Piping Materials - Mitsubishi Electric PURY-P200 Service Handbook

[3] Piping Materials

OK
New Piping
<Types of copper pipe>
Type-O pipes Soft copper pipes (annealed copper pipes)
They can be bent easily with hands.
Type-1/2H pipes Hard copper pipes (straight pipes)
Stronger than type-O pipes of the same radial thickness.
• The distinction between type-O and type-1/2H pipes is made based on the strength of the pipes themselves.
• Type-O pipes are soft and can easily be bent with hands.
• Type-1/2H pipes are considerably stronger than type-O pipes of the same radial thickness.
<Types of Copper Pipes (Reference)>
Maximum Operation Pressure
3.45 MPa
4.30 MPa
✻ Use pipes that meet the local standards.
<Piping Materials/Radial Thickness>
Use pipes made of phosphorus deoxidized copper.
Since the operation pressure of the units that use R401A is higher than that of the units for use with R22, use
pipes with at least the radial thickness specified in the chart below.
(Pipes with a radial thickness of 0.7 mm or less may not be used.)
Size(mm) Size(inch)
ø 6.35 1/4"
ø 9.52 3/8"
ø 12.7 1/2"
ø 15.88 5/8"
ø 19.05 3/4"
ø 22.2 7/8"
ø 25.4 1"
ø 28.58 1 1/8"
ø 31.75 1 1/4"
✻ Although it was possible to use type-O for pipes with a size of up to ø19.05 (3/4") with conventional refriger-
ants, use type-1/2H pipes for units that use R410A. (Type-O pipes may be used if the pipe size is ø19.05 and
the radial thickness is 1.2t.)
✻ The table shows the standards in Japan. Using this table as a reference, choose pipes that meet the local
standards.
Do not use the existing piping!
Applicable Refrigerants
R22, R407C etc.
R410A
Radial Thickness(mm)
0.8t
0.8t
0.8t
1.0t
1.0t
1.0t
1.0t
1.0t
1.1t
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NO
Existing Piping
Type
Type-O pipes
Type-1/2H or
H pipes