SiE33-003
Refrigerant Piping
Installation Manual
137
6.2
Selection of Piping Material
Step 1
Foreign materials inside pipes (including oils for fabrication) must be 30mg/10m or less.
Step 2
Use the following material specification for refrigerant pipping:
construction material: Phosphoric acid deoxidized seamless copper for refrigerant.
size: Determine the proper size referring to chapter “Example of connection”.
The wall thickness of the refrigerant piping should comply with relevant local and national regulations.
For R-407C the design pressure is 3.2 MPa.
Step 3
Make sure to use the particular branches of piping that have been selected referring to chapter “Example of
connection” on page 165.
Si33-003.book Page 137 Monday, June 25, 2001 9:06 AM
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