Navien CH-180 User's Operation Manual - page 25

Setting up the way of control of hot water

Select which one will be used to control hot water temperature, supply water tem-

perature or return water temperature.

Please turn off the power of Remote 

Controller by pressing ON/OFF button.

If the program and heating button are 

pressed simultaneously for 3 seconds, 

supply water (or return water) heating 

icon flickers.

At this time if the heating button is 

pressed, the icon is changed to return 

water (or supply water)

Leave the dial alone and the display will 

automatically save the savings and 

return to the “OFF” state.