Electric central heating- Heatrea Sadia???

[bentleds]

I've found myself in a whole new world.
Anybody give me an update on Heatrea Sadia Central heating. (Heatrae Sadia). I've just had a call out to a flat that "had a problem" with the electric shower. However the MCB that blows is the 60A one in the switch room to the block of flats not the 80A on the CU in the flat. I guess the shower and the newly installed "electric central heating" draw more than 60A. Also why would you change from storage heaters to this type of central heating is it more cost effective? I know gas CE is more cost effective but to be honest this is the first time I've come across electric CE. Please let me know if you have any experience of these or any idea how much power they draw, any problems they have.

Every day is a school day!

 

[jaydee81]

think they do a 6kw 9kw and 11kw version problem is like you say if the boiler and the shower are both on the fuse is blowing due to overload you can get a relay which stops both being used at the same time ie shuts down the boiler if the shower is turned on

 

[Des 56]

You may need to fit a priority switch
Here is one by the forum sponser Garo Priority Shower Board (Choose Priority)| MeteorElectrical.com

 

[Richard]

60a protecting the submain and 80a in the cu in the flat? apologies in advance but are you sure that's not just the main switch? Otherwise that fusing arrangement doesn't make any sense to me

 

[bentleds]

Yep Richard, I think the arrangement is wrong. I guess this is how it happened. They must have done the survey and saw an 80amp rcd for that half of the CU and thought that would do nicely, not aware of the 60amp mcb in the switch room feeding the whole flat.

 

[jaydee81]

not another one who thinks an rcd gives you overload protection

 

[Richard]

They must have done the survey and saw an 80amp rcd for that half of the CU and thought that would do nicely, not aware of the 60amp mcb in the switch room feeding the whole flat.

What makes you think that that RCD will provide overload protection? Sounds to me like the set up is indeed correct.

As for your problem, you have too greater maximum demand.

 

[bentleds]

Richard, not sure what the point is that you are making? Please expand please

 

[bentleds]

Yep exactly. I think that whoever looked at CU assumed that they were safe at 80 amp, not aware what may happen elsewhere e.g. main incoming fuse, or in this case a mcb in the switch room...... Oh, you were suggesting I thought rcd gives you overload protection........

 

[Des 56]

However the MCB that blows is the 60A one in the switch room to the block of flats not the 80A on the CU in the flat.

The above was part of the opening post


What set up is this consumer unit that contains this 80 amp mcb ?
confusion is being generated

 

[bentleds]

Good point Des, sorry sloppy terminology. I was second guessing what the central heating guy had thought. He saw 80 amp rcd and thought that half of ther CU could take 80 amps. He may well have been more intelligent than that. The original post was fishing for some first hand experience of Heatrea Sadia Central heating, your recommendation looks like a solution, I've passed it onto the client with the suggestion that the folks that put the central heating in should fix it at their expense. Still have no idea why they took out the storage heaters on eco7 and have this system on regular tariff electric. Its going to cost them an arm and a leg to run....... isn't it?