Mitsubishi Electric PLA-RP-BA3 Technical Data Book page 73

Pipe diameter and thickness
OD
6.35 9.52 12.7
(mm)
Thickness
0.8 0.8 0.8
(mm)
Be sure to use hard (tempered) one for pipe over 19.05(RP250)/ 22.2(RP200).(Do not use soft (annealed) one.)
B
D
<Table 6> Lowered cooling capacity by the smaller gas pipe diameter
Pipe length
5m and less
6~10m
11~20m
21~30m
31~40m
41~50m
<Table 7> Additional refrigerant amount when the liquid pipe of the larger diameter is used.
(Single /Simultaneous Twin / Simultaneous Triple / Simultaneous Quadruple)
Capacity When the extension pipe length (main piping + branch piping) exceeds 20m
RP200, RP250 Additional refrigerant amount
L : 15.88 liquid pipe (m) L
1 2
L : 9.52 liquid pipe (m) L
3 4
If the calculation produces a negative number (i.e. a "minus" charge), additional charging is not necessary.
( W 0)
<Table 8>
Permissible total
Outdoor unit piping length
A+B+C+D+E
RP200
120 m and less
PR250
<Table 9>
B-C or B-D or
Outdoor unit B-E or C-D or
C-E or D-E
RP200
8 m and less
RP250
15.88 19.05 22.2 25.4 28.58
1.0 1.0 1.0 1.0 1.0
C
E
A
Cooling capacity ratio
gas pipe 22.2
100%
100~95%
95~88%
88~83%
83~79%
79~75%
W(g)=(180 L
: 12.7 liquid pipe (m)
: 6.35 liquid pipe (m)
A+B or A+C
or
A+D or A+E
100 m and less
Number of
pipe bends
Within 15
31.75
1.1
Indoor unit
Outdoor unit
1 Height difference (Indoor unit-
Main piping
Outdoor unit) Max. 30 m
Branch piping
Multi distribution
Height difference (Indoor unit-
2
pipe (option)
Indoor unit) Max. 1 m
3 Distance between indoor and indoor units
pipe length. Max. 8m
B—C B—D B—E
C—D C—E D—E
4 Number of pipe bends
Within 15 points
8 points between main pipe A and
each branch pipe (B, C, D, E).
gas pipe 19.05
100%
100~88%
88~77%
)+(120 L ) (90 L )+(30 L
1 2 3 4
Charge-less
piping length
A+B+C+D+E
30 m and less
73
)-3000