and in corners.
— Hot or cold air from ducts.
— Radiant heat from sun or appliances.
— Concealed pipes and chimneys.
— Unheated (uncooled) areas such as an outside wall behind
the thermostat.
Installing Wallplate
CAUTION
Electrical Hazard.
Can cause electrical shock or equipment damage.
Disconnect power before wiring.
The thermostat can be mounted horizontally on the wall or on a
4 in. x 2 in. (101.6 mm x 50.8 mm) wiring box.
1.
Separate wallplate from thermostat.
Fig. 17. Separate wallplate from thermostat (THX9421).
2.
Position and level the wallplate (for appearance only).
3.
Use a pencil to mark the mounting holes.
MOUNT RETURN
SENSOR HERE
MOUNT DOWNSTREAM
OF BYPASS HUMIDIFIER,
DEHUMIDIFIER OR
VENTILATOR
HEAT
EXCHANGER
BLOWER
VENTILATOR
OR
DEHUMIDIFIER
MOUNT
DISCHARGE
SENSOR HERE
BYPASS
HUMIDIFIER
M33079A
M32995
5 FEET
[1.5 METERS]
YES
NO
NO
NO
M19925
1324
