The Refcomp SW3L-3000 is a 30HP (22KW) low-temperature semi-hermetic screw compressor engineered for reliable refrigeration performance. It combines flexible capacity regulation, integrated pressure safety protection, precision multi-bearing construction and intelligent motor monitoring to support stable operation across demanding cooling applications.
The SW3L-3000 semi-hermetic screw compressor supports stepped or stepless capacity control configurations. Its slide-valve mechanism allows output to follow changing cooling loads, improving load matching and reducing unnecessary full-capacity operation.
The integrated safety valve connects the high- and low-pressure sides to help prevent excessive internal pressure differences. Precise opening and reliable reset provide additional protection during abnormal operating conditions, helping reduce the risk of pressure-related damage.
Multiple bearing assemblies support axial and radial loads while maintaining stable rotor alignment. High-precision fitting and effective lubrication help reduce friction, vibration and mechanical noise, supporting smooth operation and limiting component wear.
The INT69 SNY module works with six PTC temperature sensors to monitor motor overheating, phase loss and reverse phase sequence. Real-time operating feedback helps identify abnormal conditions, supporting timely troubleshooting and reducing the risk of motor damage.
| Model | SW3L-3000 |
|---|---|
| Rated power | 30HP / 22KW |
| Displacement 50/60Hz | 118 / 142 m³/hr |
| Weight | 245 KG |
| Capacity Regulation | 25%, 50%, 75%, 100% 4-step; 25%–100% stepless |
| Standard Motor | Y/△ – 400V/3/50Hz – 460/3/60Hz |
| Star/Delta Start Current | 110 / 331 A |
| Max operating current | 65 A |
Q1: How do I check whether the SW3L-3000 is suitable for my refrigeration system?
When selecting a low-temperature screw compressor, provide the required cooling capacity, refrigerant, evaporating and condensing temperatures, power supply and expected load conditions. These details help confirm whether this semi-hermetic screw compressor operates within the required system range.
Q2: What should be checked in the oil circuit before commissioning?
For a screw compressor for refrigeration systems, verify the oil-line connections, filter condition, solenoid valve operation and oil-flow monitoring according to the supplied configuration. Proper oil circulation is essential for bearing lubrication and reliable compressor operation.
Q3: What electrical requirements should be confirmed before installation?
Before commissioning this 30 HP screw compressor, confirm that the site power supply matches the motor specifications. Check the partial-winding starter configuration, phase sequence and electrical protection connections against the manufacturer's wiring diagram.
Q4: What should I do if the motor protection module triggers an alarm?
If the semi-hermetic screw compressor stops following an INT69 SNY alarm, inspect the indicated fault, motor temperature, phase condition and protection wiring. Identify and correct the underlying problem before restarting the compressor.
