Figure 23: Heavy do not lift manually
HEAVY
do not lift
manually
Figure 24: handle with Spreader bar
Figure 25: incorrect handling
Piping assembly
Good practices for piping assembly is a pre-requisite to ensure compressor life time (system cleanliness, brazing
procedure etc.)
Table 24: System cleanliness
Circuit contamination possible cause:
Requirement:
Brazing and welding oxides
During brazing,
flow
nitrogen through the system.
Filings and particles from the removal of burrs in
pipe-work
Remove any particles and burrs generated by tube cutting and hole drilling.
Moisture and air
Use only clean and dehydrated refrigeration grade copper tubing.
Opened compressor must not be exposed to air more than 20 minutes to avoid moisture captured by PVE oil.
Brazing procedure:
• Brazing operations must be performed by
qualified
personnel.
• Make sure that no electrical wiring is connected to the compressor.
• To prevent compressor shell and electrical box overheating, use a heat shield and/or a heat-absorbent compound.
• Clean up connections with degreasing agent
• Flow nitrogen through the compressor.
• Use
flux
in paste or
flux
coated brazing rod.
• Use brazing rod with a minimum of 5% silver content.
• It is recommended to use double-tipped torch using acetylene to ensure a uniform heating of connection.
• To enhance the resistance to rust, a varnish on the connection is recommended.
© Danfoss | Climate Solutions | 2023.08
AB392939083370en-000202 | 45
Scroll compressors, VCH115 | Application
