Replacing a old Honeywell Room Thermostat with a CM907

[Sweevo]

Hi

I'm hoping that someone might be able to help me with a wiring query please.

I've just moved house and I've brought my Honeywell CM907 with me:

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• Sweevo
• 8 Jun 2014
• 1

In my new house, they've got this Thermostat:

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• Sweevo
• 8 Jun 2014
• 2

It's currently wired like this:

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• Sweevo
• 8 Jun 2014
• 1

And the wiring diagram looks like this:

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• Sweevo
• 8 Jun 2014
• 1

From what I can see, these are the connections:

Yellow wire (with black tape) - Terminal 1
Both blue wires - Terminal 2
Yellow wire - Terminal 3

This is the wiring diagram for the CM907:

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• Sweevo
• 8 Jun 2014
• 1

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• Sweevo
• 8 Jun 2014
• 1

Could anyone tell me which wire should go to which terminal on the CM907 please?

I tried what I though it should be, but ended up blowing the fuse, so I'd like someone with more knowledge than me to take a look.

Thanks for your help.

Mark

 

[denso13]

1 to A, 3 to B and terminate the blue safely as not required.

 

[Sweevo]

Thanks very much denso13 - that was a really quick reply!

I've just tried out your suggestion and it works perfectly.

Thank you so much for your help, it was really appreciated.

Kind regards

Mark