had a burn out on a 25 ton tandem copeland compressor's. Replace compressor's and added a suction line drier, as well as replacing the liquid line Drier. After running for a day I took a pressure reading across suction Drier. There was a 10 psi drop. So I replaced the filter thinking it was clogged. Right when I started the unit it still had a 10 psi drop across the filter. the lititure on the filter says it should have a 2 psi drop across the filter. The filter is rated for a 40 ton unit. Is My system realy that dirty or is something else going on?