CriticalRefrigeration
CO2 High Discharge Temperature / Liquid Injection
CO2 compressors run high discharge temperatures because of the high pressure ratio; if discharge-temp control (liquid/vapor injection or interstage desuperheat) fails, the compressor trips or is damaged.
Symptoms
- Discharge-temperature safety tripping MT or LT compressors
- Discharge temp above limit (often ~266-302°F ceiling)
- Liquid-injection valve not opening when discharge climbs
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