Immersion heater

[Lofty24]

I have a client who has a very tall cylinder and only an immersion heater to heat it, obviously he only gets the top of the cylinder warm as the thermostat shuts the heat off once that part is hot. can I retro fit a external stat to bypass the immersion stat 1/3 from the bottom of the cylinder?

Lofty

 

[jtsplumbing]

You need to check the length of excising heater, also is it is a duel one ? is it switched on to bath ? as for your question you cant bypass a safety device.

 

[MC_Bob]

No no no no.
Just get the longest element you can fit.
Stratification prevents the bottom heating below a point.

 

[Lofty24]

Brilliant thanks, it already has a 27' element fitted in the top so we will have to fit a new cylinder.

Cheers gents

 

[jtsplumbing]

Brilliant thanks, it already has a 27' element fitted in the top so we will have to fit a new cylinder.

Cheers gents

Why do you need a new cylinder ?? Just fit a 36" immersion heater, some what extreme to change cylinder because of faulty heater !!

 

[Stanios]

I dont understand the problem, if cylinder stat is 1/3rd from the bottom and set to 60c then water temperature should be 60c and above in the remaining 2/3rds of the cylinder. The stat wont shut off just because the top is hot thats the whole point of installing it lower down.

 

[MC_Bob]

It's a top entry immersion if its 27"

 

[Best]

This is one of many advantages of the external Willis immersion heaters - they heat near instantly very hot water to top of cylinder and from there heat to bottom of cylinder - as little or as much as you need & therefore huge savings in electricity bills.

http://www.willis-renewables.com/immersion-how-it-works.htm

 

[Lofty24]

Guys. it's not faulty the cylinder is tall and thin about 5' in height, it's top entry 27" and it will only heat the top as the thermostat shuts off once the top is at the requires temp. there is no external thermostat on the side. I was just wondering if I could fit and external thermostat to heat the cylinder more effectively. there is no other heat source to the cylinder so only the top gets to temp. as it would be against regulations to bypass the thermostat using an external one the cylinder will have to be exchanged. the fella who fitted it should be responsible but he is been elusive to say the least.

 

[Best]

The Willis heater (re my above link) would do a good job & it's return pipe can be connected on a 1/2" drain tapping if your cylinder has one. You can add a drain off on the pipe.

 

[jtsplumbing]

Guys. it's not faulty the cylinder is tall and thin about 5' in height, it's top entry 27" and it will only heat the top as the thermostat shuts off once the top is at the requires temp. there is no external thermostat on the side. I was just wondering if I could fit and external thermostat to heat the cylinder more effectively. there is no other heat source to the cylinder so only the top gets to temp. as it would be against regulations to bypass the thermostat using an external one the cylinder will have to be exchanged. the fella who fitted it should be responsible but he is been elusive to say the least.

First have you removed the heater ? is it a 27" or has someone fitted a short [11" or 14"] one ? 60" cylinder needs 36" heater, do you know how much a replacement cylinder of this size will cost ? if that what you intend doing then get one with twin heaters fitted in the side, one at top one near bottom