As mentioned in my 'System Drain' thread the house has been extended in 1986. In recent years I felt the circulation was not as good as it should be
.
I have previously replaced a section of pipe when we had blockage at point where cold feed joins together with clean and drain, refill+ inhibitor
About 4 years ago I also replaced the pump like for like Grundfos UPS2 15-50/60.
(As an aside I think I read the set up for open system should idealy be V P C whereas ours is C V P which may partially account for the blockage?)
Having read threads on here I now wonder if in fact the pump been never been big enough to service the pipework we have.
Following the extension its now a long thin house with the extension end being fed by pipework from upstairs to an extra bedroom and 2 drops to ground floor.
That end of the house and in fact the room at the opposite end dont seem to be receiving the full flow. The boiler is downstairs to the right end and the pump is upstairs to left of centre.
I have balanced and most rads in the centre upstairs are only 1/16 open to ensure downstairs gets sufficient flow. I also throttled the feed to the DHW cylinder.
(Without any balancing the upstairs gets all the flow and downstairs gets zero)
End to end the radiator locations are 15 metres apart.
Upstairs there are 11 rads ranging from towel rails to 6 foot single panels (I drained 95 litres from these)
Downstairs there are 7 rads ranging from 2 foot singles to 6 foot doubles. (Not been able to drain yet but guessing similar volume)
Should I consider a larger pump? Or may I then have a pump-over issue?
.
I have previously replaced a section of pipe when we had blockage at point where cold feed joins together with clean and drain, refill+ inhibitor
About 4 years ago I also replaced the pump like for like Grundfos UPS2 15-50/60.
(As an aside I think I read the set up for open system should idealy be V P C whereas ours is C V P which may partially account for the blockage?)
Having read threads on here I now wonder if in fact the pump been never been big enough to service the pipework we have.
Following the extension its now a long thin house with the extension end being fed by pipework from upstairs to an extra bedroom and 2 drops to ground floor.
That end of the house and in fact the room at the opposite end dont seem to be receiving the full flow. The boiler is downstairs to the right end and the pump is upstairs to left of centre.
I have balanced and most rads in the centre upstairs are only 1/16 open to ensure downstairs gets sufficient flow. I also throttled the feed to the DHW cylinder.
(Without any balancing the upstairs gets all the flow and downstairs gets zero)
End to end the radiator locations are 15 metres apart.
Upstairs there are 11 rads ranging from towel rails to 6 foot single panels (I drained 95 litres from these)
Downstairs there are 7 rads ranging from 2 foot singles to 6 foot doubles. (Not been able to drain yet but guessing similar volume)
Should I consider a larger pump? Or may I then have a pump-over issue?
