Water-cooled heat exchanger

A filter media cartridge of an oil separator having a first cross-sectional shape and an integrated distributor disposed within the oil separator and having a second cross-sectional shape, the filter media cartridge comprising:

• filter media;
• a housing body configured to securably house the filter media and sized to tightly fit within the oil separator,
• the housing body having a third cross-sectional shape substantially similar to the first cross-sectional shape and formed to define a cut-out portion,
• the cut-out portion having a fourth cross-sectional shape substantially similar to the second cross-sectional shape and corresponding in location to the integrated distributor.

A chiller assembly, comprising:

• a compressor;
• an oil separator;
• and
• a single discharge pipe sub-assembly fluidly interposed between the compressor and the oil separator,
• the oil separator comprising an exterior shell and a distributor integrated within the exterior shell,
• the distributor having a cross-sectional area which is substantially similar to that of the single discharge pipe sub-assembly.