Hive dual Channel, constant calling heat and hot water.

[twicey81]

I had my boiler moved and rewired since then the boiler calls for heat and hot water unless I turn on heating at the hive. Did my Sparky just wire incorrectly. (He has since gone radio silent and will not return calls or text messages to make good.) If it is a case of just swapping the ch on and off wires then I can do it. I have attached pictures of the pwb and hive.

 

[ericmark]

Number 2 should not be used not number 1 so yes there is an error. But sorry can't work out more than that.

 

[ericmark]

In the main, with Y Plan (only plan which uses three contacts) you can work out wiring from the colours of the wires from the motorised valve. I tried to correct my own, in the end marked which cables went where and started from scratch.

I realised one cable changed colour from red, yellow, blue to Brown, Black, grey, so there is a joint I have never found and one core open circuit. These things are hard to find.

This internal diagram of the motorised valve may help. White calls for central heating, Orange to boiler, blue neutral, the grey is an odd one, it is line when DHW is NOT required. The diagram,

shows how DHW comes direct from the tank thermostat, not through the valve. The numbers on the wiring centre are not fixed, it is simply a junction box.

 

[SUNRAY]

I've not wired a hive but i'm assuming they are constructed to be one to one compatible with other programmers for easy replacement.

Generally there is no connexion in 2 (heating off) but there may be in 1 (hw off) as in Erics post

 

[AndyPRK]

So is the heating working as expected ?

Is the water getting way hotter than usual ?

 

[ericmark]

It seems Hive and Wiser are nearly the same, just use a different way to connect OpenTherm. So two channel 3 and 4 are always required. Number 1 DHW off, is used when DHW is not required to motor the valve all the way, I have not seen a plan where number 2 CH off is ever used.

So grey from the motorised valve connects with terminal 1 on the Hive, and also the cylinder thermostat N/O connection. If the grey is not connected at all, then when the central heating runs, the DHW will be heated until the same temperature as CH water, which is often too hot at the taps, but it will work. In the same was as a C Plan does, so my thought is simply to disconnect the wire in 2 and put it in a junction block or tape up so it can touch anything, and see if it works.

 

[CountryFan]

Number 2 should not be used not number 1 so yes there is an error. But sorry can't work out more than that.

This makes no sense. Should it be:

Number 2 should not be used but number 1 so yes there is an error. But sorry can't work out more than that.

 

[EFLImpudence]

I think he meant:

Number 2 should not be used - not number 1 not used.

 

[bernardgreen]