Reciprocating refrigeration compressor long-term shutdown preservation and restart preparation specification

Reciprocating refrigeration compressor long-term shutdown preservation and restart preparation specification

Reciprocating refrigeration compressor long-term shutdown preservation protects internal components from corrosion, oil degradation and refrigerant leakage during idle period longer than one month. If reciprocating refrigeration compressor is properly preserved for long-term shutdown, the risk of startup failure after idle period can be reduced by 63% compared with direct shutdown without preservation. Xiteliduo reciprocating compressor long-term storage requires crankcase fully filled with lubricant to isolate air from metal surfaces, and all suction/discharge valves should be closed and sealed. Small 4-cyl reciprocating refrigeration compressor for seasonal cold storage shutdown needs to recover refrigerant into liquid receiver before stopping the unit to avoid refrigerant accumulation in crankcase. Medium 4-cyl reciprocating refrigeration compressor electrical cabinet must be kept dry; power on crankcase heater periodically every 15 days to prevent moisture condensation inside motor. Large 4-cyl reciprocating refrigeration compressor should perform crankshaft manual turning every 30 days during long shutdown, to prevent piston and bearing from sticking in static position. Large 6-cyl reciprocating refrigeration compressor with multiple cylinders needs manual rotation of crankshaft to change piston stop position each time to avoid localized corrosion. Many operators stop the compressor and cut off all power directly for long idle time. Moisture accumulation inside motor windings increases insulation failure risk by 47%. Single-unit two-stage refrigeration compressor must isolate interstage pipeline during long shutdown; prevent cross leakage between high-pressure and low-pressure cavities. Cascade unit needs to seal high-stage and low-stage refrigerant loops separately during long-term preservation; low-stage refrigerant such as R23 must be fully recovered and stored in dedicated cylinders.

FAQ

Q1: How much can standard long-term preservation reduce startup failure risk of reciprocating refrigeration compressor? A1: Proper preservation reduces startup failure risk after long idle period by 63%. Q2: What preservation measure is required for crankcase of xiteliduo reciprocating compressor during long shutdown? A2: Fill crankcase completely with lubricant to isolate metal parts from air. Q3: Where should refrigerant be stored before shutting down small 4-cyl reciprocating refrigeration compressor for seasonal idle? A3: Recover refrigerant into liquid receiver before compressor shutdown. Q4: What maintenance action is required for large 4-cyl reciprocating compressor every 30 days during long shutdown? A4: Manually turn the crankshaft to avoid piston and bearing seizure. Q5: What risk rises if all power is cut off completely during long shutdown of reciprocating compressor? A5: Moisture accumulates inside motor windings and insulation failure risk increases by 47%. Q6: What pipeline isolation requirement applies to single-unit two-stage refrigeration compressor during long shutdown? A6: The interstage pipeline must be isolated to prevent cross leakage between high and low pressure cavities. Q7: What refrigerant handling rule applies to cascade unit low-stage circuit before long-term storage? A7: Low-stage refrigerant such as R23 should be fully recovered and stored in dedicated refrigerant cylinders.