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- 27 Apr 2010
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- 27
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sorry for my late reply i was away for the weekend there. i have no room stat fitted. my pump connections are 28mm. i have turned my pump down to mid setting and my rads all seem to be heating, i timed the cycle once earlier it fired for 1 minute exactly to bring up to temp, then remained off for just over 8 minutes. what does that sound like to you guys? maybe my pump was too powerfull (unaware of its size) think its a wilo top it has black insulation around pump body. i know 1 minute on is very short, so maybe if i go down to the 1.00 nozzle and lose that 5.5kw i might be ok. 8 minutes odd being off seems quite good to me for a house with lots of heat loss. if i needed to go a nozzle size down can i just put the0.85 one in? my boiler manual shows the nozzle for the riello rdb 2 which is the next burner down. cheers guys