How to set automatic bypass valve?
- Thread starter AndyDavis
- Start date
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"one turn" will vary considerably between different makes!
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Find out what flow you need through the boiler as a minimum (ie only the bypass open).
Look at a pump curve such as this one in the BES cat
Say you need 0.3 litres/sec. If you're on speed 3 the pump will provide that at 4.5 metres. So set the ABV to that figure, or a tad less.
That's all there is to it if the ABV is near the pump.
There are good reasons to put the ABV at the far end of a rad circuit, in which case there will be losses in the pipes to consider.
-------------
Find out what flow you need through the boiler as a minimum (ie only the bypass open).
Look at a pump curve such as this one in the BES cat
Say you need 0.3 litres/sec. If you're on speed 3 the pump will provide that at 4.5 metres. So set the ABV to that figure, or a tad less.
That's all there is to it if the ABV is near the pump.
There are good reasons to put the ABV at the far end of a rad circuit, in which case there will be losses in the pipes to consider.
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