Howden WRV 255 is chucking out its oil into the system - 5 litres a day.

Visual checks on mesh in the oil separator that can be seen seem to indicate no serious contamination but obviously can't check in the body of the mesh. Can the oil sep be flushed out to clean out crud that may be blocking the mesh?

No bits of mesh in the bottom of the oil receiver so I'm assuming the mesh isn't breaking up.

Someone had wound open the valve on the small bleed line onto the compressor suction at some stage, maybe hoping to clear the issue. Other machines were only open a half-turn.

Otherwise machine seems OK. Machine has not been worked on recently so I am assuming no-one has left bits out of, (or left bits in) the oil circ system.

Correct oil is being used. Machine temps appear OK.

Is it just that the oil sep has reached the end of its life??

Steve