The Refcomp SW3L-7000 is a 70 HP (52 kW) semi-hermetic screw air conditioning compressor engineered for flexible capacity matching, stable mechanical operation, and dependable pressure protection. It supports both stepped and stepless capacity control, allowing output to track system load and avoid unnecessary full-capacity running.
The SW3L-7000 offers stepped or stepless capacity control to accommodate changing cooling demands. As a variable capacity screw compressor, it adjusts output to system loads, helping avoid unnecessary full-capacity operation.
Multiple high-precision bearings support axial and radial rotor loads, helping maintain stable alignment during compression. Effective lubrication and precise fitting reduce friction and operating noise, supporting smoother movement and limiting mechanical wear.
Partial-winding starting helps reduce initial electrical demand compared with direct-on-line starting. An optimized suction-gas cooling arrangement removes motor heat during operation, helping maintain stable operating temperatures and supporting reliable motor performance.
The internal safety valve connects the high- and low-pressure sides, helping protect against excessive pressure differences. Its precise opening and reliable reset provide additional protection during abnormal operating conditions, reducing the risk of pressure-related damage.
| Model | SW3L-7000 |
|---|---|
| Rated power | 70HP / 52KW |
| Displacement 50/60Hz | 237 / 284 m³/hr |
| Weight | 420 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 | 139 / 459 A |
| Max operating current | 117 A |
The SW3L-7000 belongs to the low-temperature refrigeration range. Before selecting this screw air conditioning compressor, confirm that the required refrigerant, evaporating and condensing temperatures, and cooling duty fall within its approved operating range.
This 70 HP screw compressor uses partial-winding starting in its standard configuration. Verify the motor wiring sequence, site power supply, phase condition and protection connections against the manufacturer's electrical diagram before commissioning.
An air conditioning screw compressor replacement requires careful checking of the existing oil circuit. Since the SW3L series has no integrated oil separator, verify that the external oil separation, return arrangement and oil-flow protection are compatible with the selected compressor.
If the screw air conditioning compressor does not adjust output correctly, first verify the selected stepped or stepless control configuration, controller signals and solenoid-valve wiring. Confirm electrical and control compatibility before inspecting the slide-valve mechanism.
