Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
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4. Connection of Refrigerant Pipe
Refrigerant pipe sizing between indoor and outdoor unit.
Model
No.
Liquid /gas
pipe (mm)
Liquid Line Size - Outdoor unit higher than indoor unit
Total Equivalent Length (m)
7.62
15.24
22.86
30.48
38.10
45.72
54.86
Maximum Vertical Separation (m)
18
Φ
9.52/
Φ
15.9
7.62
15.24
22.86
30.48
38.10
45.72
45.72
24
Φ
9.52/
Φ
15.9
7.62
15.24
22.86
30.48
38.10
45.72
45.72
36
Φ
9.52/
Φ
15.9
7.62
15.24
22.86
30.48
38.10
45.72
45.72
48
Φ
9.52/
Φ
22
7.62
15.24
22.86
30.48
38.10
45.72
45.72
60
Φ
9.52/
Φ
22
7.62
15.24
22.86
30.48
38.10
45.72
45.72
Model
No.
Liquid /gas
pipe (mm)
Liquid Line Size - Outdoor unit lower than indoor unit
Total Equivalent Length (m)
7.62
15.24
22.86
30.48
38.10
45.72
54.86
Maximum Vertical Separation (m)
18
Φ
9.52/
Φ
15.9
7.62
15.24
17.98
17.37
16.76
16.15
15.54
24
Φ
9.52/
Φ
15.9
7.62
15.24
18.90
18.59
18.29
17.68
17.06
36
Φ
9.52/
Φ
15.9
7.62
15.24
22.86
18.90
18.59
17.98
17.37
48
Φ
9.52/
Φ
22
7.62
15.24
15.85
14.63
13.11
11.58
9.75
60
Φ
9.52/
Φ
22
7.62
15.24
14.33
12.50
10.36
8.53
6.70
Notes:
The maximum length of interconnecting line is 54.86m.
Always use the shortest length possible with a minimum number of bends.
Excessively long refrigerant lines cause loss of air conditioner capacity.
Keep the vertical lift to a minimum. Use the following guidelines when installing the unit:
1. Do not exceed the vertical lift as indicated on the table.