I would have at least connected up the coil with the plate in parallel, so that if the DHW pump or plate fails, turning three valves will bring in the coil, and no down time in DHW. It is there so use it. That can be done in a few hours costing about £15.
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You need one of those electronic things.... :-)
What's wrong with an undersink heater? Much neater.
His need to be over the sink. He can they put flowers on top of them.
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Thanks. Very soft water here (Southish Dartmoor) so that shouldn't be a problem. Not a hint of scale in the kettle after nearly 3 years. Lots of mud though and they are digging up the street again to try to fix it )-: (at least I hope thats why they are digging up the street again )
Gordon
All mains pressure appliances musty have strainers on the cold supply.
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I was kind of inviting that response from Drevil...
Or as there's an LPG boiler, probably on a bombolino, a gas-powered generator.
Owain
Ideal Homes 1951 I think...
Are those the cabers you spend all your time tossing?
Owain
Have you been on the pop already?
If you have a heat exchanging coil within the higher part of the body of the store then there is no need for a pump. Stored water systems may need a greater diameter coil bore depending on the "head" of the storage tank. How hard is the local water? The coil may have internal scaling problems in a hard water area but a routine acid flush will prevent problems for some considerable time. Suitably located valving will ease access to do this.
I read somewhere that as long as the temperature of the water is 60 C or below, that scale will not precipiate of the water much.
This would explain why kettle and immersion elements scale up, but the inside of how water pipes don't suffer nearly so badly.
Anyway came aross some links on scaling and descalers:
cheers, Pete.
This is a wind-up right??
The lower the temperature the better. Plate heat exchangers are more efficient than immersed coils. Rule of thumb: A plate will drop the temp about 10C. So, 70C store temp then the plate will give 60C. A coil is about 20C. So, with a coil the store temp needs to be 20C higher. 80C store temp, 60 DHW temp. Having a larger store, using a plate and a lower temperature helps to reduce scale vastly.
Many combi's have scale reduction, in that the DHW temp never gets above 60C
Pete, they do work. Mine does.
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No, I dodge them.
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Lord Hall, do you mean that web site is wrong and all those impressive and highly professional companies do not use the scale reducers?
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Using modern microprocessors and signal processing techniques, the Scalewatcher? ENiGMA produces a complex, modulating frequency waveform (which in terms of magnetic strength is insignificant). When this is applied to the water, the energy induced in the water is sufficient to cause the premature precipitation of the calcium. Because precipitation occurs in the bulk of the water, the crystals seed onto other naturally occurring ions in the water, such as zinc, copper, iron etc. Their size and shape bear no physical resemblance to those formed in untreated water and they remain in suspension until discharged to drain.
I don't think any more needs to be said.
You can't have worked at all of them.
Lord Hall, many of those names spring to mind.
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This is just a quick thanks for all the replies. I've not had to time to fully absorb every nuance but they all help with my decision making. If I get time I'll try to reply in detail to some of the Q's.
OH and Drivel, I take it you are incable of reading.
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