Hermetic Compact Screws SP-300-5
Hermetic Compact Screws SP-300-5
The document provides an overview of the Hermetic Compact Screws, specifically the VSK31 and VSK41 models, designed for air conditioning units, liquid chillers, and railway carriages. These compressors are noted for their compact design, low weight, and smooth operation over a wide speed range, making them ideal for confined installations.
- Simple, robust construction with a hermetically sealed design.
- Low noise and vibration levels.
- Optimized for R134a refrigerant with ester oil charge.
- Integrated oil separator, filter, check valve, and pressure relief valve.
- Suction gas cooled motor with direct drive.
- Motor protection with thermal PTC and phase sequence monitoring.
- High efficiency due to optimized rotor profile and precise machining.
- Capacity control with variable speed and optional integrated mechanical regulator for VSK41.
- Terminal box rated IP66 (IP65 for VSK31).
The compressors comply with the EC Pressure Equipment Directive 97/23/EC, with a maximum allowable pressure of 25 bar.
The VSK41 series features a new regulating system using a hydraulically activated piston for capacity control, ensuring stability and efficient operation at high temperatures. Control is managed electrically via solenoid valves, with an option for frequency inverter control.
- Displacement: VSK31 (20-87 Hz), VSK41 (20-70 Hz).
- Weight: VSK31 (88 kg), VSK41 (152-155 kg).
- Oil charge: 4.5-5.5 dm3.
- Electrical supply: 230 V∆ /400 VY/3/50 Hz or 275 V∆ /460 VY/3/60 Hz.
- Capacity steps: 100% and 50%.
Detailed performance data is provided based on specific operating conditions, including evaporating and condensing temperatures, refrigerating capacity, and power consumption.
The compressors are designed for continuous operation with specific limits on evaporating temperatures during startup.
The document outlines specifications for motor contactors in the AC3 usage category, recommending two motor contactors at approximately 60% of the maximum service current. Continuous power regulation is achieved using a frequency converter, with standard voltage options being 230 V∆ /400 VY/3/50 Hz and 275 V∆ /460 VY/3/60 Hz. Power regulation stages are available at 100% and 50%.
The nominal power data for the compressor depends on service conditions. The VSK3161-15Y model is also available as a special version VSK3162-15Y with two-stage power regulation.
Dimensional drawings for standard versions are included, 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.
Bitzer Kühlmaschinenbau GmbH is located at Eschenbrünnlestraße 15, 71065 Sindelfingen, Germany. Contact can be made via phone at +49 (0) 70 31 932-0 or fax at +49 (0) 70 31 932-146 & -147. More information is available on their website www.bitzer.de or via email at [email protected].
Catalog excerpts
Kompakt- Compact hermetiques Schrauben Screws compactes
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Hermetik Schrauben VSK31 / VSK41 Hermetic Screw Compressors VSK31 / VSK41 Compresseurs à vis hermétiques VSK31 / VSK41 Die hermetischen Kompaktschrauben ergänzen das Schraubenverdichter-Programm im unteren Leistungsbe-reich. Sie eignen sich für den Einsatz in fabrikmäßig gefertigten Klimagerä-ten, Flüssigkeits-Kühlsätzen und insbesondere für die Klimatisierung von Schienenfahrzeugen. The Hermetic Compact Screws completes 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...
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The deciding features Les points marquants ❏ Einfacher, robuster Aufbau ❏ Simple and robust construction ❏ Conception simple et robuste ❏ Dauerhaft dicht durch vollverschweißten Außenmantel ❏ Hermetically sealed by welding ❏ Low weight ❏ Durablement étanche par enveloppe externe entièrement soudée ❏ Niedriges Gewicht ❏ Small space requirement ❏ Poids réduit ❏ Geringer Platzbedarf ❏ Low noise and vibration levels ❏ Encombrement minime ❏ Niedriges Geräusch- und Schwingungsniveau ❏ Optimized design for R134a ❏ Niveau sonore faible et peu de vibrations Die entscheidenden Merkmale ❏ Optmierte Auslegung...
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Leistungsregelung und Anlaufentlastung 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 Industrie-Schraubenverdichtern. 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...
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Application limits Limites d'application betrieb - beim Startvorgang kurzfristig hohere Verdampfungs- temperaturen moglich Application limits for continuous operation - when starting higher evaporation temperatures possible for short periods Limites d'application pour fonctionnement permanent - d'evaporation plus elevees sont possibles pendant un court Atoh Suction superheat [K] Atoh Surchauffe a Inspiration [K] Leistungswerte Performance data Donnees de puissance bezogen auf 10 K Sauggas-Uberhitzung; based on 10 K suction gas superheat; 5 se referant a surchauffe a I'aspiration de 5 K Flussigkeits-Unterkuhlung...
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Technische Daten Technical data Caracteristique techniques © Fur die Auslegung von Schutzen, Zuleitungen Beide Motorschutze auf ca. 60% des maxi- malen Betriebsstroms auslegen. © Andere Spannungen und Stromarten Verdichter-Leistung: Diese Angaben sind Nominal- werte, die von den jeweiligen Betriebsbedingungen des Verdichters abhangig sind. © For the selection of contactors, cables and fuses the max. operating current must be con- Contactors: operational category AC3 Select both motor contactors for approx. 60% of the maximum operating current. © Stepless capacity control with frequency inverter...
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Maßzeichnungen 1 (HP) 7/16"-20 UNF 2 (LP) 7/16"-20 UNF Croquis cotés SL Ø42 DL Ø35 783 392 63 587 328 243 151 122 80 8 154 241 304 227 80 291 3 205 224 Ø19 235 47 4 M10x1,5 VSK41 5 1 1/4"-12 UNF 6 SL Ø42 149 63 270 222 112 4 174 302 323 516 DL Ø35 327 VSK31 Dimensional drawings 25 47 100 91 Ø21 65 480 Ø21 240 180 290 931 3 4 M10x1,5 2 (LP) 7/16"-20 UNF 1 (HP) 7/16"-20 UNF 349 283 Anschluss-Positionen Connection positions Position des raccords 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 Hochdruck-Anschluss (HP) Niederdruck-Anschluss (LP) Ölschauglas Ölablass Öleinfüll-Stopfen Ventil für Leistungsregelung...
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www.bitzer.de • [email protected] Änderungen vorbehalten / Subject to change / Toutes modifications résérvées 04.06 Bitzer Kühlmaschinenbau GmbH Eschenbrünnlestraße 15 71065 Sindelfingen, Germany fon +49 (0) 70 31 932-0 fax +49 (0) 70 31 932-146 & -147
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