Mitsubishi Heavy Industries FDCA Series, Technical Manual, Page: 113 / 163

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111
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Models FDCA801, 1001 [Branch pipe set : DIS-WA1 2set, DIS-WB1 1set]
Outdoor unit
Indoor unit
DIS-WA1
DIS-WA1
DIS-WB1
Gas line
Liquid line
3
2
1
4
7
7
5
6
6
6
5
4
7
7
6
Chart of shapes of branch piping parts (DIS-WB1)
Gas pipe Liquid pipe Reducer Mark Mark Mark
39
190
10
19
ID25.4
ID15.88
ID15.88
ID9.52
ID9.52
ID9.52
OD12.7 ID9.51
11
80
184
8
80
10
1 2 3
Chart of shapes of branch piping parts (DIS-WA1)
Gas pipe Liquid pipe Reducer Mark Mark Mark
24
210
8
105
50
8
11
ID15.88
ID15.88
ID15.88
ID9.52
ID9.52
ID9.52
ID9.52
OD15.88 ID12.7
2 piece
2 piece
φ
6.35
flared nut
11
48
180
8
80
10
4 5
6
7
Item
Liquid pipe
Main pipe 1st branch pipe 2st branch pipe
φ
9.52 t 0.8
φ
12.7 t 0.8
φ
12.7 t 0.8
φ
15.88 t 1.0
φ
9.52 t 0.8
Main pipe 1st branch pipe 2st branch pipe
φ
15.88 t 1.0
φ
25.4 t 1.0
φ
9.52 t 0.8
Gas pipe
Model
FDCA801
FDCA1001
Notes (1)
1
to
7
in the drawing include parts provided in the branch piping set. It shows the codes for the shapes of different-diameter connections.
(2) Branch piping should always be arranged to have level or perpendicular branch. (Refer to the 108 page for details.)
(3) Mark
3
shows for the FDCA801 model only.
Notes (1) In the case of the FDCA801, if the length of the main pipe exceeds 40 m, make the liquid piping size
φ
12.7.
(2) Use the irregular fittings 6 supplied with the branch piping set on the indoor unit side, and make the branch piping
(branch ~ indoor unit) liquid piping size
φ
9.52.
(3) Mark is 7 to FDCA801 only.
Indoor unit
combinations
201 201 201 201
251 251 251 251
(b) Flare processing
1) The unit and the refrigerant pipe are to be flare connected. Flare a pipe after a flare nut is attached onto it.
2) Because the parallel side measurement of a
φ
12.7 or
φ
15.88 flare nut will be changed depending on the measurement
after flaring, do not fail to change the size of a flare to one specified for R410A.