The SW3L-20000 screw AC compressor features RefComp's asymmetric 5/6-tooth rotor profile, helping achieve smooth rotor engagement and reduced vibration. This RefComp screw compressor uses optimized rotor geometry to support efficient compression and stable mechanical operation.
The semi-hermetic screw compressor uses multiple precision bearings to support axial and radial rotor loads. Accurate fitting and effective lubrication help reduce friction, mechanical noise and component wear, supporting reliable operation under demanding refrigeration conditions.
The INT69 SNY module works with six PTC temperature sensors to monitor motor overheating, reverse phase sequence and phase loss. Operating-status feedback helps technicians identify electrical faults more efficiently and reduces the risk of motor damage.
The 360° rotatable suction and discharge shut-off valves provide flexible piping orientation, making installation easier in different equipment layouts. An integrated discharge check valve helps prevent refrigerant backflow during shutdown, providing additional system protection.
| Model | SW3L-20000 |
|---|---|
| Rated power | 200HP / 149KW |
| Displacement 50/60Hz | 600 / 720 m³/hr |
| Weight | 1050 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 | 543 / 1645 A |
| Max operating current | 270 A |
Q1: Can the SW3L-20000 be used in an air-conditioning system?
The SW3L-20000 belongs to RefComp's low-temperature refrigeration range. Before selecting this screw AC compressor, verify that the required refrigerant, cooling capacity and evaporating and condensing temperatures fall within its approved operating envelope.
Q2: Which capacity-control configuration should I choose?
For a variable capacity screw compressor, stepped regulation suits systems with defined load stages, while stepless regulation allows finer output adjustment. Confirm the selected slide-valve configuration and controller compatibility before ordering.
Q3: What should be considered when designing the lubrication system?
The SW3L-20000 does not include an integrated oil separator, so a properly matched external oil separation and return system is required. Check the oil circuit, filtration, flow monitoring and piping connections against the manufacturer's installation requirements.
Q4: What should I check if the compressor trips during startup?
If the screw AC compressor stops following a protection alarm, inspect the INT69 SNY fault indication, motor temperature, phase sequence and electrical connections. Identify and correct the underlying fault before restarting the equipment.
