Boiler kp11 not working well...help?

[michmich]

Hello everyone.
A friend had a kp11 boiler installed 8 years ago.
The company that installed it went bankrupt.
The installation never worked properly.
No company wants to repair!
This boiler is supposed to produce DHW and heating via radiators.
My father who was a heating engineer had gone to see the installation, before his death he had immediately seen that the installation had been connected upside down!
What does that mean?
I have no notion of heating (in any case very little) but will be able to modify if someone explained to me what to do.

Better yet, could a charitable soul email me a typical diagram of a boiler-radiator-hot water tank installation?

I thank you in advance

[Doudou22]

Hello everyone.
A friend had a kp11 boiler installed 8 years ago.
The company that installed it went bankrupt.
The installation never worked properly.
No company wants to repair!
This boiler is supposed to produce DHW and heating via radiators.
My father who was a heating engineer had gone to see the installation, before his death he had immediately seen that the installation had been connected upside down!
What does that mean?
I have no notion of heating (in any case very little) but will be able to modify if someone explained to me what to do.

Better yet, could a charitable soul email me a typical diagram of a boiler-radiator-hot water tank installation?

I thank you in advance

Hello please contact me on Facebook Nicolas Dubois with a ponast boiler