Compressor Start Capacitor Size

The full load amps and voltage supply numbers should be readily available in the compressor s manual.

Compressor start capacitor size.

If you are able to determine that the compressor can be repaired by replacing the capacitor it is a simple process to fix it. To calculate the proper capacitor size yourself start by multiplying the full load amps by 2 650. This hesitation when operating will cause noisy operation an increase in power consumption a drop in motor performance and eventually overheating or overloading motors like compressors. Once you ve done this simple math the resulting number is the capacitor s microfarad or mfd which indicates the size of the capacitor you need.

Capacitors rated above 70uf are considered start capacitors and are generally removed from the circuit electrically during operation. If you choose one that is far too big or small the capacitor will burn out and can spray the liquid inside of it on the other components of the air conditioner. To select the correct capacitance value start with 30 to 50μf kw and adjust the value as required while measuring motor performance. 1 a rule of thumb has been developed over the years to help simplify this process.

Then divide this number by the overall voltage supply for your compressor. Looking online at the supco 0410 type it works with most refrigerators. How to sizing the starting capacitor. This is where the rule of 10 of the rating came from for start capacitors only.

If my guess is correct i think it will be around 15uf however that said i see one capacitor is 100mfd and the other 14mfd. The entire overload and capacitor run start setup is in the supco package. Fortunately there are three ways. We also can use this basic formula to calculate capacitor sizing.