Mitsubishi Electric CITY MULTI PURY-P-YNW-A2 Installation Manual page 40

・When the piping length from the outdoor unit to the farthest indoor unit is longer than 30.5 m (100 ft)
Amount of High-pressure pipe
additional = ø34.93 total length
charge (kg) × 0.52 (kg/m)
Liquid pipe ø19.05
+ total length
× 0.26 (kg/m)
Main or sub BC
controller
J(1)-type
+
JA(1)-type
KA(1)-type
KB(1)-type
* When the piping length from the outdoor unit to the farthest indoor unit is longer than 30.5 m (100 ft), additional refrigerant charge shown in
"Additional refrigerant charge" is not necessary.
* Contact your dealer for the amount of refrigerant to be added when connecting CMB-P**-V-G1, CMB-P**-V-GA1, CMB-P**-V-HA1, CMB-P**-
V-GB1, or CMB-P**-V-HB1.
* When connecting LEV kit (PAC-LV11M-J), additional refrigerant charge may be required. Refer to the installation manual of the LEV kit.
<Example>
Outdoor unit 1 model: EP300YNW
Outdoor unit 2 model: EP300YNW
BC controller (Main) model: CMB-M108V-JA1
BC controller (Sub) model: CMB-M104V-KB1 × 4 units
Total capacity of connected indoor units: 530
* Refer to the pipe connection examples in section 9-4 for the pipes marked with the letters below.
A: ø28.58; 40 m
B: ø9.52; 10 m
C: ø9.52; 5 m
D: ø9.52; 5 m
E: ø9.52; 5 m
F: ø9.52; 5 m
G: ø9.52; 5 m
H: ø9.52; 5 m
J: ø9.52; 5 m
The total length of the high-pressure piping and liquid piping in each case is as follows:
ø28.58 total length: 40 (A)
ø19.05 total length: 3 (A
1
ø9.52 total length: 10 (B) + 5 (C) + 5 (D) + 5 (E) + 5 (F) + 5 (G) + 5 (H) + 5 (J) + 10 (a) + 5 (b) + 5 (f) + 5 (g) + 5 (h) = 75
ø6.35 total length: 5 (c) + 10 (d) + 5 (e) = 20
Therefore, when the piping length from the outdoor unit to the farthest indoor unit is longer than 30.5 m (100 ft),
Amount of additional charge = (40 × 0.33) + (4 × 0.14) + (75 × 0.054) + (20 × 0.021) + 3.0 + (0.4 × 4) + 5
WT09973X01
High-pressure pipe
+ ø28.58 total length
× 0.33 (kg/m)
Liquid pipe ø15.88
+ total length
× 0.18 (kg/m)
Amount (kg/unit)
1.5
3.0
4.7
0.4
A : ø19.05; 3 m
1
A : ø19.05; 1 m
2
a: ø9.52; 10 m
b: ø9.52; 5 m
c: ø6.35; 5 m
d: ø6.35; 10 m
e: ø6.35; 5 m
f: ø9.52; 5 m
g: ø9.52; 5 m
h: ø9.52; 5 m
) + 1 (A ) = 4
2
= 27.9 kg (Fractions are rounded up.)
High-pressure pipe High-pressure pipe
+ ø22.2 total length + ø19.05 total length
× 0.21 (kg/m) × 0.14 (kg/m)
Liquid pipe ø12.7 Liquid pipe ø9.52
+ total length + total length
× 0.11 (kg/m) × 0.054 (kg/m)
Total capacity of connected
indoor units
80 or below
81 to 160
161 to 330
331 to 390
391 to 480
+
481 to 630
631 to 710
711 to 800
801 to 890
891 to 1070
1071 to 1250
1251 or above
39
High-pressure pipe
+ ø15.88 total length
× 0.1 (kg/m)
Liquid pipe ø6.35
+ total length
× 0.021 (kg/m)
Amount (kg)
(to be added for
indoor unit)
2.0
2.5
3.0
3.5
4.5
5.0
6.0
8.0
9.0
10.0
12.0
14.0