Midea V8 Series Engineering Data

V8 Mini R410A VRF 50Hz
88
Midea
V8 Mini
Series Engineering Data Book
7 Charging Refrigerant
7.1 Calculating Additional Refrigerant Charge
Calculate the additional charge amount of total refrigerant R(kg) according to the following formula:
R (kg) = R1 – 0.1 × N
R1 is the additional refrigerant charge quantity for liquid piping
N is the number of Arc Duct indoor units whose height is 199mm.
7.1.1 Calculating the additional refrigerant charge calculation for liquid piping (R1 kg)
The additional refrigerant charge calculation for liquid piping depends on the lengths and diameters of the outdoor and
indoor liquid pipes. Table 3-7.1 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 the additional charge
requirements for each of the outdoor and indoor liquid pipes, as in 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 R1 (kg) = L
1
(Φ6.35) × 0.022
+ L
2
(Φ9.52) × 0.057
+ L
3
(Φ12.7) × 0.110
+ L
4
(Φ15.9) × 0.170
7.1.2 Maximum refrigerant quantity limit of the system
The refrigerant quantity of system R
s
(kg) = R0 + R
R0 is factory refrigerant charge quantity
R is additional charge quantity amount of total refrigerant
Table 3-7.2: Factory refrigerant charge quantity R0 (unit: kg)
Model
120
140
160
R0(kg)
4.1
4.1
4.1
The maximum refrigerant quantity (R
s
) limit of the system is 14kg
Table 3-7.1: Additional refrigerant charge
Liquid side
piping (mm)
Additional refrigerant charge per
meter of equivalent length of
piping (kg)
Φ6.35
0.022
Φ9.52
0.057
Φ12.7
0.110
Φ15.9
0.170

Midea V8 Series Specifications

General

Brand	Midea
Model	V8 Series
Category	Air Conditioner
Language	English