All combination boilers should have an area thermostat fitted. Without one, you will see no means for the atmosphere heat to be managed.
Volt free terminals
Some boilers have actually volt-free terminals. While the title indicates, they are perhaps not attached to any energy supply, nor must any energy be reproduced for them. These terminals are labelled A and B, however boiler manufacturers may have used alternative markings in the diagram
Once the two terminals are linked together, the boiler functions. You should definitely connected, the boiler will not run. Consequently, a 2 cable thermostat is required. These don’t have any charged power, and wiring is really a 2 core cable amongst the boiler and thermostat.
When boilers are first set up, there is certainly usually a connection between the two thermoregulator terminals to permit evaluation of this boiler before a thermoregulator is wired in. (more…)