ASHP Pipe sizing

[Barnboy]

Thank you @JohnMo , I will look into all of this later this evening. Your wealth of knowledge has been extremely helpful.

[Barnboy]

@JohnMo what sort of pressure / flow were you putting through the ion filter ?

I'm looking at filling and pressure testing my system later today and don't know what sort of flow the filter will work at before being overwhelmed.

Should I fit it inline from the garden hose, (the hose can produce about 4.5bar when the borehole pump kicks in) or fill the system and then run the manifold pump and divert the flow through the ion filter ?

[JohnMo]

25 minutes ago, Barnboy said:

@JohnMo what sort of pressure / flow were you putting through the ion filter ?

I'm looking at filling and pressure testing my system later today and don't know what sort of flow the filter will work at before being overwhelmed.

Should I fit it inline from the garden hose, (the hose can produce about 4.5bar when the borehole pump kicks in) or fill the system and then run the manifold pump and divert the flow through the ion filter ?

 

I flushed and filled via a flush and fill valve. Like this

https://www.bes.co.uk/22-mm-3-4in-solar-drain-flush-valve-20994/

 

Used the inlet and outlet to throttle down the flow and have a sub 0.5 bar system pressure while flushing.

 

Initial flush was done on a higher rate, maybe 5 to 6 l/min via a 100m garden hose. But mostly to replace the glycol etc. When I was happy everything was clean, I needed to reduce flow down to about 1 l/min or less to get low conductivity reading, for this a switched on the heating circulation pump and manipulated all three valve on the flushing valve unit, to set up a slip stream through the de-ioniser filter and let it run for about 8 hrs one day and same again a couple of days later.

 

 

[Barnboy]

44 minutes ago, JohnMo said:

 

I flushed and filled via a flush and fill valve. Like this

https://www.bes.co.uk/22-mm-3-4in-solar-drain-flush-valve-20994/

 

Used the inlet and outlet to throttle down the flow and have a sub 0.5 bar system pressure while flushing.

 

Initial flush was done on a higher rate, maybe 5 to 6 l/min via a 100m garden hose. But mostly to replace the glycol etc. When I was happy everything was clean, I needed to reduce flow down to about 1 l/min or less to get low conductivity reading, for this a switched on the heating circulation pump and manipulated all three valve on the flushing valve unit, to set up a slip stream through the de-ioniser filter and let it run for about 8 hrs one day and same again a couple of days later.

 

 

Perfect, thank you, I thought that the full pressure of the hose would have overwhelmed the filter.

[JohnMo]

Tap to the house was almost closed also