Navien NR-21DU, Manual

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Canceling all timer settings
Press and hold the Timer and OK button
simultaneously for 2 seconds.
"CLR" appears for 3 seconds and all timer settings
are canceled.
Note Canceling all timer settings is available only
when NPN Non-condensing water heaters
are connected.
Additional features for Cascade systems
Standby feature before On/Off
This feature allows the system to stand by until the
Power is switched to On or Off.
"WAIT" is displayed while the entire Cascade water
heater is powered ON or OFF.
System info on the Slave panel
When the remote controller is connected to the
wrong panel, its ID is displayed on the LCD display
as an error. In this case, you cannot control or
change the settings.
Connect the remote controller to the Master panel
correctly.
Note This is applied to models with Cascade
systems only.
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