Lennox SignatureS
tat 81M26 User Manual

SignatureStat t Thermostat
Page 11
Other Humiditrol
®
Accessory Notes:
If the outdoor sensor is disconnected while Humiditrol
®
is enabled, thermo-
stat will not allow operation in dehumidification mode.
Set point range: 45 to 60% Relative Humidity (RH). Factory default − 50%.
Relative Humidity controls to within 2% on either side of RH set point.
When the D" terminal is activated with 24VAC,.dehumidification is inac-
tive.
Basic, Precision and Humiditrol
®
modes are deactivated by default from
the factory.
When HOLD" modes (Temporary, Vacation) are activated, and Auto-
changeover is enabled, there is insignificant opportunity for dehumidifica-
tion because cooling and heating use the same temperature setpoint.
As a precaution, regardless of how low the heating setpoint has been set,
Humiditrol
®
dehumidification is inhibited below 65ºF indoor temperature.
Changing Time of Day / Day of Week
The time of day must be entered via the menu. This information appears on
the top line of the home screen.
1. From the home screen press
MENU. Use the UP or DOWN
button to highlight DAY/TIME.
Press SELECT.
2. Use the UP or DOWN button to
highlight DAY, HOUR, or MIN-
UTES. Press SET.
3. Use the UP or DOWN button to
scroll through the days of the
week, hours, or minutes. Press
SET to select desired value.
Press FINISHED when complete
(see diagram).
Cycling the Fan
Fan Settings
1. From the home screen press
MENU. Use the UP or DOWN
buttons until FAN is highlighted.
Press SELECT.
2. Use the UP or DOWN buttons to
highlight FAN SETTINGS. Press
SELECT.
3. Three fan setting choices are
available:
ON will turn the indoor blower on
continuously.
AUTO will turn the indoor blower on only when there is a call for
heating or cooling.
INTERMITTENT will turn the indoor blower on for a set period of time
for a given interval. Highlight the choice you desire and press
SELECT.
Intermittent fan default ON time is 5 minutes; Default OFF time is 20
minutes. This function allows users to cycle the indoor blower for a
selectable number of minutes per hour during periods of inactivity of
heating/cooling system. ON time can be set from 1 to 20 minutes in
1−minute steps; OFF time can be set from 10 to 40 minutes in
1−minute steps.
If the HVAC system runs for a
longer period than the ON cycle,
the OFF cycle will start counting
over again when the system
shuts off (see diagram).
MAIN MENU
DAY / TIME
FAN ↑
USER SETTINGS ⏐
INSTALLER SETTINGS
HOME SELECT
MAIN MENU
DAY FRIDAY
HOUR 12 PM
MINUTES 06
HOME SET
MAIN MENU
DAY FRIDAY
HOUR 12 PM
MINUTES 06
FINISHED SET
MAIN MENU
DAY / TIME
FAN ↑
USER SETTINGS ⏐
INSTALLER SETTINGS
HOME SELECT
FAN MENU
FAN SETTINGS
FAN PROGRAM
HOME SELECT
FAN SETTINGS
ON
AUTO
INTERMITTENT
MAIN MENU SELECT
INTERMITTENT FAN
ON TIME 5 MIN ↑
OFF TIME 20 MIN ↓
FAN MENU SELECT

Lennox SignatureS
tat 81M26 Specifications

General

Brand	Lennox
Model	SignatureS tat 81M26
Category	Thermostat
Language	English