Hive 2 Multizone Install

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10 Oct 2018
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Hi All,

I setup Hive 2 a while back for downstairs heating and hot water and it works perfectly. This meant that my upstairs rads were still controlled by a danfoss tp5000 programmable room thermostat in the bedroom. Ive been out and bought the multizone kit for hive with the plan to replace the danfoss. I realise the danfoss is battery powered so i cant replace it directly with the hive control unit. Ive managed to wire the hive control unit into the wiring centre so ive got power going to it which is a great start.

My problem: There are 2 wires at the danfoss tp5000 a brown connected to COM and a brown/sleeve connected to NO Theres also a grey which is not blanked off by a piece of temrinal connector (i think!). I presumed that i'd be able to trace these back to the wiring centre - disconnect them and connect them instead to the COM and NO on the Hive unit (pins 1 + 3) to switch the heating for upstairs - this doesnt seem to work though - any ideas? Can provide pics if required
 
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There are 2 wires at the danfoss tp5000 a brown connected to COM and a brown/sleeve connected to NO
As you have correctly identified, they are the switching wires and could indeed be re-routed to.
the COM and NO on the Hive unit (pins 1 + 3)

So, the wiring sounds OK to me, assuming that you are: 1) Using a 'Single Channel' version of the Hive for upstairs, and 2) have traced the two wires back to their origin correctly.

Does it work if you switch the upstairs heating on manually using the button on the upstairs receiver? If it does, then wiring is OK. If not, there is a problem somewhere.

I'm not that brilliant with understanding the software set up, maybe the whole thing will need setting up again from scratch now that you have converted it from a single zone to multizone. Hive tech support can help here.

I realise the Danfoss is battery powered so I can't replace it directly with the hive control unit.
You could, if you used the unused wire as a neutral connection.
 
I think i may have traced the wires back incorrectly - i've grabbed my tone tester from work today to double check them - i`m correct in thinking the danfoss is nothing more clever than a switch between the NO and COM dependent on the temperature reading? Theorectially if I touched the 2 cables together it should turn the upstairs valve on?
 
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