Honeywell PRESTIGE THX9321 - Manual (Page 104)

THX9321 PRESTIGE ® 2.0 AND THX9421 PRESTIGE ® IAQ WITH EIM
68-0311—02 104
7. Set the desired lockout option. See Fig. 214.
Fig. 214.
NOTE: ISU 10140 gives the option to lockout ventila-
tion during calls for humidification. This helps
maintain the desired humidity level.
Control Humidification Level
1. Press MENU, then scroll to select Humidification.
2. Press Auto to use the humidifier to maintain your desired
humidity level.
3. Press Off to turn off the humidifier.
4. Move the slider bar to the humidity level you prefer, then
press DONE. The humidification setting range is
10–60% in 5% increments.
5. Press MORE SETTINGS if frost or condensation
appears on windows. A lower number adjusts humidity to
help prevent these problems. Use a higher number if
indoor air is too dry.
6. To adjust the Window Protection setting, press More Set-
tings from the Humidification screen. Window Protection
is set on a scale from 1-10. A setting of “1” represents
poorly insulated windows and a setting of “10” repre-
sents well insulated windows. A lower number automati-
cally reduces the humidity to help prevent frost or
condensation on your windows. Use a higher number if
indoor air seems too dry. To prevent frost/condensation
on your windows during cold outdoor temperatures,
poorly insulated windows require a lower Window Pro-
tection setting, which will limit how much your humidifier
can run.
7. After you set the Window Protection setting, check for
frost/condensation on your windows in the morning. If
frost/condensation is present, adjust the Window Protec-
tion setting to the next lowest number and check for frost/
condensation on your windows the next morning. Con-
tinue to adjust the Window Protection setting to a lower
number until frost/condensation is no longer present.
NOTE: The Window Protection option is only available if
an optional outdoor sensor is installed.
NOTE: If humidification and dehumidification are setup
to operate in the same system mode (Heat, Cool,
Off) and you are sensing humidity from one loca-
tion, the thermostat will automatically enforce a
15% deadband between the humidification and
dehumidification settings. The thermostat will
automatically switch between humidification and
dehumidification to maintain the desired humidity
level.
If humidification and dehumidification are setup
to operate in the same system mode (Heat, Cool,
Off) and you are sensing humidity from two differ-
ent locations using a remote wireless indoor sen-
sor, the thermostat will allow humidification and
dehumidification to operate at the same time, and
there is no deadband between humidification and
dehumidification settings.
Fig. 215.
Press MENU
Scroll to select HUMIDIFICATION
Set humidity to desired level
Window Protection
limits the amount of
humidity to prevent
frost or condensation
on windows
Press More Settings to set:
• Window Protection Setting
• Review humidifier pad or
clean tank / water filter
timer