Digital Geek
Member
my first thread here,
I have a standing water column for my geothermal Heat Pump. My pump installer screwed up on the pump sizing. Initially put a smaller pump 10GS05 and then larger pump 18GS07 with M07412. Right now, the pump is pumping 26 gpm, which is extremely unnecessary and consuming a lot of power. My geo unit is a waterfurnace series 7 and is variable speed compressor. So it needs 17gpm at max, and at 80% of the time requires about 8 to 9 gpm. The geo demand is between 4 to 17 gpm. So after extensive research, the pump installer is suggesting installing a 1AS15 VFD and call it a day. I'm not convinced. However, I'm very concerned about power consumption.
The WELL is used for the geo and nothing else and the water is returned to the well.
· 13GS05 pump (3 wire)
· M07432 motor, yes ¾ HP
· 3AS20 VFD (single phase input and 3 phase output)
Pump installers does not like the above setup and says it does not make sense.
further reading I see that I can do a 13GS05 (2 wire) and M05422 with 1AS15 VFD
I'm completely lost and desperately looking for help. right now, i can simply add the 1AS15 VFD because i have to wait for spring to get to the pump
Any guidance or recommendations would be much appreciated.
I have a standing water column for my geothermal Heat Pump. My pump installer screwed up on the pump sizing. Initially put a smaller pump 10GS05 and then larger pump 18GS07 with M07412. Right now, the pump is pumping 26 gpm, which is extremely unnecessary and consuming a lot of power. My geo unit is a waterfurnace series 7 and is variable speed compressor. So it needs 17gpm at max, and at 80% of the time requires about 8 to 9 gpm. The geo demand is between 4 to 17 gpm. So after extensive research, the pump installer is suggesting installing a 1AS15 VFD and call it a day. I'm not convinced. However, I'm very concerned about power consumption.
The WELL is used for the geo and nothing else and the water is returned to the well.
- Depth: 605'
- well static 29' from grade,
- an additional 22' to house (not sure what this means)
- 18gs07412 Goulds Submersible
- recovery 3gpm
- 500' of Shroud
· 13GS05 pump (3 wire)
· M07432 motor, yes ¾ HP
· 3AS20 VFD (single phase input and 3 phase output)
Pump installers does not like the above setup and says it does not make sense.
further reading I see that I can do a 13GS05 (2 wire) and M05422 with 1AS15 VFD
I'm completely lost and desperately looking for help. right now, i can simply add the 1AS15 VFD because i have to wait for spring to get to the pump
Any guidance or recommendations would be much appreciated.