4 Ton 208/230 Volts 3-Phase. If you are not familiar with these techniques or you do not have the proper equipment then you SHOULD have a qualified HVAC tech to install your new compressor. Copeland 4ton 3ph scroll compressor zr49k3-tf5-950 zr49kc-tf5-230 zr49kc-tf5-250 from initial contact to the parts.