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Semi-hermetic double stage compressor-50/60 Hz

Semi-hermetic double stage compressor-50/60 Hz
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Semi-hermetic double stage compressor-50/60 Hz

Product catalog summary

Overview

This technical document details FRASCOLD semi-hermetic two-stage compressors designed for refrigeration systems operating at 50/60 Hz frequencies. It covers compressor features, standard and optional equipment, electrical protection, technical data, refrigerating capacities, power consumption, component identification, and refrigeration circuit schematics, focusing on refrigerants R404a, R507, and R22.

Main Features

  • High-precision balancing reduces vibration and noise.
  • Heat-treated crankshaft for enhanced durability.
  • Optimized piston design and chromium-plated piston rings improve performance and oil circulation.
  • Lubrication via reversible gear-type oil pump in Series V and Z.
  • Valve plates sized for efficiency in both compression stages.
  • High-efficiency electric motors with winding overheating protection.
  • Injection valve regulates second stage discharge temperature for stable high-pressure operation.

Standard Equipment

  • Suction and discharge shut-off valves with sweat connections.
  • Rubber vibration absorbers and pre-filled lubricant oil.
  • Nitrogen charged at 1 bar to prevent moisture ingress.
  • Oil sight glass for oil level monitoring.
  • Discharge gas temperature sensor with external electronic protection on Series V and Z.
  • Anti-corrosion primer and blue enamel coating on all compressors.

Optional Accessories

  • Liquid subcooling kit: heat exchanger, solenoid valve, sight glass, filter-drier, thermostatic expansion valve for liquid injection.
  • High discharge temperature protection device (S series).
  • Crankcase heater.

Electrical Motor Protection

Thermal protection via PTC thermistors embedded in motor stator windings connected to external control modules. Series V and Z include additional PTC sensors on discharge gas; available on request for S series.

Technical Data and Electrical Characteristics

  • Compressor models (S, V, Z series) with displacement volumes for low and high pressure stages.
  • Motor power ratings (HP and kW), starting methods (DOL, PWS), maximum operating current (MRA), and locked rotor current (LRA).
  • Power input values under various refrigerant conditions, including with/without liquid subcooling at different evaporating temperatures.

Packaging and Weight

Each model lists net/gross weights and packing volume (dm³) for logistics and handling.

Refrigerating Capacity Specifications

  • Capacities in Watts for evaporating temperatures from -20°C to -70°C and condensing temperatures 30°C to 50°C.
  • Data provided for refrigerants R22, R404a, and R507 at 50 Hz and 60 Hz.
  • Correction factors included to adjust nominal capacities based on actual operating temperatures.
  • Example: Model Z 15 60 30 Y with R507 at -50°C evaporating and 50°C condensing has nominal 8660 W capacity; corrected to 9006 W.

Compressor Models and Valve Specifications

  • Models S5, S7, V10, and Z series with suction and discharge valve sizes in inches and millimeters (e.g., S5 suction valve 1"⅜ / 35.0 mm).
  • Valve sizing critical for system integration and performance.

Compressor Components and Connections

  • Detailed identification of plugs, valves, sight glasses, heater seats, oil filter, pressure switch connections, manifolds, cylinder heads, magnetic plugs, and temperature sensors.
  • Essential for maintenance, monitoring, and installation.

Dimensional Drawings and Cooling System Diagram

  • Drawings provide precise measurements for installation planning.
  • Refrigeration circuit schematic without liquid subcooling illustrates component placement and flow paths.

Refrigeration Circuit with Liquid Subcooling

  • Multilingual component nomenclature facilitates international use.
  • Two-stage compression with suction and discharge valves, manifolds, oil separator and return, condenser, evaporator, filter dryer, liquid subcooler, solenoid valve, thermostatic expansion valves, liquid injection valves, and equalizer lines.
  • Liquid subcooling kit components and connections specified for proper integration.

Operating Conditions and Assumptions

  • Standardized conditions: ambient temperature 32°C, suction gas temperature 20°C, condensing temperature 40°C, power supply frequency 50 or 60 Hz.
  • Data calculated (not measured) for comparability.

