Honeywell Home VisionPRO 8000 Manual page 93

• 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 1014 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.
Ventilation — Outdoor Condition Lockouts
(ISU 1013)
Ventilation will not operate when outdoor conditions
exceed the lockout settings unless you manually call for
ventilation or Ventilation Priority (ISU 1012) is set to
ASHRAE is Priority and ventilation is needed to meet
ASHRAE. Lockouts can prevent ventilation during extreme
weather conditions to keep humid, hot, and cold air out of
the home.
NOTE: This feature requires an outdoor sensor.
If the outdoor sensor also measures humidity, ventilation
will not be allowed when the outdoor dewpoint is above the
level you set. Options are:
• Ventilation Low Temperature Lockout Setpoint
(Off, -20° to 40° F)
• Ventilation High Temperature Lockout Setpoint
(Off, 80° to 110° F)
• Ventilation High Dewpoint Lockout Setpoint
(Off, 65° to 85° F)
Refer to the information below if you need assistance
setting the High Dewpoint Lockout.
• Higher than 80: Extremely uncomfortable
• 75 to 80: Very uncomfortable
• 70 to 74: Quite uncomfortable
• 65 to 69: Somewhat uncomfortable
Ventilate on High Indoor Humidity (ISU
1016)
If set to ventilate on high indoor humidity, the ventilator
turns on to remove excess humidity if the indoor humidity
is 10% above the Humidification setting. The thermostat
must be in the heat mode to ventilate on high indoor
humidity.
Set up Ventilation
Some screens shown in this section may not appear on the
thermostat, depending on how you set up ventilation.
1. Select the Ventilation Type in ISU 1000. See Fig. 226.
2. Select the terminals wired to the Ventilator (or Fresh
Air Damper). See Fig. 227.
3. Select the Ventilation Control Method. See "Ventila-
tion Control Methods (ISU 1005)" on page 92 for
more information. See Fig. 228.
93
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VISIONPRO 8000 WITH REDLINK™
Fig. 226.
Fig. 227.
Fig. 228.
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