Entering High Temperature Mode (Commercial Mode) - Navien NR-20DU Manual

Entering High Temperature Mode (Commercial Mode)

1
10
se c
Press and hold the Up and Down button
simultaneously for 10 seconds.
When this mode is available, "HIGH" appears for
3 seconds.
When this mode is unavailable, "LoW" appears
for 3 seconds.
To prevent instant scalding or severe
burns, check the set temperature before
using hot water.
2
5
sec
Press the Up button for 5 seconds to increase the
temperature by 10°F (5°C), and press the Down
button to decrease the temperature by 10°F (5°C).
Commercial Warranty applies when this
Note
mode is used. Refer to the Warranty in
the Operation manual for more details.
Commercial mode is only available for
select models. Refer to the Operation
Manual supplied with the water heater.