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Thank you for valued support and interest. Alan :D :D :D

Yesterday, I fitted a Primaflow 3/8” Air Eliminator (automatic bleed valve). Completely drained the system, flushed with fresh water and refilled. Pumped the system without the boiler switched on. Bled each radiator in turn, starting at the bottom radiator. Then opened the...

As stated in the quote the arrows (cast in the body of the pump) were pointing up, to me this means the direction of flow is up and the also meant the label was in the correct orientation. The rotaion of the pump was checked and was found to be in the correct direction according to Grundfos...

The system was never drained and flushed by closing each radiator. Originally the system was drained for the purposes of replacing the pump and installing the required distance piece. The pump was installed with the flow arrows pointing up, the flow comes in at the bottom and goes out at...

The problem was recently identified after replacing the main pump from a euramo mxl 180 to a grundfos Selectric 15-50. The pump was replaced because it was noisy and viabrating, even when operated at the low speed. There was also a lot noise (kettling) from the boiler. All the noise...

Home heating parts

The boiler is a Potterton Netaheat Profile 60e. The programmer is a Potterton EP 2000. The room thermostat is Honeywell wall mounted simple unit. Yes, the trial was started with CH only. After about 30 mins the radiator temperature drops but the pump and boiler continue to run. The...

If I operate the room thermostat by switching the temperature up the following happens: 1) CH Motorised valve opens (checked by using the manual lever) 2) Grundfos pumps starts and runs 3) Boiler starts and runs 4) System running 1-2degC temperature difference either side of the CH...

The system has two Honeywell motorised valves and not a three port valve. I have operated themanual levers on the motorised several times whist the pump has been running and not running. The next step will be to take the motorised valves out a check they opening fully. For two days now...

The problem I have is the boiler will lift the temperature of the radiators to between 50-60 degC, then goes to standby and the returns and hold the radiators at the this temperature for a while. After a short period of time the goes back into standby mode then lights up again for 2-3 minutes...