9.2 Y Plan Applications
9.2.1 Y Plan with Volt Free Room Stat, Cylinder Stat, and 3 port diverter valve
1
2
3
4
5
6
3 port
diverter
valve
230 VAC
Room Stat
230 VAC
Output
3 port diverter
valve
Cylinder Temp.
Sensor
L
Call
L
E
N
Green/Yellow
Blue
Brown
COM
(N)
DHW
(L)
CH
(L)
1-2: Room Stat or OpenTherm
3-4: Cylinder Stat
Note
Use 3 port diverter valve rated at 230VAC.
* 3 port diverter valve
* 3-way valve
(CH)
CAUTION
Be
-The boiler is supplied for connection the above valves to 230VAC
- Ensure it is connected to the right terminal
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.
CAUTION
(DHW)
(CH)
(DHW)
(CH)
(DHW)
CH(
L
)
COM(
N
)
DHW(
L
)
CH(
L
)
COM(
N
)
DHW(
L
)
(CH)
(DHW)
40 Wiring Examples for Different Applications
Summary of Contents for NCB-20LHWE
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