Navien NCB700-24L User's Information Manual page 10

2.3.2 Buttons
Using the buttons on the front panel, you can turn on or off the boiler,
monitor the current operation status, and set the values required
for the boiler's operation, such as central heating and DHW supply
temperatures. Refer to the following table for detailed information.
a
c
e
Menu button
Access to the Main menu screen.
OK button
Access to the selected item.
Down button
Decreases the temperature setting,
parameter or moves down.
a
b
c
Back button
b
Access to the previous screen.
Up button
d
Increases the temperature setting,
parameter or moves up.
Power button
f
Turns the water heater on or off.
d
e
f
About the Boiler 9