Sealed system on a open flue boiler

[Rizme]

Can an open vented heating sytem be converted to a sealed system by adding an expansion vessel on a open flue boiler. As the boiler does not have a over run heat stat. Will this be right. Any advice would really appreciate. Thanks in advance.

 

[bengasman]

Depends on the boiler and the quality of pipes and rads.
Risky to diy.

 

[diamondgas]

Check the manufacturers instructions, it'll let you know whether it can be installed on a sealed system or not! What is the make and model of the boiler?
As 'bengasman' says, the system has to be taken into consideration also. The older the system the less likely it'll enjoy being put under additional pressure!

 

[Billy Bob Bob]

as both above what boiler is it?it must have a high limit stat

 

[Blackcatgas]

Alot of boilers had a separate kit to convert them to run unvented.

 

[Rizme]

Boiler is Potterton Kingfisher.

 

[stevetheplumber]

im sure there was a kit for kingfishers if its still available who knows usually they were ahigh limit stat that interupted the thermocouple remember it needs a prv as well as a vessel
pump over run isnt needed

 

[Billy Bob Bob]

KINGFISHER 2 RS100 Ttb - Gas Appliance Spares (Preston) Ltd they dont show one here but worth ringing and asking with your boilers gc number also try here [DLMURL="http://www.partsarena.com/baxi/"]PartsArena[/DLMURL]

 

[Rizme]

What if one come's across this on a Landlord check, would this be classified as AR or NCS

 

[Billy Bob Bob]

What if one come's across this on a Landlord check, would this be classified as AR or NCS

id if no high limit stat fitted

 

[mfgs]

id if no high limit stat fitted

Its AR if no PRV is fitted but has an overheat stat, and NCS if it has a PRV but no overheat stat. Any appliance not designed to be installed on a sealed system is AR

 

[desrob]

What if one come's across this on a Landlord check, would this be classified as AR or NCS

i come across interupted thermocouples .bridged out all the time, which of course is a no no .

 

[GerrythePlumber]

Can't be ID. Because it's not

 

[Billy Bob Bob]

Its AR if no PRV is fitted but has an overheat stat, and NCS if it has a PRV but no overheat stat. Any appliance not designed to be installed on a sealed system is AR

i look at this very simply if no high limit stat that boiler will run dry before the boiler thermostat kicks in,so run out of water you have a potential bomb on your hands i stick by what i said its ID

 

[mfgs]

Well regulations classify it otherwise. Even by what you are saying its AR not ID. There is a risk of it causing harm, its not actually causing any harm at the moment. It is definately not ID if its working as normal with just a risk of danger in a certain set of circumstances.

 

[Billy Bob Bob]

Well regulations classify it otherwise. Even by what you are saying its AR not ID. There is a risk of it causing harm, its not actually causing any harm at the moment. It is definately not ID if its working as normal with just a risk of danger in a certain set of circumstances.

ar or id its going off anyway

 

[GerrythePlumber]

1983 I think it was. I went to house on an emergency. They said there was steam coming from the boiler. When I got there I found a Potterton Neataheat spewing out steam, as the heat exchanger was split right down the middle, still firing away like a good un. The installer had failed to put the thermostat phial in. My point is, a thermostat will kick in if its in the right place. High limit or not. Hence not ID. ID if left with no stat.