Mitsubishi Electric PWFY-P100VM-E-BU Data Book page 87

• 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
P200
+
P250
P300
P350–900
Number of sub BC
controllers
+
Single
+
Combination
Amount of factory charged refrigerant
Outdoor unit
Charged amount
Model
P200
9.5 kg
P250
P300
P350 10.3 kg
P400
P450
11.8 kg
P500
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.
P200 P250
Outdoor unit model
YLM-A1 YLM-A1
Maximum amount of
27.5kg 33.5kg
refrigerant *1
P800 P850
Outdoor unit model
YSLM-A1 YSLM-A1
Maximum amount of
79.5kg 84.0kg
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 1.0kg
2 2.0kg
Outdoor unit model
P200 to P250YLM-A1
P300 to P400YLM-A1
P450 to P500YLM-A1
P400 to P550YSLM-A1
P600 to P800YSLM-A1
P850YSLM-A1
P900YSLM-A1
Sample calculation
Indoor 1: 50 A: ø28.58
2: 250 B: ø9.52
3: 15 C:
4: 20 D:
5: 140 E: ø9.52
6: 200
F: ø19.05
G: ø19.05
Outdoor P700
P300 P350 P400 P450
YLM-A1 YLM-A1 YLM-A1 YLM-A1
37.0kg 39.0kg 45.0kg 49.0kg
P900
YSLM-A1
89.0kg
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
5.5kg
0kg
0kg
5.5kg
11.0kg
40m a: ø6.35 10m
10m b: ø9.52 5m
ø12.70 20m c: ø6.35 5m
ø9.52 5m d: ø6.35 10m
5m e: ø9.52 5m
3m f: ø9.52 5m
1m
P500 P400 P450
YLM-A1 YSLM-A1 YSLM-A1
49.0kg 52.0kg 52.0kg
- 79 -
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
The total length of each liquid line is as follows:
ø28.58: A = 40 m
ø19.05: F + G = 4 m
ø12.70: C = 20 m
ø9.52: B + D + E + b + e + f = 35 m
ø6.35: a + c + d = 25 m
Therefore,
<Calculation example>
Additional refrigerant charge
= 40 × 0.33 + 4 × 0.14 + 20 × 0.11 + 35 × 0.054 + 25 × 0.021 + 6
+ 2 + 2 + 6
= 34.4 (34.375) kg
P500 P550 P600 P650
YSLM-A1 YSLM-A1 YSLM-A1 YSLM-A1
52.0kg 59.0kg 62.5kg 75.0kg
P700 P750
YSLM-A1 YSLM-A1
79.5kg 79.5kg