Danfoss VTT Series Applications And Installation Manual page 39

Variable twin turbo centrifugal compressors
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Figure 21
Typical Refrigeration Piping
Schematic with Sub-cooler
Economizer
Refrigerant Piping Design
RECOMMENDED
ALL OTHERS ARE REQUIRED
CHILLED WATER
EVAPORATOR
CONDENSER
TOWER WATER
SUBCOOLING CIRCUIT
ECONOMIZER, SUBCOOLER TYPE
The components marked with (*) are recommended.
All the other components are mandatory.
The above Typical Refrigeration Piping Schematics are for the systems with a single compressor on a single
circuit. Staging valves are recommended for the systems with multiple compressors on a common circuit as
recommended in the piping design section of this manual.
EEV_P
DRIVE
MODULE
NOTE
NOTE
M-AI-VT-001-EN Rev.C.1
EV
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