Installer setup − Page 8 of 8
setup | tests | equipment | HELP |
SYSTEM |
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Filter 1 Timer |
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Dehumidification
Control Mode
Humidificationback
Control Mode
Figure 16. SYSTEM adjustment screen
HUMIDIFICATION modes
BASIC & PRECISION modes allow user control of RH between
15 and 45%. These conditions must be met for either mode to operate:
Shumidification mode has been enabled, and
Sthe unit is in HEAT mode, and
Shumidification demand exists (24V present at H), and
SBASIC mode also requires heat demand exists (Y for HP heat, or W for gas heat [W may be energized with G de−energized]).
DEW POINT CONTROL
humidification setpoint based on the outdoor temperature and a user−de- fined dew point adjustment setting.
DEHUMIDIFICATION modes
In BASIC mode, dehumidification occurs if these conditions are met and signals are present at specific terminals:
Sdehumidification has been enabled on installer settings, and
Sthe unit is in COOL mode, and
Sdehumidification demand exists (RH above setpoint), and
Scooling demand exists (Y1 energized).
Dehumidification Control Mode
Display Only
Basic
Precision
Humiditrol | cancel |
(or Auxiliary |
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Dehumidifier) |
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save
Humidification Control Mode
Display Only |
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Basic |
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Precision |
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Dew Point Control | cancel |
save
In PRECISION mode, dehumidification occurs if all BASIC conditions are true, except cooling demand may or may not be present. Maximum overcool from cooling set point is 2ºF.
HUMIDITROL or AUX. DEHUMIDIFIER mode requires:
Soutdoor sensor must be installed and setup
Sdehumidification has been enabled on installer settings, and
Sthe unit is in COOL mode, (or if in AUTO, at least one thermostat cooling call made prior to the dehumidification demand), and
Sa dehumidification demand exists (RH above setpoint), and
Soutdoor temp. below 95°F; indoor temp. above 65°F, and
Sfor HUMIDITROL, Humiditrol comfort adjust parameters as follows:
MAX adj. − Indoor temp > 2°F above heating setpoint
MID adj. − Indoor temp >
Figure 17. Selecting Dehumidification/Humidification mode
MIN adj. − Indoor temp > 2°F below cooling setpoint
Page 13 | icomfortt Touch Screen 7−Day Programmable Thermostat |