Lux Products P621Ia Thermostat User Manual


 
screen to advance forward on its own, or press the NEXT button (behind the door)
one time to jump ahead rapidly. Now use the UP/DOWN buttons to select your
desired set temperature that will be used for the Setback duration. Just like the
previous step, you can either wait for the screen to advance on its own, or press
the NEXT button to advance and return to the Normal Run screen.
TO CANCEL A SETBACK: While in the Normal Run screen, press and hold the
SETBACK button for at least 2 seconds. The word “OVERRIDE” will disappear
from the screen and the Setback will be cancelled. Moving the System Mode
switch or Set Slide switch, will also cancel a Setback.
TEMPERATURE LIMIT STOPS: There are two independent set temperature limit
stops: a maximum heat set temperature, and a minimum cool set temperature.
These stops do not prevent a user from performing normal actions like
Temperature Override or Hold. The Heat Limit Stop prevents the set temperature
from being adjusted higher than the heat limit setting. The Cool Limit Stop
prevents the set temperature from being adjusted lower than the cool limit
setting. Each of these temperature stops is user adjustable in one-degree
increments, and these settings are protected by a selectable 2-digit code to
prevent unauthorized tampering. By default, this 2-digit code is “00”, and the
temperature stops can be used as-is with this code.
NOTE: The Temperature Limit Stop settings need to be performed in a timely
manner, as the thermostat will timeout and automatically exit the setting screens
after approximately 10 seconds without a button press.
TO SET THE HEAT LIMIT STOP: Place the System Mode switch in the OFF position,
and the Set Slide switch in the RUN position. Press and hold the UP button while
sliding the System Mode switch from OFF to HEAT. The words “STOP” and “LOCK
CODE” will appear on the screen, along with two digits. Use the UP/DOWN
buttons to select the proper code to access the heat limit setting. Press the
NEXT button to accept the setting. If the code you tried was not correct, the
thermostat will exit and return to the Normal Run screen with no changes made.
If the entered code is correct, the screen will add the word “SET” and display the
current heat set temperature limit. Use the UP/DOWN buttons to adjust the
maximum heat set temperature value. Press the NEXT button to accept the
setting and return to the Normal Run screen in heat mode.
25