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ISU
Installer Setup
Number
Name
10K
5030
Indoor Temperature
Sensor Type
20K
Thermostat (Internal)
5040
Which Sensors will be
Sensor Name (Remote)
used for
TEMPERATURE
Sensor Name (Remote)
Control? (Multiple
Sensor Name (Remote)
Sensors are
Sensor Name (Remote)
Averaged)
Sensor Name (Remote)
Sensor Name (Remote)
(Up to 6 Remote Sensors)
None
5050
What Terminals are
S1
Wired to the Outdoor
Temperature Sensor?
S2
S3
S4
None
5070
What Terminals are
Wired to the Return
S1
Air Temperature
S2
Sensor?
S3
S4
10K
5080
Return Air
Temperature Sensor
20K
Type
None
5090
What Terminals are
Wired to the
S1
Discharge Air
S2
Temperature Sensor?
S3
S4
THX9321 PRESTIGE
Table 4. Installer Setup (ISU) Table. (Continued)
Settings
Default
10K:
if ISU 1010
Application is
Residential
20K:
if ISU 1010:
Application is
Commercial
Sensors are
Averaged
(Internal and
Remote)
None
None
10K
None
47
®
2.0 AND THX9421 PRESTIGE
Residential,
Commercial
Requires
or Both
EIM
Both
Yes
Wired Sensors requires an EIM (Equipment
Interface Module).
Select 10K or 20K based on the sensor
installed. Refer to resistance values below:
C7189U1005 = 10K ohm
C7772 = 20K ohm
TR21 = 20K ohm
TR21-A = 10K ohm (IMPORTANT - the TR21-A
must be used in combination with a TR21
sensor or another TR21-A sensor for the
thermostat to calculate the correct indoor
temperature reading).
See "Wiring guide — Wired Indoor Sensors"
beginning on page 158 for information on the
sensor type you should select based on how the
sensors are wired. For example, you would
select 20K when you have two TR21-A (10K)
sensors wired in series.
Both
No
Select the sensors to be used for temperature
control. If you select more than one, the
thermostat will average the temperature
readings from each sensor.
See "Remote Indoor Sensors" beginning on
page 132.
Both
Yes
Wired Sensors requires an EIM (Equipment
Interface Module).
Both
Yes
Wired Sensors requires an EIM (Equipment
Interface Module).
Both
Yes
Wired Sensors requires an EIM (Equipment
Interface Module).
Select 10K or 20K based on the sensor
installed. Refer to resistance values below:
50062329-001 = 10K ohm
32005180-002 = 10K ohm
C7735A1000 = 10K ohm
C7770A = 20K ohm
C7041 = 20K ohm
Both
Yes
Wired Sensors requires an EIM (Equipment
Interface Module).
®
IAQ WITH EIM
Notes
68-0311—07
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