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Remote Control
NR-21DU
Manual
Starting Recirculation - Navien NR-21DU Manual
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Starting Recirculation
During the recirculation,
when NPN Non-condensing water heaters are connected, The preheating icon ashes continuously.
when NPE-A2/S2 condensing water heaters are connected, The preheating icon keeps turning on.
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Quick Links:
Connecting the Extension Cable
Remote Controller
Lcd Display Icons
Setting the Water Temperature
Starting Recirculation
Setting the Recirculation Timer
About Errors and Icons
Basic Troubleshooting and Frequently Asked Questions
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