Setting The Slave Unit Activation Value For Cascade Systems - Navien NR-20DU Manual

Setting the Slave Unit Activation Value for Cascade systems

1
Press the Lock and OK button simultaneously
for 2 seconds with the Power off.
The diagnostics mode is displayed.
Select "0" by pressing up or down button,
Press the OK button.
Setting the operating point offset mode is displayed.
2
sec
2
or
Press the UP or DOWN button to adjust the Activation
Point Value.
Value of - 15.0 will activate the Slave unit(s) when the
Master unit reaches 65% heating capacity.
Value of 15.0 will activate the Slave unit when the
Master unit reaches 95% capacity.
Note Setting value ranges from -15.0 to +15.0.