CONNECTING A ROOM STAT TO A BRITONY SE80

[brumylad]

just finished drawing out the circuit diag. to sort out how to replace a honeywell 2 port valve with a drayton 2 port valve on an unusual kind of half s-plan system controled with a randall 102 programmer and a room stat.

I'm sure all the manufacturers use different ways of describing the terminals on these control components to discourage installers from using the competition's stuff.

The above was a rant, not part of the reply.

My reply was

I would try 2 wire connection using either combistat terminals 2 and L or 3 and L.

connect boiler PCB to combistat with 2 core cable, thats all u need do. Forget about conecting to mains etc. The stat is double insulated and the instructions suggest it does not even need an earth conection.

 

[PEDANTICVINDICTIVEMAN]

As long as the twwaats at the factory assemble the back plate correctly unlike the one I fitted which wasted me an hour trying to fathom out what was wrong with the damn thing

 

[bonedome22]

the stat must be faulty

i have touched the wires from the boiler terminals together and the boiler fires, in effect creating a link at the pcb

think i will take the stat back and get a volt free digistat

will keep you informed

many thanks to all who have responded to my plea for help

 

[bonedome22]

just to let you all know that i swapped the combistat with a digistat 3 and everything is now woking fine

took just 10 mins to fit and another 20 to set it up

thanks to all for the feed back