Refcomp SW3H-21000 220HP Screw Refrigeration Compressor for Commercial Cold Room
SW3H-21000 screw refrigeration compressor
,220HP screw compressor cold room
,commercial cold room screw compressor
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Optimized Asymmetric Rotor Design
The screw refrigeration compressor uses RefComp's 5/6 asymmetric rotor profile to support smooth compression, helping reduce gas pulsation, vibration and operating noise.
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Compact High-Pressure Housing
The semi-hermetic screw compressor features a 25-bar housing with optimized internal gas passages to reduce flow resistance. Its compact construction integrates key components for convenient system installation.
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INT69 SNY Motor Protection
Six series-connected PTC thermistors work with the INT69 SNY protection module to monitor motor temperature and provide protection against overheating, reverse rotation and phase loss.
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Precision Bearing System
Matched bearing assemblies support axial and radial rotor loads. High-precision bearing components and dedicated lubrication passages help reduce friction and mechanical noise during operation.
| Parameter | Value |
|---|---|
| Model | SW3H-21000 |
| Rated power | 220HP / 164KW |
| Exhaust volume 50/60Hz | 562 / 674 m³/hr |
| Weight | 1030 Kg |
| Capacity Regulation | 100%, 75%, 50%, 25% (stepless 100%–25%) |
| Standard motor | Y/△ – 400V/3/50Hz – 460/3/60Hz |
| LRA Y/Δ | 543 / 1645 A |
| Max Operating Current | 335 A |
Q1: Which refrigerants are compatible with the SW3H series?
The supplied SW-series technical literature lists R22, R134a, R507A, R404A and R407C. Confirm refrigerant compatibility with the specific operating conditions and manufacturer's selection data before ordering.
Q2: What routine maintenance should operators pay attention to?
Regularly inspect the suction filter for contamination, monitor lubricant condition and check for unusual bearing noise or vibration. Follow the manufacturer's maintenance recommendations rather than relying on a fixed service interval.
Q3: What should I check if the motor protection module activates unexpectedly?
If the screw refrigeration compressor trips, check the power supply, phase sequence, motor temperature and PTC sensor circuit. Identify and correct the underlying fault before resetting the protection module.
Q4: What information should I prepare when requesting technical support?
For a screw refrigeration compressor service request, provide the model, refrigerant, operating frequency, suction and discharge pressures, temperatures and any protection alarm indications. This information helps technicians identify potential compressor or system-related problems.
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