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

Linde / Bitzer | Three-Compressor Industrial Refrigeration Unit

Frame Technical Specifications:
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: 2930 × 830 × 1870 mm

Specifications of Installed Compressors (3 × Bitzer Kühlmaschinenbau GmbH):
Power supply: 380–420 V (50 Hz) / 440–480 V (60 Hz) – 3 phase
Maximum running current: 24 A (per compressor)
Individual compressor displacement: 42.3 m³/h (at 50 Hz) / 51.0 m³/h (at 60 Hz)
Total displacement of set: 126.9 m³/h (at 50 Hz) / 153.0 m³/h (at 60 Hz)
Protection rating: IP 54

List of Compressors 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 multi-compressor central pack (so-called compressor pack) manufactured by the German concern Linde, based on three two-stage, semi-hermetic Bitzer S4G reciprocating compressors. Systems of this type are dedicated for low-temperature applications such as cold stores, blast freezers, and advanced refrigeration systems in food processing plants (meat, fish, bakery).

Dedjy Ub A Nepfx Ab Nskp
The construction, based on three twin units, allows for highly flexible, three-stage capacity control (stepped at 33% increments). The system automatically engages the required number of compressors according to current thermal load, optimizing energy consumption and extending component service life. The unit is assembled on a compact support frame for ease of installation.

Key Features:
- Reliable Bitzer two-stage compressors: This series is specially designed for deep-freezing, offering stable operation at very low evaporation temperatures with a high energy efficiency ratio.

- Linde frame safety and automation: The industrial-grade frame integrates a common suction and discharge manifold, state-of-the-art oil equalizing and separation system, and all essential control and measurement instrumentation (protective pressure switches), ensuring effective protection of the system against failures.

- Industrial protection rating (IP 54): Hermetically sealed electrical boxes and compressor construction protect the system against moisture and dust, allowing safe operation in harsh plant environments.

- Universal application: The unit is factory-adapted for use with R22 refrigerant. Due to the presence of compressors with the "Y" designation (pre-filled with ester oil), the system can be converted for use with modern, eco-friendly HFC replacements (such as R448A / R449A / R404A / R507) following standard seal and control system checks.

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