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Here's what happened today. Overnight house cooled to 16.5 degrees Room stat set to 19 degrees. It's on the landing and when it hits 19 all rooms are about 20 which I find comfortable. Target flow set to 75 Pump 100% Comfort (constant pump) on Boiler Load 14 Kw 8:14 I switched boiler on...

Over the weekend I've tried D.00 settings at 5, 10, 15 and 24 each with flow settings of 50, 60, 70 & 75. This alters the maximum output and slows the time taken to reach (and exceed) flow target. However, doesn't affect the flow/return differential and boiler cycles when return reaches the...

I do apologise for not saying thanks, I really am grateful for all the responses. As you can see, I haven't mastered the art of brief responses and I guess just stating facts was my attempt at this. Are you suggesting setting D.00 low and D.071 high Grumpy? I can certainly play around with...

I think you may have identified the key issue Jeff. Radiators are, Flat panel double 1400mm x 400mm 1280mm x 400mm 1120mm x 400mm 1000mm x 400mm Flat panel single 2200mm x 600mm 630mm x 700mm Single with convector fins (replacement for original) 1300mm x 600mm They were originally connected...

D.00 setting makes no difference to the anti-cycling behaviour. It just takes the boiler longer to reach (and them exceed) the target flow temperature as it limits the max output. The minimum output modulates down to 5.2Kw whatever the D.00 setting.

Hi Guys, I wonder if you could help me understand my central heating system a little better. Here's the setup. New Vaillant Ecotec Plus 832 combi boiler connected to older system of 7 flat panel radiators in 3 bed semi. Boiler fires up and burner and pump are at low settings for a few minutes...