WB combi and potential slow flow - still not got round to comprehensive diagnostics.
I've just (duh!) noticed that if the upstairs shower is turned to full cold then the water fairly blasts out - so there is pressure and flow at least in some of the cold side.
Boiler is a WB Greenstar CDi Classic 38CDi. Manual says 19.i lpm 30C temperature rise, 14 lpm 40C temperature rise. It was sized to be able to run two thermostatic mixer showers at the same time. Well over specified to heat a 3 bedroom semi.
I'm still not clear if it throttles the water flow to enable it to meet the chosen temperature setting.
If it does, I assume that if I turn the boiler off and just run cold through it this should show if there is something in the pipework on the hot side which is restricting the flow?
Still puzzled, because a smaller version with the same shower mixer in a previous house managed a much higher flow rate when filling the bath.
As mentioned a while back, I don't currently have an unrestricted hot take off - everything goes through a mixer tap or a thermostatic shower.
One day I will find time to do some proper measurements.
Cheers
Dave R