Midea V6R Series User Manual

V6R VRF 50/60Hz
168
Midea
V6R
Series Engineering Data Book
8 Charging Refrigerant
8.1 Calculating Additional Refrigerant Charge
Based on the field installed refrigerant pipe and system layout, additional refrigerant charge may be required. Please add
additional refrigerant according to the calculation below. Record the size of each liquid pipe from outdoor unit to indoor
units. Record the amount of refrigerant that was charged on the outdoor unit for future reference.
The additional refrigerant charge depends on outdoor unit model, MS model and the lengths and diameters of the outdoor
and indoor liquid pipes. Table 3-8.1 shows the additional refrigerant charge R1 required each V6R outdoor unit for models.
Table 3-8.1: Additional refrigerant charge R1 -V6R outdoor unit
Outdoor unit model
Additional refrigerant charge per model (kg)
8HP
2
10HP
2
12HP
2.6
14HP
4.9
16HP
5.5
18HP
5.7
20HP
5.7
Table 3-8.2shows the additional refrigerant charge requirement each MS box for different MS box models. The additional
charge requirement for the MS box is obtained by summing all the MS box, through the following formula, which M
1
to M
6
represent the number of MS box of each different model.
Additional refrigerant charge R
2
(kg) = M
1
× 0.1
+ M
2
× 0.5
+ M
3
× 0.5
+ M
4
× 1.0
+ M
5
× 1.0
+ M
6
× 1.0
Table 3-8.1 shows the additional refrigerant charge required per meter of equivalent pipe length for different diameters of
pipe. The total additional refrigerant charge is obtained by summing all the outdoor and indoor liquid pipes, through the
following formula, where L
1
to L
8
represent the equivalent lengths of the pipes of different diameters. Assume 0.5m for the
equivalent pipe length of each branch joint.
Additional refrigerant charge R3 (kg) = L
1
(Φ6.35) × 0.022
+ L
2
(Φ9.53) × 0.057
+ L
3
(Φ12.7) × 0.110
+ L
4
(Φ15.9) × 0.170
+ L
5
(Φ19.1) × 0.260
+ L
6
(Φ22.2) × 0.360
+ L
7
(Φ25.4) × 0.520
+ L
8
(Φ28.6) × 0.680
Calculate the total additional refrigerant charge amount to be charged according to the formula R (kg) = R1 + R2 +R3.
Table 3-8.2: Additional refrigerant charge – MS box
Model
Additional refrigerant charge per
box (kg)
MS01/N1-D
0.1
MS04/N1-D
0.5
MS06/N1-D
MS08/N1-D
1.0
MS10/N1-D
MS12/N1-D
Table 3-8.3: Additional refrigerant charge-liquid pipes
Liquid side
piping (mm)
Additional refrigerant charge per
meter of equivalent length of
piping (kg)
Φ6.35
0.022
Φ9.53
0.057
Φ12.7
0.110
Φ15.9
0.170
Φ19.1
0.260
Φ22.2
0.360
Φ25.4
0.520
Φ28.6
0.680

Midea V6R Series Specifications

General

Brand	Midea
Model	V6R Series
Category	Air Conditioner
Language	English