2 channel /single channel hive common

[Rob Denison]

I posted this in electrics UK and thought, that should have been in home automation (Where most of the hive discussion is) so forgive me for repost.

I've bought a single channel and a dual channel hive (hot water plus two heating zones).

I understand that the single channel has a common terminal and that is linked to perm live to connect to the NO NC terminals. The dual channel has live + neutral plus 2 NOs and 2 NCs and the common connection is made internally.

My question is can anyone explain why Hive had an explicit common on the single channel and not on the dual channel? Is there some cost saving or something. Seems weird to make the connection internally on one and explicitly on the other. Like choose one setup guys!

Thanks for any thoughts.

R.

Read more: https://www.diynot.com/diy/threads/2-way-3-way-hive.562971/#ixzz6kygq7dSN

 

[cross thread]

Single channel has voltage free option, 2 channel is 240 v switch as it’s normally powering zone valves etc

 

[ericmark]

The back plate is used for existing programmers and thermostats, the duel channel uses the standard wiring diagram for a programmer, and the single channel uses standard wiring diagram for a thermostat.

I personally think it is daft, as too easy for wrong version to be fitted, but if you try fitting Nest that is not very good either, there is only really enough room for one wire per terminal so it can't replace the wiring centre. Mine is just above a wiring centre but in the flat kitchen looking good not so important.