3. Piping Design
YKB/YLM 2nd
4 - 108
S.D. R2
MEE15K022
Amount of factory charged refrigerant
Outdoor unit
Model
EP250
EP400
EP450
EP500
EP200
Charged amount
11.8 kg
10.5 kg
6.0 kg
EP300
EP350
8.0 kg
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
EP700
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
The above calculation result of the amount of refrigerant to be charged must become below the value in the table below.
Limitation of the amount of refrigerant to be charged
• 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
EP200
3.0kg
HA-type
2.0kg
EP250
4.5kg
EP300
4.5kg
EP350–900
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
EP200 to EP250YLM-A1
0kg
EP400 to EP500YLM-A1
1.0kg
Combination
EP550YSLM-A1
0kg
EP600 to EP700YSLM-A1
EP800 to EP900YSLM-A1
0kg
EP750YSLM-A1
1.0kg
2.0kg
EP300 to EP350YLM-A1
0kg
EP200
EP250
EP300
EP350
EP400
EP450
EP500
EP500
EP550
EP600
EP650
EP700
EP750
EP800
6.0
6.0
8.0
8.0
10.5
11.8
11.8
27.5
33.5
37.0
39.0
45.0
44.2
44.2
33.5
39.5
45.0
47.0
55.5
56.0
56.0
212
212
282
282
370
416
416
970
1182
1305
1376
1587
1559
1559
1182
1393
1587
1658
1958
1975
1975
EP850
EP900
T
otal index of the outdoor units
YLM
YLM
YLM
YLM
YLM
YLM
YLM
YSLM
YSLM
YSLM
YSLM
YSLM
YSLM
Maximum refrigerant charge
Factory charged
kg
12.0
16.0
16.0
16.0
18.5
21.0
Charged on site
kg
52.0
62.5
75.0
78.0
78.0
78.0
T
otal for system
kg
64.0
78.5
91.0
94.0
96.5
99.0
Maximum refrigerant charge
Factory charged
oz
423
564
564
564
653
741
Charged on site
oz
1834
2205
2646
2751
2751
2751
T
otal for system
oz
2258
2769
YSLM
14.0
59.0
73.0
494
2081
2575
3210
3316
3404
3492
T
otal index of the outdoor units
YSLM
YSLM
Maximum refrigerant charge
Factory charged
kg
22.3
23.6
Charged on site
kg
76.7
75.4
T
otal for system
kg
99.0
99.0
Maximum refrigerant charge
Factory charged
oz
787
832
Charged on site
oz
2706
2660
T
otal for system
oz
3492
3492
