Navien CH-180 Installation Manual page 55

FND1 of the slave 1 unit will read "S001".
Slave 2 unit also can be set-up as above.
After the slave set-up, each FND1 will read as below:
3.3 Set-up finish
After the slave set-up, push and hold the Tack SW3 and Tack SW4 of the master unit
simultaneously for 3 seconds.
All the FNDs will display the setting temperature and set-up procedures are finished.
4. Master unit Change
Because a multiple unit shall use only 1 combination Water Heater / Heating Boiler and the combination
Water Heater / Heating Boiler shall be a master unit, it is impossible to change the master unit.
5. Slave unit Addition/Removal
It is always possible to add or remove the slave unit. After all unit power OFF, the communication
cable is added or removed on the PCB according to slave unit addition or removal.
There are two cases for system set-up;
Master unit unchanged: In this case, it is necessary to change the processing mechanism of the
master unit. The set-up procedures are as below: (5.1 – 5.3)
5.1 Master unit set-up
To add or remove the slave unit, DIP SW1 and SW2 of the master unit PCB are changed as below:
DIP SW1 DIP SW2
DIP Switch set-up of the master unit PCB: Slave unit addition/removal
#1 switch (DIP SW1) and #6-8 switches (DIP SW2) should be set to ON position.
After all unit power ON, push and hold the Tack SW3 and Tack SW4 of the master unit
simultaneously for 3 seconds.
Each FND1 will display on the PCB as below:
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