Vaillant atmoTEC plus

[Gabriel a]

Hello friends! 

I'm experiencing problems with my Vaillant heating system, I got an f22 error (low water pressure) and I cannot find the filling loop since there are no valves attached to it.

I'll appreciate if you could help me out

 

[Sharpend]

Have you one of these? 

https://www.vaillant.de/documents/download/308318

Page 9, 10

 

[Geoff1946]

A filling loop can be anywhere, not necessarily near the boiler. Look anywhere the mains water supply and heating circuits come close.  My filling loop used to be under the kitchen sink, whilst the boiler was in the porch.