Critical Parameters Summary

ParameterRange / ValuesNotes
Evaporating Temperature (te)-20°C to -70°CVaries by refrigerant and model
Condensing Temperature (tc)30°C to 50°C (typically 40°C)Standard for data calculation
Power Supply Frequency50 Hz and 60 HzSeparate data sets
Ambient Temperature32°CStandard condition
Suction Gas Temperature20°CStandard condition
RefrigerantsR22, R404a, R507Performance varies
SubcoolingWith and withoutAffects power consumption

Key Recommendations and Best Practices

  • Use correction factors to adjust refrigerating capacities for actual operating temperatures.
  • Select compressors based on required cooling capacity and refrigerant compatibility.
  • Match valve sizes and connections precisely for system integrity.
  • Utilize liquid subcooling kits to improve energy efficiency.
  • Maintain oil separator and return lines for lubrication and compressor longevity.
  • Regularly inspect sight glass and filter dryer to monitor refrigerant condition and prevent moisture ingress.
  • Follow manufacturer guidelines for installation, electrical protection, and maintenance.

Manufacturer's Rights and Contact

FRASCOLD SpA reserves the right to modify specifications without prior notice. Contact details provided for technical support and inquiries.

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Catalog excerpts

Semi-hermetic double stage compressor-50/60 Hz-1

50/60Hz SEMIHERMETIC DOUBLE-STAGE COMPRESSORS Полугерметичные двухступенчатые компрессоры

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Semi-hermetic double stage compressor-50/60 Hz-2

50 Hz • FRASCOLD SpA оставляет за собой право изменять спецификацию и л и ко н с т р у к ц и ю б е з предупреждения и принятия на себя какихлибо обязательств • FRASCOLD SpA reserves the right to change at any time, specifications or design without notice and without incurring obligations. FRASCOLD SpA se réserve le droit de modifier sans préavis les données et les caractéristiques contenues dans cette notice. • FRASCOLD SpA behält sich das Recht vor Spezifikationen Ref: FCAT05-07 Edizione: Ottobre 2008 sostituisce: FCAT05-06 Aprile 2007 Realizzazione: FRASCOLD SpA 2

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Semi-hermetic double stage compressor-50/60 Hz-3

Двухступенчатые полугерметичные компрессоры Two stage semi-hermetic compressors Compresseurs semi-hermétiques double étage Zweistufige halbhermetische Verdichter Двухступенчатые полугерметичные компре ссоры FRASCOLD являют ся результатом продолжительного опыта в разработке, проектировании и производстве поршневых компрессоров. Двухступенчатые полугерметичные компрессоры FRASCOLD могут работать с хладагентами R404a, R507 и R22. Эти компрессоры эффективны и надежны в широком диапазоне эксплуатации. Основные особенности двухступенчатых компрессоров: • высокоточная балансировка движущихся частей...

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Semi-hermetic double stage compressor-50/60 Hz-4

Données techniques Электродвигатель Кол-во цилиндров Electric motor Cylinders Moteur électrique Cylindres Elektromotor Zylinder Technische Daten Объемная производительность Displacement Volume balayé Hubvolume Размер упаковки Вес Weights Poids Gewicht Нетто Брутто net gross net brut Netto Brutto kg l kg 3.30 120 131 Компрессор Compressor Compresseur Verdichter Packing volume Volume emballage Einpacken Запуск электродвигателя с разделенными обмотками (PWS) Прямой пуск электродвигателя(DOL) Direct on line Démarrage direct Direktanlauf Part winding starting Démarrage bobinage fractionné Teilwicklungsanlauf...

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Semi-hermetic double stage compressor-50/60 Hz-5

Champs d'application te °C tc температура конденсации °C te температура кипения °C Температура всасываемого газа 20°C tc condensing temperature °C te evaporating temperature °C Suction gas temperature 20°C tc température de condensation °C te température d'évaporation °C Température du gaz aspiré 20°C tc Verflüssigungstemperatur °C te Verdampfungstemperatur °C Sauggastemperature 20°C Потребляемая мощность Вт * Без переохлаждения power input W * without subcooling puissance absorbée W * sans sous-refroidissement Leistungsaufnahme W * ohne Flüssigkeitzsunterkühlung Потребляемая мощность Вт * С...

