Central Heating

Vaillant ecoTEC831/CORROSiON/ANOMALiES with entrance of AiR in the HEATiNG SYSTEM

Anonymous user 28/02/2024 - 2.55 PM

1*FACT*: CORROSiON INSiDE THE CONDENSATiON PASSAGE of FLU: After 2/3 months of installation has been a continuos dripping of orangish from a joint the flu on the top of the boiler. When flu has been dismantled a large corrosion area was inside the flu, dripping inside the boiler and outside the flu. After a couple of intervention the external drip has stop, but very likely the installer conceal the internal one. QUESTiONS on 1*FACT*: 1)Which area of the chambers in the boiler will be affected by this contaminated water? 2)Which side effects can cause? 3)Corrosion extended to other areas and decanting of metal particles? 4)Who is to be held responsible for the defective flu(suggested?Vaillant decline responsability 2*FACT*: CONTiNUOS ENTRANCE OF AIR in the HEATiNG SYSTEM: With the start of the cold temperatures i started using the heating. There has NEVER been loss of pressure in the radiators. (We can meter this exactly has we have installed gauges on top of most radiators). However i noticed large amount of air sitting in the only radiator that has not been changed, and large portion of air running trough the system making a loudy whistles. Air has been flushed twice in 2months,on the second occasion the plumber increased the pressure to 1.5ATM that reach 2.5/3ATM during operation. With more pressure inside the system the air temporary stopped his entrance for a longer while, but after a month from the pressure increase of the plumber, and the 3 days of absence the air again started his entrance WiTH NO LOSS in PRESSURE. COMMENT:The remedy of increase the pressure in the radiators has been very likely ordered by Vaillant as the correct operating pressure should be no more of 1.5ATM(all the time) QUESTiONS on 2*FACT*: 1)Where is likely this air coming from? 2)Why the pressure remain stable after the air entrance? 3)Opinion about my comment on the 2*FACT*? 4)The contaminated water from the flu can be related to this intrusive air? THANK YOU VERY MUCH for SUPPORT W.H.