Mitsubishi Electric City Multi PURY-P72TNU-A-BS Manuel D'installation page 33

・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 ø1-1/8
additional charge = total length
(oz) × 3.54 (oz/ft)
Liquid pipe ø5/8 total
+ length
× 1.94 (oz/ft)
Main or sub BC controller
+
Total capacity of
outdoor units
Single
+
Combination
* When connecting PLFY-EP06NEMU-E**, PLFY-EP18NEMU-E**, or PLFY-EP36NEMU-E**, add 24 oz of refrigerant per indoor unit.
* When connecting PEFY-P06NMAU-E**, PEFY-P24NMAU-E**, or PEFY-P36NMAU-E**, add 20 oz of refrigerant per indoor unit.
<Example>
Outdoor unit 1 model: P120
Outdoor unit 2 model: P120
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: ø1-1/8; 131 ft
B: ø3/8; 32 ft
C: ø3/8; 16 ft
D: ø3/8; 16 ft
E: ø3/8; 16 ft
F: ø3/8; 16 ft
G: ø3/8; 16 ft
H: ø3/8; 16 ft
I: ø3/8; 16 ft
A : ø3/4; 9 ft
1
A : ø3/4; 3 ft
2
a: ø3/8; 32 ft
b: ø3/8; 16 ft
c: ø1/4; 16 ft
d: ø1/4; 32 ft
e: ø1/4; 16 ft
f: ø3/8; 16 ft
g: ø3/8; 16 ft
h: ø3/8; 16 ft
WT09106X03
High-pressure pipe ø7/8
+ total length
× 2.26 (oz/ft)
Liquid pipe ø1/2 total
+ length
× 1.19 (oz/ft)
Amount (oz/unit)
J-type 53
JA-type 106
KA-type 166
KB-type 15
Amount (oz)
(to be added for outdoor unit)
72 0
96 0
120 0
144 0
168 0
192 156
216 156
240 156
192 0
216 0
240 0
264 0
288 0
312 0
336 0
384 311
432 311
High-pressure pipe ø3/4 High-pressure pipe ø5/8
+ total length + total length
× 1.51 (oz/ft) × 1.08 (oz/ft)
Liquid pipe ø3/8 total Liquid pipe ø1/4 total
+ length + length
× 0.59 (oz/ft) × 0.23 (oz/ft)
Total capacity of connected
indoor units (to be added for indoor unit)
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-31
Amount (oz)
71
89
106
124
159
177
212
283
318
353
424
494