Mitsubishi Electric PUHY-RP-Y(S)JM-B Data Book page 227

3. Piping Design
3-1-3. PUHY-RP600-650YSJM-B
OU
OU
h2
T
S
1st Joint
Outdoor Twinning Kit
CMY-RP100VBK
Fig. 3-1-1C Piping scheme
Table 3-1-3-1. Piping length
Item
Total piping length
Distance between OU and OU
Height between OU and OU
Farthest IU from OU (L1)
Farthest IU from the first Joint (L2)
Height between OU and IU (OU above IU) H
Height between OU and IU (OU under IU) H'
Height between IU and IU
OU: Outdoor Unit, IU: Indoor Unit
* 1 Do not exceed the amount of refrigerant to be charged written below.
PUHY-RP600-650YSJM-B: 0.39 × L
L : Total length of ø22.2 liquid pipe (m)
0
L : Total length of ø19.05 liquid pipe (m)
1
L : Total length of ø15.88 liquid pipe (m)
2
L : Total length of ø12.7 liquid pipe (m)
3
L : Total length of ø9.52 liquid pipe (m)
4
L : Total length of ø6.35 liquid pipe (m)
5
* 2 When creating 1 system out of the pipework of 2 systems, (L1-L2) must be 40 m or less.
L1: Distance between system 1's original outdoor unit and system 1's original farthest indoor unit.
L2: Distance between system 2's original outdoor unit and system 2's original farthest indoor unit.
L1 L2
Table 3-1-3-3. Piping "A" size selection rule
Outdoor
PUHY-RP600YSJM-B
PUHY-RP650YSJM-B
Table 3-1-3-5. Piping "a", "b", "c", "d", "e", "f", "g" size selection rule
Indoor Unit size
P20, P25, P32, P40
P50, P63, P71, P80
P140
P200
P250
Note 1. No Joint after Header; Piping direct to Indoor Unit from Header
Note 2. As bents cause pressure loss on transportation of refrigerant, fewer bents design is better.
Piping length needs to consider the actual length and equivalent length which bents are counted.
Equivalent piping length (m) = Actual piping length + "M" x Quantity of bent.
OK
To indoor unit
Downward
incline
Install the pipes from the outdoor unit to the branch
joint with a downward incline.
A
C
D
d
Joint
IU
Piping in the figure
S+T+A+B+C+D+E+a+b+c+d+e+f+g
S+T
h2
S(T)+A+C+D+E+g / S(T)+A+B+c
C+D+E+g / B+c
h1
+ 0.29 × L + 0.2 × L + 0.12 × L + 0.06 × L
0 1 2 3
(mm)
Pipe (Liquid) Pipe (Gas)
ø19.05 ø34.93
ø19.05 ø41.28
(mm [in.])
Pipe (Liquid) Pipe (Gas)
ø6.35 [1/4"] ø12.70 [1/2"]
ø9.52 [3/8"] ø15.88 [5/8"]
ø9.52 [3/8"] ø19.05 [3/4"]
ø12.7 [1/2"] ø25.4 [1"]
ø12.7 [1/2"] ø28.58 [1-1/8"]
SYSTEM DESIGN
NG
To indoor unit
Upward
incline
Header
B
a b
IU IU
L1
L2
E
e f
IU IU
(m) Table 3-1-3-2. Bent equivalent length "M"
Max. length Max. equivalent length
250 *1
10
0.1
120 150
40
*2
50
40
15
+ 0.024 × L < 25
4 5
Table 3-1-3-4. Piping "B", "C", "D", "E" size selection rule
Total down-stream Indoor capacity
~ P80
P81 ~ P160
P161 ~ P330
P331 ~ P630
P631 ~
Note 3. Indoor capacity is described as its model size.
For example, PEFY-P32VMM-E, its capacity is P32.
Note 4. Total down-stream Indoor capacity is the summary of the model size of Indoors downstream.
For example, PEFY-P25VMM-E + PEFY-P32VMM-E: Total Indoor capacity = P25 + P32 = P57
Note 5. Piping size determined by the Total down-stream indoor capacity is NOT necessary
to be bigger than the up-stream one.
i.e. A >= B; A >= C >= D
Trap (gas
pipe only)
To indoor unit To indoor unit
2m 2 m max
If the length of pipe between the branch joint and outdoor
unit exceeds 2 m, provide at rap at a distance 2 m or less
from the branch joint.
Capped
c
IU
g
IU
IU : Indoor unit, OU : Outdoor unit
Outdoor unit model M (m/bent)
PUHY-RP600YSJM-B
PUHY-RP650YSJM-B
Pipe (Liquid)
ø9.52 [3/8"]
ø12.7 [1/2"]
ø12.7 [1/2"]
ø15.88 [5/8"]
ø19.05 [3/4"]
0.50
0.50
(mm [in.])
Pipe (Gas)
ø15.88 [5/8"]
ø19.05 [3/4"]
ø25.4 [1"]
ø34.93 [1-3/8"]
ø41.28 [1-5/8"]
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