Dip Switch Settings - Navien NR-180 Installation Manual

Navien Gas Water Heater Installation
Step 3: Cable connection and DIP switch change
The water heater unit can be connected with other units up to 16 units using communication cables.
After choosing one of the units as the master unit, connect the cables and change the DIP switch 2
on the PCB as below. During step 1, the power supply should be OFF.
Cable connection and DIP switch set-up
-cascade communication cable PCB connecting adapter PCB CN9 port.
CN12
CN7
Dip S/W 6
CN13
CN14
CN22
CN6
CN3
CN5
4
2
CN11
CN9
OFF
ON FND 1
ON ON
1 2 3 4 5 6 1 2 3 4 5 6 7 8
Dip S/W 1 Dip S/W 2
Min Max
Modulating Gas
Valve Adjusting
(Not used)
SW4 SW3
(Service use)
CN23
CN20
3 4 3
CN24
1 2 1
CN2
CN19
CN18
CN17
CN15
CN10
CN1
CN8
45