4 - 45
S.D. Y
MEE15K022
3. Piping Design
YKB/YLM 2nd
A
B
C
D
e
a
b
c
d
Indoor
1: P125
40 m
10 m
2: P100
10 m
5 m
3: P40
15 m
10 m
4: P32
10 m
10 m
5: P63
10 m
The total length of liquid pipe of each size is as follows:
ø12.7: A + e = 40 + 10 = 50 m
A: ø12.7
a: ø9.52
b: ø9.52
c: ø6.35
d: ø9.52
e: ø12.7
B: ø9.52
C: ø9.52
D: ø9.52
ø9.52: B + C + D + a + b + d = 10 + 15 + 10 + 10 + 5 + 10 = 60 m
ø6.35: c = 10 = 10 m
Example: PUHY-P350YKB-A1
P40
P100
P125
P32
P63
=
+
+
+
+
+ 3.5
+
+
+
+
+ 3.5
+ 0
+ 0
(kg)
0 (m) x 0.26 (kg/m)
Additional
refrigerant charge
=
0
0
50
x 0.11
60
x 0.054
10
x 0.021
= 12.5 (12.45) kg
Total length of liquid
x 0.26 (kg/m)
0 (m) x 0.18 (kg/m)
Total length of liquid
x 0.18 (kg/m)
50 (m) x 0.11 (kg/m)
Total length of liquid
x 0.11 (kg/m)
60 (m) x 0.054 (kg/m)
Total length of liquid
x 0.054 (kg/m)
10 (m) x 0.021 (kg/m)
Total length of liquid
x 0.021 (kg/m)
Maximum refrigerant charge
Amount of factory charged refrigerant
There is a limit to the amount of refrigerant that can be charged into a unit. Regardless of the amount yielded by the formula above, observe the maximum
refrigerant charge in the table below.
8.0kg
6.5kg
11.5kg
11.8kg
P200
P250
P300
P350
P400
P450
P500
Outdoor unit
model
Charged amount
T
otal index of the outdoor units
P200
P250
P300
P350
P400
P450
P500
P400
P500
P550
P600
P650
P700
YKB-A1
YKB-A1
YKB-A1
YKB-A1
YKB-A1
YKB-A1
YKB-A1
YSKB-A1
YSKB-A1
YSKB-A1
YSKB-A1
YSKB-A1
YSKB-A1
Maximum refrigerant charge
Factory charged
kg
6.5
8.0
11.5
11.5
11.5
11.8
11.8
13.0
16.0
19.5
19.5
23.0
23.0
Charged on site
kg
15.8
21.7
21.2
22.1
25.7
33.2
34.1
32.0
31.0
31.8
34.4
33.5
45.9
Total for system
kg
22.3
29.7
32.7
33.6
37.2
45.0
45.9
45.0
47.0
51.3
53.9
56.5
68.9
P450
YSKB-A1
14.5
31.4
45.9
T
otal index of the outdoor units
P1100
P1200
P1250
P1300
P1350
YSKB-A1
P1050
YSKB-A1
P1000
YSKB-A1
P950
YSKB-A1
YSKB-A1
YSKB-A1
YSKB-A1
YSKB-A1
Maximum refrigerant charge
Factory charged
kg
31.0
34.5
34.5
Charged on site
kg
65.9
65.4
68.4
Total for system
kg
96.9
99.9
102.9
34.5
71.5
106.0
34.8
74.2
109.0
34.8
77.2
112.0
35.1
76.9
112.0
35.1
76.9
112.0
35.4
76.6
112.0
P1150
YSKB-A1
P750
P800
P850
P900
YSKB-A1
YSKB-A1
YSKB-A1
YSKB-A1
23.0
23.3
23.3
23.6
45.9
48.1
49.9
52.1
68.9
71.4
73.2
75.7
