SiE33-003
Appendix
General Information
99
Calculating
Refrigerant Charge
Calculate the charge of refrigerant needed as described below, and add accordingly.
Record your calculations for use by aftercare service.
Full Refrigerant
Recharging
The amount of refrigerant needed to completely recharge the system equals to that of the refrigerant
charge at factory set (marked on name plate) plus the above additional charge.
Extracting
Refrigerant
Open the stop valves on both the gas line and liquid line, and extract the refrigerant from the service ports.
Example of refrigerant branch using REFNET joint for RSXYP28
Example of refrigerant branch using REFNET joint and REFNET header for RSXYP28
Example of refrigerant branch using REFNET header for RSXYP28
Total length of liquid line piping (
φ
22.2)
Total length of liquid line piping (
φ
19.1)
Total length of liquid line piping (
φ
12.7)
+
+
+
+
+
+
Total length of liquid line piping (
φ
6.4)
Total length of liquid line piping (
φ
5.9)
Total length of liquid line piping (
φ
9.5)
0 :RSXYP16,18,24,28
0.4:RSXYP30
0.6:RSXYP26
0.8:RSXYP20
(V1144)
H3
H1
H2
C
D
E
F
G
B
A
a
b
c
d
e
f
g
p
n
m
l
k
j
i
h
8
7
6
5
4
3
2
1
Outdoor unit
REFNET joint (A-G)
Indoor units (1-8)
Q
(V1057)
a :
φ
22.2 × 10m
b :
φ
22.2 × 2m
c :
φ
22.2 × 5m
d :
φ
19.5 × 5m
e :
φ
15.9 × 5m
f :
φ
12.7 × 5m
g :
φ
9.5 × 5m
h :
φ
9.5 × 5m
i :
φ
6.4 × 5m
j :
φ
6.4 × 5m
k :
φ
6.4 × 5m
l :
φ
9.5 × 5m
m :
φ
6.4 × 5m
n :
φ
6.4 × 5m
p :
φ
6.4 × 5m
R = 17 × 0.39 + 5 × 0.28 + 5 × 0.19 + 5 × 0.12
↑ ↑ ↑
↑
a+b+c d e f
+ 15 × 0.06 + 30 × 0.023 + 0
↑ ↑
g+h+l i+j+k+m+n+p
= 6 . 6 3 + 1.4 + 0.95 + 0.6 + 0.9 + 0.69 + 0 = 11.17kg
ò
11.2kg
(V1145)
H3
H2
H1
Q
a
b
c
d
e
f
g
h
i
B
A
j
k
7
1
2
3
4
5
6
8
Outdoor unit
Refnet header
REFNET joint (A-B)
Indoor units (1-8)
(V1058)
a :
φ
22.2 × 30m
b :
φ
15.9 × 10m
c :
φ
9.5 × 10m
d :
φ
9.5 × 10m
e :
φ
9.5 × 10m
f :
φ
9.5 × 10m
g :
φ
6.4 × 10m
h :
φ
6.4 × 20m
i :
φ
12.7 × 10m
j :
φ
6.4 × 10m
k :
φ
6.4 × 9m
R = 30 × 0.39 + 10 × 0.19 + 10 × 0.12
↑ ↑ ↑
a b i
+ 40 × 0.06 + 49 × 0.023 + 0 = 18.32
↑ ↑
ò
c+d+e+f g+h+j+k 18.3kg
(V1157)
H3
H1
H2
Q
a
c
d
e
f
g
h
i
2
3
4
5
6
7
b
1
8
Outdoor unit
REFNET header
Indoor units (1-8)
(V1059)
a :
φ
22.2 × 20m
b :
φ
9.5 × 10m
c :
φ
9.5 × 10m
d :
φ
6.4 × 20m
e :
φ
6.4 × 10m
f :
φ
6.4 × 23m
g :
φ
6.4 × 20m
h :
φ
6.4 × 20m
i :
φ
6.4 × 30m
R = 20 × 0.39 + 20 × 0.06 + 123×0.023
↑ ↑ ↑
a b+c d+e+f+g+h+i
= 7.8 + 1.2 + 2.83 = 11.83
ò
11.8kg
(V1146)
Si33-003.book Page 99 Monday, June 25, 2001 9:06 AM
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