WarningCO₂ Transcritical
CO2 Moisture / Dry-Ice (Triple Point) Blockage
Moisture in a CO2 system, or letting pressure fall below the triple point (~75 psia / -70°F), can form ice or solid dry ice and block metering devices.
Symptoms
- Intermittent restriction / starving that clears then returns
- Blockage after a charging error or deep pressure drop
- Acidic oil test results (carbonic acid) / moisture indicator alarm
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