Solar yield too low; how to adjust three flat collectors

Hello €uro,

The system was not installed/planned by the builder, but someone here made money from it and therefore is obliged to deliver flawless work! ...So now the builder is supposed to tinker with it himself based on forum remote diagnosis?

Dear €uro - sometimes, in my opinion, you are guided by one-dimensional thinking

It is neither about the builder taking over the work of the plumbing company nor the manufacturer; certainly not about tinkering with anything!

This thread is about – as Micha correctly stated – on the one hand collecting ideas from builders to solve the problem; sometimes it really is just minor issues. On the other hand, it is also about involving Vaillant – which, represented by one of their technicians, has so far not been very successful – in the responsibility. If this does not succeed, what you have very rightly recognized will happen – the builder is left to fend for himself and that cannot and must not be!

On Monday, I will try my luck again with Vaillant in KR; I have no intention of giving up or continuing to watch this theater. However, this time under the worst possible conditions for this provider. Yesterday, I personally had an encounter with the technical customer service regarding a private matter. What can I tell you? A technician also left my place without doing anything; he would have preferred me to buy a new boiler. It’s fun when the burner does not do what it was designed for at these temperatures

Another confirmation of our decision not to work professionally with this manufacturer.

Best regards

Hello,

Everyone views this from a completely different perspective based on their position

Quite cryptic

If you had read my posts a bit more thoroughly, you would have noticed that this is probably a hydraulic problem!

I have already understood that; tomorrow a friend who is an installation and heating technician will get in touch and see if your assumption is correct.

That I have to defend the manufacturer, especially this one, I never thought! Once again, it is not a Vaillant (manufacturer problem)!!!!!!!!!!!!!

You don’t need to scream Exactly because of reactions like that, I wrote that you think in a one-dimensional way in my opinion.

I KNOW that it is not a manufacturer problem in the classical sense! BUT I think Vaillant has a moral obligation to help find a solution. Especially because their licensed companies and even their own technicians are simply too stupid :-(

If some subcontractor of a general contractor cannot handle it and cobbles something together according to his own judgment, he has to guarantee and be liable for it, not the manufacturer of a device/system!

If even the general contractor can’t get the “horse going” despite a lawyer’s very clear demand – what then? Should the client wait as long as someone moves in this game of Mikado and thereby loses? Not everything can always be clearly distinguished in black and white; the gray zone is wide.

What you suggest – which is also correct, don’t misunderstand me – requires all parties to want to cooperate. But the laws/judgments of this country take quite a long time before one of its representatives applies them in reality and leads to a result.

Why not? One should get informed beforehand and not complain afterward. Modern technology requires sufficient planning/dimensioning, that’s just the way it is. Whoever thinks that a general contractor wants to do good to the client (their wallet) should consider what kind of society they live in.

You can ask questions. By the way, a simple gas condensing boiler with solar domestic hot water production is not rocket science. And – it was planned/dimensioned exactly. What causes the error are – as always – human shortcomings. And again – the manufacturer is very much also in moral duty; after all, their licensed partners caused this mess.

Yep, energy savings up to 80 %

and the world is flat.

Your problem is absolutely not comparable to that of the OP, let alone put in the same pot!

Not in the problem itself for sure – but definitely in the development/application of solutions!

Best regards

I never thought I would have to defend a manufacturer, especially this one! Once again, it is not a Vaillant (manufacturer) problem!!!!!!!!!!!!!

and the world is flat.

Hello everyone
just briefly off topic...
If I may briefly quote the best author in the (*world of discs*):

"'Multiple exclamation marks,' he went on, shaking his head, 'are a Sure sign of a diseased mind.'"
-- in "Eric(!Faust)"
(In the official translation then:
"Three exclamation marks," he continued, shaking his head. "Sure sign of a sick mind.")
[Terry Pratchett]

Ah, simply wonderful
Sorry, no offense!

back to the topic:

What the "rotating field" at 220 V could help with, - well, you can collect opinions.

(1) The voltage in Germany was raised to 230V a long, long time ago, and
(2) I asked whether the pump is operated at 230 V or with 3 phases (=400V). Or is it not clear to you what a rotating field is?? A rotating field only exists in a three-phase network when more than one phase is used (normally - I will leave aside cases where a quasi-rotating field is created with a capacitor). Hence my question about the power supply...

If any subcontractor of a general contractor cannot handle it and improvises something at their own discretion, he must guarantee and be liable for it, not the manufacturer of a device/system!

I KNOW that it is not a manufacturer problem in the classic sense! BUT I think that Vaillant has a moral obligation to assist in the solution

That always depends on the company philosophy: when my customers call me because they have a problem, I always help immediately and gladly. Regardless of whether we as the manufacturer made a mistake or not. The "guilty party" can be sought after the solution has been found. And then you can certainly talk about costs and liability. But first we always solve the problem.
In this regard, my employer has a great attitude - and it would simply be nice if other companies thought the same way...

Best regards
Micha

Hello Micha,

Faust is always good Also nice: "One may grow old, but who grows wise?"

... The "guilty" party can certainly still be searched for after the solution is found. And then we can also gladly talk about costs and liability. But first, the problem is always solved with us.

I couldn’t put it better

Best regards

Oh, simply wonderful

So true!

....(2) I asked whether the pump is operated with 230 V or with 3 phases (=400V).

The question alone is already funny, as it shows considerable ignorance and naivety! Anyone who suspects a three-phase connection based on these power specifications clearly demonstrates the value of assumptions made by "hobby experts".

v.g

...I have already noted that; tomorrow a friend who is an installer and heating technician will get in touch and see if your assumption is correct.

I would be interested in the result!

Best regards