Midea V6-i Series - Page 84

-I V6-i VRF 50Hz
83
Part 3
-
System Design and Installation
Figure 3-3.2: Permitted refrigerant piping lengths and level differences
Table 3-3.2: Summary of permitted refrigerant piping lengths and level differences
Permitted values
Piping in Figure 3-3.2
Piping lengths
Total piping length
1
≤ 150m
L1+L2+L3+L4+L5+a+b+c+d+e+f
Piping between farthest indoor unit
and outdoor unit
Actual length
≤ 100m
L1+L3+L5+f
Equivalent length
≤ 110m
Piping between farthest indoor unit and first indoor branch joint
3
≤ 40m
L3+L5+f
Pipe Length between the nearest branch and the indoor unit
≤15m
a,b,c,d,e,f
Level
differences
Largest level difference between
indoor unit and outdoor unit
4
Outdoor unit is above
≤ 50m
-
Outdoor unit is below
≤ 40m
-
Largest level difference between indoor units
5
≤15m
-
Notes:
1. Refer to Requirement 1, above.
2. Refer to Requirement 2, above.
3. Refer to Requirement 3, above.
4. Refer to Requirement 5, above.
5. Refer to Requirement 6, above.
When the outdoor unit connects to one indoor unit, the piping length and level difference requirements that apply are
summarized in Table 3-3.3.
Table 3-3.3: Summary of permitted refrigerant piping lengths and level differences connects to one indoor unit
The max height drop(m)
The length of refrigerant pipe(m)
The number of bends
Outdoor unit is above
Outdoor unit is below
25
20
50
≤ 10
Indoor unit
Outdoor unit
Level di
fference between indoor unit and outdoor unit
Piping between farthest indoor unit and
outdoor unit
Indoor auxiliary pipe
Piping between farthest indoor unit and
first indoor branch join
Level di
fference between indoor units
The first line Branch Pipe
a
N1
3N
5N
6
N
2
N
4
N
A
B
D
E
C
b
c
e
f
d
1L
2L
5L
3
L
4L
Legend
L1
Main pipe
L2 to L5
Indoor main pipes
a to f
Indoor auxiliary pipes
A to E
Indoor branch joints