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A customer has h/w problem. Whenever h/w is run on the first floor it runs to a trickle and that is with one tap open.
It's a large 15 yr old house with 3 baths, shower room and 5 toilets with basins. The loft has been converted and has its own shower room run from its own boiler and no issue with that.
The system is run by 2 potterton 80 boilers and megaflo cylinder which seems to be sufficient for the outlets. There was a grundfos 15 50 pump before the h/w inlet on the cylinder which we thought to be faulty. I've changed that to an alpha2 25 60 and put new pump valves on too as one wasn't shutting properly. Problem is still there and new pump is showing max flow through it at 0.3m[SUP]3[/SUP]/hrs when tap running and 0.1m[SUP]3[/SUP]/hr when idle.
Also, the expansion vessel is at 2 bar. There is h/w coming from cylinder but obviously not enough. As the thread says, i may be missing something so any help/advice would be appreciated.
I've attached some pics of the pipework around cylinder.
Thanks
It's a large 15 yr old house with 3 baths, shower room and 5 toilets with basins. The loft has been converted and has its own shower room run from its own boiler and no issue with that.
The system is run by 2 potterton 80 boilers and megaflo cylinder which seems to be sufficient for the outlets. There was a grundfos 15 50 pump before the h/w inlet on the cylinder which we thought to be faulty. I've changed that to an alpha2 25 60 and put new pump valves on too as one wasn't shutting properly. Problem is still there and new pump is showing max flow through it at 0.3m[SUP]3[/SUP]/hrs when tap running and 0.1m[SUP]3[/SUP]/hr when idle.
Also, the expansion vessel is at 2 bar. There is h/w coming from cylinder but obviously not enough. As the thread says, i may be missing something so any help/advice would be appreciated.
I've attached some pics of the pipework around cylinder.
Thanks