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THX9321 PRESTIGE
®
2.0 AND THX9421 PRESTIGE
®
IAQ 2.0 WITH EIM
43 68-0311—01
10125 Ventilation Priority Lockouts are Priority
ASHRAE is Priority
Lockouts are
Priority
Both No Lockouts are Priority: The thermostat places a
priority on lockouts versus the ASHRAE 62.2
ventilation standard. The thermostat will not run
ventilation during the following lockout conditions
(if configured) unless you manually call for
ventilation:
• Lockout Ventilation during Outdoor Conditions
(ISU 10130)
• Lockout Ventilation on Humidification or
Dehumidification Calls (ISU 10140)
• Lockout Ventilation during “Sleep” (Residential)
or “Unoccupied” (Commercial) program
periods. Note: This option is set by the user on
the Ventilation screen in the Menu.
ASHRAE is Priority: ASHRAE requires additional
ventilation following a long off cycle. The
thermostat meets the ASHRAE 62.2 ventilation
standard by running additional ventilation when
outdoor conditions are favorable. If ASHRAE cannot
be met when outdoor conditions are favorable, the
thermostat will override the outdoor lockouts and
run ventilation. When using this option, it is
recommended to increase the rate (CFM) of the
ventilation equipment to meet the ASHRAE 62.2
ventilation standard in a shorter run time.
Notes:
• ISU 10140 “Lockout Ventilation on
Humidification or Dehumidification Calls” is not
an option when you select “ASHRAE is Priority”.
• The ability to lockout ventilation during the
“Sleep” or “Unoccupied” program periods is not
an option when you select “ASHRAE is Priority”.
10130 Ventilation Low
Temperature Lockout
Off
-20° F to 40° F (in 5° F
increments)
Off Both No Requires an outdoor sensor.
This ISU is only displayed when ISU 10000
Ventilation Type is set to ERV / HRV or Fresh Air
Damper.
See “Ventilation — Outdoor Condition Lockouts
(ISU 10130)” beginning on page 75.
10130 Ventilation High
Temperature Lockout
Off
80° F to 110° F (in 5° F
increments)
Off Both No Requires an outdoor sensor.
This ISU is only displayed when ISU 10000
Ventilation Type is set to ERV / HRV or Fresh Air
Damper.
See “Ventilation — Outdoor Condition Lockouts
(ISU 10130)” beginning on page 75.
10130 Ventilation High Dew
Point Lockout
Off
65° F to 85° F (in 5° F increments)
Off Both No Requires a Wireless Outdoor Sensor (sense outdoor
humidity).
This ISU is only displayed when ISU 10000
Ventilation Type is set to ERV / HRV or Fresh Air
Damper.
See “Ventilation — Outdoor Condition Lockouts
(ISU 10130)” beginning on page 75.
10140 Lockout Ventilation
on Humidification or
Dehumidification
Calls
Off
On
Off Both No This feature is used to help reach the user's desired
humidity level by not allowing the ventilation
equipment to run during a call for humidification or
dehumidification.
Off: Ventilation is allowed to run during a call for
humidification or dehumidification.
On: Ventilation is NOT allowed to run during a call
for humidification or dehumidification.
Table 2. Installer Setup (ISU) Table. (Continued)
ISU
Number Installer Setup Name Settings Default
Residential,
Commercial
or Both
Requires
EIM Notes