Navien LCB700-21RS Installation & Operation Manual page 49

9.6.2 Connecting the Junction Box Connection (Y Plan)
The boiler is designed to be connected to a junction box (Y Plan). The Junction box cables are connected to the terminals 1-5 of the
CONM4 in the AC application part and the CONZ3 (POWER OUT) in the AC power line part.
Room Stat
2 1
1 2 3 4
Cylinder Stat
1
3
C
2
5 6 7 8 9
Boiler
Terminal
Block
CH_ON
1
DHW_ON
2
DHW_OFF
3
Switched Live
4
L
5
L
1
N
2
PE
3
3-Port Mid
Position
Zone Valve
Wiring
10
Centre
AC Application and
AC Power Line Parts
CH_ON
DHW_ON
DHW_OFF
Switched
Live
L
L
N
PE
Connecting Electrical Supplies 49