Hive - Should I need to do HW & CH, or should CH do nothing??

[Chris M]

Hi Fellas, I've had a sniff around the forum and can't find a conclusive answer..

I've had Hive installed a couple of years ago and I'm starting to question if it's wired correctly or if it's just how my system works since I now know a few people who have it installed.

When I call CH, I have to also put on HW separately. Calling HW only does not turn on CH you'd expect. I'm not certain how the system worked pre Hive as we had it installed the week we moved in.

I've tried to read up on fully pumped vs gravity vs part pumped/ Y plan without HW off and the like but I'm no clearer on my set up. Below is a picture of the receiver wiring that shows there are 5 wires, but they're into 3 positions.



At the time the wife told me the installer said he'd had loads of trouble making it work but had got there in the end..

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[Chris M]

If it helps, the boiler is a greenstar 30CDI

 

[Chris M]

If it helps, the boiler is a greenstar 30CDI

 

[Leesparkykent]

System boiler with hot water cylinder?

 

[diditrain]

We will need to know what type of set up, you have? S plan/Yplan or whatever.

 

[Leesparkykent]

A pic of the cylinder cupboard would be good.

 

[Chris M]

Hi guys, missus has banned me from banging around the kids bedrooms till the morning!

(There a blue pump in there under the floor.

One thing that I couldn't identify is a black plastic box that appears to just sit 'on' a pipe that's got mains power to it with the word Range on it! (Took a pic of that earlier)

I'll kick proper pics in the morning.

Thanks all

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[Chris M]

Hi all,

Airing cupboard pics attached..
The pipe going in to the roof isn't connected - kind of looks like a sealed system looking at it but I don't know much!

Under the raised floor there are 2 pumps which I photo if needed but need to do a little dismantling - one is older. I've only caught the newer looking one of them running but we do have 3 power showers each with own pump so not a clue if one is 'support'?

I also notice when in the garage (near boiler) that boiler pressure was low (in the red) so assumed I could top up easily but there appears to be no loop and a sticker with 'direct cylinder' written on it!

(And in one of the colder rooms in an extension appears to have a cold outflow pipe despite rad getting hot but one thing at a time!!)

Thanks again.

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[diditrain]

What did you have before you had the hive fitted and how did it work previously?

 

[Chris M]

Hi, there was just a large time clock there but we whipped it out not long after moving in over 2 years ago so don't remember to be honest :-/

I'm curious as I've never seen a diagram which groups 3 permanent lives (but that's limited to Google in the last week or so :-D).

I'm thinking I'm screwed for unless I pay someone to come and have a look first hand.. I'm comfortable with Electrics generally, but don't want to fry anything in the boiler by guessing!

 

[diditrain]

One of the lives into the hive receiver backplate will be permanent from your fused connection unit, the other two will be going out to other parts of your system. One of them to a wiring centre at a guess and the other who knows without seeing it.
Terminal 3 from your backplate will be the switched live from the receiver for hot water on and terminal 4 will be heating on switched live from the receiver.

 

[ferg]

I'm having a bit of trouble interpreting your post.

You should have to call for HW separately from CH.

 

[Chris M]

I'm having a bit of trouble interpreting your post.

You should have to call for HW separately from CH.

Really? Perhaps I've been lucky but I've never had to do this prior to this property, and feels very inefficient. (I've never had a combi, always stored water).

Are you saying it's normal to have to always separately schedule my hot water just in case the temperature drops such that a demand on heating is required? Surely I'm heating water for no purpose?

Just to be clear, if I don't schedule hot water and ge heating comes on it just pumps cold water around.

 

[Chris M]

And just add more weirdness which might help...

If I have a full tank of hot water that could do a bath, if I turn the heating on the radiators go immediately hot and use all the hot water which means no bath for 15 minutes till the system has heated more!

 

[davesparks]

It sounds like it's wired up as a gravity system, hot water fires the boiler and heating operates a pump.

I'd say you'll need a decent plumber and electrician to work out what bodgery has been done and how to fix it.