Control Humidification Level; Dehumidification - Residential - Honeywell TH8321 Product Data

Fig. 120.
NOTE: ISU 1014 gives the option to lockout ventila-
tion during calls for humidification. This
helps maintain the desired humidity level.

Control Humidification Level

1. Touch MENU and select Humidification.
Fig. 121.
Humidification
Window Protection
Fig. 122.
2. Select Auto.
Humidification
Off
Fig. 123.
 
3. Touch or to select humidity level.
4. Touch Done to save your settings. Touch Cancel to
ignore changes.
MCR34100
MCR34128
Auto
MCR34129
VISIONPRO® 8000 SMART THERMOSTAT
5. If frost or condensation appears on the windows,
press MENU, scroll down and select Window Protec-
tion.
6. Window Protection is set on a scale from 1–10. A set-
ting of 1 represents poorly insulated windows and a
setting of 10 represents well insulated windows. A
lower number automatically 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 Protection 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
Protection setting to the next lowest number and
check for frost/condensation on your windows the
next morning. Continue to adjust the Window Protec-
tion setting to a lower number until frost/condensa-
tion is no longer present.
NOTE: Internet connection or wired outdoor sensor is
required for Window Protection.
NOTE: If humidification and dehumidification are setup
to operate in the same system mode (Heat, Cool,
Off), 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.

Dehumidification - Residential

The thermostat reads the indoor humidity level and allows
the user to set a dehumidification setting. The thermostat
controls the humidity level using the cooling system or a
whole house dehumidifier.
If humidification and dehumidification are setup to operate
in the same system mode (Heat, Cool, Off), 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.
Dehumidification using the Cooling
System
When set for A/C with Low Speed Fan or A/C with High
Speed Fan, an overcooling limit can be set from 0 °F to 3 °F
(ISU 907). The thermostat uses the cooling system to
reduce humidity by lowering the temperature up to 3° F
below the current cool setpoint until the desired humidity
level is reached.
59
Fig. 124.
33-00096—04