Lennox L7742U Programming And Application Manual page 14

Options screen Installer Settings
LOW BALANCE POINT default 25°F (heat pump only, and if outdoor
sensor installed). If outdoor temperature is below programmed Low
Balance Point, compressor heating 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 only, and if out-
door sensor installed). If outdoor temperature is above the High Bal-
ance 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 dif-
ference between the cooling and heating setpoints. This setting is used
in autochangeover mode to ensure smooth equipment operation and
allows for flexibility in Humiditrol
justable from 3 to 8°F.
DEADBAND
DEFAULT(4°F) 5°F
SMOOTH SET BACK (SSR) default is ON. When enabled, SSR be-
gins recovery up to 2 hours before the programmed time, such that the
programmed temperature is reached at the corresponding pro-
grammed event time. Assume 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 pro-
grammed time. Scroll to SMOOTH SET BACK; press ENTER. Use ar-
rows to select between ON or OFF. Press SAVE.
SMOOTH SET BACK
DEFAULT(ON) OFF
506061−01 06/08
(continued)
®
EDA operation. The deadband is ad-
SSR STG2 LOCK OUT default is 20 minutes. Second stage opera-
tion is not allowed until the last 20 minutes before 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)
CONTACT INFORMATION default is CONTACT INSTALLING
DEALER. This may be programmed with the dealer or technical service
contact. Scroll to CONTACT INFORMATION; 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 input the desired con-
tact information. Press SAVE when finished.
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 temperature. Scroll to TEMPERATURE OFFSET;
press ENTER. Use arrows to select a new offset. Press SAVE.
TEMPERATURE OFFSET
DEFAULT(O°F)
HUMIDITY OFFSET default is 0%. This can be used to offset the dis-
played 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.
HUMIDITY OFFSET
DEFAULT(O%)
See separate section (Page 23) for details.
Page 14
4OMIN
3°F
2%