On Site Piping Work - Mitsubishi Electric FDF71VNXVD Technical Manual

Field piping
φ22.22(OD)
Heavy
4) Refrigerant pipe wall thickness and material
●
Select refrigerant pipes of the table shown on the right wall thickness and material as specified for each pipe
size.
●
This unit uses R410A. Always use 1/2H pipes having a 1.0mm or thicker wall for φ19.05 or larger pipes,
because O-type pipes do not meet the pressure resistance requirement.
Joint pipe C
φ 25.4 (ID)
φ 25.4 (ID)
Branching pipe set Branching pipe set
(DIS-WB1,DIS-TB1) (DIS-WB1,DIS-TB1)
Joint pipe C
φ 25.4 (ID)
Branching pipe set
(DIS-WB1,DIS-TB1)
Pipe diameter [mm] 6.35 9.52 12.7
Minimum pipe wall thickness
[mm] 0.8 0.8 0.8
Pipe material*
O-type pipe O-type pipe O-type pipe
*Phosphorus deoxidized seamless copper pipe C1220T, JIS H3300
Hand
＜N ＞
Taping
2
Nitrogen
Relief valve
gas
Only use nitrogen
Brazing
gas (N )
2
NOTE
15.88 22.22 25.4 28.58
●
1.0 1.0 1.0 1.0 Select pipes having a wall thickness larger
than the specified minimum pipe thickness.
O-type pipe 1/2H-type pipe 1/2H-type pipe 1/2H-type pipe