Options Screen Installer Settings - Lennox L7742U Programming And Application Manual

Options screen Installer Settings

Installer Settings
[
OPTIONS TAB > INSTALLER SETTINGS > [ENTER] [ENTER]
Press OPTIONS tab, then use the arrows to select INSTALLER SET-
TINGS. Press ENTER twice.
INSTALLER SETTINGS
−−−−−−−−−−−−−−−−−−−−
NOTE − After the first Enter", a note states MUST BE SET BY QUAL-
IFIED PERSON". Press Enter again to access installer settings.
The following items are available for modifying. Follow the instructions
for each parameter.
SYSTEM SETUP Sets the thermostat for operation with a heat pump
or non-heat pump and defines the number of compressor stages and
the number of backup heat stages. The default settings for the system
are Non−heat Pump, Gas/Oil, 2 compressor stages, 2 indoor heat
stages.
Use arrows to select from the list; then press ENTER.
SYSTEM SETUP
NON HEAT PUMP
HEAT PUMP
COMPRESSOR STAGES
INDOOR HEAT STAGES
For NON HEAT PUMP, use arrows to select backup heat: NO HEAT,
GAS/OIL, or ELECTRIC; then press SAVE.
NON HEAT PUMP
NO HEAT
GAS/OIL
ELECTRIC
For HEAT PUMP, use arrows to select backup heat: NO BACKUP
HEAT, DUAL FUEL (GAS/OIL), or ELECTRIC; then press SAVE.
]
For COMPRESSOR STAGES, use arrows to select either 1 or 2 com-
pressor stages; then press SAVE.
For INDOOR HEAT STAGES, use arrows to select 1 or 2 indoor heat
stages; then press SAVE.
OUTDOOR SENSOR default NO. Balance points, Humiditrol, Dew
Point Control require an outdoor sensor. This control sets the thermo-
stat to test for and report outdoor temperature. Scroll to OUTDOOR
SENSOR and press ENTER; use arrows to select YES; press SAVE.
NOTE − If outdoor sensor is not present and if user tries to select the
options DISPLAY INFO −> OUTDOOR TEMP, LOW BALANCE POINT,
HIGH BALANCE POINT, DEW POINT CONTROL, HUMIDITROL a
message is displayed OUTDOOR SENSOR REQUIRED" instead of
scroll options for these menus. Information about installing the sensor
is described on Page 30.
RESIDUAL COOL default is zero seconds. This is the time, in sec-
onds, that the fan runs after a call for cooling is satisfied in order to deliv-
er any residual cooling ability from the coil and ductwork into the condi-
tioned space. Scroll to RESIDUAL COOL; press ENTER. Use arrows
to select seconds: 0, 30, 60, 90, and 120; press SAVE.
Page 13
HEAT PUMP
NO BACKUP HEAT
DUAL FUEL (GAS/OIL)
ELECTRIC
COMPRESSOR STAGES
2
INDOOR HEAT STAGES
2
OUTDOOR SENSOR
DEFAULT(NO) YES
RESIDUAL COOL
DEFAULT(OS) 6OS
ComfortSenset Model L7742U Touch Screen 7−Day Programmable Thermostat