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Twin immersion same circuit?

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Discuss Twin immersion same circuit? in the UK Electrical Forum area at ElectriciansForums.net

zaceverett

zaceverett

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I've purchased a horizontal unvented cylinder that has come with 2 immersion heaters.

I was hoping to use the same circuit the my existing tank used.

What's the best way to wire in for 2 immersions? Upgrade the 2.5mm radial?

Any suggestions welcome
 
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If you only have one (presumably) 16A circuit, you can get a controller that connect two elements, but only allows one to be switched on at any one time. Typically used so the main lower element is put on at an off-peak time (over night) and the higher boost element when you need to top up the heat in the tank.

Edit: Or is this a large tank designed to use both elements together?
 
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zaceverett said:
I've purchased a horizontal unvented cylinder that has come with 2 immersion heaters.

I was hoping to use the same circuit the my existing tank used.

What's the best way to wire in for 2 immersions? Upgrade the 2.5mm radial?

Any suggestions welcome
Click to expand...
Do you have a two tariff supply ?

You could use a Bath / Sink mode switch using your existing wiring.

It may be beneficial to install two circuits if you have a peak and off-peak consumer unit.
 
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zaceverett said:
No just a single tariff. The tank is 250l horizontal which is why I guess they supply with two immersion.
Click to expand...
They should never really be run together, the intention of having 2 elements is that the top element keeps the top part of the tank hot for use when you aren't needing lots of hot water.

The easiest way is to fit a bath/sink switch or as already said a controller.
 
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mainline said:
They should never really be run together, the intention of having 2 elements is that the top element keeps the top part of the tank hot for use when you aren't needing lots of hot water.

The easiest way is to fit a bath/sink switch or as already said a controller.
Click to expand...
I'm a bit confused here...There is no top or bottom?? It's a horizontal tank and they're both at the same level
 
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zaceverett said:
I'm a bit confused here...There is no top or bottom?? It's a horizontal tank and they're both at the same level
Click to expand...
Ahh different type to what i had in my head, so your one is not economy 7 type but a dual element which will heat the whole tank whichever element is used but will obviously do it quicker.




[ElectriciansForums.net] Twin immersion same circuit?


Unless you want faster heating of the tank, then just leave it on the one element, otherwise you will have to run a new circuit to run both at the same time.
 
Last edited:
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Seen plenty of horizontal cylinders for electric wet CH systems but never indirect cylinders, just took a look they are quite big holds quite a few litres of water.
 
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7029 dave said:
Seen plenty of horizontal cylinders for electric wet CH systems but never indirect cylinders, just took a look they are quite big holds quite a few litres of water.
Click to expand...
It's full weight is 300kg, Ive had a structural engineer draw up the plans for a platform in the loft. Wouldn't want to put that kind of weight on my ceiling joists. Guess it would be ok if I had a support wall underneath but I haven't.

Thanks for the suggestions, looks like beefing up the cable is the best option at the moment.
 
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littlespark said:
Where did you buy it from?

Won’t they have suggestions of how it should be connected up
Click to expand...
Got it from Screwfix. A g3 plumber will be connecting it up.
As it won't be a straight swap for the immersion looks like I'll be getting an electrician in. I wanted to check with the professionals on here what options were available.

Just wondering if I could have another consumer consumer unit linked off the main one just for boiler/pump immersion 1 and immersion 2??
 
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zaceverett said:
Got it from Screwfix. A g3 plumber will be connecting it up.
As it won't be a straight swap for the immersion looks like I'll be getting an electrician in. I wanted to check with the professionals on here what options were available.

Just wondering if I could have another consumer consumer unit linked off the main one just for boiler/pump immersion 1 and immersion 2??
Click to expand...
Yes you could.

Can you give the model of tank you have ?
 
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