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Thread: hermetic cycling times
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07-11-2004, 09:52 PM #1
hermetic cycling times
i wonder if anyone knows the recommended no of cycling times/hr for a 3/4 hp hermetic compressor.
i have had a large number of cabinets with the same problem
ie compressor siezing.
details: cab temp 0/4 c run temp
refrigerant r404a
compressor run time approx 1min, comp off time 3 mins
cabinet is controlled by dixell controller, set for 0 with 3 degree diff and 3 min anticycle. control probe is sited in air off and it is uneconomical to resite the probe for more effective control due to the high number of cabinets involved
cabinet is surfrigo dairy stelvio 3000
i am working along the lines of the refrigeration system being too large resulting in too fast temp drop and compressor cycling too fast leading to overheating. the compressors fail within the first 12 months and are replaced like for like under warranty i have not had a satisfactory answer from the manufacturor as to the reason for so many failures.
what other lines should i be following?
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