Solar yield too low; how to adjust three flat collectors

Just the question alone is already funny, as it shows considerable ignorance and being out of touch with reality! Anyone who suspects a three-phase connection from these power specifications clearly demonstrates the value of the assumptions made by "hobby experts."

So I am out of touch with reality because I am not an expert in heating pumps and therefore do not know from which power ratings these things come with a three-phase connection... Aha... Okay... Such a black-and-white view certainly makes life much easier...

I never claimed to be an expert in pumps. I only know that our pumps, which we use, already have a three-phase connection from under 100 watts. That does not always have to do only with the power. There are other reasons why the power should be distributed over all 3 phases...

If a self-proclaimed expert, instead of helping or keeping out of it, has nothing better to do than to more or less directly point out the questioner's supposed mistakes, then that is simply pathetic.

Best regards Micha

.... I only know that our pumps, which we use already have a three-phase connection from under 100 watts....

Your "special pumps" unfortunately have nothing to do with real TGA building services technology at all!!! Hence apparently the completely irrelevant posts! Seriously embarrassing!

....If a self-proclaimed expert ....

Whether someone "self-proclaims" here is for the interested reader to decide for themselves.

Regards.

Your "special pumps" unfortunately have nothing whatsoever to do with real TGA building services!!!

But - these are all standard heating pumps from well-known manufacturers. Nothing special. Just because I *am allowed* to connect up to 4.6 kVA single-phase doesn’t mean it actually makes sense.

But it doesn’t matter. I would suggest we let this topic rest here – it’s off-topic anyway and doesn’t help.

Best regards Micha

Hello €uro,

I would be interested in the result!

The supplier installed a storage tank that is too large for the house (400 l for 2 peoples); the planner/plumbing company/Vaillant should definitely have noticed this – as a result, the solar system, simply put, is "overwhelmed", furthermore, my clients are "buying" a recurring legionella test by the health department (mandatory since 10/2011), which of course costs money. The idiots also failed to install an opening for this test, so the storage tank would have to be dismantled every time...! I just shake my head... Our master heating engineer is currently writing a report, and then I will see how to proceed, or whom to step on toes! Vaillant would certainly not be my favorite of the three conversation partners... I should explain to them once the meaning of the word "customer"-"service"... it is below all sxx, as I currently have to experience first-hand... For one of our new builds, Vaillant will definitely not be used anymore. I had already discussed this with every plumbing company who even mentioned this supplier before this "experience". Now the deal is finally closed! Best regards

The provider installed an oversized storage tank for the house (400 l for 2 peoples); the planner/plumber/Vaillant should have noticed this – as a result, the solar system is – simply put – "overwhelmed", additionally my clients are "buying" themselves a recurring legionella inspection by the health department (mandatory since 10/2011), which of course costs money. The idiots also failed to install an opening for this inspection, so the storage tank would have to be removed every time...!

2 people? But single- and two-family houses are generally exempt from the legionella inspection, aren't they?

Excerpt from the Drinking Water Ordinance 2001 after the amendment on 1.11.2011:

Single- and two-family houses are by definition not subject to the obligation to test for legionella according to the Drinking Water Ordinance 2001.

Hello,

2 people? But single- and two-family houses are generally exempt from the legionella test, aren't they?
Excerpt from the Drinking Water Ordinance 2001 after the amendment on 1.11.2011:

Another typical case of VRI, because

"comprehensive new regulations also apply to the parameter “Legionella”. A technical action value (100 legionella per 100 milliliters of drinking water) is introduced and, if necessary, an on-site inspection of the affected drinking water installation and a risk analysis are prescribed.

Basically, examinations for legionella in drinking water heating systems in the drinking water installation are provided for (cf. § 9 para. 8, § 13 para. 5, § 14 para. 3, Annex 3 Part II and Annex 4 Part II letter b Drinking Water Ordinance 2011). Affected are all entrepreneurs and other holders of a drinking water installation in which there is a large system for drinking water heating according to the definition of the generally accepted rules of technology, insofar as drinking water is supplied from this as part of a public or commercial activity.

The examination obligation exists for systems that contain, for example, showers or other facilities in which drinking water is nebulized (thus not for hand washbasins in the restaurant toilet). Large systems for drinking water heating are storage drinking water heaters or central flow drinking water heaters
with a content of more than 400 l and/or 3 l in each pipe between the outlet of the drinking water heater and the point of use (cf. DVGW worksheet W 551)."


Kind regards