PELLAQUA solar heating 12 m2 struggles to provide DHW in summer

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Re: PELLAQUA solar heating 12 m2 struggles to provide DHW in summer




by sicetaitsimple » 20/08/20, 11:51

Macro wrote:It is reputed to be stainless steel


No, according to the instructions it is S235JR (E24 in old francs) for the ball.
S235JR, you should like it! : Lol:
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Re: PELLAQUA solar heating 12 m2 struggles to provide DHW in summer




by sicetaitsimple » 20/08/20, 11:56

Christophe wrote:So 1st thing to do: see what the water looks like by opening the purge valve ... duration of the operation: 2 minutes !!


Pfff ... Must read! Very first post from sylvain:

"We thought that the bottom of the balloon might need to be purged if there was, for example, any sludge, but the water is clear, unloaded ..."
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Re: PELLAQUA solar heating 12 m2 struggles to provide DHW in summer




by Macro » 20/08/20, 12:09

Well ... If it's steel ... I dare to hope that it is ceramic or epoxy coated on the inside ... The installation of an inspection hatch will result in an alteration of the said coating ... With corrosion concerns ... No glop ...
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Re: PELLAQUA solar heating 12 m2 struggles to provide DHW in summer




by Christophe » 20/08/20, 12:15

sicetaitsimple wrote:
Christophe wrote:So 1st thing to do: see what the water looks like by opening the purge valve ... duration of the operation: 2 minutes !!


Pfff ... Must read! Very first post from sylvain:

"We thought that the bottom of the balloon might need to be purged if there was, for example, any sludge, but the water is clear, unloaded ..."


Oops ... definitely I have trouble with this subject !!

Well I'm going to bow out so I think ... I say more bullshit than anything else ... : Mrgreen: : Mrgreen:

ps: I don't know how many liters he pulled but maybe a larger purge should not be considered?
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Re: PELLAQUA solar heating 12 m2 struggles to provide DHW in summer




by Macro » 20/08/20, 12:37

Don't bow out too soon, boss ....
Draining sludge from the bottom of a tank through a 1/2 inch valve is far from an exact science ... believe me ... and ... the bigger the tank ... the bigger the science becomes less exact ...
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Re: PELLAQUA solar heating 12 m2 struggles to provide DHW in summer




by Christophe » 20/08/20, 12:42

Yes I agree with that ... the deposits are not necessarily on the purge valve side (a priori they are on the heating return side ...). So if he only took out a few cl ... that's not a sufficient test.

Personally I would empty at least a hundred L to see ...

Ideally, it is necessary to create turbulence in the dead volume ... i.e. use the purge valve as a filling valve and send a large flow into it ...

And repurge after seeing what it gives ...
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Re: PELLAQUA solar heating 12 m2 struggles to provide DHW in summer




by Macro » 20/08/20, 13:11

I have a vegetable oil heater for the burner of my boiler .... Vertical flasher 60cm in diameter 60cm high ... Standard domed bottom ... a 33/42 valve at the lowest point .... 2 to 3 times per heating season I have to empty it and clean it because the sludge is stored at the bottom .... despite frequent purges ... So as not to be bothered ... It will be necessary that the purge cone has at least the angles of the Egiptian pyramids ..... Which are from memory the maximum angle so that natural materials are stacked without falling ....
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Re: PELLAQUA solar heating 12 m2 struggles to provide DHW in summer




by sylvain52220 » 20/08/20, 13:19

It is true that we perhaps only took out about ten liters and as the water was very clear, we stopped. A larger purge is probably a good idea, in any case it doesn't cost much to try that ...
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Re: PELLAQUA solar heating 12 m2 struggles to provide DHW in summer




by Macro » 20/08/20, 13:27

It will still be necessary to arrive before purging to put this mud suspended in the water .... For me it is necessary to find the inspection hatch ... Empty the 800 liters and visit ....
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Re: PELLAQUA solar heating 12 m2 struggles to provide DHW in summer




by Christophe » 20/08/20, 13:40

For me, without a trap, would have to do that;

a) drain at least 1/3 of the tank (approximately 300L)

b) fill the 300L with water from the network with the valve fully open -> this will create a lot of turbulence and therefore lift any sludge.

c) re-drain a few L to see the water mouth ... if dirty, redo a) and b) several times until the water is "clean enough" then possibly make a complete drain and fill at least 1 time of cleaning water .... in short, it will cost you a few m3 of water ... but it's more econological than a change of balloon!

d) also see if there are sludge dissolving products ... I also have a heated floor (old without BAO) and my heating specialist gave me years ago an anti sludge product: hydrazine (ouch that's rocket fuel !!)... I never put it in the system because I finally forgot, laziness, not the gear ...

I don't know if it's a curative or preventive function ... I don't know if it really works but my heating engineer was a good one, so I guess it does!

ps: be careful to open the drain air intake too ... there must be one above the tank ... or an automatic vent?
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