Lennox ComfortSense L7742U Programming Guide

ComfortSenset Model L7742U Touch Screen
7−Day Programmable Thermostat
Page 7
Options screenReminders & User
Settings
CLEAN button
When you select the OPTIONS tab, two buttons appear
near the bottom of the screen labeled CLEAN and ENTER.
Press the CLEAN button to deactivate the touch" zones
for 30 seconds. Clean the screen with a soft cloth and a
mild glass cleaning solution.
The Options screen provides user and installer access to
the various features for setup and access to the reminders.
REMINDERS
USER SETTINGS
Reminders [OPTIONS TAB > REMINDERS > [ENTER] ]
Set timers from 1 to 24 months in either calendar time or
system run time. Reminders appear when it is time to ser-
vice the following (for more details on REMINDERS, see
Page 17):
REPLACE MEDIA FILTER
DUE FRI FEB 15 O8
REPLACE METAL INSERT
DUE SUN SEP 14 O8
REPLACE HUM PAD
DUE FRI FEB 15 O8
REPLACE UV LAMP
DUE THU SEP 14 O8
ROUTINE SYS CHECK−UP
DUE IN 216O HOURS
CUSTOM REMINDERS
DUE SUN APR 13 O8
User Settings [OPTIONS TAB > USER SETTINGS > [ENTER] ]
Press the OPTIONS tab; use the arrows to select USER
SETTINGS. Press ENTER.
USER SETTINGS
INSTALLER SETTINGS
The following items are available for modifying. Follow the
instructions for each parameter.
DATE/TIMESet month, day, year, hour, and minute us-
ing DATE/TIME option. Select DATE/TIME; press EN-
TER. Small, filled up-arrow is selected column; use up/
down arrows to adjust; press box below each small
up-arrow to select each column. Adjust; press SAVE.
FEB 11 2OO8 12PM 49
MON DAY YR HR MIN
CANCEL
| | | | | | SAVE|
F/Cdefault is Fahrenheit; to change to Celsius, scroll to
F/C; press ENTER. Use arrows to change to C; press
SAVE.
F OR C
DEFAULT(F) F
12 OR 24 HOUR clockdefault is 12H; to change, scroll to
12 OR 24 HOUR; press ENTER. Use arrows to change to
24H; press SAVE.
12 OR 24 HOUR
DEFAULT(12HR) 12H
EVENTS DAILY 2 OR 4default is 4; to change, scroll to
EVENTS DAILY 2 OR 4; press ENTER. Use arrows to
change to 2; press SAVE.
EVENTS DAILY 2 OR 4
DEFAULT(4) 2
DISPLAY INFOcontrols some of what is displayed in the
field below the temperature and above the time on the
HOME screen; it may display OUTDOOR TEMP, IN-
DOOR RH (relative humidity), or neither if TEMP and RH
are turned OFF. Scroll to DISPLAY INFO; press ENTER.
Use arrows to select TEMP or RH; press ENTER.
DISPLAY INFO
OUTDOOR TEMP
INDOOR RH
NOTE − When accessing the OUTDOOR TEMP op-
tion OUTDOOR SENSOR REQUIRED" will display if
not turned ON in the installer settings. The home
screen will display NO OUTDOOR SENSOR" if the
physical sensor is not installed.
For INDOOR RH, use arrows to select ON or OFF; then
press SAVE.
INDOOR RH
DEFAULT(OFF) ON
For OUTDOOR TEMP, select ON or OFF; then press
SAVE.
OUTDOOR TEMP
DEFAULT(OFF) ON
HUMIDITROL ADJUSTIf Humiditrol is enabled in the in-
staller settings, then this adjustment affects overcooling
operation. Overcooling ranges from 2ºF below the cool-
ing setpoint (MIN setting) down to 2ºF above the heating
setpoint (MAX setting). Halfway between the two settings
is the MID setting. The default setting is MAX; to change to
MID or MIN, scroll to HUMIDITROL ADJUST; press EN-
TER. Use arrows to scroll to MID or MIN; then press SAVE.
HUMIDITROL ADJUST
DEFAULT (MAX) MIN
NOTE − Humiditrol does not function if the outdoor temper-
ature is 95ºF or greater nor when t he indoor temperature is
65ºF or less.
FAN CIRCULATEAs an option to running the fan all the
time, CIRCulate allows the user to decide how much the
fan will run during periods of equipment inactivity. The fan
ON time is always set to 5 minutes. This option will cause

Lennox ComfortSense L7742U Specifications

General

Brand	Lennox
Model	ComfortSense L7742U
Category	Thermostat
Language	English