2.6 Installing the Batteries
nGently pull out the battery cover.
oInstall the batteries as shown. Observe the polarity.
pReinstall the battery cover. You will hear a clicking sound.
When batteries are installed for the first time, the thermostat per- forms a sequence of tests for about 5 seconds.
Afterwards, the thermostat displays the ambient temperature. It is normal that the displayed temperature will be higher than the ambi- ent temperature if you hold the thermostat in your hands. It will return to normal shortly after the thermostat is installed on the wall. By default, the setpoint is 21°C (70°F).
2.7Completing the Installation
nOnce the baseplate and the batteries are installed, mount the thermostat on the baseplate.
oSecure the thermostat using the locking screw and install the faceplate.
pApply power back to the system.
3.Basic Functions
3.1 System Operating Mode
Use this selector switch to set the system to heating mode (HEAT), cooling mode (COOL), or Off.
Note: When you place the thermostat in cooling mode,
you might need to wait up to five minutes before cooling can start.
This delay is a safety feature for the compressor. The | icon will |
flash on the screen until cooling can start again. |
|
3.2 Fan Operating Mode
Use the selector switch to set the fan to automatic mode (AUTO) or continuous mode (ON).
Note: This switch is not used in a
AUTO | The fan operates only when heating or cooling is activated. |
|
|
ON | The fan operates continuously. |
|
|
3.3 Viewing and Setting the Ambient Temperature
The ambient temperature is normally displayed. To view the set-
point, press once on one of the 
buttons. The setpoint is dis- played for 5 seconds and is indicated by the 
symbol on the
display. During the setpoint display, press one of the 
buttons to change it.
3.4 Backlight
The display illuminates for 12 seconds when the backlight button or
either of the 
buttons is pressed.
3.5 Unoccupied Mode (TH148LE only)
To place the thermostat in unoccupied mode, see section 2.4. In this
mode, the 
icon is displayed and only the 
buttons work to allow a temporary bypass.
3.5.1 Temporary Bypass (TH148LE only)
If you modify the setpoint (using the 
buttons) when the thermo- stat is in unoccupied mode, the thermostat temporarily bypasses the setpoint of the unoccupied mode. The new setpoint will be main- tained for 2 hours, then the thermostat will return to the setpoint of
the unoccupied mode. The 
icon flashes during the bypass.
3.6 Low-Battery Indicator
An icon appears when the batteries need replacement. This icon will flash for 120 days, then the thermostat will cut power to the heating/cooling unit. The icon dis- appears once the batteries are replaced and the ther- mostat reinstalled on its base.
Warning: Before removing the batteries, place the system switch on the thermostat to Off. Otherwise, the heating/cooling unit might still be running even after the batteries are removed.
Note: The thermostat settings are not erased when the batteries are dead or removed.
TH147 and TH148LE |
