Mitsubishi Heavy Industries FDTC50ZHXV Technical Manual page 358

Models FDC200, 250 [Branch pipe set : DIS-WB1]
Gas line
Outdoor unit
1
L
3
Liquid line
(Example)
Item
Liquid pipe
Indoor unit
combinations Main pipe Branch pipe Main pipe Branch pipe
Model
FDC200 100 + 100
FDC250 125 + 125
Notes (1) For model FDC200, when the length of the main piping "L" exceeds 30m, φ12.7mm liquid pipe should be used. If φ9.52mm liquid pipe is used instead of φ12.7mm,
it may cause performance degradation and/or leakage of condensate from indoor unit.
(2) Minimum one-way piping length should be 3m. If the piping length is less than 3m, the precharged amount of refrigerant should be reduced at site by recovering
refrigerant and recharging proper amount according to the instruction of our distributor.
• The branch piping (both gas and liquid lines) should always be arranged to have a level or perpendicu-
lar position.
< 2-Way Branch >
< 3-Way Branch >
(ii) Triple type
■ The indoor_outdoor piping length differences among indoor units are less than 3m.
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 φ9.52mm to φ6.35mm at indoor unit side (flare
connection). Accordingly be sure to select the liquid piping size φ9.52mm from branch to indoor unit.
Indoor unit
2
Gas pipe
φ 22.22 × t 1.6
Mount sections level with the floor.
Indoor unit
3
3
2
3
Gas pipe
Chart of shapes of branch piping parts (DIS-WB1)
Gas pipe Symbol
ID15.88
ID25.4
1
19
39
ID15.88
Notes (1) Symbol 1 to 3 in the drawing shows the symbols of branch piping parts in the
chart respectivelys.
(2) Branch piping should always be arranged to have level or perpendicular position.
(See the below figure.)
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.)
348
- -
Liquid pipe Symbol
ID9.52
ID9.52
OD12.7
2
10
ID9.52
190
sections
(DIS-TA1)
Liquid pipe Symbol
ID9.52×3
ID9.52
2
ID9.52
8
8
8
237
Reducer Symbol
ID9.52
3
10
80
Floor
Floor
Reducer Symbol
3
50
105