Help! - Noisy central heating system – not heating water well ……

[gmartine]

If it's a 60's house chances are you don't have the water pressure and flow rate to be able to utilise an unvented cylinder anyway.

An EV is usually based on 10% system volume'ish so an 8 litre EV would do for a small system.

 

[Garzie]

have ordered a 12litre EV and install kit to err on the safe side - plan to install it in the AC above the HW tank - directly into the lines that currently go up the wall into the loft to the expansion tank.

was very reasonable - here -

Altecnic - ERES 12 Litre Heating Expansion Vessel & Sealed System Kit ER-12LTVESS

Altecnic - ERES 12 Litre Heating Expansion Vessel & Sealed System Kit ER-12LTVESS

www.unventedcomponentseurope.com

do i need anything else ?

anything i should watch out for ?

 

[gmartine]

What lines, your F/E pipes? The EV ideally needs to go on the return side of your system.

https://www.altecnic.co.uk/wp/wp-content/uploads/resource-files/Pressure_Vessel_Instructions_IOM.pdf

 

[Garzie]

yep - the F/E pipes

i see the instructions say preferably on the return side - but doesn't say MUST - so i m hoping that is not essential

as i understand it as long as the system volume is able to expand unhindered into the vessel - then it will work correctly - and since no air can get sucked in via the vessel - that should solve the air issue

no?

 

[gmartine]

Here's some instructions that say "must" be on the return and no obstruction between it and the system so I wouldn't locate it before the three port as you propose. Also the EV postioned there is far more likely to fail because of the higher water temp.

https://www.vip-ltd.co.uk/Expansion/Expansion_Vessels/22_0330/Cal-Pro%20Expansion%20Vessel%20Instructions.pdf

 

[ShaunCorbs]

It’s best for it to go onto the return but your fine if you put it on the old tank supply pipe etc

 

[Garzie]

It’s best for it to go onto the return but your fine if you put it on the old tank supply pipe etc

Cheers - i was hoping so