All combination boilers should thermostat have a room fitted. Without one, you will have no method for the atmosphere heat to be managed.
Volt free terminals
Some boilers have actually volt-free terminals. Given that true title recommends, they are perhaps maybe perhaps not linked to any energy supply, nor must any power be used for them. Into the diagram, these terminals are labelled A and B, but boiler manufacturers could have used alternate markings
If the two terminals are linked together, the boiler functions. When maybe not linked, the boiler doesn’t run. Consequently, a 2 wire thermoregulator is required. These would not have any power, and wiring is a 2 core cable between your boiler and thermostat.
Whenever boilers are first set up, there clearly was typically a match up between the 2 thermoregulator terminals allowing evaluating of this boiler before a thermoregulator is wired in. This website website link must certanly be eliminated plus the thermoregulator connected on it’s spot – otherwise the heating will run constantly. This can prove very costly, and certainly will end in the house being exceptionally hot.
Care Connecting mains voltage into the thermoregulator terminals with this style of boiler will often cause severe and damage that is expensive the boiler.
Mains voltage 2 cable thermostat
A mains are required by these boilers voltage thermoregulator, that could have a few wires. The boiler could have a terminal which activates the boiler whenever mains voltage is put on it, typically labelled SL or line that is switched.
2 cable thermostat
A 2 wire thermostat is linked between line in addition to line that is switched in the boiler. Whenever temperature is needed, the thermoregulator links those two cables together, using the complete mains voltage towards the line terminal that is switched.