Mitsubishi Electric CITY MULTI PURY-HP-TNU-A1 Manuel D'installation page 31

(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-EP06/18/24/36NEMU-E**
→ Add 24 oz per PLFY-EP06/18/24/36NEMU-E**.
Case 2: PEFY-P06/18/24/30/36NMAU-E**
→ Add 20 oz per PEFY-P06/18/24/30/36NMAU-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
+
KA-type
KB-type
* When connecting PLFY-EP06NEMU-E**, PLFY-EP18NEMU-E**, PLFY-EP24NEMU-E**, or PLFY-EP36NEMU-E**, add 24 oz of refrigerant
per indoor unit.
* When connecting PEFY-P06NMAU-E**, PEFY-P18NMAU-E**, PEFY-P24NMAU-E**, PEFY-P30NMAU-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-JA2
BC controller (Sub) model: CMB-P104NU-KB2 × 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
WT10508X02
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
166
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)
J-type 53
JA-type 106
166
15
High-pressure pipe ø3/4
+
total length × 1.73 (oz/ft)
Liquid pipe ø1/4 total
+
length × 0.26 (oz/ft)
Amount (oz)
(to be added for
indoor unit)
71
28 to 54 89
55 to 126 106
124
159
177
212
283
318
353
424
494
High-pressure pipe ø3/4
+
total length × 1.51 (oz/ft)
Liquid pipe ø1/4 total
+
length × 0.23 (oz/ft)
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-29
High-pressure pipe ø5/8 Liquid pipe ø5/8 total
+ +
total length × 1.19 (oz/ft) length × 2.16 (oz/ft)
Ⓑ
Total capacity of
Amount (oz)
outdoor units
72
96
120
144
168
+
192
216
240
264
288
312
336
High-pressure pipe ø5/8 Liquid pipe ø5/8 total
+ +
total length × 1.08 (oz/ft) length × 1.94 (oz/ft)
Amount (oz)
(to be added for indoor unit)
71
89
106
124
159
177
212
283
318
353
424
494
53
53
106
89
142
142
159
177
89
53
71
71