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8.3 Connecting the Switched Live (230V)
The boiler is designed to be connected to a switched live. The
switched live cables are to be connected to terminals 1 (AC Live
Out) and 2 (Switched Live In) of the boiler terminal strip.
1
2
8.4 Connecting the Room Stat or
OpenTherm
The boiler is designed to be connected to a Room Stat (volt free)
or OpenTherm. The Room Stat or OpenTherm cables are to be
connected to terminals 5 and 6 of the boiler terminal strip.
1
2
Detail View
3
4
5
6
Detail View
3
4
5
6
8.5 Connecting the Outdoor Temperature
Sensor
The boiler is designed to be able to function with an outdoor
temperature sensor. The sensor cables are to be connected to
terminals 3 and 4 of the boiler terminal strip.
1
2
Detail View
8.6 OpenTherm® Protocol
OpenTherm® is an industry standard modulating control
available from several control manufacturers and the
NCB300 boiler has an OpenTherm® interface. This enables
our modulating range of OpenTherm® room controls to be
connected without any further modifications.
1
2
3
4
5
6
OpenTherm® Protocol
NCB300
3
4
5
6
Room Controller
Connecting Electrical Supplies
45
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