APC Cooling Unit identification. All Cooling Units . APC Unit Identification ... FM Air/ Water /Glycol W= Water Cooled F= Water Cooled D= Water Cooled ... G= Glycol Cooled ... B= Glycol Cooled ... P= Glycol Cooled ... W= Hot Water U= Upflow R= Upflow ... coil C= Chilled Water U= Upflow R= Upflow C= Chilled Water ... Main C= Chilled Water W= Water Cooled ... G= Glycol Cooled BA=208 ... U= Upflow W= Water Cooled ... G= Glycol Cooled U= Upflow R= Upflow