The Refcomp SW3H-19000 is a 200HP screw refrigeration compressor engineered for walk-in cold room applications. It combines flexible capacity control, optimized internal gas flow, integrated pressure safety protection, and intelligent motor monitoring to deliver reliable, efficient performance across varying cooling loads.
The SW3H-19000 screw refrigeration compressor offers four-step capacity control or stepless regulation from 25% to 100%. Its slide-valve mechanism adjusts output to changing cooling loads, helping improve load matching and reduce unnecessary full-capacity operation.
This RefComp screw compressor features optimized internal gas passages that help reduce suction resistance and flow losses. The compact housing integrates key components, simplifying equipment layout while supporting smooth refrigerant flow.
An internal safety valve connects the high- and low-pressure sides to help prevent excessive pressure differences. Its precise opening and reliable reset provide additional protection during abnormal operating conditions, reducing the risk of pressure-related damage.
The INT69 SNY protection module monitors motor overheating, phase loss and reverse phase sequence. Working with six PTC temperature sensors and operating-status feedback, it helps protect the motor and makes electrical faults easier to identify.
| Model | SW3H-19000 |
|---|---|
| Rated power | 200HP / 149KW |
| Displacement 50/60Hz | 510 / 612 m³/hr |
| Weight | 710 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 | 453 / 1333A |
| Max operating current | 305A |
Q1: What information is needed to select the SW3H-19000 for a refrigeration system?
When selecting a screw compressor for refrigeration systems, provide the required cooling capacity, refrigerant, evaporating and condensing temperatures, power supply and expected load conditions. The screw refrigeration compressor should be matched to its actual operating range rather than selected by horsepower alone.
Q2: How can I integrate the compressor's capacity control with my system controller?
For a variable capacity screw compressor, confirm whether the supplied configuration uses stepped or stepless regulation. Check that the controller's output signals and control wiring match the selected slide-valve arrangement before commissioning.
Q3: What should be checked before commissioning the SW3H-19000?
Verify the motor power supply, star-delta starter wiring, phase sequence and protection circuit. Also check the oil-line connection, refrigerant piping and valve positions against the manufacturer's installation instructions.
Q4: What should I do if the compressor stops unexpectedly?
If the screw refrigeration compressor stops unexpectedly, check the INT69 SNY fault indication, motor temperature, power supply and phase conditions. Identify and correct the underlying fault before restarting the equipment.
