Midea ATOM MDV-V28WDHN1

-I Atom B Series VRF 50/60Hz
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Part 3 - System Design and Installation
Tables 3-3.8, specify the max difference, the length of refrigerant pipe and the number of bends When the outdoor unit
connects one indoor unit.
Table 3-3.8: Summary of permitted refrigerant piping lengths and level differences (only one indoor unit)
Model(kBtu/h)
The max height drop
The length of
refrigerant
pipe(m)
The number
of bends
Outdoor units is up
Outdoor units is down
28
10
10
20
Less than 10
36
20
20
40
42
20
20
40
48
30
20
60
56
30
20
60
3.6 Refrigerant Amount to be Added
The Calculate the amount of the R410A refrigerant to be added based on the diameter and length of the liquid pipes of the
ODU and IDUs.
When the outdoor unit connects 1 indoor unit:
Table 3-3.9:
Liquid Side Piping
Diameter (mm)
Refrigerant to be Added
Per Meter Piping (kg)
Φ6.4
0.022
Φ9.5
0.054
Φ12.7
0.110
Φ15.9
0.170
Branch joint refrigerant added amount:
Table 3-3.10:
Code
Liquid Side Piping
Diameter (mm)
Refrigerant to be Added (kg)
A
DXFQT2-02
Equal to 0.5m length of
liquid piping
B
DXFQT3-02
Equal to 1m length of
liquid piping
C
DXFQT4-02
Equal to 1m length of
liquid piping
D
DXFQT5-02
Equal to 1m length of
liquid piping
E
DXFQT6-02
Equal to 1m length of
liquid piping