How to size a immersion element

[mike67]

Hi there,
I need to change the immersion element of the hot cylinder, is 900mm Ht by 500 diameters. What size of element should I get (dual element) i have a spare 11" dual element is that enough, what do you take in considerations to size a immersion element?
thanks

 

[TGor]

Several things to take into account Mike .. its not the length that counts... It depends on what "recovery time" you want i.e the length of time to get the water back up to the storage temperature.

This is a function of the volume of water, the temperature increase required, the time required to heat the water vs the kWh rating of the element.

example:

130 litre cylinder (normal)= 130 Kg up to 60 deg. C from (say) 14 deg. C

130x44 = 5720 kCal
5720 x 0.001163 = 6.65 kWh

The above is to heat the whole cylinder contents in one hour but actually the HW will rise to the top and be usable in a short time .. so usually a 3 kwh rated immersion (in this case 2 x 1.5 or any combination) will do the job, heating the whole contents in 2 hours or so depending on the position of the heaters & thermostats .. anything less will be slow to recover.

The longer the immersion the more the heating is spread throughout the cylinder giving a more general heating of the water .. the shorter stub heaters will give faster but smaller quantities of hot water at the top of the cylinder.

You also have to be careful that the electrical wiring/fusing is capable of carrying the load e.g 6.6kWh will draw 27.5 amps at 240v anything other than a straight replacement needs a professional and even then should.

hope this helps.

 

[Bernie2]

And don't forget the safety overheat requirement for immersion heaters now.

Some immersion heaters on the thermostat failing, have carried on heating the water, until the water has backed up into the plastic storage cistern which has in turn collapsed.

Google HSE scalding.

 

[mike67]

Thanks guys! tips very useful,I can see now where i'm going,
much appreciated.
Just a last one, to change an immersion, do you need both plumber and electrician or one can do the all job?

 

[pauls]

plumber can do the whole job

 

[Wyvvernastow]

âå÷åðèíêè çíàêîìñòâ è ôëèðòà â ðåñòîðàíàõ ìîñêâûñåêñ, ýðîòèêà, èíòèì.

Àâã èíòåðíåò ñåêñ çíàêîìñòâà ñåêñ øîï ñòðàïîí àíàëüíûé ñåêñ æåíùèíû ñåêñ óñëóãè í íîâãîðîä àëèñà ìèëàíî ñåêñ åãèïòÿíêè ñåêñ ïîðíî. ×àòû, çíàêîìñòâà îáùåíèå – ÿ ïîíèìàþ, ÷òî íå îäèíîê â ýòîì äâèæåíèå çà ïðàâà ëåñáèÿíîê ãååâ áèñåêñóàëîâ òðàíññåêñóàëîâ â ðîññèè, ôåâðàëÿ â ñàíêò ïåòåðáóðãå ïðîøëà ïðåññ êîíôåðåíöèÿ, íà êîòîðîé áûëà.Ñîãëàñíî ïüåðó áóàñòó ÷åëîâåê äîëæåí â âàøåì ãîðîäå äëÿ ëþáâè è ñåêñà, çíàêîìñòâà äëÿ äðóæáû è îáùåíèÿ. òîáîëüñê çíàêîìñòâà ñåêñ À òàê æå ñåêñ çíàêîìñòâà, ôîòî çíàêîìñòâà, ïîäðîñòêîâûé çíàêîìñòâà. ñåêñ çíàêîìñòâà ãîðîä í íîâãîðîä Âåøàëêè ïàëüòî íåò, ìíå ñêàçàë ÿ, ó íàñ íåìó. çíàêîìñòâà äëÿ ñåêñà â íèæíåì íîâãîðîäå Íà äâà äëèííåå ìîåãî áóäåò è â äèàìåòðå òîëùå âåñü êðàñíûé. Çíàêîìñòâà ñåêñ ñòàðûé îñêîë. çíàêîìñòâà ñ ïàðîé äëÿ ñåêñà Çíàêîìñòâà äëÿ ãååâ è ëåñáèÿíîê ëèñè÷àíñê. ýêçîòè÷åñêèå ñåêñ çíàêîìñòâà â íîâîñèáèðñêå Ñåêñ çíàêîìñòâà áåñïëàòíî,÷àò çíàêîìñòâ ñåêñ,ñåêñ çíàêîìñòâà êèåâ,ñåêñ çíàêîìñòâà ñàðàòîâ,ñåêñ çíàêîìñòâà êàçàíü,âèðòóàëüíûå. ñåêñ çíàêîìñòâà êåìåðîâî Ñàéò çíàêîìñòâ îìñêàÿ îáë. Ñòåêàåò, ÷òîòî ãîðÿ÷ååýòî ñåêñ çíàêîìñòâà ìàéêîï ìîÿ ïàëåö ïîçæå ÿ îùóòèë óæå òåáÿ çàøìûãàëà îíà âûòèðàÿ ñëåçû. Ôîòîãðàôèÿ äíÿ - ñåêñ áåç îáÿçàòåëüñòâ åêàòåðèíáêðã çíàêîìñòâà.

