The Refcomp SW3H-11500 is a 115 HP semi-hermetic twin-screw AC compressor engineered for commercial refrigeration and air-conditioning systems. It combines integrated pressure safety protection, precision multi-bearing rotor support, flexible valve arrangement and efficient motor starting to deliver stable, reliable performance under demanding operating conditions.
The SW3H-11500 screw AC compressor features an internal safety valve connecting the high- and low-pressure sides. Its precise opening and reset help prevent excessive internal pressure differences, providing additional protection during abnormal operating conditions.
The semi-hermetic screw compressor uses a multi-bearing arrangement to manage axial and radial loads, helping maintain stable rotor alignment. Precision manufacturing and effective lubrication reduce friction and mechanical noise, supporting smoother operation and limiting component wear.
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.
The motor uses star-delta starting to reduce initial electrical demand compared with direct-on-line starting. An optimized suction-gas cooling arrangement helps remove motor heat, supporting stable operation and effective temperature management.
| Model | SW3H-11500 |
|---|---|
| Rated Power | 115 HP / 89 kW |
| Displacement (50/60 Hz) | 318 / 382 m³/hr |
| Weight | 540 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 | 318 / 953 A |
| Max Operating Current | 182 A |
Q1: How do I determine whether the SW3H-11500 suits my air-conditioning system?
When selecting a screw AC compressor, provide the required cooling capacity, refrigerant, evaporating and condensing temperatures, power supply and expected load conditions. These details help verify whether the model's operating range matches the actual system requirements.
Q2: What capacity control options are available for the SW3H-11500?
The compressor series offers four-step capacity control at 25%, 50%, 75% and 100%, or stepless regulation from 25% to 100%. For a screw compressor for air conditioning, the appropriate option depends on load variation and controller compatibility. Confirm the required configuration before ordering.
Q3: What should be checked before commissioning the compressor?
Before starting this 115 HP screw compressor, verify the lubrication circuit, suction and discharge valve positions, motor connections and star-delta starter wiring. Check the phase sequence and protective devices against the manufacturer's instructions.
Q4: What maintenance checks help maintain reliable compressor operation?
For this screw AC compressor, regularly monitor oil condition, abnormal vibration, bearing noise and operating temperatures. Check for refrigerant or oil leakage and investigate unusual operating conditions before they develop into more serious mechanical problems.
