Navien NR-21DU, Manual

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Included Items
When you open the box, you will find the following items with the remote controller.
Check the box for each of the following items before installing the remote controller.
User Manual Extension Cable 2 Tapping Screws
Multi Remote Controller Cable
(optional)
Wall Mounting Bracket
Connecting the Extension Cable
1. Connect one end of the extension cable to the
port on the front panel of the water heater.
2. Pass the other end of the extension cable
through the hole in the bracket.
3. Connect the end of the extension cable to the
cable connected to the remote controller.
You can connect up to 2 remote controllers if
necessary.(Optional)
Note
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