Y Plan Applications - Navien NCB-20LHWE Installation & Operation Manual

9.2 Y Plan Applications

9.2.1 Y Plan with Volt Free Room Stat, Cylinder Stat, and 3 port diverter valve
(CH)
(CH)
CAUTION
-The boiler is supplied for connection the above valves to 230VAC
- Ensure it is connected to the right terminal
230 VAC
Room Stat
L
Use 3 port diverter valve rated at 230VAC.
Note
CAUTION
Be fore connecting devices to the terminals of the terminal blocks 1 and 2, refer to 8. Connecting Electrical Supplies and ensure that the
rated voltages of the devices match the terminal blocks 1 and 2 spec ations.
40 Wiring Examples for Different Applications
(DHW)
* 3 port diverter valve
CH(L)
COM(N)
DHW(L)
(DHW)
230 VAC 3 port diverter
valve
Output
L N COM
Call E
(N)
Green/Yellow Blue
3 port
diverter
valve
(CH)
(CH)
* 3-way valve
Cylinder Temp.
Sensor
DHW CH
(L)
(L)
Brown
(DHW)
CH(L)
COM(N)
DHW(L)
(DHW)
1-2: Room Stat or OpenTherm
3-4: Cylinder Stat
1
2
3
4
5
6