Hello, I have a Hayward super pump 700 and I noticed it has two capacitors on the top of the motor. One of the capacitors has two wires coming out of it that cannot be disconnected to replace with another capacitor. Any recommendations on where I can locate these two capacitors? I believe one is for starting and one is for running. One is a 20uf and one is a 40uf
This Capacitor, Run 370v 40 Mfd (rd-40-370) will replace the run capacitor but I am sorry to say that we do not have your start capacitor available.
The voltage on the replacement run capacitor should be at least √2 x the intended voltage. Assuming a maximum voltage of 250 volts, the capacitor minimum rating should be 354 volts, so 370 volts should be fine. 450V is a better quality capacitor and will last longer, especially under high temperature conditions, but the 370 volt should be fine.
It looks like the start capacitor is 20 uMF (microfarad) at 450 volts, so a replacement with the same specifications will be fine. Search online for an RP-2 capacitor or check at your local Ace Hardware store for it (many carry them) but be sure the replacement has the same dimensions so it fits.
The motor’s centrifugal switch is supposed to take the start capacitor and start winding out of the circuit as soon as the motor rpm gets close to full speed. This should happen in about 2 to 3 seconds, as a start capacitor cannot take continuous voltage for more than a few seconds. The continuous voltage will cause the capacitor to fail.
If you find that a capacitor is charged when you try to discharge it the windings of the motor are probably bad.
In case you have not already seen this, here is a guide on How to Test a Pool Pump Capacitor and our guide on How To Replace a Pool Pump Capacitor has some very helpful tips.