Connecting Applications - Low Voltage (Dc) Application Part - Navien LCB700-21RS Installation & Operation Manual

9.4 Connecting Applications - Low Voltage (DC) Application Part

These connections are low voltage DC only and 240 V AC is not to be fitted to these terminals. Doing so may damage the PCB and will not
be covered under warranty.
9.4.1 Connecting the OpenTherm
The boiler is designed to be connected to an OpenTherm. The OpenTherm cables are to be connected to the CONN2 in the low voltage
(DC) application part.
OpenTherm® is an industry standard modulating control available from several control manufacturers and the LCB700 boiler
Note
has an OpenTherm® interface. This enables our modulating range of OpenTherm® room controls to be connected without any
further modifications.
9.4.2 Connecting the Cylinder Stat
The boiler is designed to be connected to a cylinder stat. The thermostat cables are to be connected to the CONH2 in the low voltage (DC)
application part.
44 Connecting Electrical Supplies
Low Voltage (DC)
Application
Part
OpenTherm Protocol
Low Voltage (DC)
Application
Part
Room Controller
Cylinder Stat