Honeywell cm927 fitting - wiring check

[NickB_99]

Hello all

Am planning to fit a wireless thermostat to my combi boiler.
Model is a Honeywell cm927.

Receiver part

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• NickB_99
• 15 Oct 2013
• 1

Boiler connections

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• NickB_99
• 15 Oct 2013
• 1

Was planning on running two lengths of cable between the boiler and receiver.
This seems to save disturbing the FCU, that's already wired in to L,E and N on the boiler.

Using cable one, was planning to take L and N by joining at the boiler connection and connecting to the (left hand) L and N in the receiver. On the receiver diagram it seems to show two little lines just against these two.

Remove the yellow wire link from between boiler-1 and boiler-2 connections.
For cable two for the switching connections, connect boiler-2 to A in the receiver and boiler-1 to B in the receiver.

Hope this description makes sense.
Feedback appreciated if this acceptable.

 

[Dan Robinson]

Cable 1

Left L and N to boiler L & N. You should also connect the earth to the earth terminal in the boiler so the flex is protected.

Remove yellow link and connect cable 2 between those and A & B.

 

[NickB_99]

You should also connect the earth to the earth terminal in the boiler so the flex is protected

Good point. Will connect the earth also at the boiler.