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Hi
Looking for some advice....I have just purchased a Nest 3rd Gen and are looking to install myself. I have a Honeywell ST9400C programmer for heating and hot water positioned next to my oil fired Firebird Combi boiler. I also have a Honeywell room stat.
I have photographed the existing wiring:
From researching I need to swap the wires in the programmer as follows:
Honeywell N - Nest Heatlink N
Honeywell L - Nest Heatlink L
Honeywell 4 - Nest Heatlink 3
Honeywell 3 - Nest Hot Water Link 6
My question for the swap is - what do I do with the earth wires? And I also have two wires going into L and N in the programmer - do these need to be joined before they can go into the Nest Heatlink?
In relation to the wall stat:
This currently has a 240V supply which is too much for the Nest Thermostat - how do I get around this with the Nest and can I replace this with the Nest room stat as it is?
Any help is much appreciated for a budding novice electrician learning the ropes
Looking for some advice....I have just purchased a Nest 3rd Gen and are looking to install myself. I have a Honeywell ST9400C programmer for heating and hot water positioned next to my oil fired Firebird Combi boiler. I also have a Honeywell room stat.
I have photographed the existing wiring:
From researching I need to swap the wires in the programmer as follows:
Honeywell N - Nest Heatlink N
Honeywell L - Nest Heatlink L
Honeywell 4 - Nest Heatlink 3
Honeywell 3 - Nest Hot Water Link 6
My question for the swap is - what do I do with the earth wires? And I also have two wires going into L and N in the programmer - do these need to be joined before they can go into the Nest Heatlink?
In relation to the wall stat:
This currently has a 240V supply which is too much for the Nest Thermostat - how do I get around this with the Nest and can I replace this with the Nest room stat as it is?
Any help is much appreciated for a budding novice electrician learning the ropes