Mitsubishi Electric City Multi CMB-P1016NU-G, Service Handbook

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Read Before Servicing ]
4. Thickness and refrigerant type indicated on the piping materials
Ask the pipe manufacturer for the symbols indicated on the piping material for new refrigerant.
5. Flare processing (O-material (Annealed) only)
The flare processing dimensions for the pipes that are used in the R410A system are larger than those in the R22 system.
If a clutch-type flare tool is used to flare the pipes in the system using R410A, the length of the pipes must be between 1.0
and 1.5 mm. For margin adjustment, a copper pipe gauge is necessary.
6. Flare nut
Type-2 flare nuts instead of type-1 are used to increase the strength. The size of some of the flare nuts have also been
changed.
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.
Flare processing dimensions (mm[in])
Pipe size (mm[in])
A dimension (mm[in])
R410A R22
ø6.35 [1/4"] 9.1 [0.358] 9.0 [0.354]
ø9.52 [3/8"] 13.2 [0.520] 13.0 [0.512]
ø12.7 [1/2"] 16.6 [0.654] 16.2 [0.638]
ø15.88 [5/8"] 19.7 [0.776] 19.4 [0.764]
ø19.05 [3/4"] 24.0 [0.945] 23.3 [0.917]
Flare nut dimensions (mm[in])
Pipe size (mm[in])
B dimension (mm[in])
R410A R22
ø6.35 [1/4"] 17.0 [0.669] 17.0 [0.669]
ø9.52 [3/8"] 22.0 [0.866] 22.0 [0.866]
ø12.7 [1/2"] 26.0 [1.024] 24.0 [0.945]
ø15.88 [5/8"] 29.0 [1.142] 27.0 [1.063]
ø19.05 [3/4"] 36.0 [1.417] 36.0 [1.417]
Dimension A
Dimension B