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

Entering High Temperature Mode (Commercial Mode)

1
10
sec
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.
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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).
Note
• Commercial Warranty applies when this
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.
11