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Ive just had a new valiant 28 pro boiler

Ive just had a new valiant 28 pro boiler fitted.The problem im experinceing is the hot water is not as hot as it should be. The installer explained to me that the bolier gives a rise of 35 degrees at max flow,which i have also read in the manual. When the tap is fully open it is flowing at 9 litres a minute at a temperature of 43 degrees.The incoming water temp was 8 degrees.The boilers max flow rate is 11.5 litres,because its only flowing at 9 litres shoudnt the temp be higher.

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The faster the flow the low the temp , the slower the flow the hotter the temp

Posted on Feb 06, 2010

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  • paulcarew Feb 07, 2010

    you can google your boiler and down load a manual or falling that if it is still unber warranty valliant might send one of there own techs out to you ,



    but the faster the flow through the heat excahger the cooler the temp so may be your water valve is not fully opening to obtain full flow or the heat senser is not working correctly on the hot water side .......

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