Immersion heaters ??

[eagleeye]

I have a job to do tomorrow where a unvented direct hot water cylinder was installed just over a year ago. Job came through as no hot water. Anyway I have been there and both immersions are scaled up and faulty so gonna replace them and fit a limescale inhibitor. At the moment its got both immetsions off the same 16amp circuit. Yes I know thats not right. This is in a flat where she has storage heaters. On the cu she has 2 main switches. One side doing econ 7 for the heaters and the other side doing the lights, power and immersions. Im going to run another supply from the cu to supply bottom immersion so she gets it cheap rate and the existing circuit will supply top immersion via a timer. Perfect as she has a full tank of hot water in the morning for bath and at night the top half of tank hot water for sink washing up and stuff (hence the timer so she can set what time its on and off). Question is if she decides she wants a bath at night or something then she will need to heat the full cylinder so how whats the best way to boast the bottom immersion if its only off of ecom 7??

 

[KFH]

Have a look at E7Q Economy 7 Immersion Heater Timer - Segment it needs both an off peak and a peak supply connected.

 

[snowhead]

You need a dual supply boost control

similar to this

Horstmann Electronic 7 Immersion Heater Control | eBay

 

[yellowvanman]

generally the upper immersion should be Ok for 1 bath, as long as it not at the very top and only 9" long

 

[snowhead]

And we won't mention G3.

Damn, we did.

 

[eagleeye]

Cheers snowhead thats excatly what I thought but couldnt get no sense out of medlock electrical. . Ta mate. Just got to try and get on for tomorrow now

 

[telectrix]

if the things are scaling up that quick, buy the non corroding versions. cost a bit more, but they last in hard water.

 

[Carlosfandango]

I've often seen two immersions off one supply using an E7 quartz controller. One immersion is timed to come on at off peak times and the other is a boost. The controller only allows one to work at a time.

 

[sparkyphil1]

I have a job to do tomorrow where a unvented direct hot water cylinder was installed just over a year ago. Job came through as no hot water. Anyway I have been there and both immersions are scaled up and faulty so gonna replace them and fit a limescale inhibitor. At the moment its got both immetsions off the same 16amp circuit. Yes I know thats not right. This is in a flat where she has storage heaters. On the cu she has 2 main switches. One side doing econ 7 for the heaters and the other side doing the lights, power and immersions. Im going to run another supply from the cu to supply bottom immersion so she gets it cheap rate and the existing circuit will supply top immersion via a timer. Perfect as she has a full tank of hot water in the morning for bath and at night the top half of tank hot water for sink washing up and stuff (hence the timer so she can set what time its on and off). Question is if she decides she wants a bath at night or something then she will need to heat the full cylinder so how whats the best way to boast the bottom immersion if its only off of ecom 7??

Mate unvented water heaters req a fully trained engineer converse in unvented systems as they could be potentially like a bomb if pressured wrong etc dont get me wrong rewire and put eco 7 timers in no prob but please think again about changing the elements , is poss insurance claim if things later go wrong !