Navien NR-21DU, Руководство пользователя

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Entering High Temperature Mode (Commercial Mode)
1 2
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.
Press the Up button to increase the temperature by
1°F(0.5°C), and press the Down button to decrease
the temperature by 1°F(0.5°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.
10
c se
or
Press and hold the Up and Down button
simultaneously for 10 seconds.
Entering Lock Mode
To prevent accidental pressing of the buttons and
to prevent children from adjusting the controller,
you can activate the Temperature Lock Mode.
To activate or deactivate Lock Mode, press the
Lock button for 2 seconds.
When Lock Mode is activated,
• The Lock icon appears on the display.
• All buttons except for Lock button are locked.
Note
• Resetting errors or alarms is still
available with Lock Mode activated.
• You can change the settings from the
front panel with Lock Mode activated.
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