Navien NFC-250/175H, Руководство по установке, Страница: 87 / 151

87 Installing a Cascade System
3. On the sub NPE-A2 water heater panel, press
and hold the OK button ( ) for 3 seconds on
the sub unit. Then, the ID 1. Allocated! message
will appear on the sub unit’s front panel display.
When the water heater is set to a sub unit, the
icon will appear on the display.
4. Repeat step 3 to configure the rest of the sub
water heaters in the system.
5. On the main NFC-H boiler panel, press the
Command dial ( ) button when the following
screen appears. All the display screens on the
configured water heaters will return to the
temperature display.
Note
●
To add additional sub water heater
at a later time, repeat step 3.
●
To cancel the cascade
communication settings, on the
main NFC-H boiler panel, press the
Back button ( ) and the Menu
button ( ) simultaneously for
3 seconds, and then select
“4. Cascade Status and Set”. Then,
select “2. Cascade System Removal”
and select “YES”. The water heaters
will revert to independent operation.
To reassign the main NFC-H boiler,
repeat steps 1-5.