Honeywell THX9321 Prestige 2.0 Product Data page 61

ISU Installer Setup
Number Name
10120 Ventilation Percent
On Time
10125 Ventilation Priority
10130 Ventilation Low
Temperature
Lockout
Table 4. Installer Setup (ISU) Table. (Continued)
Settings
10% to 100% (in 10%
increments)
Lockouts are Priority
ASHRAE is Priority
Off
-20° F to 40° F (in 5° F
increments)
®
THX9321 PRESTIGE 2.0 AND THX9421 PRESTIGE
Residential,
Commercial
Default or Both
30% Both
Lockouts are Residential
Priority
Off Both
61
Requires
EIM Notes
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).
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".
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 113.
®
IAQ WITH EIM
68-0311—02