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Gas pulsation
DSF has been designed and tested to ensure that gas pulsation is optimized for the most commonly encountered
air conditioning pressure ratio. Manifolded compressors are equivalents to lagged sources of gas pulsation.
Therefore, pulse level can vary during time.
Mitigations methods:
If an unacceptable level is identified, a discharge muffler with the appropriate resonant volume and mass can be
installed.
Mitigation methods
Mitigations methods:
To ensure minimum vibrations transmission to the structure, strictly follow Danfoss mounting requirements
(mounting feet, rails etc..). For further information on mounting requirements, please refer to section
Ensure that there is no direct contact (without insulation) between vibrating components and structure.
To avoid resonance phenomenon, pipings and frame must have natural frequencies as far as possible from
running frequency. Solutions to change natural frequencies are to work on structure stiffness and mass
(brackets, metal sheet thickness or shape…).
Manage operating envelope
The
for DSF scroll compressors guarantees reliable operations of the compressor for
steady-state operation.
Steady-state operation envelope is valid for a suction superheat within 5K to 10K range at nominal Voltage.
Discharge temperature protection
DSF270 to DSF530 include an integrated discharge temperature protection. Excessive discharge temperature will
result in tripping of electronic module ouput relay.
This protection, effective for suction superheat above 5 – 10 K (9 – 18 °F), should be considered as a compressor
safety device and its purpose is not to ensure operation map control.
In case of basic map control by pressure switches that can not ensure totally that the compressor will remain in its
operating envelope, an additionnal external discharge protection is required. (see
Figure 49: Discharge temperature
Scroll compressors, DSF090 to DSF530 | Application
© Danfoss | Climate Solutions | 2023.06
AB309735209512en-000603 | 42
