User Guide

Operating the Thermostat

ViewStat Communicating Thermostat

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Setting temperatures

Press the Up or Down adjust button. The setting to be changed will begin to flash. Press and hold

the button to change the setting.

 If operating in the HEAT mode, the only temperature set point available to change is the

Heat setting. When the room temperature drops below this setting the heat will come on

(call for heating) to raise the temperature.

EM. HEAT mode uses the HEAT setting.

 If operating in the COOL mode, the only temperature set point available to change is the

COOL setting. When the room temperature rises above this setting the Cooling will come

on (call for cooling) to lower the temperature.

 If operating in AUTO (HEAT or COOL) mode, the first press of the Up or Down adjust

button will indicate which of the two temperature settings will be adjusted – it will be the

one flashing.

 If this is not the desired temperature to adjust, press the Mode button to access the other

temperature setting.

Fan operation

The thermostat can operate the fan either continually (

FAN ON), or only during Heating and

Cooling calls. Press the Fan button to toggle between these two options.

FAN ON is recommended

for media/electronic air cleaners, ventilating equipment, and to allow for humidification in mild

climates.

Backlight operation

Operation of the backlight is configured in the Thermostat Set-Up. Depending on the set-up, the

backlight will light at the press of any button, or it can be disabled (see the Backlighting Set-

Up section on page 48). The backlight will stay on for 10 seconds after the last press of a button.

Network override

If the Network Override has not been disabled in the Thermostat Set-Up, the Network Override can

be initiated by pressing the Enter button. When initiated, the thermostat is taken offline from the

automation system. The thermostat can then only be operated at the thermostat. Pressing the Enter

button again will restore network communication.

Clearing a temporary flashing message

Custom Home Automation systems have the ability to send a temporary message to the message

display. This message will flash until the user acknowledges the message. To acknowledge message

press the Enter button.

Do not set to OFF mode during periods when freezing temperatures could occur.