22
OD
(mm)
Pipe diameter and thickness
[
6.35
0.8
Be sure to use hard (tempered) one for pipe over
[
22.2.(Do not use soft (annealed) one.)
0.8
0.8
1.0
1.0
1.0
1.0
1.0
[
9.52
[
12.7
[
15.88
[
19.05
[
22.2
[
25.4
[
28.58
1.1
[
31.75
Thickness
(mm)
1
4 Number of pipe bends
Within 15
points8 points between main pipe A and
each branch pipe (B, C, D, E).
2
3 Distance between indoor and indoor units
pipe length.
B—C B—D B—E
C—D C—E D—E
1
Indoor unit
2
Outdoor unit
3
Main piping
4
Branch piping
5
Multi disttibution
pipe (option)
E
A
1
B
C
1
4
4
4
3
5
2
2
Height difference (Indoor unit-
Outdoor unit) Max. 40 m
Height difference (Indoor unit-
Indoor unit) Max. 1 m
D
1
4
1
1
<Table 6> Lowered cooling capacity by the smaller gas pipe diameter
5m and less
6~10m
11~20m
21~30m
31~40m
41~50m
100%
100~96%
96~91%
91~86%
86~83%
83~80%
100%
100~91%
91~81%
Pipe length
gas pipe
[
22.2
gas pipe
[
19.05
RP10 Cooling capacity ratio
RP8 Cooling capacity ratio
100%
100~98%
98~94%
94~91%
91~88%
88~86%
100%
100~95%
95~88%
gas pipe
[
25.4
gas pipe
[
22.2
<Table 7> Additional refrigerant amount when the liquid pipe of the larger diameter is used.
(Single /Simultaneous Twin / Simultaneous Triple / Simultaneous Quadruple)
<Table 8>
<Table 9>
Additional refrigerant amount W(g)=(180
o
L
1
)+(120
o
L
2
) (90
o
L
3
)+(30
o
L
4
)-3000
When the extension pipe length (main branch piping) exceeds 20m
Capacity
RP8, RP10
L
1
:
[
15.88 liquid pipe (m)
L
2
:
[
12.7 liquid pipe (m)
L
3
:
[
9.52 liquid pipe (m)
L
4
:
[
6.35 liquid pipe (m)
If the calculation produces a negative number (i.e. a "minus" charge), additional charging is not necessary.
( W
[
0)
Permissible total
A+B or A+C
Charge-less
Outdoor unit
piping length
or
piping length
A+B+C+D+E
A+D or A+E
A+B+C+D+E
RP8
80 m and less
80 m and less
30 m and less
PR10
B-C or B-D or
Outdoor unit
B-E or C-D or
Number of
pipe bends
C-E or D-E
RP8
8 m and less
Within 15
RP10
OC317-1.qxp 04.11.26 9:33 AM Page 22
