10. Installation
Outdoor unit
33.6 kW 40.0 kW
(D)
(E)
(C)
(A)
(B)
(3)
(2)
(1)
61.6 kW
Ex.) 135.2 kW
Capacity (kW) No.
Pipe size (mm)
Liquid
Gas
33.6
(1)
Ø 12.70
Ø 28.58
73.6
(2)
Ø 19.05
Ø 34.92
135.2
(3)
Ø 19.05
Ø 41.28
Size of the pipe connected to the outdoor unit (A)
Size of the pipe between the branch joint and the indoor unit
Select the size of the main pipe according to the below table.
Outdoor unit
capacity (kW)
(Cooling)
*Maximum pipe length within 90m *Maximum pipe length over 90m
Liquid (mm)
Gas (mm)
Liquid (mm)
Gas (mm)
Capacity ≤ 25
Ø 9.52
Ø 19.05
Ø 12.70
Ø 22.22
25 < Capacity ≤ 32
Ø 22.22
Ø 25.40
note1)
32 < Capacity ≤ 39
Ø 12.70
Ø 28.58
Ø 15.88
Ø 28.58
39 < Capacity ≤ 44
44 < Capacity ≤ 48
Ø 31.75
note2)
48 < Capacity ≤ 55
Ø 15.88
Ø 19.05
55 < Capacity ≤ 66
66 < Capacity ≤ 72
Ø 34.92
Ø 38.10
note3)
72 < Capacity ≤ 100
Ø 19.05
Ø 22.22
100 < Capacity ≤ 139
Ø 41.28
Ø 41.28
139 < Capacity ≤ 173
Ø 53.98
173 < Capacity ≤ 252
Ø 22.22
Ø 53.98
Ø 25.40
note1)
252 < Capacity
Ø 25.40
Ø 28.58
*Maximum pipe length : The pipe length between an outdoor unit and the farthest indoor
unit.
Note1) If Ø 25.40 pipe is not available on site, use Ø 28.58 pipe.
Note2) If Ø 31.75 pipe is not available on site, use Ø 34.92 pipe.
Note3) If Ø 38.10 pipe is not available on site, use Ø 41.28 pipe.
※
For the case that the diameter of the default pipe of an outdoor unit does not match that of
the pipe installed on the site, a socket is provided by default together with the outdoor unit.
Make a selection according to outdoor unit capacity.
Indoor unit capacity
(kW)
Pipe size (O.D. mm)
Liquid
Gas
6.0 and below
Ø 6.35
Ø 12.70
6.1 ~ 16.0
Ø 9.52
Ø 15.88
16.1 ~ 23.0
Ø 9.52
Ø 19.05
Over 23.0
Ø 9.52
Ø 22.22
Branch joint
Branch joint between outdoor units (C)
Classification
Model name
Specification (kW)
Y-joint for outdoor
unit (C)
MXJ-TA3419M
135.2 and below
MXJ-TA4122M
Over 135.2
First branch joint (D)
Make a selection according to outdoor unit capacity.
Classification
Model name of the branch joint
Outdoor unit capacity (kW)
Y-joint (D)
MXJ-YA1509M
15.0 and below
MXJ-YA2512M
15.1 ~ 40.0
MXJ-YA2812M
40.1 ~ 45.0
MXJ-YA2815M
45.1 ~ 70.3
MXJ-YA3419M
70.4 ~ 98.4
MXJ-YA4119M
98.5 ~ 135.2
MXJ-YA4422M
Over 135.2
Branch joint (E)
Select a branch joint according to the sum of indoor unit capacity which will be connected
after the branch.
※
However, if the size of the pipe between branch joints (E) is bigger than the size of the pipe
connected to the outdoor unit (D), apply the pipe size (D).
1) Y-joint
Classification
Model name
Specification (kW)
Y-joint (E)
MXJ-YA1509M
15.0 and below
MXJ-YA2512M
15.1 ~ 40.0
MXJ-YA2812M
40.1 ~ 45.0
MXJ-YA2815M
45.1 ~ 70.3
MXJ-YA3419M
70.4 ~ 98.4
MXJ-YA4119M
98.5 ~ 135.2
MXJ-YA4422M
Over 135.2
2) Distribution header
Classification
Model name
Specification (kW)
Distribution header (E)
MXJ-HA2512M
45.0 and below (for 4 rooms)
MXJ-HA3115M
70.3 and below (for 8 rooms)
MXJ-HA3819M
70.4 ~ 135.2
Size of the pipe between branch joints (B)
Select the pipe size according to the sum of indoor unit capacity which will be connected after
the branch.
※
However, if the size of the pipe between branch joints (B) is bigger than the size of the pipe
connected to the outdoor unit (A), apply the pipe size (A).
Indoor unit
capacity (kW)
Branch pipe length within 45m
Branch pipe length between
45~90m
Liquid (mm)
Gas (mm)
Liquid (mm)
Gas (mm)
Capacity ≤ 15
Ø 9.52
Ø 15.88
Ø 12.70
Ø 19.05
15 < Capacity ≤ 25
Ø 19.05
Ø 22.22
25 < Capacity ≤ 32
Ø 22.22
Ø 25.40
note1)
32 < Capacity ≤ 39
Ø 12.70
Ø 28.58
Ø 15.88
Ø 28.58
39 < Capacity ≤ 44
44 < Capacity ≤ 48
Ø 31.75
note2)
48 < Capacity ≤ 55
Ø 15.88
Ø 19.05
55 < Capacity ≤ 66
66 < Capacity ≤ 72
Ø 34.92
Ø 38.10
note3)
72 < Capacity ≤ 100
Ø 19.05
Ø 22.22
100 < Capacity ≤ 139
Ø 41.28
Ø 41.28
139 < Capacity ≤ 173
Ø 53.98
173 < Capacity ≤ 252
Ø 22.22
Ø 53.98
Ø 25.40
note1)
252 < Capacity
Ø 25.40
Ø 28.58
Note1) If Ø 25.40 pipe is not available on site, use Ø 28.58 pipe.
Note2) If Ø 31.75 pipe is not available on site, use Ø 34.92 pipe.
Note3) If Ø 38.10 pipe is not available on site, use Ø 41.28 pipe.