worcester 24i junior non condensing

[clearyclan]

hi all

i am trying to fit a wireless roomstat(honeywell homexpert non programmable volt free) to my worcester combi but worcester only have three connections on the wiring diagram and honeywell require 4. i am sure i just need to link something together, any advice would be welcomed

cheers

 

[ianmcd]

No you dont link anything you need 4 cores from the boiler to the stats receiver unit


L+N of the unit need a L+N supply from your boiler and your boiler will have terminals marked RI and RS if i remember correctly, there might be a link in there if there is remove it and connet to the terminals T1+T2 on the new receiver unit

 

[clearyclan]

cheers ian

my 24i junior does not have 4 supplies at theboiler for the reciever, the boiler terminals are as follows NS,LS AND LR

what in the name of moses is going on

i think i should wire it to control the burners directly but dont want to risk frying the pcb

i think i should link the LS into thefirst switched terminal on the reciever and put the LR from the boiler to the 2cnd switched terminal

the roomstat is a honeywell homexpert THR842DUK

im not going to open the roomstat packaging until i am sure that i can get this to work

cheers

 

[mogget]

Ls is the common live supply. Connect this to both L and T1. Connect Ns to N. Connect T2 to Lr. Remove any link between Ls and Lr.

Ns = Neutral supply
Ls = Live supply
Lr = Live return.

 

[mogget]

Supply to boiler can go in at either receiver or boiler.

 

[clearyclan]

mogget

many thanks, just as i suspected

thanks once again for your kind help, i shall now open the box in the morning

cheers

 

[mogget]

Look what I found in my album - must have answered this question before somewhen!

OP, I hope you got it working, just posting this in case anyone searches in the future.

Untitled

• mogget
• 9 Jun 2009
• 2

 

[clearyclan]

cheers mogget

all done and working now, only took 15 minutes

ta

 

[mogget]

Glad you got it sorted - you can bask in the warmth now