Our company installed 4 York rooftop units a couple of years ago for a Big lots have had no problems until recently one had a grounded compressor. While doing the procedure to replace I noticed a sporlan C-164 liquid line drier on the discharge line(by the way these are heat pumps, MN BAVA-T060AB)I checked the other 3, same thing. Needless to say i removed the drier and intalled a bi-directional one in the liqiid line. Is this a screw-up that got overlooked? or does York beleive the drier will act as a muffler? Sporlan designed it to function as a liquid line drier, in my 30 years never heard of a discharge line drier. Any guys seen this?