GEA FK40/560 N Assembly Instructions Manual

Also see for FK40/390 K: Assembly instructions Maintenance manual Maintenance manual

Contents

GEA FK40/560 N Assembly Instructions Manual Manual pdf 17 page image

1709716-01.2013-DGbFEITrCnDGBFEITRCN5| CommissioningAs changing the shaft seal involves opening the refrigerantcircuit, this is recommended only if the seal is losing refriger-ant. Replacing the shaft seal is described in the spare partkit concerned.Emptying the oil reservoir: The oil reservoir can be emptiedvery simple without having to dismantle the coupling and/orbelt drive. It is recommended that this is done at the sametime as the air-conditioning maintenance and motor service.To proceed, detach the oil hose from the bracket, remove thesealing plug and drain the oil into a collecting vessel. Afteremptying, reseal the oil hose and clamp it into the bracket.Dispose of the used oil in accordance with nationalregulations.The compressor shaft is sealed to outside using a shaft seal. The sealing element rotates with theshaft.The following is especially important to ensuring fault-free operation:The complete refrigerant circuit must be correctly executed and clean inside.Heavy shocks and vibrations to the shaft as well as continuous cyclic operation are to be avoided.The sealing surfaces can stick together during prolonged downtimes (e.g. winter). Therefore, runthe system every 4 weeks for 10 minutes.5.8 Shaft seal, emptying the oil reservoir5.9 Avoiding liquid shocksATTENTION! Slugging can damage the compressor and cause refrigerant toleak.To avoid liquid shocks, the following points should be observed:The complete refrigeration plant must be correctly designed and executed.The capacities of all components must be compatible (particularly evaporator and expansionvalve).Suction gas superheating at the evaporator output should be at least 7 – 10 K (check setting ofthe expansion valve).The system must reach a state of equilibrium.Particularly in critical systems (e.g. several evaporator points), suitable measures, e.g. use ofliquid traps, solenoid valve in the liquid line, etc. are recommended.Fig. 19