Mitsubishi Electric City Multi PURY-HP-TNU-A Série Manuel D'installation page 29

(2) Units "ft" and "oz" (In an R2 system)
<Formula>
・When the piping length from the outdoor unit to the farthest indoor unit is 30.5 m (100 ft) or shorter
Amount of
High-pressure pipe ø1-1/8
additional charge =
total length × 3.88 (oz/ft)
(oz)
Liquid pipe ø1/2 total
+
length × 1.30 (oz/ft)
Main or sub BC
controller
J-type
+
JA-type
KA-type
KB-type
* In the case all connected indoor unit models are Case 1 or Case 2, do NOT add the refrigerant listed in table Ⓑ. Instead, add the following
amount of refrigerant.
Case 1: PLFY-EP06/18/36NEMU-E**
Case 2: PEFY-P06/24/36NMAU-E**
・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 × 3.54 (oz/ft)
(oz)
Liquid pipe ø1/2 total
+
length × 1.19 (oz/ft)
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 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: 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: 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
WT09112X02
High-pressure pipe ø7/8
+ +
total length × 2.48 (oz/ft)
Liquid pipe ø3/8 total
+ +
length × 0.65 (oz/ft)
Total capacity of
Amount (oz/unit)
connected indoor units
53 27 or below
106 28 to 54
166 55 to 126
15 127 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
High-pressure pipe ø7/8
+ +
total length × 2.26 (oz/ft)
Liquid pipe ø3/8 total
+ +
length × 0.59 (oz/ft)
Amount (oz/unit)
53
106
166
15
+
GB-27
High-pressure pipe ø3/4 High-pressure pipe ø5/8
+
total length × 1.73 (oz/ft) total length × 1.19 (oz/ft)
Liquid pipe ø1/4 total
length × 0.26 (oz/ft)
Amount (oz)
(to be added for
indoor unit)
71
89
106
124
159
+
177
212
283
318
353
424
494
High-pressure pipe ø3/4 High-pressure pipe ø5/8
+
total length × 1.51 (oz/ft) total length × 1.08 (oz/ft)
Liquid pipe ø1/4 total
length × 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
Liquid pipe ø5/8 total
+
length × 2.16 (oz/ft)
Ⓑ
Total capacity of
Amount (oz)
outdoor units
72 53
96 53
120 106
144 89
168 142
192 142
216 159
240 177
264 89
288 53
312 71
336 71
Liquid pipe ø5/8 total
+
length × 1.94 (oz/ft)
Amount (oz)
71
89
106
124
159
177
212
283
318
353
424
494