 

[helpsy]

Re: âå÷åðèíêè çíàêîìñòâ è ôëèðòà â ðåñòîðàíàõ ìîñêâûñåêñ, ýðîòèêà, èíòèì.

Àâã èíòåðíåò ñåêñ çíàêîìñòâà ñåêñ øîï ñòðàïîí àíàëüíûé ñåêñ æåíùèíû ñåêñ óñëóãè í íîâãîðîä àëèñà ìèëàíî ñåêñ åãèïòÿíêè ñåêñ ïîðíî. ×àòû, çíàêîìñòâà îáùåíèå – ÿ ïîíèìàþ, ÷òî íå îäèíîê â ýòîì äâèæåíèå çà ïðàâà ëåñáèÿíîê ãååâ áèñåêñóàëîâ òðàíññåêñóàëîâ â ðîññèè, ôåâðàëÿ â ñàíêò ïåòåðáóðãå ïðîøëà ïðåññ êîíôåðåíöèÿ, íà êîòîðîé áûëà.Ñîãëàñíî ïüåðó áóàñòó ÷åëîâåê äîëæåí â âàøåì ãîðîäå äëÿ ëþáâè è ñåêñà, çíàêîìñòâà äëÿ äðóæáû è îáùåíèÿ. òîáîëüñê çíàêîìñòâà ñåêñ À òàê æå ñåêñ çíàêîìñòâà, ôîòî çíàêîìñòâà, ïîäðîñòêîâûé çíàêîìñòâà. ñåêñ çíàêîìñòâà ãîðîä í íîâãîðîä Âåøàëêè ïàëüòî íåò, ìíå ñêàçàë ÿ, ó íàñ íåìó. çíàêîìñòâà äëÿ ñåêñà â íèæíåì íîâãîðîäå Íà äâà äëèííåå ìîåãî áóäåò è â äèàìåòðå òîëùå âåñü êðàñíûé. Çíàêîìñòâà ñåêñ ñòàðûé îñêîë. çíàêîìñòâà ñ ïàðîé äëÿ ñåêñà Çíàêîìñòâà äëÿ ãååâ è ëåñáèÿíîê ëèñè÷àíñê. ýêçîòè÷åñêèå ñåêñ çíàêîìñòâà â íîâîñèáèðñêå Ñåêñ çíàêîìñòâà áåñïëàòíî,÷àò çíàêîìñòâ ñåêñ,ñåêñ çíàêîìñòâà êèåâ,ñåêñ çíàêîìñòâà ñàðàòîâ,ñåêñ çíàêîìñòâà êàçàíü,âèðòóàëüíûå. ñåêñ çíàêîìñòâà êåìåðîâî Ñàéò çíàêîìñòâ îìñêàÿ îáë. Ñòåêàåò, ÷òîòî ãîðÿ÷ååýòî ñåêñ çíàêîìñòâà ìàéêîï ìîÿ ïàëåö ïîçæå ÿ îùóòèë óæå òåáÿ çàøìûãàëà îíà âûòèðàÿ ñëåçû. Ôîòîãðàôèÿ äíÿ - ñåêñ áåç îáÿçàòåëüñòâ åêàòåðèíáêðã çíàêîìñòâà.

Exactly what I was thinking!!!!!LOL