Mechanical Vibrations; Gas Pulsation - Danfoss MLM Series Application Manuallines

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PPLICATION UIDELINES

Mechanical vibrations

Gas pulsation

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OUND AND VIBRATION MANAGEMENT
Vibration isolation constitutes the primary meth-
od for controlling structural vibration. MLZ/MLM
scroll compressors are designed to produce
minimal vibration during operations. The use of
rubber isolators on the compressor base plate or
on the frame of a manifolded unit is very eff ec-
tive in reducing vibration being transmitted from
the compressor(s) to the unit. Rubber grommets
are supplied with all MLZ/MLM compressors.
Once the supplied rubber grommets have been
properly mounted, vibration transmitted from
the compressor base plate to the unit are held to
The MLZ/MLM scroll compressors have been de-
signed and tested to ensure that gas pulsation
has been minimized for the most commonly en-
countered refrigeration pressure ratio. On instal-
lations where the pressure ratio lies beyond the
typical range, testing should be conducted under
all expected conditions and operating confi gu-
FRCC.PC.015.A4.02
a strict minimum. In addition, it is extremely im-
portant that the frame supporting the mounted
compressor be of suffi cient mass and stiff ness to
help dampen any residual vibration potentially
transmitted to the frame. The tubing should be
designed so as to both reduce the transmission
of vibrations to other structures and withstand
vibration without incurring any damage. Tubing
should also be designed for three-dimensional
fl exibility. For more information on piping design,
please see the section entitled "Essential piping
design considerations".
rations to ensure that minimum gas pulsation is
present. If an unacceptable level is identifi ed, a
discharge muffl er with the appropriate resonant
volume and mass should be installed. This infor-
mation can be obtained from the component
manufacturer.