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icomfortt Touch Screen 7−Day Programmable Thermostat
Page 13
Installer setup − Page 8 of 8
setup tests equipment HELP
Equipment Name
Filter 1 Timer
Selection
.
.
(various)
.
.
Dehumidification
Control Mode
Humidification
Control Mode
back
(to adjust a setting, highlight
it, then press edit)
Current Value:
(Display Only)
SYSTEM
edit
reset
Figure 16. SYSTEM adjustment screen
save
cancel
Display Only
Basic
Precision
Dew Point Control
save
cancel
Display Only
Basic
Precision
Humiditrol
(or Auxiliary
Dehumidifier)
Humidification Control Mode
Dehumidification Control Mode
Figure 17. Selecting Dehumidification/Humidification mode
HUMIDIFICATION modes
BASIC & PRECISIONĊthese modes allow user control of RH between
15 and 45%. These conditions must be met for either mode to operate:
S humidification mode has been enabled, and
S the unit is in HEAT mode, and
S humidification demand exists (24V present at H), and
S BASIC 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 CONTROLĊDew point adjustment mode will change the
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:
S dehumidification has been enabled on installer settings, and
S the unit is in COOL mode, and
S dehumidification demand exists (RH above setpoint), and
S cooling demand exists (Y1 energized).
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:
S outdoor sensor must be installed and setup
S dehumidification has been enabled on installer settings, and
S the unit is in COOL mode, (or if in AUTO, at least one thermostat cooling
call made prior to the dehumidification demand), and
S a dehumidification demand exists (RH above setpoint), and
S outdoor temp. below 95°F; indoor temp. above 65°F, and
S for HUMIDITROL, Humiditrol comfort adjust parameters as follows:
MAX adj. − Indoor temp > 2°F above heating setpoint
MID adj. − Indoor temp >
HEAT SETPOINT+COOL SETPOINT
2
MIN adj. − Indoor temp > 2°F below cooling setpoint