-
25
-
Vertical length of 12.7 gas pipe size must be within 10m.
(3) Pipe size selection
Indoor unit
Outdoor unit
Branch pipe set at indoor side
Model: DIS
Branch pipe set at indoor side
Model: DIS
Header set at indoor side
Model: HEAD
Indoor unit
Fig.1
A
B
B
C
C
B
B
C
C
C
C
C
C
Outdoor unit
224
280
Liquid pipe size
Gas pipe size
Main pipe
(a) Main pipe (Between outdoor unit and initial branch at indoor unit side): Section A in Fig. 1
Pipe diameter between indoor
branch and main pipe
(Combined capacity of indoor units)
(b) Between the initial branch at indoor unit side and the indoor unit side: Section B in Fig. 1
(c) Between indoor unit branch and indoor unit: Section C in Fig. 1
ø6.4
ø9.5
ø12.7 ø15.9 ø19.1
ø19.1
ø22.2
ø22.2 ø25.4 ø28.6 ø31.8 ø34.7
ø9.5
ø12.7 ø15.9
Liquid pipe size
Gas pipe size
Indoor unit capacity
– 101 or less
Over 101 – 180 or less
Over 180 – 364 or less
ø6.4
ø9.5
ø12.7 ø15.9 ø19.1
ø19.1
ø22.2
ø22.2 ø25.4 ø28.6 ø31.8 ø34.7
ø9.5
ø12.7 ø15.9
*1
*1
*2
*2
*1
*1
*4
*5
*3
*3
*1. It cannot be used when the pipe length exceeds 90 m
.
*2. It cannot be used when the main pipe length exceeds 80 m
.
*3. It can be used when the capacity of indoor unit connected with
φ
φ
15.9 Gas pipe size is 44 or less and difference of height between the indoor units is within 10m.
It can be used when the capacity of indoor unit connected with
φ
12.7 Gas pipe size is 35 or less and difference of height between the indoor units is within 10m.
.
.
*4. It can be used when the capacity of indoor units connected at the down stream is higher than 280.
*6.
*5. It can be used when the capacity of indoor units connected at the down stream is higher than 335.
22
28
36
45
56
71
80
90
112
140
160
224
280
Indoor branch pipe
*6
*6
Indoor unit capacity
ø6.4
ø9.5
ø12.7 ø15.9 ø19.1
ø19.1
ø22.2
ø22.2 ø25.4 ø28.6 ø31.8 ø34.7
ø9.5
ø12.7 ø15.9
Liquid pipe size
Gas pipe size
WARNING
Make sure that the materials of existing pipes, pipe diameters and pipe wall thickness are
appropriate and that the design pressure (allowable pressure) is 3.24 MPa or higher.
●
When selecting pipe sizes to install additional indoor units, refer to the technical data of KXE6 SERIES.
Use C1220T-1/2H material for ø25.4 or larger.
#
'11 • KX-T-166
