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compact screw SP-300-5

compact screw SP-300-5

Product catalog summary

Overview: The document details the technical specifications and features of the VSK series compact hermetic screw compressors by BITZER Kühlmaschinenbau GmbH. These compressors are designed for air conditioning units, liquid chillers, and railway carriage air conditioning, focusing on space-saving design and ease of installation.

Key Features:

Hermetically sealed, simple, and robust construction.
Low weight and compact size for confined installations.
Low noise and vibration levels, optimized for refrigerant R134a.
Integrated oil separator and filter, with built-in check and pressure relief valves.
Suction gas cooled motor with direct drive, eliminating gears.
Motor protection includes thermal PTC and phase sequence monitoring.
High efficiency due to optimized rotor profile and precise machining.
Stepless capacity control via variable speed (frequency converter) and optional integrated mechanical regulator.
Terminal box rated IP66 (IP65 for VSK31 models).

Design Safety: The compressors comply with the EC Pressure Equipment Directive 97/23/EC, with a maximum allowable pressure of 25 bar.

Capacity Control and Start Unloading: The VSK41 series features a new regulating system for maintaining compressor housing stability and efficiency. A hydraulically activated piston adjusts the rotor profile length to control capacity, with electrical control via solenoid valves.

Application Limits: Performance data is based on 10 K suction gas superheat and 5 K liquid subcooling, with specific limits for continuous operation and start-up conditions.

Technical Data: Specifications include displacement, oil charge, weight, pipe connections, electrical supply, and frequency range for various models within the VSK series.

Specifications: The document outlines the specifications for the VSK series, detailing synchronous operation voltages as 230 V∆/400 VY/3/50 Hz and 275 V∆/460 VY/3/60 Hz. The compressors have capacity control with steps at 100% and 50%. Special designs like VSK3161-15Y and VSK3162-15Y with 2-step capacity control are available.

Procedures: For selecting contactors, cables, and fuses, the maximum operating current must be considered. The operational category for contactors is AC3, and motor contactors should be selected for approximately 60% of the maximum operating current. Stepless capacity control can be achieved with a frequency inverter.

Standards and Recommendations: The document recommends considering the maximum operating current for electrical components. Other electrical supplies are available upon request.

Dimensional Drawings: Includes dimensional drawings for standard versions, detailing connection positions such as high pressure (HP) and low pressure (LP) connections, oil sight glass, oil drain, oil fill plug, and valve for capacity control.

Additional Information: The document is subject to change and was last updated in May 2010 by BITZER Kühlmaschinenbau GmbH, located in Sindelfingen, Germany.

Catalog excerpts

COMPACT SCREW COMPRESSORS HERMETISCHE KOMPAKT-SCHRAUBENVERDICHTER COMPRESSEURS À VIS HERMÉTIQUES COMPACTES VSK SERIES VSK SERIE SÉRIE VSK B ITZE R Kühlmaschinenbau GmbH Eschenbrünnlest r aße 15 / 71065 Sindelf ingen / Ger many / / Tel +49 (0)70 31 932-0 / Fa x +49 (0)70 31 932-147 / bi t zer@bi t zer.de / w w w.bi t zer.de / Subject to change / Änderungen vorbehalten / Toutes modifications réservées / 05.2010 / / /

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Hermetic Screw Compressors VSK31 / VSK41 Die hermetischen Kompaktschrauben ergänzen das SchraubenverdichterProgramm im unteren Leistungsbereich. Sie eignen sich für den Einsatz in fabrikmäßig gefertigten Klimageräten, Flüssigkeits-Kühlsätzen und insbesondere für die Klimatisierung von Schienenfahrzeugen. The hermetic compact screws complete the compressor screw programme in the lower capacity spectrum. They are suited for insertion into factory finished air conditioning units, liquid chiller units and in particular also for the air conditioning of railway carriages. Les vis hermétiques compactes...

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❑ Einfacher, robuster Aufbau ❏ Simple and robust construction ❏ Conception simple et robuste ❏ Dauerhaft dicht durch vollverschweißten Außenmantel ❏ Hermetically sealed by welding ❏ Durablement étanche par enveloppe externe entièrement soudée ❏ Small space requirement ❏ Geringer Platzbedarf ❏ Niedriges Geräusch- und Schwingungsniveau ❏ Low weight ❏ Low noise and vibration levels ❏ Optimised design for R134a ❏ Faible poids ❏ Encombrement minime ❏ Niveau sonore faible et peu de vibrations ❏ Conception optimale pour R134a ❏ Großzügig dimensionierte Wälzlager, damit hohe Zuverlässigkeit und lange...

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Capacity control and start unloading Régulation de puissance et démarrage à vide Für die Serie VSK41 wurde ein neuartiges Reglersystem entwickelt. Das grundsätzliche Funktionsprinzip entspricht dem eines Steuerschiebers bei IndustrieSchraubenverdichtern. Dabei wird das Fördervolumen durch Verschieben der Ansaug-Steuerkante reduziert. Die Reglereinheit ist so ausgeführt, dass das Rotorgehäuse in seiner Stabilität nicht geschwächt wird. Damit bleiben die Spalte zwischen Rotoren und Gehäuse auch bei hohen Temperaturen in engen Grenzen. Diese Maßnahme ist bei kleineren Schraubenverdichtern – bedingt...

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Einsatzgrenzen Application limits Limites d'application bezogen auf 10 K relating to 10 K se referant a surchauffe a Sauggas-Uberhitzung suction gas superheat Inspiration de 10 K CD Einsatz mit Frequenzumrichter: © Operation with frequency inverter: © Application avec convertisseur de frequence Weitere Hinweise auf Anfrage Further recommmendations upon request Autres recommendations sur demande

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Technical data Compressor type Displace- Oil ment charge 50/60Hz Rohranschlüsse DL SL Druckleitung Saugleitung mm Zoll mm Zoll Pipe connections SL DL Suction line Discharge line mm inch mm inch Capacity control Electrical supply Charge d’huile Raccords SL DL Conduite Conduite de d’aspiration refoulement mm pouce mm pouce ➀ Für die Auslegung von Schützen, Zuleitungen und Sicherungen max. Betriebstrom berücksichtigen. Schütze: Gebrauchskategorie AC3 Beide Motorschütze auf ca. 60% des maximalen Betriebsstroms auslegen. ➁ Stufenlose Leistungsregelung mit Frequenzumrichter ➂ Andere Spannungen und...

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Dimensional drawings Croquis cotés Connection positions Hochdruck-Anschluss (HP) Niederdruck-Anschluss (LP) Ölschauglas Ölablass Öleinfüll-Stopfen Ventil für Leistungsregelung Maßzeichnungen: Standard-Ausführung High pressure connection (HP) Low pressure connection (LP) Oil sight glass Oil drain Oil fill plug Valve for capacity control Dimensional drawings: standard version Raccord de haute pression (HP) Raccord de basse pression (LP) Voyant d’huile Vidange d’huile Bouchon pour le remplissage d’huile Vanne pour régulation de puissance Croquis cotés: version standard

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