A
PPLICATION
GUIDELINES
S
OUND
AND
VIBRATION
MANAGEMENT
Mechanical vibrations
Vibration isolation constitutes the primary meth-
od for controlling structural vibration. MLZ/MLM
scroll compressors are designed to produce mini-
mal vibration during operations. The use of rub-
ber isolators on the compressor base plate or on
the frame of a manifolded unit is very effective
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 prop-
erly mounted, vibration transmitted from the
compressor base plate to the unit are held to a
strict minimum. In addition, it is extremely im-
portant that the frame supporting the mounted
compressor be of sufficient mass and stiffness 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 vibra-
tion without incurring any damage. Tubing should
also be designed for three-dimensional flexibility.
For more information on piping design, please see
the section entitled "Essential piping design con-
siderations" p. 25.
Gas pulsation
The MLZ/MLM scroll compressors have been de-
signed and tested to ensure that gas pulsation has
been minimized for the most commonly encoun-
tered refrigeration pressure ratio. On installations
where the pressure ratio lies beyond the typical
range, testing should be conducted under all ex-
pected conditions and operating configurations
to ensure that minimum gas pulsation is present.
If an unacceptable level is identified, a discharge
muffler with the appropriate resonant volume and
mass should be installed. This information can be
obtained from the component manufacturer.
32
FRCC.PC.016.A1.22
