Unit installation

DCN: 141-00885-16 1/26/06 TZ40 Thermostat Manual 4

Thermostat Control Screen

The thermostat control screen is the default display screen and is the screen that is normally displayed on

the Wall Display Unit. It can be set to switch to a minimized screen of only room temperature after a few

seconds of display. The User Settings menu allows selecting the screen timeout for a minimized screen.

Pressing ANY button will bring this screen back from a minimized screen.

Temperature Display

The WDU will normally display the current temperature from the internal digital temperature sensor or a

remote sensor. The sensors have an accuracy of +/- 1°F(+/- .5°C). The WDU will display temperatures

from -63°F to 191°F. NOTE: If averaging remote sensors are attached, the display will show the

average temperature of all attached averaging sensors.

Setpoint Display

The heating and cooling setpoints are displayed next to the Setpoint Up/Down buttons. In the HEAT

mode, the Up/Down buttons change the heat setpoint. In the COOL mode, they change the cooling

setpoint. When in AUTO mode, the buttons change the last call’s heating or cooling setpoint. Note that

the setpoints will “push” each other if they are adjusted to get within the minimum Heat/Cool separation

(delta T) setting. This is normally 3 degrees.

Clock Display

The current time is displayed in the upper left corner of the main screen. Set the clock from the User

Settings Menu.

Outside Temperature Display

The outside temperature is displayed in the top center of the main screen, if outside temperature

information has been sent to the thermostat or a remote outside temperature sensor is connected to the

WDU.

MODE

FAN MENU

76 H

Economy

Sys Off

Run

No Msg

10:25

tside 60

RUN

74 C