For processing‑plant owners, reading chiller pressure can be confusing. Unaddressed abnormal pressure easily triggers faults and disrupts production. Here are practical reference values for quick onsite checking!
️ Air‑cooled Chiller At ambient temperature 33℃ with unobstructed exhaust airflow
✅ High‑side pressure: 1.8~1.9 MPa
✅ Low‑side pressure: 0.4~0.5 MPa
Water‑cooled Chiller Less affected by outdoor temperature, delivering more stable pressure
✅ High‑side pressure: 1.7~1.8 MPa
✅ Low‑side pressure: 0.4~0.5 MPa
Screw‑type Chiller Parameters are close to water‑cooled units. Minor pressure fluctuations during operation are normal. No need to worry as long as there is no alarm and readings stay within acceptable ranges.
Pro Tip Slight pressure variation during running is normal❗ Troubleshoot heat dissipation, refrigerant and water circuit only when high‑pressure or low‑pressure alarms pop up.
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