Mitsubishi Electric City Multi PUHY-EP1250YSNW-A, Installation Manual

Page: 40 / 60

GB-38
KJ79F137H01
The total length of each liquid piping is as follows:
ø12.7 total length: 40 (A)
ø9.52 total length: 10 (B) + 15 (C) + 10 (D) + 10 (a) + 5 (b) + 10 (e) = 60
ø6.35 total length: 10 (c) + 10 (d) = 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 × 0.11) + (60 × 0.054) + (20 × 0.021) + 0 + 3.5
= 11.6 kg (Fractions are rounded up.)
(2) Units "ft" and "oz"
<Formula>
・
When the piping length from the outdoor unit to the farthest indoor unit is 30.5 m (100 ft) or shorter
Amount of
additional
charge (oz)
=
ø3/4 total length
× 3.1 (oz/ft)
+
ø5/8 total length
× 2.15 (oz/ft)
+
ø1/2 total length
× 1.29 (oz/ft)
+
ø3/8 total length
× 0.65 (oz/ft)
+
ø1/4 total length
× 0.26 (oz/ft)
+
Outdoor unit
model
Amount (oz)
+
Total capacity of connected
indoor units
Amount (oz)
(E)P200 0 80 or below 71
(E)P250 0 81 to 160 89
(E)P300 0 161 to 330 106
(E)P350 0 331 to 390 124
(E)P400 0 391 to 480 160
(E)P450 0 481 to 630 177
(E)P500 0 631 to 710 212
* Amount of refrigerant to be
charged for single-module units
711 to 800 283
801 to 890 318
891 to 1070 353
1071 to 1250 424
1251 or above 494
・
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 (oz)
=
ø3/4 total length
× 2.80 (oz/ft)
+
ø5/8 total length
× 1.94 (oz/ft)
+
ø1/2 total length
× 1.19 (oz/ft)
+
ø3/8 total length
× 0.58 (oz/ft)
+
ø1/4 total length
× 0.23 (oz/ft)
+
Outdoor unit
model
Amount (oz)
+
Total capacity of connected
indoor units
Amount (oz)
(E)P200 0 80 or below 71
(E)P250 0 81 to 160 89
(E)P300 0 161 to 330 106
(E)P350 0 331 to 390 124
(E)P400 0 391 to 480 160
(E)P450 0 481 to 630 177
(E)P500 0 631 to 710 212
* Amount of refrigerant to be
charged for single-module units
711 to 800 283
801 to 890 318
891 to 1070 353
1071 to 1250 424
1251 or above 494
* When connecting PEFY-P50/63/71/80VMHS2-E, add 96 oz 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 : ø1/2; 131 ft
B : ø3/8; 32 ft
C : ø3/8; 49 ft
D : ø3/8; 32 ft
a : ø3/8; 32 ft
b : ø3/8; 16 ft
c : ø1/4; 32 ft
d : ø1/4; 32 ft