Title: +175=737.001_IK001_Brukermanual for Refra varmepumpe.Produktinformasjon.pdf
Compressor Oil Compressor oil, in addition to creating an oil film between the rubbing parts, also provides a seal gaps between the rotors, sealing the points of possible leakage and cooling components. Consequently, the oil should be injected in excess, compared with the required for the lubrication number. In screw compressors REFRA ® recommends the use recommended by the manufacturer of compressors synthetic oil on polyester-based (POE). Differential pressure switch oil pressure oil injection compares with the pressure of suction, is activated after the compressor run with a time delay sufficient for the occurrence of pressure difference, through which the oil is supplied to the compressor. With the value of the difference of pressure below the pressure switch is triggered, leading to disable the compressor. Since the pressure injection of oil depends on the injection pressure, the latter must be maintained at not less than the minimum, the minimum value increases with increasing suction pressure (in