• driers water content capacity,
• system refrigeration capacity,
• system refrigerant charge.
For new installations of compressors with polyolester oil, Danfoss recommends using the Danfoss DML (100%
molecular sieve) solid core filter drier.
Filter driers
A properly sized & type of drier is required. Important selection criteria include the driers water content capacity, the
system refrigeration capacity and the system refrigerant charge. The drier must be able to reach and maintain a
moisture level of 50 ppm end point dryness (EPD).
For new installations with CH compressors with polyolester oil, Danfoss recommends using the Danfoss DML (100%
molecular sieve) solid core filter drier. Molecular sieve filter driers with loose beads from third party suppliers shall
be avoided.
For servicing of existing installations where acid formation is present the Danfoss DCL (solid core) filter driers
containing activated alumina are recommended.
The drier is to be oversized rather than under sized. When selecting a drier, always take into account its capacity
(water content capacity), the system refrigeration capacity and the system refrigerant charge.
After burn out, remove & replace the liquid line filter drier and install a Danfoss type DAS burnout drier of the
appropriate capacity. Refer to the DAS drier instructions and technical information for correct use of the burnout
drier on the liquid line.
Assembly line procedure
Installation
Each CH compressor is shipped with printed Instructions for installation. These instructions can also be downloaded
from our web site:
Compressor mounting
Maximum inclination from the vertical plane while operating must not exceed 3 degrees.
Handling
Each Danfoss CH 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 man oeuvres (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 51°C when charged with R410A refrigerant and between -35°C and 70°C when charged with nitrogen.
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.
Scroll compressors, CH290 and CH485 | Application
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