The Refcomp SW3L-11500 is a 115 HP (89 kW) semi-hermetic screw compressor engineered for R410a HVAC and refrigeration systems. It combines flexible capacity regulation, efficient motor starting and cooling, and precision multi-bearing support to deliver stable, reliable performance across demanding operating conditions.
For screw compressor HVAC projects requiring low-temperature cooling, the SW3L-11500 offers stepped or stepless capacity control. Its slide-valve mechanism helps match compressor output to changing loads, reducing unnecessary full-capacity operation.
Star-delta starting helps reduce motor starting current compared with direct-on-line starting, easing the initial demand on the electrical supply. Suction-gas cooling helps remove motor heat, supporting stable operating temperatures.
Multiple high-precision bearings support axial and radial rotor loads, helping maintain stable alignment during compression. Effective lubrication and precision fitting reduce mechanical friction and noise, supporting smoother operation and limiting component wear.
The 360° rotatable suction and discharge shut-off valves allow installers to adjust pipe routing according to equipment layout. An integrated discharge check valve helps prevent refrigerant backflow during shutdown, providing additional system protection.
| Model | SW3L-11500 |
|---|---|
| Rated power | 115 HP / 89 kW |
| Displacement 50/60 Hz | 380 / 456 m³/hr |
| Weight | 665 kg |
| Capacity regulation | 25%, 50%, 75%, 100% 4-step; 25%–100% stepless |
| Standard motor | Y/△ – 400V/3/50Hz – 460V/3/60Hz |
| Star/Delta start current | 276 / 876 A |
| Max operating current | 196 A |
Before selecting this model for screw compressor HVAC applications, confirm that the required refrigerant, cooling capacity and operating temperatures fall within its approved operating range. The SW3L series is primarily intended for low-temperature refrigeration and process cooling.
This refrigeration screw compressor requires an appropriately matched external oil separation and return system. Verify the oil-line connections, filtration and flow-protection devices to ensure reliable lubrication during operation.
Before starting this 115 HP screw compressor, verify that the site power supply matches the motor specifications. Check the star-delta starter wiring, phase sequence and INT69 SNY protection circuit against the manufacturer's electrical diagram.
For a variable capacity screw compressor, confirm whether the selected configuration uses stepped or stepless regulation. When integrating it into a screw compressor HVAC system, verify the controller signals, solenoid-valve wiring and slide-valve control compatibility before commissioning.
