Setting The Temperature Of Dhw Storage Tank Usage Mode - Navien NR-20DU User Manual

Setting the temperature of DHW storage tank usage mode

1
Press the Timer and OK button simultaneously for
2 seconds with the Power off to access the DHW
Storage Tank mode.
Cascade On-unit temperature is ready to be set.
Note
This is not applied when models are set
in internal or external recirculation mode.
• Determine the S OU value to set the water heater while in a Cascade system to provide recovery heat to the storage
tank at a specific temperature differential.
• Maintaining a specific temperature differential between the set temperature at the water heater and the storage tank
temperature will ensure that the water heater operates at maximum efficiency while providing sufficient recovery heat
to the tank.
20
2
sec
2
or
Press the Up or Down button to adjust the
temperature differential value by 1.
Press the OK button to switch to Cascade Off UNIT
temperature settings mode.
Note
Setting value ranges from 0 to 60. The
water heater will operate more frequently
when this value is lower.