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ISU
Installer Setup
Number
Name
Thermostat Controls Fan
10060
Ventilation Fan
Control
Equipment Controls Fan
if "fresh air damper" or "passive"
is selected for ISU 10,000. This
setting is not shown and
thermostat controls fan by default.
1 to 6
10090
Number of Bedrooms
1000 to 5000 sq. ft. (in 100 sq. ft.
10090
Size of House
increments)
(90 to 460 sq. m.)
30 to 350 CFM (in 5 CFM
10100
Enter Equipment
increments)
Ventilation Rate
(850 - 9900 LPM)
10% to 100% (in 10%
10120
Ventilation Percent
increments)
On Time
Lockouts are Priority
10125
Ventilation Priority
ASHRAE is Priority
THX9321 PRESTIGE
Table 4. Installer Setup (ISU) Table. (Continued)
Settings
Default
Thermostat
Controls Fan
2 bedrooms
1000 sq. feet
150
30%
Lockouts are
Priority
59
®
2.0 AND THX9421 PRESTIGE
Residential,
Commercial
Requires
or Both
EIM
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.
Residential
No
This ISU is only displayed when ISU10050
Ventilation Control Method is set to ASHRAE
(Residential only).
Residential
No
This ISU is only displayed when ISU10050
Ventilation Control Method is set to ASHRAE
(Residential only).
Residential
No
This ISU is only displayed when ISU10050
Ventilation Control Method is set to ASHRAE
(Residential only).
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).
Residential
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) program period. 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" program period is not an option
when you select "ASHRAE is Priority".
®
IAQ WITH EIM
Notes
68-0311—07
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