Navien NR-180(A) Operation & Installation Manual page 77

Hot Water Temperature Adjustment:
For Temperatures Above 140°F (140~185°F) (Only "NP-A & NP Series) :
Each time (Up) Key is pressed for 3
seconds, temperature increases by 5°F.
When the desired temperature is reached,
leave alone and it will automatically set.
Each time (Down) Key is pressed, temperature
decreases by 5°F.
Each time Pro Key is pressed for 5
seconds in high temperature adjustment
mode, temperature increases by 10°F
(140~180°F) or 5°F (180~185°F). When
the desired temperature is reached,
leave alone and it will automatically set.
Each time the (Down) Key is pressed,
temperature decreases
(140~180°F) or 5°F (180~185°F).
by 10°F
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