Navien KDB-203 STC, Instruction Manual, Page: 9 / 36

1. Connect firmly the room controller wire (2 Line) from the boiler, to the room controller port in the back
of the room controller.
2. Connect firmly the telephone wire to the telephone port in the back side of the room controller.
3. Fix the room controller firmly on the wall, using the room controller bracket or socket.
4. Wiring
9
Fixing & Wiring
To the socket on wall On the wall
controller telephone