Overview

This document details the technical specifications and performance data for semi-hermetic reciprocating tandem compressors designed for 50 Hz operation, compatible with refrigerants like R134a, R404A/R507A, R407C, and R22.

Performance Data

Performance is based on the European Standard EN 12900 for 50 Hz operation, with evaporating and condensing temperatures at dew point conditions. For zeotropic blends such as R407C, there are adjustments in basic parameters, resulting in reduced refrigerating capacity and efficiency (COP). The reference suction gas temperature is now 20°C, previously 25°C. Data excludes liquid subcooling, impacting rated refrigerating capacity and efficiency.

Technical Specifications

The document provides technical data and dimensional drawings, emphasizing the efficiency of tandem compressors for capacity modulation. The 4 and 6 cylinder models can have capacity regulators for up to six capacity steps, suitable for applications with varying loads.

New Octagon® Models

The new tandem compressors based on 2 and 4 cylinder Octagon® models offer compact and efficient solutions for parallel operation, maintaining the features of Octagon® compressors.

Optional Accessories

Optional accessories include crankcase heaters, oil pressure switches, integrated start unloaders, capacity control, additional fans, water-cooled cylinder heads, systems for R22 low temperatures, discharge gas temperature sensors, and motor protection devices with extra functions.

Model Designation

The model designation system includes codes for the number of cylinders, bore x stroke, motor size, series, and ester oil charge.

Conclusion

For more technical details, refer to KP-100 and the BITZER Software for information on power consumption and application limits.

Specifications

Specifications for CR power regulators and capacity control options are provided, operating at 220-240V/1/50/60 Hz with a ±10% tolerance. It highlights the need for specific contactors, cables, and fuses, considering maximum working current and power consumption. The motor is designed for part-winding start with a 50%/50% winding partition, with Y/Δ designs available upon request. Conversion factors for different voltages are included.

Procedures

Selection criteria for contactors, cables, and fuses are specified, emphasizing maximum operational current and power consumption. It details motor contactor configurations and part-winding start motors.

Standards and Recommendations

Recommendations include using a crankcase heater for outdoor installations, long shut-off periods, high refrigerant charge, and potential refrigerant condensation. Self-regulating PTC heaters with different power ratings are specified for various compressor models.

Dimensional Drawings

Dimensional drawings for various compressor models are included, with measurements in millimeters for components and connection positions. Additional dimensions for single compressors (KP-100) are referenced.

Key Components and Connections

Key components listed include high and low-pressure connections, discharge gas temperature sensor, oil fill plug, oil drain, oil filter, oil return, crankcase heater, and oil pressure connections. A legend for connection positions and dimensional drawings is provided.