Mitsubishi Electric CITY MULTI PURY-P72ZKMU-A Manuel D'installation page 28

(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)
Total capacity of outdoor
units
P72
+
P96
P120
P144–P288
Number of sub BC
controllers
+
1
2
* When connecting PLFY-P08NBMU-E2, add 0.3 kg of refrigerant per indoor unit.
・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)
Total capacity of outdoor
units
P72
+
P96
P120
P144–P288
Number of sub BC
controllers
+
1
2
* When connecting PLFY-P08NBMU-E2, add 0.3 kg of refrigerant per indoor unit.
<Example>
Outdoor unit 1 model: P120
Outdoor unit 2 model: P120
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; 65 ft
D: ø3/8; 16 ft
E: ø3/8; 16 ft
A : ø3/4; 9 ft
1
A : ø3/4; 3 ft
2
a: ø3/8; 32 ft
WT07828X01
High-pressure pipe ø7/8
+ +
total length × 2.48 (oz/ft)
Liquid pipe ø3/8 total
+ +
length × 0.65 (oz/ft)
Amount (oz)
(to be added for standard or main BC
controller)
106
160
160
212
Amount (oz)
Total capacity of
(to be added for
connected indoor units
sub BC controller)
35 27 or below
71 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
High-pressure pipe ø7/8
+ +
total length × 2.26 (oz/ft)
Liquid pipe ø3/8 total
+ +
length × 0.59 (oz/ft)
Amount (oz)
(to be added for standard or main BC
controller)
106
160
160
212
Amount (oz)
Total capacity of
(to be added for
connected indoor units
sub BC controller)
35 27 or below
71 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
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)
Main BC controller
+
HA-type
Amount (oz)
(to be added for Outdoor unit model
indoor unit)
71
Single
+
89
106
124 Combination
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)
Main BC controller
+
HA-type
Amount (oz)
(to be added for Outdoor unit model
indoor unit)
71
Single
+
89
106
124 Combination
159
177
212
283
318
353
424
494
Liquid pipe ø5/8 total
+
length × 2.16 (oz/ft)
Amount (oz)
71
Amount (oz)
(to be added for
outdoor unit)
P72 to P96 0
P120 to P144 195
P168 to P192 0
P216 195
P240 to P288 390
Liquid pipe ø5/8 total
+
length × 1.94 (oz/ft)
Amount (oz)
71
Amount (oz)
(to be added for
outdoor unit)
P72 to P96 0
P120 to P144 195
P168 to P192 0
P216 195
P240 to P288 390