Navien NR-20DU User Manual page 22

3
or
Press the Up or Down button to adjust the value
by 1.
Press the OK button to switch to Operation
temperature settings mode.
"S Ot" and the corresponding value are displayed
on the LCD display.
Note
Setting value ranges from 0 to the set
temperature for Cascade On Unit.
Determine the S FU value to set the water heater when the system is in standard mode (not in Cascade) to stop operating
at a specific temperature differential from the storage tank.
4
or
Press the Up or Down button to adjust the value
by 1.
Press the OK button to switch to Stop temperature
settings mode.
"S Ft" and the corresponding value are displayed.
Note
Setting value ranges from 0 to the set
temperature for Cascade Off Unit.
21