- EN
As a classic 3-phase scroll model, the ZR47KCE-TFD-522 operates with R407C refrigerant and 380V power supply. It is commonly equipped on small precision air conditioners, laboratory constant-temperature units and commercial air-cooled systems, serving as a mature mainstream model in the HVAC industry.
Equipped with Copeland axial and radial compliant scroll technology, the orbiting scroll can float and retreat automatically. It effectively tolerates short-term and mild liquid return caused by unit start-stop and seasonal temperature changes, preventing sudden liquid slugging damage. This advantage makes it far more reliable than traditional reciprocating compressors for 24/7 continuous operation.
Key Specifications: 4HP, 380V 3-phase 50Hz, R407C refrigerant, factory-charged POE oil. It is fitted with built-in motor thermal protector and internal pressure relief valve. The thermal protector cuts off power on motor overheat while the relief valve releases excessive pressure for safety. Sound pressure around 73 dBA at 1m under rated condition, below 74 dBA.
Field Advantages: Fewer moving parts for stable continuous operation; low noise suitable for server rooms and laboratories; unloaded start reduces current impact and protects electrical components.
Existing Drawbacks: Fixed-speed on/off control without capacity modulation. Frequent start-stop under fluctuating thermal loads accelerates fatigue of pipelines and valve components, raising risk of component fatigue failure over time.
1. Crankcase heater preheat after long shutdown After long-time shutdown, refrigerant migrates and dissolves in lubricant. Direct startup causes flooded operation and internal wear. Preheat the crankcase heater for more than 12 hours as official requirement to avoid early failure.
2. Do not cancel the suction accumulator Many projects remove the liquid separator to cut costs. Although no immediate failure occurs, seasonal liquid return causes hidden bearing wear and sudden compressor burnout after 1–2 years.
3. Use only standard POE oil, no mixing Mixing mineral oil or non-standard lubricants leads to oil deterioration, carbon deposition, blocked oil circuits and repeated overheat trips.
Recommended: Small precision AC, laboratory temperature control units, commercial air-cooled HVAC with occasional mild liquid return and long-term continuous operation.
The ZR47KCE-TFD-522 remains popular in commercial precision HVAC systems due to its excellent condition tolerance brought by flexible scroll technology.
