3. Piping Design
YKB/YLM 2nd
4 - 106
S.D. R2
MEE15K022
Amount of factory charged refrigerant
The above calculation result of the amount of refrigerant to be charged must become below the value in the table below.
Outdoor unit
Model
P250
P300
P400
P450
P350
P500
P200
Charged amount
10.3 kg
11.8 kg
9.5 kg
Limitation of the amount of refrigerant to be charged
Sample calculation
Indoor
Outdoor
A:
ø28.58
40m
1: 50
a:
ø6.35
B:
ø9.52
10m
2: 250
b:
ø9.52
C:
3: 15
c:
ø6.35
ø12.70
20m
4: 20
d:
ø6.35
D:
5: 140
e:
ø9.52
ø9.52
5m
6: 200
P700
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 × 0.1
1 + 35 × 0.054 + 25 × 0.021 + 6
+ 2 + 2 + 6
= 34.4 (34.375) kg
f:
ø9.52
E:
ø9.52
5m
F:
ø19.05
3m
10m
5m
5m
10m
5m
5m
G:
ø19.05
1m
• When the piping length from the outdoor unit to the farthest indoor unit is longer than 30.5 m (100 ft)
Amount of
additional
charge (kg)
=
High-pressure pipe
ø28.58 total length
× 0.33 (kg/m)
+
High-pressure pipe
ø22.2 total length
× 0.21 (kg/m)
+
High-pressure pipe
ø19.05 total length
× 0.14 (kg/m)
+
High-pressure pipe
ø15.88 total length
× 0.1 (kg/m)
+
Liquid pipe ø15.88
total length
× 0.18 (kg/m)
+
Liquid pipe ø12.7
total length
× 0.11 (kg/m)
+
Liquid pipe ø9.52
total length
× 0.054 (kg/m)
+
Liquid pipe ø6.35
total length
× 0.021 (kg/m)
+
T
otal capacity of
outdoor units
Amount
(to be added for standard or
main BC controller)
+
Main BC controller
Amount
P200
3.0kg
HA-type
2.0kg
P250
4.5kg
P300
4.5kg
P350–900
6.0kg
+
Number of sub BC
controllers
Amount
(to be added for sub
BC controller)
+
Total capacity of connected
indoor units
Amount
(to be added for
indoor unit)
1
1.0kg
80 or below
2.0kg
2
2.0kg
81 to 160
2.5kg
161 to 330
3.0kg
331 to 390
3.5kg
391 to 480
4.5kg
481 to 630
5.0kg
631 to 710
6.0kg
711 to 800
8.0kg
801 to 890
9.0kg
891 to 1070
10.0kg
1071 to 1250
12.0kg
1251 or above
14.0kg
Outdoor unit model
Amount
(to be added for
outdoor unit)
Single
P200 to P250YLM-A1
0kg
P450 to P500YLM-A1
Combination
P400 to P550YSLM-A1
0kg
P600 to P800YSLM-A1
0kg
P850YSLM-A1
5.5kg
5.5kg
P900YSLM-A1
11.0kg
+
P300 to P400YLM-A1
0kg
T
otal index of the outdoor units
P200
P250
P300
P350
P400
P450
P500
P400
P500
P550
P600
P650
P700
YLM
YLM
YLM
YLM
YLM
YLM
YLM
YSLM
YSLM
YSLM
YSLM
YSLM
YSLM
Maximum refrigerant charge
Factory charged
kg
9.5
9.5
10.3
10.3
10.3
11.8
11.8
19.0
19.0
19.8
20.6
20.6
20.6
Charged on site
kg
27.5
33.5
37.0
39.0
45.0
44.2
44.2
52.0
52.0
59.0
62.5
75.0
75.0
T
otal for system
kg
37.0
43.0
47.3
49.3
55.3
56.0
56.0
71.0
71.0
78.8
83.1
95.6
95.6
Maximum refrigerant charge
Factory charged
oz
335
335
363
363
363
416
416
670
670
698
727
727
727
Charged on site
oz
970
1182
1305
1376
1587
1559
1559
1834
1834
2081
2205
2646
2646
T
otal for system
oz
1305
1517
1668
1739
1951
1975
1975
2504
2504
P450
YSLM
19.0
52.0
71.0
670
1834
2504
2780
2931
3372
3372
T
otal index of the outdoor units
P750
P800
P850
P900
YSLM
YSLM
YSLM
YSLM
Maximum refrigerant charge
Factory charged
kg
20.6
20.6
22.1
23.6
Charged on site
kg
75.0
78.4
76.9
75.4
T
otal for system
kg
95.6
99.0
99.0
99.0
Maximum refrigerant charge
Factory charged
oz
727
727
780
832
Charged on site
oz
2646
2765
2713
2660
T
otal for system
oz
3372
3492
3492
3492
