Standard Semi-Hermetic Reciprocating Compressors – Series Z
Frascold S.p.A. Standard Semi-Hermetic Reciprocating Compressors – Series Z — Industrial refrigeration; large commercial and industrial cold rooms, process cooling. Low and medium temperature. RSH head compatible..
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Check valve condition (suction and discharge valves) for wear, pitting, or leakage – replace valve plates and reeds per manufacturer intervals
Oil level and oil quality inspection – verify correct lubricant grade (POE, mineral, or naphthenic) and check for contamination, discoloration, or moisture ingress
Crankcase heater function verification before startup to prevent liquid refrigerant migration and oil dilution
Suction and discharge pressure readings compared to design values – check for abnormal superheat, high discharge temperature (> 120 °C indicates problems)
Motor winding insulation resistance test (megger test) to detect moisture or winding degradation
Cylinder head and valve cover gaskets inspection for refrigerant or oil leaks; check bolt torques
Belt tension and coupling alignment check (open-type C6 units) – inspect coupling joint or pulley for wear
Safety devices verification: oil pressure differential switch, high-pressure and low-pressure cut-outs, discharge temperature sensor – confirm correct setpoints and function
Type-general inspection and maintenance points for this equipment category — not model-specific.
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