What is correct wiring for Hive 2 please?

[Prcoop]

Hi I picked up a Hive 2 multi zone kit yesterday. I currently have a Drayton LP522 programmer controlling hot water and 2 heating zones, upstairs and down.

Current wiring is fixed live and neutral, earth tethered and grey to 3 and black to 4. The wiring diagram on back of the drayton programmer and the hive receiver both seem the same to me so I thought would be a simple case of connecting the hive to existing backplate. I certainly have hub/receiver and thermostat all talking to each other but it's not talking to the boiler if thats the right phrase.

2nd part of the question. I hadn't realised there would be a 2nd single channel receiver in the multi zone kit, I had assumed that the 2nd thermostat would just connect to the initial dual channel receiver. How does that connect to the system?

I disconnected the downstairs thermostat, but not upstairs as was just trying to get one zone working.

Worcester boiler with pressurised hot tank in roof if that makes any difference to the wiring.

Do I give up and call in the pro's or is it a simple fix?

Thanks Pete

 

[poshram]

don't take my advice as gospel, but it sounds like your whole system is the same as mine. where does the grey(3) and black (4) wires go to? do they control the power to turn on your CH and HW via your 2/3 motorised values?

ideally you need to work out your current wiring in terms of how you get switched power to your motor values and boiler IMHO

 

[stem]

Presently the thermostatic switching of your two heating zones is done by two wired room thermostats. The black wire from terminal 4 of the Drayton, will supply both thermostats, and then each thermostat will operate one of the heating zones.

With the Hive, because the temperature control switching is done inside the Hive receiver (instead of at the thermostats) a separate switching wire is required for each zone. Therefore:

Receiver one should be a 'dual channel' unit, and terminal 3 will control the hot water (exactly the same as with the Drayton) and terminal 4 will control only one of the heating zones
Receiver two will then be a 'single channel' unit and will control only the second heating zone via terminal 3

To install them, you would need to access the existing wiring centre, remove the existing wired thermostats, and then reconfigure the wiring of the heating zones to the two Hive receivers.

 

[stem]

I disconnected the downstairs thermostat

If by disconnecting the thermostat you mean simply removing the wires, then that would have effectively left an 'open circuit' so it wouldn't work. When the thermostat is removed, a bridge needs to be inserted between the wires that went to the thermostat 'live' and 'switched live' connections (but not any neutral).

Do I give up and call in the pro's or is it a simple fix?

If it had been a single zone and hot water, it would have been a fairly simple modification, however, the addition of a second zone does complicate it somewhat.

 

[Prcoop]

Hi Stem

Thanks very much for the posts. I'll be honest with you, I took the cover off the wiring centre after your initial post and my eyes glazed over. Could trace wires back to boiler and the valves but far to busy in there and way beyond what I'm capable or prepared to attempt, A BG engineer I shall call. Was worth having a crack but I'll either mess it up or burn the house down. Either way the missus will kill me!

Pete

 

[stem]

Sounds like a sensible way forward.