Hello everyone, I'm a bit of a pool noob but I'm trying to pick up and learn as much as I can.
Just this past weekend, I installed a new Intelliflo VS pump to replace an aging single speed pump, and most everything works just fine. I seem to be having an issue with my heater, and I'm concerned it has to do with the bypass on it due to low flow rate.
When I use the Pentair spreadsheet to calculate flow rate, everything seems like it should be fine. I'm passing about 27gpm without the heater running during normal filter mode, and 45 when heating.
However, the pressure on my filter is very low. During the normal filter cycle at what should be 27gpm, the filter pressure gauge reads at around 2. Does this seem normal?
I should mention this is a mastertemp 400 heater and a Pentair DE filter, 48 sq.ft.
And here's what I'm seeing on the filter pressure gauge at various speeds:
Old Single Speed - 18psi
VS @ 1400rpm - 2psi
VS @ 2750rpm - 10psi