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Semi-hermetic double stage compressor-50/60 Hz-6

Compressor Compresseur Verdichter Refrigerating capacity Puissances frigorifiques Темп-ра конденсации Condensing Х Condensation олодопроизводительность Вт Refrigerating capacity W Без переохлаждения without subcooling Verflüssigungs- temperatur Темп-ра кипения Evaporating temperature °C 50Hz Puissances frigorifiques W sans sous-refroidissement Kälteleistungsdaten W ohne Flussigkeitsunterkuhler Холодопроизводительность рассчитана при следующих условиях: - электрическая сеть 50 Гц - без переохлаждения жидкости - темп-ра окружающей среды 32 оС - темп-ра всасываемого газа 20 оС Refrigerating capacities...

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Semi-hermetic double stage compressor-50/60 Hz-7

Compressor Compresseur Verdichter Refrigerating capacity Puissances frigorifiques Темп-ра конденсации Condensing Х Condensation олодопроизводительность Вт Refrigerating capacity W С переохлаждением with subcooling Verflüssigungs- temperatur Темп-ра кипения Evaporating temperature °C 50Hz Puissances frigorifiques W avec sous-refroidissement Холодопроизводительность рассчитана при следующих условиях: - электрическая сеть 50 Гц - темп-ра окружающей среды 32 оС - темп-ра всасываемого газа 20 оС Refrigerating capacities are based on the following conditions: - power supply 50Hz - ambient temperature...

 Open the catalog to page 7
Semi-hermetic double stage compressor-50/60 Hz-8

Compressor Compresseur Verdichter Refrigerating capacity Puissances frigorifiques Темп-ра конденсации Condensing Х Condensation олодопроизводительность Вт Refrigerating capacity W Без переохлаждения without subcooling Verflüssigungs- temperatur Темп-ра кипения Evaporating temperature °C 60Hz Puissances frigorifiques W sans sous-refroidissement Kälteleistungsdaten W ohne Flussigkeitsunterkuhler Холодопроизводительность рассчитана при следующих условиях: - электрическая сеть 50 Гц - без переохлаждения жидкости - темп-ра окружающей среды 32 оС - темп-ра всасываемого газа 20 оС Refrigerating capacities...

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Semi-hermetic double stage compressor-50/60 Hz-9

Compressor Compresseur Verdichter Refrigerating capacity Puissances frigorifiques Темп-ра конденсации Condensing Х Condensation олодопроизводительность Вт Refrigerating capacity W С переохлаждением with subcooling Verflüssigungs- temperatur Темп-ра кипения Evaporating temperature °C 60Hz Puissances frigorifiques W avec sous-refroidissement Холодопроизводительность рассчитана при следующих условиях: - электрическая сеть 60 Гц - темп-ра окружающей среды 32 оС - темп-ра всасываемого газа 20 оС Refrigerating capacities are based on the following conditions: - power supply 60Hz - ambient temperature...

 Open the catalog to page 9
Semi-hermetic double stage compressor-50/60 Hz-10

Compressor Compresseur Verdichter Puissances frigorifiques Темп-ра конденсации Condensing Х Condensation олодопроизводительность Вт Refrigerating capacity W С переохлаждением with subcooling Verflüssigungs- temperatur Темп-ра кипения Evaporating temperature °C Puissances frigorifiques W avec sous-refroidissement Refrigerating capacity Холодопроизводительность рассчитана при следующих условиях: - электрическая сеть 50 Гц - темп-ра окружающей среды 32 оС - темп-ра всасываемого газа 20 оС Refrigerating capacities are based on the following conditions: - power supply 50Hz - ambient temperature 32°C...

 Open the catalog to page 10
Semi-hermetic double stage compressor-50/60 Hz-11

Compressor Compresseur Verdichter Refrigerating capacity Темп-ра конденсации Condensing Х Condensation олодопроизводительность Вт Refrigerating capacity W С переохлаждением with subcooling Verflüssigungs- temperatur Темп-ра кипения Evaporating temperature °C Puissances frigorifiques W avec sous-refroidissement Puissances frigorifiques Холодопроизводительность рассчитана при следующих условиях: - электрическая сеть 60 Гц - темп-ра окружающей среды 32 оС - темп-ра всасываемого газа 20 оС Refrigerating capacities are based on the following conditions: - power supply 60Hz - ambient temperature 32°C...

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