Mitsubishi Electric CITY MULTI PUHY-M200-300YNW-A1 Data Book page 67

12. PIPING DESIGN
12-2-1. PUHY-(E)M200-300YNW-A1 Piping
OU
A
1st Joint
Fig. 12-2-1A Piping scheme
Piping length
Item
Total piping length
Farthest IU from OU (L1)
Farthest IU from 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 30 m is available. If the height difference between indoor units exceeds 15 m (but does not exceed 30 m), use one-size larger pipes for indoor unit liquid pipes.
In the figure above, if "h1" exceeds 15 m, increase the size of the liquid piping labeled d, e, f, and g by one size.
*2 The maximum total height difference between the 1st joint and each indoor unit varies depending on the installation position of the 1st joint. Please refer to Fig. 1.
*3 The maximum total height difference between the 1st joint and each indoor unit varies depending on the installation position of the 1st joint. Please refer to Fig. 2.
Fig. 1 When the outdoor unit is above the indoor unit
160
140
120
100
80
60
40
20
0
0 10 20
Height difference between the outdoor unit and the 1st Joint [m]
Height difference between the outdoor unit
and the 1st Joint
Maximum total height differences between
the 1st Joint and each of the indoor units
(When the pipe length between the OU
and the 1st Joint is 110 m or longer: A)
Maximum total height differences between
the 1st Joint and each of the indoor units
(When the pipe length between the OU
and the 1st Joint is 60 m or shorter: B)
MEES19K116
Note1. No Joint after Header; Piping direct to Indoor Unit from Header;
Note2. 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.
B
L1
C
L2
D E
Joint
d e
IU IU
Piping in the figure Max. length
A+B+C+D+E+a+b+c+d+e+f+g 1000 [3280']
A+C+D+E+g / A+B+c 165 [541']
C+D+E+g / B+c 40 [131']
50 [164']
40 [131']
h1
A
B
30 40 50 60
m 50 40 30 20 10 0
m 0 10 20 30 40 50
m 0 30 60 90 120 150
a
IU
g
f
IU IU
(m [ft.]) Bent equivalent length "M"
Max. equivalent length Outdoor unit model
- PUHY-(E)M200YNW-A1
190 [623'] PUHY-(E)M250YNW-A1
40 [131'] PUHY-(E)M300YNW-A1
*2
-
*3
-
*1
15 [49'] -
Fig. 2 When the outdoor unit is below the indoor unit
400
350
300
250
200
150
100
50
0
0 10
Height difference between the outdoor unit and the 1st Joint [m]
Height difference between the outdoor unit
and the 1st Joint
Maximum total height differences between
the 1st Joint and each of the indoor units
(When the pipe length between the OU
and the 1st Joint is 110 m or longer: A)
Maximum total height differences between
the 1st Joint and each of the indoor units
(When the pipe length between the OU
and the 1st Joint is 60 m or shorter: B)
Y-Series
Header
Capped
b c
IU IU
IU : Indoor unit , OU : Outdoor unit
M (m/bent [ft./bent])
0.42 [1.38]
0.42 [1.38]
0.42 [1.38]
A
B
20 30 40
m 40 30 20 10
m 0 50 100 150
m 0 90 180 270
50
0
200
360
65