Mitsubishi Electric PUHY-P-YNW-A Série Manuel D'installation page 39

9-9-1. Calculation of the amount of additional refrigerant
・The amount of refrigerant to be added depends on the size and the total length of the liquid piping.
・Calculate the amount of refrigerant to be charged according to the formula below.
・Round up the calculation result to the nearest 0.1 kg (0.1 oz).
(1) Units "m" and "kg"
<Formula>
・When the piping length from the outdoor unit to the farthest indoor unit is 30.5 m (100 ft) or shorter
Amount of
ø19.05 total length
additional =
× 0.29 (kg/m)
charge (kg)
Outdoor unit
model
(E)P200
(E)P250
(E)P300
+
(E)P350
(E)P400
(E)P450
(E)P500
* Amount of refrigerant to be
charged for single-module units
・When the piping length from the outdoor unit to the farthest indoor unit is longer than 30.5 m (100 ft)
Amount of
ø19.05 total length
additional =
× 0.26 (kg/m)
charge (kg)
Outdoor unit
model
(E)P200
(E)P250
(E)P300
+
(E)P350
(E)P400
(E)P450
(E)P500
* Amount of refrigerant to be
charged for single-module units
* When connecting PEFY-P50/63/71/80VMHS2-E, add 2.7 kg of refrigerant per indoor unit.
* When connecting LEV kit (PAC-LV11M-J), additional refrigerant charge may be required. Contact your dealer for details.
<Example>
Outdoor unit model: P300
Total capacity of connected indoor units: 361
* Refer to the pipe connection examples in section 9-4 for the pipes marked with the letters below.
A : ø12.7; 40 m
B : ø9.52; 10 m
C : ø9.52; 15 m
D : ø9.52; 10 m
a : ø9.52; 10 m
b : ø9.52; 5 m
c : ø6.35; 10 m
d : ø6.35; 10 m
e : ø9.52; 10 m
KJ79F137H01
ø15.88 total length ø12.7 total length
+ +
× 0.2 (kg/m) × 0.12 (kg/m)
Total capacity of connected
Amount (kg)
indoor units
0 80 or below
0 81 to 160
0 161 to 330
0 331 to 390
0 391 to 480
+
0 481 to 630
0 631 to 710
711 to 800
801 to 890
891 to 1070
1071 to 1250
1251 or above
ø15.88 total length ø12.7 total length
+ +
× 0.18 (kg/m) × 0.11 (kg/m)
Total capacity of connected
Amount (kg)
indoor units
0 80 or below
0 81 to 160
0 161 to 330
0 331 to 390
0 391 to 480
+
0 481 to 630
0 631 to 710
711 to 800
801 to 890
891 to 1070
1071 to 1250
1251 or above
GB-37
ø9.52 total length ø6.35 total length
+ +
× 0.06 (kg/m) × 0.024 (kg/m)
Amount (kg)
2.0
2.5
3.0
3.5
4.5
5.0
6.0
8.0
9.0
10.0
12.0
14.0
ø9.52 total length ø6.35 total length
+ +
× 0.054 (kg/m) × 0.021 (kg/m)
Amount (kg)
2.0
2.5
3.0
3.5
4.5
5.0
6.0
8.0
9.0
10.0
12.0
14.0