Hive install Query - Combi w/tank

[robj20]

If you have a hot water tank, you don't have a combi boiler you just have a system boiler (also known as heat-only, hence the H in the model designator).

The hardwires will likely go to the back of the current stats - those wires would have to be pulled back to the wiring centre which is probably in your airing cupboard with the tank and put into the wireless receivers instead, with the actual Hive thermostat going on the wall were the previous stats were, but talking wirelessly now.

If you currently have two 'stats, then you will likely have 3 zone valves in the same hot water tank cupboard, which will mean you have an "S-plan" system. Google around for "hive s-plan" and you'll probably get a few hits from plumbing and DIY forums. I'm not sure if Hive can do S-plan with multiple zones, so that's what you'll have to forage for in your Googling.

If you have to go with Hive, I think you'll have to get one that does heating and hot water (NOT COMBI) and comes with a Hub, and then get another one that does heating alone with receiver (but without hub), but as above, I'm not sure if Hive supports S-plan with multi-zone.

Just to correct you, it's perfectly possible to have a combi boiler and a hot water tank, don't see it often though. You can implement some rather clever systems that way.

 

[Mysterae_]

This is a nice diagram - what did you use to make it? Excel, or a more tailored app?

Thanks, I use Corel Draw X7 for my diagrams. I simplified the wiring diagram for a functional version:

 

[squerble]

Thanks, I use Corel Draw X7 for my diagrams. I simplified the wiring diagram for a functional version:

Thanks. Looks even better with the colours added - bit more obvious at a quick glance.