Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 1056

FDC-HKXR
Note 1: When making branch connections (for both gas and liquid lines), be sure that the proper
horizontal branches and vertical branches are used.
Good
Floor
• Selection piping size
Item
A Same as the outdoor unit piping size (FDCP2501HKRE2)
B Total capacity of connected indoor units
C Total capacity of connected indoor units
D Total capacity of connected indoor units
E Total capacity of connected indoor units
F Total capacity of connected indoor units
G Total capacity of connected indoor units
H
Total capacity of connected indoor units
I
Total capacity of connected indoor units
J
Total capacity of connected indoor units
K Total capacity of connected indoor units
a Indoor unit piping size
b,c Indoor unit piping size
d~f Indoor unit piping size
• Selection of branch piping size.
Item
Horizontal branch piping set – down-flow indoor unit capacity total.
Branch piping 1
Horizontal branch piping set – down-flow indoor unit capacity total.
Branch piping 2
Horizontal branch piping set – down-flow indoor unit capacity total.
Branch piping 3
Branch piping 4 Vertical branch piping set – down-flow indoor unit capacity total.
Branch piping 5 Vertical branch piping set – down-flow indoor unit capacity total.
Piping connection instructions (for the above example)
Process the included reducer as illustrated below.
Use the flare nuts included with the individual flow divide controller.
When the indoor unit capacity is 90 or more
A type
B type
70 or more
When the indoor unit capacity is 50 or less
B type
70 or more
1054
No
Floor
Horizontally
Selection procedure
Selection procedure
Use reducer A and process the φ12.7
portion into a flare.
( OD12.7 → ID15.88 )
Cut off reducer B using a pipe cutter
as shown in the illustration and make a
flare.
( OD15.88 → ID19.05 )
Cut off reducer B using a pipe cutter
as shown in the illustration and make a
flare.
( OD15.88 → ID12.7 )
No
Floor
Piping size(mm)
Intake
Gas line
gas line
ø 19.05 ø 28.58
ø 19.05 ø 25.4
(236)
ø 15.88 ø 19.05
(165)
ø 15.88 ø 19.05
(109)
ø 12.7 ø 15.88
(64)
ø 15.88 ø 19.05
(112)
ø 12.7 ø 15.88
(71)
ø 12.7 ø 12.7
(56)
ø 12.7 ø 12.7
(45)
ø 12.7 ø 12.7
(36)
ø 12.7 ø 12.7
(28)
ø 19.05
(112)
ø 15.88
(71,56)
ø 12.7
(45,36,28)
(348)
(236)
(165)
(109)
(64)
ID19.05(Brazing)
ID15.88(Brazing)
Reducer B
Reducer C C (accessory)
ID6.35(Brazing)
ID12.7(Brazing)
Reducer (accessory)
B
Good
Vertically
Floor
Liquid line
ø 12.7
ø 12.7
ø 9.52
ø 9.52
ø 9.52
ø 9.52
ø 9.52
ø 6.35
ø 6.35
ø 6.35
ø 6.35
ø 9.52
ø 9.52
ø 6.35
Branch pipng set
DIS-1KXR3-E
DIS-1KXR3-E
DIS-1KXR3-E
DIS-V1KXR3-E
DIS-V1KXR3-E
ID19.05(Brazing)
(accessory)
ID6.35(Brazing)
ID12.7(Brazing)