Lennox International Inc. 43558 - Manual (Page 22)

42
42 OPERATION
Vacation (Programmable) Hold
This thermostat can hold a fixed temperature for a selected number of days (up to 30). After the selected number of days, the thermo-
stat will return to normal program operation. This feature allows you to return home to your normal comfort setpoint temperatures.
■ Press and hold for 2 seconds to enter Vacation Hold mode. The set tem-
perature will be the current room temperature and the Vacation counter
will be set to 1 day.
■ Use to set the Vacation Hold temperature.
■ Press to set the Vacation Hold counter to the number of days you will be
away from home.
■ “Vacation” will alternate on the display with the day and any other
messages.
To end Vacation Hold:
■ Press to return to the current program. The flashing Vacation display will be canceled.
NOTE: The Auto Season Changeover feature will not operate while the thermostat is in Vacation (Programmable) HOLD.
Refer to the Auto Season changeover feature on page 43 for more information.
Vacation
Set Temp
System
Day
Fan
Temp
day-time
hold
vacation
or
ret-clear
41653_model43558.pmd
43
43 Auto Season Changeover
When the System Selection is in AUTO position, the thermostat
will automatically change between Heating and Cooling systems,
depending on your program. We recommend keeping your pro-
grammed heating and cooling temperatures at least 5
° F (3 ° C)
apart to allow the Auto Season Changeover to occur when the
appropriate temperature span has been reached. However, if
your heating and cooling programs set temperatures are close,
there is a built-in program to prevent the thermostat from
changing unnecessarily. This “Deadband” can be adjusted. Refer
to the Options Menu section on pages 18-21.
Auto Season Changeover is disabled when the thermostat is in
Temporary or Permanent Override, or Vacation Hold, as these
overrides are energy saving settings. While in any of these
modes, “AUTO” will be temporarily removed form the LCD dis-
play. “AUTO” will return when these holds are cleared. Auto Sea-
son Changeover will still function in Home Today mode, as this is
a comfort setting.
For example, you may have the following temperatures pro-
grammed at a given time:
Heat Set Temp = 68 ° F
Cool Set Temp = 78 ° F
If the room temperature rises above 78 ° F, then the thermostat
will automatically change to cool mode and turn on the air
conditioner.
Likewise, the thermostat will automatically change to heat mode
and turn on heat when the room temperature falls below 68
° F.