Greenstar Condensing Boiler 24 Ri big enough for job?

[centralheatking]

Hi, I've measured the output and it's averaging at 1 litre per 10 seconds. That's with nothing else being used. Is this low?

6 litres per min is above the statutory min. Your utility have to supply but it won’t be enough to much more than one use around the house at one time. There are totally legal booster pumps but when your neighbours all get one it’s back to square one. You might try installing a new supply from the utility to your house, but if it’s a long way it’s a lot of digging and has to be inspected. Centralheatking

 

[Keentolearn]

The cylinder, does this have a cold tank sat on top?

 

[moonlight]

Sounds like you may have an unvented cylinder, or a thermal store. You may need someone who is qualified to look at this problem. Pictures would be useful. Thanks.

 

[davidw]

Sounds like you may have an unvented cylinder, or a thermal store. You may need someone who is qualified to look at this problem. Pictures would be useful. Thanks.

Here's a photo of the cylinder.

 

[Keentolearn]

See how the cylinder has a small section at the top, that’s a cold water storage cistern, Known in industry as “fortic”. That’ll be your problem, check to see how quickly water is replenished as hot water is Drawn off.

 

[EvilDrPorkChop]

See how the cylinder has a small section at the top, that’s a cold water storage cistern, Known in industry as “fortic”. That’ll be your problem, check to see how quickly water is replenished as hot water is Drawn off.

It’s not a combination cylinder it’s a thermal store. The tank is supplying the heating side of the system.

The strainer is probably blocked on the incoming main, where the expansion vessel is. It’s not clear if there’s a PRV on the incoming main on the photo but if there is I’d check that this is operating correctly too.

 

[davidw]

It’s not a combination cylinder it’s a thermal store. The tank is supplying the heating side of the system.

The strainer is probably blocked on the incoming main, where the expansion vessel is. It’s not clear if there’s a PRV on the incoming main on the photo but if there is I’d check that this is operating correctly too.

here are a few more photos. Thank you for all the advice - it's much appreciated.

 

[davidw]

I've moved this thread to one under a better heading. Thanks for all the advice so far!!

 

[ShaunCorbs]

...... Closed ......