Lennox SignatureS
tat 81M26 Programming And Application Manual page 9

Dehumidification Modes
In BASIC mode, dehumidification occurs if these conditions are met and
signals are present at specific terminals:
S
dehumidification has been enabled, and
S
the unit is in COOL mode, and
S
cooling demand exists (Y1 energized), and
S
dehumidification demand exists.
In PRECISION mode, dehumidification occurs if these conditions are met:
S
dehumidification has been enabled, and
S
the unit is in COOL mode, and
S
dehumidification demand exists , and
S
the room temperature is no lower than 2°F below the setpoint.
S
(If in Auto Changeover Mode) there has been at least one sensible
cooling call made prior to the dehumidification demand.
NOTE − The H terminal is inactive (open circuit) during dehumidification.
DEHUMIDIFY MODE Screen
NOTE − Basic or Precision mode must be turned on before you can adjust
the dehumidification level on the thermostat.
DEHUMIDIFY CONTROL may be adjusted in 1 percent increments; rela-
tive humidity range. To locate and adjust the DEHUMIDIFY CONTROL:
1. From the home screen press
MENU. Use the UP or DOWN
button to highlight DEHUMIDIFY.
Press SELECT for the DEHU-
MIDIFY MENU.
2. From the DEHUMIDIFY MENU,
press SELECT again to choose
MODE.
3. The default setting for dehumidifi-
cation is OFF. To turn on basic de-
humidification mode, select BA-
SIC. To turn
dehumidification mode, select
PRECISION.
4. If you selected BASIC in the pre-
vious step, BAS is displayed on
the right−hand side of the screen.
5. Use the UP/DOWN button to
highlight DEHUMIDIFY; press
SELECT. Setting limits: Min. 45%,
Max. 60%. Default setting: 50%.
6. In the DEHUMIDIFY CONTROL
screen, use the UP/DOWN but-
tons to adjust for the desired hu-
midification level; press SELECT.
Page 9
MAIN MENU
PROGRAM
HEAT / COOL
HUMIDIFY
DEHUMIDIFY
HOME
DEHUMIDIFY MENU
MODE
DEHUMIDIFY
MAIN MENU
DEHUMIDIFY MODE
OFF
BASIC
on precision PRECISION
HUM MENU
DEHUMIDIFY MENU
MODE
DEHUMIDIFY
MAIN MENU
DEHUMIDIFY MENU
MODE
DEHUMIDIFY
MAIN MENU
DEHUMIDIFY CONTROL
50
DEHUM MENU
SignatureStat t Thermostat
SELECT
OFF
50%
SELECT
SELECT
BAS
50%
SELECT
BAS
50%
SELECT
↑
%
↓
SELECT