Combi Boiler Room Thermostat Wiring

A wireless thermostat is a digital device that can tell you the temperature of its surroundings.

Combi boiler room thermostat wiring.

It does this using electronic sensors and can communicate with the boiler to provide the ideal room temperature for yourself. The boiler will have a terminal which activates the boiler when mains voltage is applied to it typically labelled sl or switched line. Combination boilers and connecting thermostats to them including hive and nest. A 2 wire thermostat is connected between line and the switched line terminal on the boiler.

This guide shows you how to wire up a thermostat watch this and other related films here. The boiler only operates if both the programmer and thermostat are on. These boilers require a mains voltage thermostat which can have 2 or 3 wires. This is my video on how to wire a nest learning thermostat with a combi boiler it s super simple once you know the set up.

The thermostats can keep the room within less than one degree of the preset temperature. The choice will depend on the boiler. Also covers volt free contacts and why mains voltage must not be connected t. For those boilers which have a programmer or timer built in the only other device required is a room thermostat.

This is the same switching arrangement however here a 3 wire thermostat is used which requires a neutral connection. There are two main types 2 wire and 3 wire. Here are all the products i used. Here the neutral is shown from the boiler however it could be provided via the programmer if this is more convenient.