I just spent the past 3 days getting beat up by a walk-in freezer. I have a 3 HP Copeland semi-hermetic compressor that is single phase, rated for 230 Volt, and has a water cooled condenser. Unit has 404 freon, and is rated at 20.1 Min circuit amps. It is on a 20 Amp circuit wired in 12 AWG. When it starts, it pulls 27 amps and works it way down to 17.2 amps in about 30 seconds. In doing so, it will occasionally trip the 20 Amp breaker. If the unit doesn't stay off for at least 6 minutes, it will trip the breaker instantly. After pump down, the pressures equalize a bit causing the compressor to kick back on in about 30 seconds and the breaker instantly trips. So as a tempory fix, I rewired the control circuit adding a contactor and time delay relay set for 8 minutes. That seems to work for now. My question is if a unit is rated at 230 volts, not 208/230, how critical is it to have the 230 volts? I only have 208 Volts from the panel. Will that cause rough compressor starting? The compressor is brand new as is all start components. I left there today with the understanding that the electrical circuit will need replaced. I still will only have 208 volts, but atleast it will have proper wire size and breaker size. Do I need to put a boost transformer in? Thanks for any help!