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THX9321 PRESTIGE
®
2.0 AND THX9421 PRESTIGE
®
IAQ 2.0 WITH EIM
68-0311—01 96
REMOTE INDOOR SENSORS
For installation, see “Mounting C7189R1004 Wireless Indoor
Sensor” on page 14, and “Mounting C7189U1005 Wired
Indoor Sensor” on page 14. For wiring, see “Wiring guide —
Wired Indoor Sensors” on page 119.
Indoor Sensor Operation
Temperature Control
The thermostat can be set to respond to its internal
temperature sensor, or to an optional remote indoor sensor. If
multiple sensors are used, the thermostat will average the
temperature detected at each sensor.
Fig. 200.
Humidification control
If optional remote indoor sensors are installed, you can choose
which sensor you want to use for humidification control. You
can use a different sensor for dehumidification.
NOTE: Requires wireless indoor sensor.
Fig. 201.
Dehumidification control
If optional remote indoor sensors are installed, you can choose
which sensor you want to use for dehumidification control. For
example, you can use one sensor for humidification control,
and another for dehumidification.
NOTE: Requires wireless indoor sensor.
Fig. 202.
Wireless Indoor Sensor
The wireless indoor sensor senses temperature and humidity
in remote locations and communicates that information
wirelessly to the thermostat.
The indoor sensor can be used to do the following:
• Maintain a more consistent temperature throughout the
building by averaging temperatures. Temperatures from all
sensors, including the thermostat, are weighted equally.
• Relocate sensing location (thermostat is in a poor location).
• Relocate the thermostat (if you want to hide the thermostat).
• Humidify and dehumidify in separate spaces (for instance,
humidify on the main level, and dehumidify in the crawl
space).
You can connect up to 6 Wireless Indoor Sensors to the
thermostat. If you connect a Wired Indoor Sensor network (1,
4, 9, etc. sensors) to the S1 or S2 terminals, you can connect
up to 5 Wireless Indoor Sensors to the thermostat.
The indoor air sensor has a 1 year battery life.
Battery level indicators (when batteries are inserted)
• Good: Status light flashes green for 5 seconds.
• Low: Status light flashes red for 5 seconds. Use fresh
batteries.
Battery level indicators (during use)
• Good: Status light remains off.
• Low: Battery power will be depleted in about 2 months.
Thermostat displays Low Battery warning. Status light
remains off.
• Critical: Battery power will be depleted in about 2–3 weeks.
Status light flashes red.