Piping Design; 11-1.R32 Piping Material - Mitsubishi Electric City Multi PURY-M200YNW-A1 Data Book

11. PIPING DESIGN

11-1. R32 Piping material
11. PIPING DESIGN
Refrigerant pipe for HYBRID CITY MULTI shall be made of phosphorus deoxidized copper, and has two types.
A. Type-O: Soft copper pipe (annealed copper pipe), can be easily bent with human's hand.
B. Type-1/2H pipe: Hard copper pipe (Straight pipe), being stronger than Type-O pipe of the same radical thickness.
The maximum operation pressure of R32 air conditioner is 4.30 MPa [623psi]. The refrigerant piping should ensure the safety
under the maximum operation pressure. MITSUBISHI ELECTRIC recommends pipe size as Table 1, or You shall follow the local
industrial standard. Pipes of radical thickness 0.7mm or less shall not be used.
Table 1. Copper pipe size and radial thickness for R32 HYBRID CITY MULTI.
Size (mm) Size (inch) Radial thickness (mm)
ø6.35 ø1/4"
ø9.52 ø3/8"
ø12.7 ø1/2"
ø15.88 ø5/8"
ø19.05 ø3/4"
ø19.05 ø3/4"
ø22.2 ø7/8"
ø25.4 ø1"
ø28.58 ø1-1/8"
ø31.75 ø1-1/4"
ø34.93 ø1-3/8"
ø41.28 ø1-5/8"
* For pipe sized ø19.05 (3/4") for R32 air conditioner, choice of pipe type is up to you.
* The figures in the radial thickness column are based on the Japanese standards and provided only as a reference. Use pipes that meet the
local standards.
MEES18K068
Radial thickness (mil)
0.8 [32]
0.8 [32]
0.8 [32]
1.0 [40]
1.2 [48]
1.0 [40]
1.0 [40]
1.0 [40]
1.0 [40]
1.1 [44]
1.2 [48]
1.4 [56]
Pipe type
Type-O
Type-O
Type-O
Type-O
Type-O
Type-1/2H or H
Type-1/2H or H
Type-1/2H or H
Type-1/2H or H
Type-1/2H or H
Type-1/2H or H
Type-1/2H or H
R2-Series
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