Low pressure in Vaillant ecotec plus (NOT combi)

[gas4you]

All the 600 series are system boilers.

800 series are the combis

400 series are open vent heat only.

OP refer back to my previous reply and statement about f&E tank

 

[Timmyturtle]

My 618i is heat only boiler ie not a combi
Its the 800 series that are combis

 

[Omlettio]

thanks timmy turtle.


thats what i think i have started to realise during the day. that it needs to be sealed. i guess this would just involve turning off the f/e tank, and pressurising the system?

will be getting another plumber to do this, old one is obviously a cow boy . recommendations for w. london welcome.

 

[simond]

In response to Bamber's question, whilst a 4 series can be open vent it can also be used in a sealed system with the relevant accessories.

 

[Timmyturtle]

Basically you need to cap off ..
The vent pipe (the one that goes over the top of the tank and in)
The cold feed to CH that comes from the lower part of the tank(which may join the vent at some point)
The main feed to the F&E (little tank) ball valve.
The chap who fitted it all should do it really as it is part of the initial installation,but obviously you feel you cant trust him.
Where in W London?

 

[Timmyturtle]

You will need a filling loop to pressurise the system as this too seems to have been omitted

 

[Omlettio]

thanks Timmy. I am based in hammersmith. Looks like at least the work required isn't too much!

thanks for your help everyone!

 

[Siknagudruole]

Hi. I have similar problem with my open vent boiler. I do get an error f22. I did tryed to bleed all radiators, cheched pump and works fine, runned P0 to get air from system not sure what else I could do before I will call to the people who installed boiler. Any suggestions are welcome.