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THX9321 PRESTIGE
®
2.0 AND THX9421 PRESTIGE
®
IAQ 2.0 WITH EIM
68-0311—01 42
9210 Dehumidifier Filter
Replacement
Reminder
Off
30, 60, Calendar Days
3 to 12 Calendar Months (in 1
month increments)
Off Both No
10000 Ventilation Type None
ERV / HRV
Passive (Fan Only)
Fresh Air Damper
None Both No None: The thermostat does not control ventilation.
ERV/HRV: The thermostat controls an Energy
Recovery Ventilator or Heat Recovery Ventilator for
ventilation.
Passive (Fan Only): The thermostat turns on the fan
for ventilation.
Fresh Air Damper: The thermostat turns on the fan
and opens a fresh air damper for ventilation.
10020 What Terminals are
Wired to the
Ventilator?
What Terminals are
Wired to the Fresh Air
Damper?
Note: Installer Setup
Name varies
depending on the
ventilation equipment
installed.
None
U1
U2
U3
Thermostat
defaults to the
next unused
universal
terminal (U1, U2,
U3).
Both No Number of Universal Outputs:
THX9321 Thermostat: U1 and U2 terminals
Equipment Interface Module (EIM): U1, U2 and U3
terminals
U1, U2, U3 are dry contacts that require power. See
“Wiring guide — IAQ Equipment (EIM or
Thermostat)” beginning on page 115.
10050 Ventilation Control
Method
ASHRAE
Percent On Time
Defaults to
ASHRAE
when ISU 1010
Application is set
to Residential.
Percent on Time
is the only choice
when ISU 1010
Application is set
to Commercial.
Both No See “Ventilation Control Methods (ISU 10050)”
beginning on page 74.
10060 Ventilation Fan
Control
Thermostat Controls Fan
Equipment Controls Fan
Thermostat
Controls Fan
Both No Thermostat Controls Fan: The thermostat turns on
the ventilation equipment and the fan when
ventilation is needed.
Equipment Controls Fan: The thermostat turns on
the ventilation equipment when ventilation is
needed. The fan is controlled by the equipment.
10090 Number of Bedrooms 1 to 6 2 bedrooms Residential No This ISU is only displayed when ISU10050
Ventilation Control Method is set to ASHRAE
(Residential only).
10090 Size of House 1000 to 5000 sq. ft. (in 100 sq. ft.
increments)
(90 to 460 sq. m.)
1000 sq. feet Residential No This ISU is only displayed when ISU10050
Ventilation Control Method is set to ASHRAE
(Residential only).
10100 Enter Equipment
Ventilation Rate
30 to 350 CFM (in 5 CFM
increments)
(850 - 9900 LPM)
150 Residential No This ISU is only displayed when ISU10050
Ventilation Control Method is set to ASHRAE
(Residential only).
10120 Ventilation Percent
On Time
10% to 100% (in 10%
increments)
30% Both No The thermostat operates ventilation equipment
based on a percentage entered in the installer setup
(ISU 10120). For example, if Percent on Time is set
to 50%, the ventilation equipment will run at
random times during a 1 hour period until it reaches
a 50% run time (approximately 30 minutes).
Table 2. Installer Setup (ISU) Table. (Continued)
ISU
Number Installer Setup Name Settings Default
Residential,
Commercial
or Both
Requires
EIM Notes