Unità refrigerante a tre compressori

Linde, Bitzer VHM 316-4521, S4G-12.2-40P, S4G-12.2 Y

Linde / Bitzer | Industrial Three-Compressor Refrigeration Unit

Frame Technical Specification:
Set Manufacturer: Linde Aktiengesellschaft
Model / Type: VHM 316-4521
Serial Number: 10309
Year of Manufacture: 1993
Refrigerant: R22
Permissible Working Pressure: 25 / 13 bar
Frame Dimensions (L×W×H): 2930 × 830 × 1870 mm

Installed Compressors Specification (3x Bitzer Kühlmaschinenbau GmbH):
Power Supply: 380–420 V (50 Hz) / 440–480 V (60 Hz) – 3 phase
Max Operating Current: 24 A (per compressor)
Single Unit Displacement: 42.3 m³/h (at 50 Hz) / 51.0 m³/h (at 60 Hz)
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Total Set Displacement: 126.9 m³/h (at 50 Hz) / 153.0 m³/h (at 60 Hz)
Protection Rating: IP 54

Compressor List in Section:
Compressor No. 1:
Type: S4G-12.2 Y
Serial Number: 15851279

Compressor No. 2:
Type: S4G-12.2-40P
Serial Number: 1676905728

Compressor No. 3:
Type: S4G-12.2-40P
Serial Number: 1678210359

Industrial central multi-compressor refrigeration pack built by the German group Linde based on three two-stage, semi-hermetic reciprocating compressors Bitzer, S4G series. These systems are dedicated to low-temperature installations – cold stores, blast freezers, and advanced refrigeration systems for food processing plants (meat, fish, bakery).

The configuration of three identical units enables highly flexible, three-step cooling capacity management (increments of 33%). The system automatically activates the required number of compressors based on the actual heat load, optimizing energy consumption and extending component life. All units are mounted on a compact support frame for easy installation.

Key features:
- Reliable Bitzer two-stage compressors: The two-stage series is specifically designed for deep-freezing, ensuring stable operation at very low evaporation temperatures with a high energy efficiency ratio.

- Linde frame safety and automation: Industrial-quality frame integrates a common suction and discharge manifold, advanced oil balancing and separation system, and the necessary control and measurement apparatus (protective pressure switches), effectively safeguarding the system against failures.

- Industrial protection class (IP 54): Hermetically sealed electrical enclosures and compressor construction protect the system from moisture and dust, allowing safe operation in demanding machine room environments.

- Universal application: The unit is factory-configured for R22 refrigerant. Due to the presence of "Y" type compressors (charged with ester oil), the system can be successfully adapted for modern, eco-friendly HFC refrigerants (e.g., R448A / R449A / R404A / R507) after a standard check of seals and automation settings.

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