Refcomp SP4LN0800 SP4LN080E Semi Hermetic Chiller Reciprocating Compressor

Featuring solenoid-activated cylinder unloader technology, the SP4LN0800(SP4LN080E) allows its 4-cylinder compression block to switch dynamically between 100% full output and 50% partial load. This dual-step energy regulation enables commercial liquid chillers and parallel compressor racks to match fluctuating thermal demand, curbing electrical power draw and eliminating erratic compressor cycling during low-load operating hours.

To guarantee long-term operational safety in demanding chilling applications, the compressor incorporates an integrated INT6932 electronic protection module. Connected directly to embedded PTC thermistors inside the motor windings, the module continuously monitors stator temperature, phase availability, and operating conditions, automatically tripping the safety circuit to prevent motor burnout caused by electrical imbalance or thermal overload.

Built around a high-strength cast-iron chassis rated for 28-bar working pressure, the drive mechanism utilizes a dynamically counterweighted crankshaft, precision pistons, and specialized hydrodynamic bearings. This balanced internal engineering minimizes mechanical vibration, lowers operating sound levels, and extends overall bearing lifespan up to 50,000 to 80,000 hours under continuous duty cycles.