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Application Guidelines
System cleanliness
Compressor handling and
storage
© Danfoss | Climate Solutions | 2022.03
Installation
Each MLZ/MLM compressor is shipped with
printed Instructions for installation. These
Instructions can also be downloaded from our
web site
The refrigeration system, regardless of the type
of compressor used, will only provide high
efficiency and good reliability, along with a long
operating life, if the system contains solely the
refrigerant and oil it was designed for. Any other
substances within the system will not improve
performance and, in most cases, will be highly
detrimental to system operations.
The presence of non-condensable substances
and system contaminants, such as metal
shavings, solder and flux, have a negative
impact on compressor service life. Many of these
contaminants are small enough to pass through a
Each Danfoss MLM/MLZ scroll compressor is
equipped with two lift rings on the top shell.
Always use both these rings when lifting the
compressor. Use lifting equipment rated and
certified for the weight of the compressor.
A spreader bar rated for the weight of the
compressor is highly recommended to ensure a
better load distribution. The use of lifting hooks
closed with a clasp and certified to lift the weight
of the compressor is also highly recommended.
Always respect the appropriate rules concerning
lifting objects of the type and weight of these
compressors. Maintain the compressor in an
upright position during all handling manoeuvres
(maximum of 15° from vertical).
Never use only one lifting lug to lift the
compressor. The compressor is too heavy for the
single lug to handle, and the risk is run that the
lug could separate from the compressor with
extensive damage and possible personal injury
as a result.
Store the compressor not exposed to rain,
corrosive or flammable atmosphere and between
-35°C and 70°C when charged with nitrogen.
Single compressors
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mesh screen and can cause considerable damage
within a bearing assembly. The use of highly
hygroscopic PVE oil in MLZ compressors requires
that the oil be exposed to the atmosphere just as
little as possible.
During the manufacturing process, circuit
contamination may be caused by:
• Brazing and welding oxides,
• Filings and particles from the removal of burrs in
pipe-work,
• Brazing flux,
• Moisture and air.
When the compressor is mounted as part
of an installation, never use the lift rings on the
compressor to lift the installation. The risk is run
that the lugs could separate from the compressor
or that the compressor could separate from the
base frame with extensive damage and possible
personal injury as a result.
Never apply force to the terminal box with the
intention of moving the compressor, as the
force placed upon the terminal box can cause
extensive damage to both the box and the
components contained inside.
HEAVY
do not lift
manually
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