Wilo Pump Capacitor Replacement

[PEG]

PEG - this is on a solar thermal system so swapping the pump out is a bit more complex due to it being pressurised with glycol.

Hi,i would hope the system is not pressurised,beyond the pumps specification,and there are gate valves each side of the pump...

What temperature does the glycol get to?

 

[Marko!]

Hi,i would hope the system is not pressurised,beyond the pumps specification,and there are gate valves each side of the pump...

What temperature does the glycol get to?

No, the system runs at about 1.5 to 2 bar. There are gate valves on the pump. Problem is if I remove it, it is likely to lose pressure and I have no way to re-pressurise it. As for temperature - that can vary enormously (depending on the sun!). These systems can reach very high temps, though the controller shuts down if necessary to protect the pump. There is an expansion tank to cater for such situations.

 

[PEG]

PEG - this is on a solar thermal system so swapping the pump out is a bit more complex due to it being pressurised with glycol.

Hi,i would hope the system is not pressurised,beyond the pumps specification,and there are gate valves each side of the pump...

What temperature does the glycol get to?

No, the system runs at about 1.5 to 2 bar. There are gate valves on the pump. Problem is if I remove it, it is likely to lose pressure and I have no way to re-pressurise it. As for temperature - that can vary enormously (depending on the sun!). These systems can reach very high temps, though the controller shuts down if necessary to protect the pump. There is an expansion tank to cater for such situations.

Hi,your picture showed signs of leakage,so i guess it has lost some already. There will be a means of filling the system....never seen one yet,that has not

What type of system is it,and what does it heat? I take it when you say "expansion tank" you mean chamber?

 

[Marko!]

Hi,your picture showed signs of leakage,so i guess it has lost some already. There will be a means of filling the system....never seen one yet,that has not

What type of system is it,and what does it heat? I take it when you say "expansion tank" you mean chamber?[/QUOTE]

Hi PEG, yes there is sign of historical leakage but the area is dry and the system has held constant pressure for the five years I've been here.

There is a fill point but I don't have the kit to fill/pressurise it.

It heats the DHW, and yes I meant an expansion vessel.