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New Grant Vortex Condencing Boiler Taking ages to Heat System?

Postby o'catain » Tue Sep 22, 2015 7:03 pm

Hi, I have just installed a new Grant vortex condensing boiler, boilerhouse type 90/120. the Boiler went into action first go and heated the water very quick, the pump is pushing in to the system but it is finding it difficult to even heat one rad. I emptied the system and cleaned all the rads before commissioning, air vented etc. am I missing something or does it take a long while to heat up the whole system.
Can anyone shed light on my problem.
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