Honeywell Home T10 Product Data page 60

1. Select the Dehumidification Equipment in ISU 9000.
2. Select whether the U terminals are Normally Open or
Normally Closed (ISU 9050).
• Normally Open – contacts are normally open and will
close during a call for dehumidification
• Normally Closed – contacts are normally closed and
will open during a call for dehumidification.
3. Set the Overcooling Limit (ISU 9070).
Options:
• 0 °F to 3 °F (A/C with Low Speed Fan)
• 1 °F to 3 °F (A/C with High Speed Fan)
Dehumidification Fan Speed Priority (T10+
Only. See ISU 9005)
If the house has circulation issues to certain parts of the house
when running in low speed, this feature will allow the
thermostat to use the high speed fan more often so that the
conditioned air has better circulation within the home.
• Low Speed Fan with Cool Stage 1 Only when the
thermostat is set to humidify with low speed fan, and
humidity is high, and cooling is running at stage 1,
always run with the low speed fan. When cooling
goes to stage 2, it ramps up to high speed fan.
• Low Speed Fan Always Regardless of which
cooling stage is active, the thermostat will
exclusively use the low speed fan when
dehumidifying.
• User Selectable The homeowner can set the high
speed fan priority based on their comfort level
(reachable via
• Menu > Dehumidification > Options > High speed
fan)
If set to 10, the thermostat will always use the high
speed fan and never switch into low speed mode
operation. If set to 0, the thermostat will only use the
low speed fan and never switch to the high speed
fan when the humidity level is above the Dehumidity
setting.
Fig. 96.
33-00462—05
Dehumidification Using a Whole House
Dehumidifier
The Whole House Dehumidifier option requires a dedicated
unit for dehumidification. The thermostat can be set to control
dehumidification in all modes (Heat, Off, Cool [ISU 9120]). Set
up Dehumidification With Whole House Dehumidifier (Some
screens shown in this section may not appear on the
thermostat, depending on how you set up dehumidification.)
1. Select the Dehumidification Equipment in ISU 9000.
See page 40.
2. Select the system mode(s) to allow dehumidification
ISU 9120. See page 40.
NOTE: Heat includes Heat, Emergency Heat and Auto. If the
system is in Auto mode, the thermostat will allow
dehumidification if the last call was for heat.
Cool includes Cool and Auto. If the system is in Auto mode,
the thermostat will allow dehumidification if the last call was
for cool.
3. Set Dehumidifier Fan Control settings ISU 9130. See
page 40.
• Tstat Controls Fan Thermostat turns on the
dehumidifier and the fan when dehumidification is
needed.
• Equip Controls Fan Thermostat turns on the
dehumidifier when dehumidification is needed. The
fan is controlled by the equipment.
4. Set the desired lockout option. See ISU 9140 on
page 40.
Dehumidification Away Mode (T10+ Only)
See ISU settings 9180-9200.
Your system can be set to control indoor climate while your
home is vacant during the humid season. If configured for
Dehumidification Away Mode, before you leave, touch
MENU, then select Dehumidification Away Mode.
Temperature and humidity will be kept at levels that protect
your home and possessions. When you return, touch Stop to
resume normal operation.
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