Mitsubishi Heavy Industries FDTC50ZHXV Technical Manual page 231

•
The branch piping (both gas and liquid lines) should always be arranged to have a level or perpendicular
position.
< 2-Way Branch >
< 3-Way Branch >
(iii) Triple type (The below mentioned piping diagram shows the application that the difference in piping
length between indoor units is less than 3m. In case of the application that the difference in piping
length between indoor units is 3m or more, see page 350.)
Model FDC140 [Branch pipe set : DIS-TA1]
Gas line
Outdoor unit
1
L
Liquid line
Item
Liquid pipe
Indoor unit
combinations Main pipe Branch pipe Main pipe Branch pipe
Model
FDC140 50 + 50 + 50
Notes (1) The reducer 3 supplied with the branch piping set should be used in order to reduce the liquid piping size from ø9.52mm to ø6.35mm at indoor unit side (flare
connection). Accordingly be sure to select the liquid piping size ø9.52mm from branch to indoor unit.
Model FDC200 [Branch pipe set : DIS-TB1]
Gas line
Outdoor unit
1
L
Liquid line
Item
Liquid pipe
Indoor unit
combinations Main pipe Branch pipe Main pipe Branch pipe
Model
FDC200 71 + 71 + 71
Notes (1) For model FDC200, when the length of the main piping "L" exceeds 30m, ø12.7mm liquid pipe should be used. If ø9.52mm liquid pipe is used instead of ø12.7mm,
it may cause performance degradation and/or leakage of condensate from indoor unit.
Mount sections level with the floor.
Indoor unit
3
3
2
3
Gas pipe
Indoor unit
2
Gas pipe
22.22 1.6
Floor
Floor
Mount
perpendicular to the floor.
Floor
Floor
Chart of shapes of branch piping parts
Gas pipe Symbol
100 80 80
ID12.7×3
1
ID15.88
10
300
Notes (1) Symbol 1 to 3 in the drawing shows the symbols of branch piping parts in the
chart respectively.
(2) Branch piping should always be arranged to have level or perpendicular position.
(See the above figure.)
Chart of shapes of branch piping parts
Gas pipe Symbol
100 80 80
ID15.88×3
1
ID25.4
10
300
Reducer Symbol
OD15.88 ID12.7
-
10
80
Notes (1) Symbol 1 to 2 in the drawing shows the symbols of branch piping parts in the
chart respectively.
(2) Branch piping should always be arranged to have level or perpendicular position.
(See the above figure.)
222
- -
sections
(DIS-TA1)
Liquid pipe Symbol
ID9.52×3
ID9.52
2
ID9.52
8
8
8
237
(DIS-TB1)
Liquid pipe Symbol
ID9.52×3
ID9.52
2
ID9.52
8
8 8
8
217
Reducer Symbol
OD12.7 ID9.52
-
10
80
Floor
Floor
Reducer Symbol
3
50
105
Reducer Symbol
-
50
105