R410A DC Inverter VRF V4 Plus W Series 50Hz
MCAC-VTSM-2016-04
188 Installation
Table.4-9 Main unit multi-connective pipe assembly
Main unit Qty. Main unit connective pipe
diameter
Parallel connect with the branching pipes
Main pipe
2 units
g1, g2:
8, 10HP:
Φ
25.4/
Φ
12.7;
12HP:
Φ
31.8/
Φ
15.9
L:
FQZHW-02N1C
Refer to
Table 6-5
for main
pipe
dimension
3 units
g1, g2, g3:
8, 10HP:
Φ
25.4/
Φ
12.7;
12HP:
Φ
31.8/
Φ
15.9;
G1:
Φ
38.1/
Φ
19.1
L+M:
FQZHW-03N1C
Note: The pipe assemblies in above table is special for this model, must be purchased separately
4.7 Example
1) Take (10+8+8) HP that composed by three modules as an example to clarify the pipe selection.
2) Take Fig.4-4 as an example. Provided that the equivalent length of all pipes in this system is larger than
90m.
Table.4-10 Unit: mm
Indoor unit
capacity
A(
×
100W)
When branching
Pipe
’s length
≤
10m
When branching
Pipe
’s length
＞
10m
Gas side
Liquid side
Gas side
Liquid side
A
≤
45
Φ
12.7
Φ
6.4
Φ
15.9
Φ
9.5
A
≥
56
Φ
15.9
Φ
9.5
Φ
19.1
Φ
12.7
A. The branching pipe at the inside of the unit. There are a~j branching pipes at the inside of the unit, the
branching pipe diameter should be select as per Table 4-10.
B. Main pipe at the inside the unit (Refer to Table 1-4)
1) The main pipe L3 with N1, N2 downstream indoor units that total capacity is 71
×
2=142, the pipe L3
diameter is
Φ
15.9/
Φ
9.5,thus select FQZHN-01C for the branching pipe C.
2) The main pipe L4 with N3, N4 downstream indoor units that total capacity is 71
×
2=142, the pipe L3
diameter is
Φ
15.9/
Φ
9.5,thus select FQZHN-01C for the branching pipe D.
3) The main pipe L2 with N1~N4 downstream indoor units that total capacity is 71
×
4=284, the pipe L2
diameter is
Φ
22.2/
Φ
9.5,thus select FQZHN-02C for the branching pipe B.
4) The main pipe L7 with N6, N7 downstream indoor units that total capacity is 56+71=127, the pipe L7
diameter is
Φ
15.9/
Φ
9.5, thus select FQZHN-01C for the branching pipe G.
5) The main pipe L6 with N5
～
N7 downstream indoor units that total capacity is 56+71
×
2=282, the pipe L6
diameter is
Φ
19.1/
Φ
9.5, thus select FQZHN-01C for the branching pipe F.
6) The main pipe L9 with N9, N10 downstream indoor units that total capacity is 56
×
2=112, the pipe L9
diameter is
Φ
15.9/
Φ
9.5,thus select FQZHN-01C for the branching pipe I.
7) The main pipe L8 with N8
～
N10 downstream indoor units that total capacity is 112+56
×
2=224 the pipe L8
diameter is
Φ
19.1/
Φ
9.5, thus select FQZHN-01C for the branching pipe H.
8) The main pipe L5 with N5
～
N10 downstream indoor units that total capacity is 112+56
×
3+71
×
2=366, the
pipe L5 diameter is
Φ
28.6/
Φ
12.7, thus select FQZHN-03C for the branching pipe E.
9) The main pipe A with N1
～
N10 downstream indoor units that total capacity is 56
×
3+71
×
6+112=706, thus
select FQZHN-03Cfor the branching pipe A.
C Main pipe (Refer to Table 5-4, Table 5-5, Table 5-6):Main pipe L1 in the Fig.6-2, which upstream main units
total capacity is 10+8+8=26HP, based on table 6-5, the gas/liquid pipe diameter are
Φ
38.1/
Φ
22.2, total
capacity of the downstream indoor unit is 56
×
3+71
×
6+112=706, based on table 5-4, the gas/liquid pipe
diameter areΦ31.8/Φ19.1, take the large one for
