Glow-Worm Ultimate2 30C and the Hive Receiver wiring.

[Billbo45]

Hi all
I have a Glow-Worm Ultimate 30c combi boiler and there are only two wires to the room thermostat.
I am about to wire in a Hive Receiver which shows it needs four wires.
I am pretty sure the existing wires are simply for ON/OFF and use 24v.
And the Receiver needs 240v to power it.
Am I right in assuming that the wires to the Receiver are as follows...

N- Permanent 240v Neutral connection.
L- Permanent 240v Live Connection.
1- Common, unused.
2- Heating OFF so one of the two existing wires from the existing thermostat.
3- Heating ON the remaining of the two existing wires from the existing thermostat.


Or... are terminal 1, the common and terminal 3, heating ON the two I use for the existing thermostat wires?

Any help would be appreciated.

 

[stem]

Second guess is correct. You want 'common' and 'heating on' as the thermostat switch wires. Terminals 1 and 3.

The heating off terminal becomes live when the heating erm... goes off so you won't want that!

 

[Billbo45]

Thanks Stem.
Ill let you know how it goes tomorrow.

 

[ianmcd]

Do not link L&1 as advised in some other posts ,you dont need it and if you do actually have 24v switching you will damage the boiler PCB