15
Installation manual
5.6 Branch pipes for indoor unit
Based on Tab.5-7 and Tab.5-8, select the multi connection pipes
for the outdoor unit. Before installation, read the installation
manual for Outdoor Unit branch joints.
Unit: mm
Table.5-7 Outdoor unit multi-connective pipe assembly (Illustration)
Main pipe
g1, g2:
8~12HP: Φ25.4/Φ12.7;
14~22HP: Φ31.8/Φ15.9
L:
BJC-02-CM (i)
L+M:
BJC-03-CM(i)
L+M+N:
BJC-04-CM(i)
g1, g2, g3:
8~12HP: Φ25.4/Φ12.7;
14~22HP: Φ31.8/Φ15.9;
G1: Φ38.1/Φ19.1
g1, g2, g3, g4:
8~12HP: Φ25.4/Φ12.7;
14~22HP: Φ31.8/Φ15.9;
G1: Φ38.1/Φ19.1;
G2: Φ41.2/Φ22.2
5.7 Example
Liquid side
Gas side
Liquid side
Gas side
Indoor unit
capacity
A(×100W)
A≤45
A≥56
Φ12.7 Φ6.4
Φ15.9 Φ9.5 Φ19.1
Φ12.7
Φ15.9 Φ9.5
Table.5-9
Illustration
Outdoor
unit Qty.
2 units
3 units
4 units
Main pipe
Table.5-8 Outdoor unit multi-connective pipe assembly
Outdoor
unit Qty.
2 units
3 units
4 units
Outdoor unit connective
pipe diameter
Parallel connect
with the branch
joint assembly
Refer to
Table. 5-4
or 5-5 for
main
pipe’s
dimensions
Note: The pipe assemblies in the above table are special to this
model and must be purchased separately.
Take (22+12+12) HP with three modules as an example to
clarify pipe selection.
Take Fig.5-4 as an example, where the equivalent length of all
pipes is larger than 90 m.
When the branch
joint’s length ≤10 m
When the branch
joint’s length＞10 m
1)
2)
L
g1 g2
L
M
g1 g2
G1
g3
Main pipe
L
M
N
G2
G1
g1 g2 g3 g4
Main pipe
The branch joint in the inside of the unit.
There are a~m branch joints in the inside of the unit. The
branch joint diameter should be selected as per Tab. 5-9.
Main pipe inside the unit (Refer to Table. 5-3)
The main pipe L4 with N2, N3 downstream indoor units has a
total capacity of 140+71=211l. Pipe L4 diameter is Φ19.1/Φ
9.5. So, select BJF-224-CM(i) for branch joint D.
The main pipe L3 with N1~N3 downstream indoor units has a
total capacity of 140×2+71=351. Pipe L3 diameter is Φ28.6/ Φ
12.7. So, select BJF-710-CM(i) for branch joint C.
The main pipe L6 with N5, N6 downstream indoor units has a
total capacity is 140+28=168. Pipe L4 diameter is Φ19.1/Φ 9.5.
So, select BJF-224-CM(i) for branch joint F.
The main pipe L5 with N4~N6 downstream indoor units has a
total capacity of 140×2+28=308. Pipe L5 diameter is Φ22.2/ Φ
9.5. So, select BJF-330-CM(i) for branch joint E.
The main pipe L2 with N1~N6 downstream indoor units has a
total capacity of 140×4+71+28=659. Pipe L2 diameter is Φ
28.6/Φ15.9. So, select BJF-710-CM(i) for branch joint B.
A
B
1)
2)
3)
4)
5)
The main pipe L10 with N9, N10 downstream indoor units has
a total capacity of 71+28=99. Pipe L10 diameter is Φ15.9/Φ
9.5. So, select BJF-224-CM(i) for branch joint J.
The main pipe L9 with N8~N10 downstream indoor units has a
total capacity of 140+71+28=239. Pipe L9 diameter is Φ
22.2/Φ9.5. So, select BJF-330-CM(i) for branch joint I.
The main pipe L8 with N7~N10 downstream indoor units has a
total capacity of 140X2+71+28=379. Pipe L8 diameter is Φ
28.6/Φ12.7. So, select BJF-710-CM(i) for branch joint H.
The main pipe L12 with N12, N13 downstream indoor units
has a total capacity of 56×2=112. Pipe L12 diameter is Φ
15.9/Φ9.5. So, select BJF-224-CM(i) for branch joint L.
The main pipe L11 with N11~N13 downstream indoor units has
a total capacity of 140+56×2＝252. Pipe L11 diameter is Φ
22.2/Φ9.5. So, select BJF-330-CM(i) for branch joint K.
The main pipe L7 with N7~N13 downstream indoor units has a
total capacity of 140×3+71+56×2+28＝631, the pipe L7
diameter is Φ
28.6/Φ15.9. So, select BJF-710-CM(i) for branch
joint G.
The branch joint A with N1~N13 downstream indoor units has
a total capacity of 140×7+71×2+56×2+28×2＝1290. So, select
BJF-1344-CM(i) for branch joint A.
Example: parallel connection of three outdoor units 12+12+22
(total capacity 46 HP). The total capacity of the indoor units is
1,290, if the equivalent length of all pipes is ≥90 m. According
to Tab.5-5, the main pipe’s diameter is Φ38.1/Φ22.2. The
master unit’s diameter is Φ38.1/Φ19.1 based on Tab.5-3.
Select the largest. The main pipe’s diameter is Φ38.1/Φ22.2
6)
7)
8)
9)
10)
11)
12)
C
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