Has anybody had a problem of oil migration while working ,of a bitzer screw comp ,
the unit is an air cooled unit, with heat recovery ,using r-22,a danfoss exv.
all pressures are within the norm,250 \65psi water is, ewt-11c,lwt-7c ,sh-7c, the oil seemes to migrate to the air cooled condenser which is off durring heat recovery,as soon as valve to heat recovery closes,hot water reaches set point , all oil returns to comp
i would be happy to hear ideas!
and what can be done to prevent this!