Lennox ComfortSense L7742U Programming Manual page 9

RESIDUAL COOL default is zero seconds. This is the
time, in seconds, that the fan runs after a call for cooling is
satisfied in order to deliver any residual cooling ability from
the coil and ductwork into the conditioned space. Scroll to
RESIDUAL COOL; press ENTER. Use arrows to select
seconds: 0, 30, 60, 90, and 120; press SAVE.
RESIDUAL COOL
DEFAULT(OS) 6OS
LOW BALANCE POINT default 25°F (heat pump only,
and if outdoor sensor installed). If outdoor temperature is
below programmed Low Balance Point, compressor heat-
ing is not allowed. The options are OFF or any point from
−40°F to the High Balance Point setting in 1.0°F steps.
LOW BALANCE POINT
DEFAULT(25°F) 25°F
HIGH BALANCE POINT default is 50°F (heat pump on-
ly, and if outdoor sensor installed). If outdoor temperature
is above the High Balance point, then auxiliary heat is not
allowed. The options are OFF or any point from the Low
Balance Point up to 75°F in 1.0°F steps.
HIGH BALANCE POINT
DEFAULT(5O°F) 45°F
DEADBAND default is 4°F. The deadband setting is the
minimum difference between the cooling and heating set-
points. This setting is used in autochangeover mode to en-
sure smooth equipment operation and allows for flexibility
®
in Humiditrol EDA operation. The deadband is adjustable
from 3 to 8°F.
DEADBAND
DEFAULT(4°F) 5°F
SMOOTH SET BACK (SSR) default is ON. When en-
abled, SSR begins recovery up to 2 hours before the pro-
grammed time, such that the programmed temperature is
reached at the corresponding programmed event time. As-
sume 12°F per hour for first stage gas/electric heating and
6°F per hour for first stage compressor based heating or
cooling. With SSR disabled, the control will start a recovery
at the programmed time. Scroll to SMOOTH SET BACK;
press ENTER. Use arrows to select between ON or OFF.
Press SAVE.
SMOOTH SET BACK
DEFAULT(ON) OFF
SSR STG2 LOCK OUT default is 20 minutes. Second
stage operation is not allowed until the last 20 minutes be-
fore the programmed start time. Use this setting to change
the time. Scroll to SSR STG2 LOCK OUT; press ENTER.
Use arrows to select minutes that 2nd stage will be locked
out (20 to 120 min. in 10 min. increments). Press SAVE.
SSR STG2 LOCK OUT
DEFAULT(2OMIN) 4OMIN
CONTACT INFORMATION default
INSTALLING DEALER. This may be programmed with the
dealer or technical service contact. Scroll to CONTACT IN-
FORMATION; press ENTER. A cursor appears to the left
of the first line. Use arrows to select letters, numbers, and
special characters. When the first character is identified,
press NEXT to advance to the next character; repeat to in-
put the desired contact information. Press SAVE when fin-
ished.
CONTACT
INSTALLING DEALER
TEMPERATURE OFFSET default is 0°F. This setting
can be used to offset the displayed space temperature by
up to +/− 5°F. This offset also applies to the control temper-
ature. Scroll to TEMPERATURE OFFSET; press ENTER.
Use arrows to select a new offset. Press SAVE.
HUMIDITY OFFSET default is 0%. This can be used to
offset the displayed and controlled space relative humidity
(RH) by up to +/− 10% RH. Scroll to HUMIDITY OFFSET;
press ENTER. Use arrows to select a new offset. Press
SAVE.
See separate section (Page 13) for details.
COMPRESSOR PROTECT default is ON; it may be
turned OFF, however, after one compressor cycle, it will re-
vert back to ON. If the system is running in compressor
protection, the home screen displays WAIT" only if there
is cooling or heating call for the compressor (Y1/Y2). If
compressor protection is running and there is a demand for
electric heating, the system waits for the compressor
protection timer to expire. Scroll to COMPRESSOR PRO-
TECT; press ENTER. Use up/down arrows to select OFF.
Press SAVE.
DAYLIGHT SAVING TIME (DST) default setting is ON
(enabled). Note: Beginning in 2007, DST will begin on the
second Sunday in March and end the first Sunday in No-
vember. In the U.S., clocks spring forward from 1:59 a.m.
to 3:00 a.m.; in fall, clocks fall back from 1:59 a.m. to 1:00
a.m. If the community or state opts out of DST, turn this
OFF. Scroll to DAYLIGHT SAVING TIME; press ENTER.
Use up/down arrows to select OFF. Press SAVE.
HUMIDITY SETTING See separate sections − Humidifi-
cation (Page 10) and Dehumidification (Page 11).
STAGE DELAY AND DIFFERENTIAL SETTINGS The
differential or delay settings in the Installer Settings menu
are:
is CONTACT
See Page 13 for more stage delay and differential details.
CUSTOM REMINDERS Two additional reminders may
be created using a text message. This will appear in the list
of reminders and the user can then select the time for the
reminder to be displayed. Scroll to CUSTOM REMINDER
1 or 2. Press ENTER. To create a reminder, press EDIT.
Page 9
TEMPERATURE OFFSET
DEFAULT(O°F) 3°F
HUMIDITY OFFSET
DEFAULT(O%) 2%
COMPRESSOR PROTECT
DEFAULT(ON) OFF
DAYLIGHT SAVING TIME
DEFAULT(ON) OFF
STG DELAY TIMERS
STG 1 DIFF
STG 2 DIFF
STG 2 DELAY
STG 3 DIFF
STG 3 DELAY
STG 4 DIFF
STG 4 DELAY
H/C STGS LOCKED IN
STG 2 HP LOCK TEMP
CUSTOM REMINDER 1
ComfortSenset Model L7742U Touch Screen
7−Day Programmable Thermostat