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

Setting the Slave Unit Shutdown 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 "1" by pressing up or down button,
Press the OK button.
Setting the shutdown point offset mode is displayed.
2
sec
2
or
Press the UP or DOWN button to adjust the
Shutdown Value.
Value of - 5.0 will shutdown the Slave unit(s) when
all cascaded units reach 25% heating capacity.
Value of 5.0 will shutdown the Slave unit(s) when
all units reach 35% capacity.
Note Setting value ranges from -5.0 to +5.0.