Suggested wiring diagram for Nest Heatlink below

The wiring diagram below refers to units fitted with either GT155 or GD131 control boards.  For older or newer units fitted with other pcbs you will need to refer to their circuit diagrams for the correct connections.

Attention 

WARNING - Any mains wiring should be carried out by a competent person.  Diagram refer to GT155 or GD131 pcbs only.

The diagram above is a suggestion only it is up to the individual to check that what they are doing is correct.  On this basis I cannot accept any responsibility for any mishaps.

© Copyright Murray Martin