Navien NR-180(A) Operation & Installation Manual page 75

Adjusting the Temperature:
Use the remote controller to adjust the outlet water
temperature of the Navien Water Heater.
To adjust the hot water temperature, all hot water taps
must be closed, the internal circulator must be off and
any external circulating pumps must also be turned off.
Press the (Up) or (Down) button to scroll until
the desired temperature is displayed on the LCD
Monitor.
To operate the Navien Water Heater, press the "Power"
button and use (Up) and (Down) buttons on the
remote controller until the desired temperature is displayed
on the screen. Then simply open any hot water faucet.
This will automatically light the burner and provide hot
water at the preset temperature.
Navien Water Heater has a built in back-light. The
screen's backlight will illuminate when a button on the
controller is pushed.
NOTE: IF THE BACK-LIGHT ON THE DISPLAY GOES
DARK, THE REMOTE CONTROLLER'S INTERNAL
BATTERY IS DISCHARGED. WAIT FOR A FEW MINUTES
UNTIL THE BATTERY RECHARGES AND THE BACK-
LIGHT WILL AUTOMATICALLY ILLUMINATE THE DISPLAY
AGAIN.
75