Soft Starter Recommendation Home AC

[Timlindz]

This maybe what you need
https://www.supplyhouse.com/Supco-SPP6-Hard-Start-Kit-w-500-Torque-Increase-90-277V?utm_source=google_ad&utm_medium=Shopping_tm&utm_campaign=Shopping_TM_New_users&gclid=CjwKCAjw2K6lBhBXEiwA5RjtCfxqV5KjOxIs6XP0qIqUpjnJQ5V7Yy9auKkBLhEA8gHC8QUGzMA19hoCNQIQAvD_BwE

 

[Contr_Conn]

Last summer I have installed this kit:
https://www.amazon.com/gp/product/B09J9Y1R39
it's for 3 ton, but they sell similar for larger units.

My AC had high inrush current, and this seems to improve it.

 

[PiperJohn]

What happens is when the compressor cycles too soon after a previous cycle, pressure is built up in the high side and starting requires more current than if it rests for a while.

Solution is to adjust the dwell by settings on the thermostat or adding a on delay relay next to the contactor. So if it rests for say 5 minutes after the last cycle, pressure is disapated and starting current reduced.

 

[g.mccormick]

Home AC condensers/heat pumps use PSC motors. The caps in use are run caps since they stay in the motor circuit continuosly while running instead of a start cap that drops out once started. Hard-start kits are sold to help with high current/hard starting compressors. These kits are basically a start cap and relay that will drop out the start cap after compressor starts.

I'd try one of the previously linked hard-start relays.