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Displays DANGER, WARNING, and CAUTION symbols with their meanings.
Emphasizes following all safety instructions to avoid hazards.
Instructions on how to turn the remote controller on and off.
How to set water temperature across two levels using Up/Down buttons.
Information on automatic saving and warnings for high temperatures.
Steps to enter the commercial high temperature mode.
How to adjust temperature by 10°F/5°C in commercial mode.
Crucial warning about potential scalding from high temperatures.
How to activate the controller lock mode by pressing the Lock button.
How to deactivate the controller lock mode.
Procedure to reset errors after resolving the issue.
Addresses issues of no hot water or slow delivery to fixtures.
Solves problems with cold, inconsistent, or insufficient hot water.
Addresses issues where the water temperature is excessively high.
Lists error codes related to ignition, flame, and heat exchanger overheating.
Lists error codes for exhaust overheating and control issues.
Lists error codes for venturi, fan motor, and air pressure problems.
General| Brand | Navien |
|---|---|
| Model | NR-20DU |
| Category | Remote Control |
| Language | English |
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