Hi, can anyone advise on where I can adjust the flow rate on a NuHeat UFH system? The system dates back to 2007/2008.
Twisting the white marked plastic on the flow rail does not do anything and the there does not seem to be any other adjustment under this except the brass nut (which I guess is for taking the flow rate meter off). There is a square nut on the return rail under the actuator (as shown in the photo). A radiator bleed key fits this and it turns but the marker on the flow rate meter does not move. Is this the right place to make the adjustment and is the flow rate meter not moving because they are all stuck?
Thanks in advance.
