Hi all,
I thought I'd got my head around my central heating system but I've just discovered an auto bypass valve, the workings of which I don't have a clue about if I'm honest so I'd be really grateful for some help!
I have a Vaillant Ecotec 428 heat only boiler, unvented system with hot water cylinder. All radiators have TRVs. The boiler is downstairs in the utility room. The bypass valve is in the airing cupboard with the pump, that I have recently swapped over for a Lowara Ecocirc 25-8/130 variable speed.
The bypass valve appears to just be set on it's lowest setting. From what I gather this might mean that water is circulating in a loop unnecessarily? Is there a simple way to set it up correctly? I have checked the specs for my boiler and it says it needs a minimum flow rate of 20.3 l/min. I had set my pump on the PP3 setting which is 1.30m3/ph, or CC2 setting which is 1.29m3/ph. The rads heat up fine on both these settings.
I've attached some photos of the pipework, valve and the pressure loss graph for my boiler if that's relevant
I thought I'd got my head around my central heating system but I've just discovered an auto bypass valve, the workings of which I don't have a clue about if I'm honest so I'd be really grateful for some help!
I have a Vaillant Ecotec 428 heat only boiler, unvented system with hot water cylinder. All radiators have TRVs. The boiler is downstairs in the utility room. The bypass valve is in the airing cupboard with the pump, that I have recently swapped over for a Lowara Ecocirc 25-8/130 variable speed.
The bypass valve appears to just be set on it's lowest setting. From what I gather this might mean that water is circulating in a loop unnecessarily? Is there a simple way to set it up correctly? I have checked the specs for my boiler and it says it needs a minimum flow rate of 20.3 l/min. I had set my pump on the PP3 setting which is 1.30m3/ph, or CC2 setting which is 1.29m3/ph. The rads heat up fine on both these settings.
I've attached some photos of the pipework, valve and the pressure loss graph for my boiler if that's relevant