Nest Heat Link on a Worcester Bosch 280

[Neil Potter]

I have an old Worcester Bosch 280 combi. Currently it doesn't have a stat connected so the connectors on the board are
N (Unused)
1 & 2 (marked as Room Stat) are jumpered, and I get 240V from 2 when metered out, but nothing from 1 (assumed to be stat switch on)
3 is unused and unmarked
4 is unused and marked Frost Stat.

Would I be right in thinking that I run N on combi to N on the Hive Receiver.
Then remove jumper on combi
Run 2 on combi to L on heat link, and jumper it to common
And finally run a cable from 1 on combi (in theory the stat control) to 3 on heat link

Am I on the right track there?

 

[davesparks]

Make your mind up, is it a hive or a nest?

 

[Neil Potter]

My bad. Nest. All the way. Heat Link. Ta

 

[davesparks]

You talk about running a cable for each connection? Normally you would use a four core cable for this job (L, N, S/L, E)
You have the idea right about what connects where, you will also need a two core cable to the thermostat location unless you wish to use the nest wirelessly in which case you will just need to plug it in somewhere.

Once you have connected it up you must carry out the appropriate tests before switching it back on!