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You set the high limit stat to 65 degrees? Is there another dial for actual temperature rather than the high limit temperature?
Discuss Scratching my head over immersion heater! in the Electrical Forum area at ElectriciansForums.net
Nope, the wiring is secure as I double checked everything.
Don’t get me started with the plumber, that’s a whole different topic on its own!
I haven’t got a picture of the gubbins but have a link the thermal stat :
BBSC0131 Megaflo Thermostat | Home Heating Spares
New BBSC0131 Megaflo Thermostat. BBSC0131 Megaflo Thermostat combined thermostat and cut-out for the new Megaflo Boxwww.homeheatingspares.co.uk
I‘ve done everything I can electrically, maybe there’s a build up of limescale In the tank?, but the plumber would of seen that and commented on it?
If the plumber had changed the element and the stat then it would have been a problem unless he did not know what he was doing.where the element was caked in lime scale
Not linked electrically, I’m unsure on the plumbing side though.Is the cylinder linked to the boiler as in a hot water heating oil?
According to the above attached installer manual it says the element stat is a combined control and overheat stat in the same module. Only the control temperature can be adjusted and it has a range from 10C to 72C.You set the high limit stat to 65 degrees? Is there another dial for actual temperature rather than the high limit temperature?
Just a quick update guys,
I’ve just heard back from my client who has informed me that according to her new plumber the thermostat was set too high resulting in nuisance tripping.
I had followed the instructions and set the stat to roughly 65 degrees, I say roughly as there were no markings on the bloody thing!
Oh well, lesson learnt I suppose?
Earlier posts said that there wasn't a stat!Just a quick update guys,
I’ve just heard back from my client who has informed me that according to her new plumber the thermostat was set too high resulting in nuisance tripping.
I had followed the instructions and set the stat to roughly 65 degrees, I say roughly as there were no markings on the bloody thing!
Oh well, lesson learnt I suppose?
think he meant that there wasn't a tank stat, as opposed to the stat in the element.Earlier posts said that there wasn't a stat!
Oh OK sorry OP my mistake.think he meant that there wasn't a tank stat, as opposed to the stat in the element.
Shouldn't you have G3 accreditation to work on unvented hot water systems? Or did I waste my time and money?
hey, nope it isn’t that stat that works with the tank. I’ve posted a link above to the correct one.Ref: # 23: I think I may have worked out what is wrong. I believe the OP may be mistaken about how the electric immersion element is meant to be wired in and controlled.
If I have interpreted correctly what the OP has described, the electric element currently does not have a push on rod thermostat with cutout - the direct heating system. Instead, the element is being controlled by the upper thermostat and cutout which are meant for the indirect system.
If one reads the installation instructions at #23, it describes how to connect up the electric immersion heater with its own stat and cutout, and the indirect stat and cutout to control a boiler. There is a drawing on page 15 and component list which indicates the electric element is meant to have its own stat and cutout. Someone then - the plumber ? - may have discovered the electric element's stat and cutout were defective and co-opted the indirect stat and cut-out instead.
I doubt that the indirect stat and cut-out have the required current rating for the electric element - but may be wrong on this count. Anyway, the indirect stat and cut-out are not designed to control properly and safely the electric element.
What needs to be ordered is the correct stat and cutout for the electric element and it then fitted and wired up as in Fig 7 Page 9. Note Fig 7 shows the upper stat and cutout are not wired to the electric element.
The correct part has this number 95 612 026. See:
Heatrae Sadia - Megaflo Thermostat 11" Rod Type TSE/TSR 95612026 95612599 - Specialists in plumbing & heating spares - https://www.unventedcomponentseurope.com/heatrae-sadia-megaflo-thermostat-11-rod-type-tse-tsr-95612026-95612599.html?utm_source=Google%20Shopping&utm_campaign=Copy%20Unvented%20Components%20Europe&utm_medium=cpc&utm_term=3590&gclid=CjwKCAjwwMn1BRAUEiwAZ_jnEpIuG47ccjQMP8v4i0VP-hIt-MKRx3PP-nXk4_7wkz4vpjQY8pAV6hoCTzEQAvD_BwE
ETTradesmen - hope this helps.
It threw me a bit, it looks like the new cylinders have a pair of matching stat/cutout pairs, one for indirect control the other for the immersion. Previous models had a stat/cutout for indirect and a plug on stat/cutout for the immersion.Ref: # 23: I think I may have worked out what is wrong. I believe the OP may be mistaken about how the electric immersion element is meant to be wired in and controlled.
Reply to Scratching my head over immersion heater! in the Electrical Forum area at ElectriciansForums.net
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