Help - changing wireless thermostat

[landlordray]

I recently posted on here as I was having problems with my wireless thermostat and receiver, turns out the receiver has developed a fault.

I have decided to change the old set up for a new receiver and wireless thermostat.

However the wiring set up is different on the new unit ( a Honeywell/Center unit EHE0200361 ) the old unit is a Salus ST620RF
Boiler is Worcester Greenstar CDI

Could anyone help me with the wiring please.

I have attached photos of the old and new receivers.

many thanks

 

[ShaunCorbs]

Blue to n
Brown to l
Earths together in a chock block
Black to a (this should be into the com port on the old)
White to b

That’s a bit of a guess as can’t make out the writing

 

[landlordray]

Thanks Shaun,

Do I need to link both the ' L ' terminals together on the new Center box ?

Which writing can you not make out - I will take another photo to clarify if this would help

many thanks

 

[ShaunCorbs]

Thanks Shaun,

Do I need to link both the ' L ' terminals together on the new Center box ?

Which writing can you not make out - I will take another photo to clarify if this would help

many thanks

No just put the wires on the left L

And the back wire there should be writing below the terminal block

 

[landlordray]

Thanks for that.

The writing on the Salus connector block reading left to right is

COM NO Earth Live Neutral

regards

 

[ShaunCorbs]

Thanks for that.

The writing on the Salus connector block reading left to right is

COM NO Earth Live Neutral

regards

My info then is correct

 

[landlordray]

Thank you. Much appreciated

 

[garygvl]

Thank you. Much appreciated

you may find youll struggle to get the two cables into the honeywell as you need two neutrals and two lives which look 1.5 maybe 2.5mm. one drawback with this receiver is very small wiring terminals. black and grey no problem as one cable per terminal. the two browns can go one each into the live terminals, the right hand live is just a common live youd use to link to terminal A if you were not doing no volt switching. just be careful with the two blues into one terminal dont have too much bare cable showing on the neutral and live terminals closest together very easy to short out

 

[landlordray]

Thanks for the info, that is really helpful.
I will bear this in mind when I fit the new relay box

thanks

 

[landlordray]

Just an update.

Fitted the new wireless thermostat and receiver a couple of days ago and everything is working a treat

 

[ShaunCorbs]

Great thanks for the update