The vfd controller will be set so that it keeps the outlet pressure of the pump constant no matter what flow is required out of the pump.
Variable speed pool pump how it works.
When you run the pump at lower speeds that means you re using less kw or energy from your power company.
Using a variable speed pump can cut associated energy costs up to 90.
Most variable speed pool pumps go as low as 500 to 600 rpm s so you can really see how this can reduce on the electricity that you use.
With a variable speed pump a pressure sensor is mounted on the outlet of the pump and this measures the operating pressure of the pump.
A 2 pvc pipe can move around 80 gpm total.
When your pool pump is turned on it pulls water from the main drains and skimmer.
A variable speed pool pump will allow you to reduce the flow reducing the sound your features make.
At 862 5 rpm s the motor is using only a scant 17 5 watts.
This is why a proper variable speed pool pump schedule includes periods of time where the pump will run higher than the minimum rpm values.
Here s a quick summary of the process.
A variable speed pump allows you to lower the motor s rpms to the minimum speed needed to turn the water over or to maintain your pool equipment.
If you had a flow meter you just dial it in to 9 gpm and set that as your base operating speed.
Without one you can make an estimate.