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Introduction
Properties of R744 – general system and design criteria
Safety
General safety references
Measures in case of unintentional emission of R744
Pressure relief valves to atmosphere on compressor
Safety devices of the system in accordance with EN378
Maximum allowable pressure of the compressor housing
Compressor with line start permanent magnet motor (LSPM)
Transcritical applications
System designs
Gustav Lorentzen process (single stage system)
Booster system for medium and low temperature application with flash gas bypass
Booster system for medium and low temperature application with parallel compression
System components
Filter drier
Parameters and recommendations for optimal system efficiency and operational safety
Recommendations for existing systems
Troubleshooting
Oil management
Oil charge for BITZER compressors
Commissioning
Refrigerant requirements and filling process
Commissioning booster systems for medium and low temperature applications
Notes on commissioning for other system designs
Single stage systems without intermediate pressure vessel (Gustav Lorentzen process)
Systems with large dimensions and high evaporator capacity
System design in the BITZER SOFTWARE
Capacity control
CRII Mechanical capacity control for transcritical compressors
Capacity control with frequency inverter
BITZER refrigerant ejectors
Safety
General safety instructions
Mind with the refrigerant R744
Also observe the following technical documents
Introduction
Operating principle
Ejector in low lift applications
Ejector in high lift applications
Characteristic values
Installation in the system
System designs
System design A
standard ejector system
System design B
with ejector, parallel compression and mechanical high-pressure control valve for emergency operation
Design criteria and selection
Design example of an ejector in a low lift application
Design example of an ejector in a high lift application
Control
Document as PDF
Pressure and saturated vapour temperature table for R744
Checklists for commissioning
Document as PDF