Need to do some minor work on our CH system.
I have drained the systme before so am quite confident in carrying this out, however, I want to try to minimise the quantity of residual air, post re-fill, requiring bleeding. The reason why I say this is that the last time we drain/re-filled it seemed quite a lot of air may have collected in the boiler causing banging during boiler heat up. (Banging now ceased)
Is there any way to re-fill with minimum residual air? This is a pumped system with 3 way valve. We have what appears to be a pressure relief valve on a pipe leading off the pumped circuit. This has a small plastic knurled knob and an allen keyed screw. Can I open this to help relieve the air during refill or even during the bleed whilst running process.
Would appreciate any advice.
I have drained the systme before so am quite confident in carrying this out, however, I want to try to minimise the quantity of residual air, post re-fill, requiring bleeding. The reason why I say this is that the last time we drain/re-filled it seemed quite a lot of air may have collected in the boiler causing banging during boiler heat up. (Banging now ceased)
Is there any way to re-fill with minimum residual air? This is a pumped system with 3 way valve. We have what appears to be a pressure relief valve on a pipe leading off the pumped circuit. This has a small plastic knurled knob and an allen keyed screw. Can I open this to help relieve the air during refill or even during the bleed whilst running process.
Would appreciate any advice.