Twin immersion same circuit?

[zaceverett]

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

 

[SJD]

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?

 

[mainline]

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

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.

 

[zaceverett]

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.

No just a single tariff. The tank is 250l horizontal which is why I guess they supply with two immersion.

 

[zaceverett]

No just a single tariff. The tank is 250l horizontal which is why I guess they supply with two immersion.

The tank is indirect so will be normally heated via boiler but we will use the immersion as a boost when we have lots more people waiting for showers etc

 

[bennie]

Do you need both immersion? If not just connect one.

 

[zaceverett]

Do you need both immersion? If not just connect one.

Good point, I'm guessing that if I wanted to use it without the boiler in case of breakdown then one immersion wouldn't be man enough.

 

[bennie]

One would do the job but if your planning on using both at the same time you'll have to either upgrade the cable and protective device or run a new circuit for the second immersion.

 

[mainline]

No just a single tariff. The tank is 250l horizontal which is why I guess they supply with two immersion.

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.

 

[zaceverett]

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.

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