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Bitzer OSN8571-K User Manual

Bitzer OSN8571-K
108 pages
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ST-410-2
SH-510-1
APPLICATIONS MANUAL
PROJEKTIERUNGS-HANDBUCH
MANUEL DE MISE EN ŒUVRE
OS.85
OPEN DRIVE SCREW COMPRESSORS
OFFENE SCHRAUBENVERDICHTER
COMPRESSEURS À VIS OUVERTS

Table of Contents

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Bitzer OSN8571-K Specifications

General IconGeneral
BrandBitzer
ModelOSN8571-K
CategoryAir Compressor
LanguageEnglish

Summary

Applications Manual

OS.85 Open Drive Screw Compressors

Overview of OS.85 series compressors designed for various applications.

1 The special highlights

Combination of approved OS technology with CSH series features

Combines proven OS technology with innovative CSH series features for enhanced performance.

Slider control for infinite or stepped capacity control

Enables stepless or stepped capacity control via a slider mechanism.

Economiser with sliding suction position

Features an economiser with sliding suction position for effective part load operation.

Integrated oil management system

Includes automatic oil stop valve, oil filter, and oil monitoring for efficient operation.

Optimised for parallel compounding

Ideal for parallel operation, offering high system capacity and space-saving connections.

2 Design and functions

Design features

Details the two-shaft rotary displacement design with high-efficiency profile geometry.

Compression process Vi-Control

Explains the co-current compression process and the internal volume ratio (Vi).

Capacity control and start unloading

Describes dual capacity control and automatic start unloading features.

Starting the compressor

Details the startup procedure, including unloaded starting and capacity increase.

Infinite capacity control

Recommends infinite capacity control for systems requiring high control accuracy.

3 Lubricants

Table of lubricants for HFC and R22

Lists lubricants for HFC and R22 refrigerants, including viscosity and temperature ranges.

Table of lubricants for NH3

Provides lubricant tables for NH3, emphasizing insolubility and important usage instructions.

4 Integration into the refrigeration circuit

System design and pipe layout

Covers system design, pipe layout, and oil circuit specifics for screw compressors.

Guidelines for special system conditions

Provides guidelines for special conditions like low ambient temperatures and pump down systems.

Safe operation of compressor and system

Ensures safe operation by addressing expansion valve function and general system safety.

Condenser pressure control

Details condenser pressure control for optimal oil supply and separator efficiency.

Start unloading

Explains the importance of effective unloading devices for safe compressor startup.

5 Electrical connection

6 Program overview

7 Technical data

8 Application limits

9 Performance data

10 Dimensional drawing

11 Accessories

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