Mitsubishi Electric City Multi PURY-HP-TNU-A Série Manuel D'installation page 28

・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 ø28.58
additional charge =
total length × 0.33 (kg/m)
(kg)
Liquid pipe ø12.7 total
+
length × 0.11 (kg/m)
Main or sub BC controller
J-type
+
JA-type
KA-type
KB-type
* When connecting PLFY-EP06NEMU-E**, PLFY-EP18NEMU-E**, or PLFY-EP36NEMU-E**, add 0.67 kg of refrigerant per indoor unit.
* When connecting PEFY-P06NMAU-E**, PEFY-P24NMAU-E**, or PEFY-P36NMAU-E**, add 0.55 kg of refrigerant per indoor unit.
<Example>
Outdoor unit 1 model: HP120
Outdoor unit 2 model: HP120
BC controller (Main) model: CMB-P108NU-JA1
BC controller (Sub) model: CMB-P104NU-KB1 × 4 units
Total capacity of connected indoor units: 206
* 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
I: ø9.52; 5 m
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
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 (A
1
ø9.52 total length: 10 (B) + 5 (C) + 5 (D) + 5 (E) + 5 (F) + 5 (G) + 5 (H) + 5 (I) + 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
WT09112X02
High-pressure pipe ø22.2
+
total length × 0.21 (kg/m)
Liquid pipe ø9.52 total
+
length × 0.054 (kg/m)
Amount (kg/unit)
1.5
3.0
4.7
0.4
) = 4
2
= 27.9 kg (Fractions are rounded up.)
High-pressure pipe ø19.05 High-pressure pipe ø15.88
+ +
total length × 0.14 (kg/m) total length × 0.1 (kg/m)
Liquid pipe ø6.35 total
+
length × 0.021 (kg/m)
Total capacity of connected indoor
units
27 or below
28 to 54
55 to 126
127 to 144
145 to 180
+
181 to 234
235 to 273
274 to 307
308 to 342
343 to 411
412 to 450
451 or above
GB-26
Liquid pipe ø15.88 total
+
length × 0.18 (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