Navien NR-20DU Manual page 35

Safety Instructions
Included Items
Connecting the Extension Cable
Attaching the Wall Mounting Bracket
Remote Controller
LCD Display Icons
Turning the Controller On or Off
Setting the water temperature
Entering High Temperature Mode (Commercial Mode)
Entering Lock Mode
Setting the clock
Setting the Recirculation timer
Canceling all timer settings
Setting the initial number of activating units for Cascade systems
Setting the temperature of DHW storage tank usage mode
Setting the Slave Unit Activation Value for Cascade systems
Setting the Slave Unit Shutdown Value for Cascade systems
Additional features for Cascade systems
About errors and icons
About scale warning
Basic Troubleshooting and Frequently Asked Questions
Error Code Guide
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