Dual Immersion

[RmBo_0]

Hi,

I'm quoting to wire up a dual immersion. The plan is to change the existing 16a mcb to a 32a rcbo and running 4mm cable to an enclosure with 2x 16a mcbs but my question is on a timer for it. Can I get a 32a timer or would it just be cheaper to put 2 on for each immersion.

Oh it's not a e7.

Thanks.

 

[bigbaddave]

An immersion with excess of 15litres has to be on a dedication circuit.. is it a chow on running a feed from the board to each heater?

 

[RmBo_0]

There isn't any spare ways in the consumer unit only the original 16a immersion circuit.

 

[Octopus]

An immersion with excess of 15litres has to be on a dedication circuit.. is it a chow on running a feed from the board to each heater?

It would be a dedicated circuit, just with 2 heaters in a single tank.

 

[bigbaddave]

It would be a dedicated circuit, just with 2 heaters in a single tank.

I either need to drink less or invest in glasses....

 

[FrankUK]

Hi,

I'm quoting to wire up a dual immersion. The plan is to change the existing 16a mcb to a 32a rcbo and running 4mm cable to an enclosure with 2x 16a mcbs but my question is on a timer for it. Can I get a 32a timer or would it just be cheaper to put 2 on for each immersion.

Oh it's not a e7.

Thanks.

Just think how you want to control them..

A single timer (rated at 32A or over - i.e. contactor) on the sub main (feeding the 2x 16a mcb's) will switch both heaters at the same time. If you want 1 to switch at different times, then you need to install 2x timers, each rated at 16A+ on the final circuits.

 

[RmBo_0]

Well I would of preferred a din contactor timer but looking at the costs it would be cheaper with 2 16a timers so going to quote for that.

 

[Megavolt]

Why not just get a e7 time clock that's what there made for and will control both elements. One is your normal operating element and ones the boost

 

[Megavolt]

Electronic Economy 7 Timer

 

[Megavolt]

Ignore me just re read it total dummy

- - - Updated - - -

Ignore me just re read it total dummy

- - - Updated - - -

Ignore me just re read it total dummy

 

[RmBo_0]

I had a look at horstmann e7 controller but they are only rated at 13a so would need one for each heater. It was around £50 as well.

 

[Megavolt]

Is it a bit tank are both going to be needed at the same time or is one a back up

 

[RmBo_0]

No didn't have a look at the volume of the tank but it wasn't that big. Not sure why they want both but that's what the customer wants. Probably best giving him a quote for having just one wired aswell so he can see the difference.

 

[Megavolt]

Ok what about a couple of din rail Contactors controlled by a twin Chanel time clock relabelled up

 

[RmBo_0]

I'd like to do it that way but again I don't think will get any cheaper than having a couple of mcb's and a 16a timer for each.

Thanks for your help anyway

 

[Leshark]

Sound like you need to be sure of the customers reasoning behind having 2, that would make your decision for you, if a backup or need to run at differing times 2 times/mcbs would be best

 

[RmBo_0]

Think you may have replied to the wrong thread mate.

 

[sedgy34]

I've done this before all you need to do is install 1 20amp radial and install a booster time clock this will switch between the 2 easy peasy

 

[RmBo_0]

Ah right that would be a lot easier and cost effective. Just thought you needed an e7 supply for them.

 

[eganelectrical]

Usually the econ 7 dual supply feeds 2 x ccu. Some just have one ccu and turn their water tanks to econ 7 buy sending a 20a radial to a fused spur in tank cupboard and out if there to econ 7 timer clock and out of the clock to the tank, one feed one timer and another boost. I have seen them with 2 separate stats on the tank!!
Like this ...

http://www.tlc-direct.co.uk/Technical/DataSheets/Horstmann/ECON7DOUBLE.gif