I am looking at the Bryant 286 3 ton HP unit. The coil quoted to me is a Bryant CNPVP4241A. The dealer said it is for a 4 ton unit but he likes to put in coils a little larger than is required. Is this a good coil or one that has leak problems? The owner didn't know of any ATA or ACA coils. I can't find much for info on it. Thanks.