help needed - Part2

[mandm65]

I saw the Valliant cylinder unwrapped and noticed that it came with an expansion vessel.
I also noticed that previous contractor also ordered Altecnic Reflex 24L Robokit Extra, another vessel.
My plumber appears to suggest that previous guy did not know what he was doing as we only need one expansion vessel?
Over to the helpful experts.
cheers

 

[Dean744PiN5]

sounds like your engineer doesn't know what he is on about, the reflex extra is for heating systems which is seperate to the hot water cylinder which will have a vessel suitable for potable water.
So the altecnic is most likely for your heating system.

 

[Dean744PiN5]

also your system boiler only comes with a 10ltr expansion vessel built in which probably wont be adequate for your system, which is why the original engineer probably ordered a additional one.

 

[TCCHeating]

This extra expansion vessel will be to supplement the expansion vessel in your system boiler. As the one in your boiler is only 10 litres it is not sufficient for larger systems.

 

[TCCHeating]

Beat me to it dean

 

[Dan Robinson]

Where do these muppets come from? And how do they stay in business? FFS.

 

[mandm65]

Where do these muppets come from? And how do they stay in business? FFS.

I guess above statement sums it all up! I am getting nervous again, i was quite comfortable with what i read in the part 1 about this muppet but now ????

 

[mandm65]

BTW would it be possible for someone explain where the outdoor sensor should be located (a pic?), bit concerned that he will just place it anywhere he finds it easy.

 

[Dean744PiN5]

ideally a north westerly facing wall and away from direct sunlight.

 

[TCCHeating]

BTW would it be possible for someone explain where the outdoor sensor should be located (a pic?), bit concerned that he will just place it anywhere he finds it easy.

north facing wall, out of direct sunlight

 

[TCCHeating]

Ha, deja vous again! I think deans a quicker typer than me

 

[Dean744PiN5]

or more like great minds think alike

 

[mandm]

Thanks for sorting out the wall guys, hope the muppet gets it right.
Now what do i tell the muppet about the expension vessel, he thinks that expansion vessel inside the boiler is sufficient and we dont need it, is there a harm if insist that he install the expension vessel bought by previous muppet?

 

[mandm65]

Guys any chance of enlightenment?
Cheers

 

[Dean744PiN5]

undersized expansion vessels can lead to premature failure of the expansion vessel itself not cheap considering vaillants internal vessel is over £100, will also put the system under undue stress and increase wear and tear of components and the likely hood of leaks on the system from weak points such as spindles on rad valves, auto air vents ect.
These are just some of the reasons, a good "rule of thumb" is to allow 1ltr for every kw when sizing a veesel.