Dehumidification — How It Works - Lennox iComfort Wi-Fi Setup Manual

DEHUMIDIFICATION — HOW IT WORKS
This is applicable only to the XC17, XP17, XP17N, XC21, XP21 and XP21N models.
DRY, MODERATE AND HUMID —These modes allow user control of relative humidity between 40% and 60% RH. These
conditions must be met for either Moderate or Humid modes to operate:
•
dehumidification mode has been enabled, and
•
the unit is in COOL mode, and
•
dehumidification demand exists (0V present at H), and
DRY mode if off with no dehumidification control.
MODERATE mode requires presence of cooling demand (Y for HP heat).
HUMID mode requires the system to be in the cooling mode and to of had a cooling call prior to the dehumidification call.
Their does not need a cooling call to be present to bring on Humid dehumidification. This mode can over cool the space by 2
degrees while trying to satisfying the dehumidification demand.
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Humiditrol or Auxiliary Dehumidifier mode requires:
NOTE - Systems using iComfort
cut when using with a iComfort Wi-Fi
•
dehumidification has been enabled on installer settings, and
•
the unit is in COOL mode, (or if in AUTO and at least one thermostat cooling call made prior to the dehumidification
demand), and
•
a dehumidification demand exists (RH above set point), and
•
outdoor temperature is below 95°F and indoor temperature above 65°F (Humiditrol only).
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iComfort Wi-Fi
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and a dehumidifier - "Dehum" jumper on furnace/air handler control does not need to be
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thermostat.
•
MAX adj. - Indoor temp > 2°F above heating set point
•
MID adj. - Indoor temp >
•
MIN adj. - Indoor temp > 2°F below cooling set point
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HEAT setpoint + COOL setpoint
2
7-Day Programmable Communicating Thermostat