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Thank you simond

Final Note on the subject. Never having liked combi boilers for the very reasons detailed in this thread, the potterton puma 80 (output 24kW) will be replaced with a system boiler (output 15-18kW) since the heating load for the house is only 6-7kW.A small superduty cylinder that complies with...

The design flow rate for a 15mm sink tap is 0.15litres/second or 9litres/min. Minimum flow rate through the same tap is 0.1litres/second or 6litres/minute Potterton Puma 80 - design flow rate for D.H.W. = 9.8litres/minute So the boiler should be able to cope, that is unless it's mid winter...

Think you need glasses Lets have it correct, this is what I said "I ride a bike" Clever person ar'nt you.......grow up

With the help of my glasses, what I wrote is what I have said all along, suggest you go and read the manual or shut up. :lol: :lol:

Go read the manual on the Potterton Puma 80 my friend - page 19 Commissioning Item 3.6 D.H.W. Flow Rate. ( Should it be desired to set the appliance to give a Higher Temperature Rise............) :roll: :roll: :roll: Think you should lie down :lol: :lol:

So what you are agreeing to is that, when hot water is required at a sink adjacent to the "boiler" the tap should NOT be turned to the FULLY on position, because the boiler can't produce that much hot water.............go have another think my friend, you live in a different world :shock: :shock:

You are clever, did you think that one out all by yourself :?: :lol: :lol: Another clever comment, is that your stock comment when you can't sort a boiler problem. "Sorry sir you turned the tap to fully open, the boiler can't cope with that" :lol: :lol: I ride a bike :lol: :lol...

Lets leave it at that eh 8)

I think anyone could read the thread and learn from it, and I am sure that you would be only to willing answer any queries from another novice :lol:

Book closed, boiler working :lol: :lol:

In my book it's a fault If the flow rate is above 9.8l/min, it's a fix No, as I indicated previous, read that part of the post again. Think there is a little difference there

The fault - poor hot water temperature when on hot water only. The fix - reduce the flow rate by altering the MFR. The boiler is 11 year old, we moved in to the house 18months ago, most of the adjacent houses have had boiler changes, which proves there must have been a problem with the boiler...

(Answer) Yes :D :D

Oh I am very sorry about that,I'm not trying to educate anyone (statement) Who are you trying to educate :?: :?: (question)

Who is trying to educate who :shock:

No that was a statement of fact, not a question I will ignore that comment, because it just shows how immature you are. I think the term, was the royal "we" have all the manuals, have you read them? (that is a question)

The DHW flow rate of the puma 80 is listed as nominal at 9.8litres/min, this flow rate will give a nominal temperature rise of 35*C which in turn means that the DHW at the tap is hotter in summer than it is in winter, since there will be a reduction in temperature of the incoming MCW in winter...

And a Happy Easter to you Softus. Have fun 8) 8)