Mitsubishi Electric PWFY-P100VM-E-BU Data Book page 89

• 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
additional = ø28.58 total length
charge (kg) × 0.33 (kg/m)
Liquid pipe ø12.7
+ total length
× 0.11 (kg/m)
Total capacity of
outdoor units
EP200
+
EP250
EP300
EP350–900
Number of sub BC
controllers
+
1
2
Single
+
Combination
Amount of factory charged refrigerant
Outdoor unit
Charged amount
Model
EP200
8.5 kg
EP250
EP300
9.3 kg
EP350
EP400
EP450 11.8 kg
EP500
Limitation of the amount of refrigerant to be charged
The above calculation result of the amount of refrigerant to be charged must become below the value in the table below.
EP200 EP250
Outdoor unit model
YLM YLM
Maximum amount of
27.5kg 33.5kg
refrigerant *1
*1 Amount of additional refrigerant to be charged on site
High-pressure pipe
+ ø22.2 total length
× 0.21 (kg/m)
Liquid pipe ø9.52
+ total length
× 0.054 (kg/m)
Amount
(to be added for standard or
main BC controller)
3.0kg
4.5kg
4.5kg
6.0kg
Amount
(to be added for sub
BC controller)
1.0kg
2.0kg
Outdoor unit model
EP200 to EP250YLM
EP300 to EP350YLM
EP400 to EP500YLM
EP550YSLM
EP600 to EP700YSLM
EP750YSLM
EP800 to EP900YSLM
Sample calculation
Indoor 1: 50 A: ø28.58
2: 250 B: ø9.52
3: 15 C: ø12.70
4: 20 D: ø9.52
5: 140 E: ø9.52
6: 200 F: ø19.05
G: ø19.05
Outdoor EP700
EP300 EP350 EP400 EP450
YLM YLM YLM YLM
37.0kg 39.0kg 45.0kg 49.0kg
High-pressure pipe High-pressure pipe
+ ø19.05 total length + ø15.88 total length
× 0.14 (kg/m) × 0.1 (kg/m)
Liquid pipe ø6.35
+ total length
× 0.021 (kg/m)
Main BC controller
+
HA-type
Total capacity of connected
indoor units
80 or below
81 to 160
161 to 330
331 to 390
391 to 480
+
481 to 630
631 to 710
711 to 800
801 to 890
891 to 1070
1071 to 1250
1251 or above
Amount
(to be added for
outdoor unit)
0kg
0kg
1.0kg
0kg
0kg
1.0kg
2.0kg
The total length of each liquid line is as follows:
40m a: ø6.35 10m
ø28.58: A = 40 m
10m b: ø9.52 5m
ø19.05: F + G = 4 m
20m c: ø6.35 5m
ø12.70: C = 20 m
5m d: ø6.35 10m
ø9.52: B + D + E + b + e + f = 35 m
5m e: ø9.52 5m
ø6.35: a + c + d = 25 m
3m f: ø9.52 5m
Therefore,
1m
<Calculation example>
Additional refrigerant charge
EP500 EP550 EP600
YLM YSLM YSLM
49.0kg 59.0kg 62.5kg
- 81 -
Liquid pipe ø15.88
+ total length
× 0.18 (kg/m)
Amount
2.0kg
Amount
(to be added for
indoor unit)
2.0kg
2.5kg
3.0kg
3.5kg
4.5kg
5.0kg
6.0kg
8.0kg
9.0kg
10.0kg
12.0kg
14.0kg
= 40 × 0.33 + 4 × 0.14 + 20 × 0.11 + 35 × 0.054 + 25 × 0.021 + 6
+ 2 + 2 + 6
= 34.4 (34.375) kg
EP650 EP700 EP750 EP800
YSLM YSLM YSLM YSLM
75.0kg 79.5kg 79.5kg 79.5kg
EP850 EP900
YSLM YSLM
84.0kg 89.0kg