Mitsubishi Electric CITY MULTI PUHY-HP72-240TNU-A Data Book page 100

12. PIPING DESIGN
12-2-1. PUHY-HP72-120TNU/YNU 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 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 90 m [295 ft.] is available depending on the model and installation conditions. For more detailed information, contact your local distributor.
*2 60 m [197 ft.] is available depending on the model and installation conditions. For more detailed information, contact your local distributor.
*3 90 m [295 ft.] is available. When the piping length exceeds 40 m [131 ft.], use one size larger liquid pipe starting with the section of piping where 40 m [131 ft.] is exceeded and all piping after that point.
In the figure above, if the piping labeled "E" exceeds 40 m [131 ft.] (but does not exceed 90 m [295 ft.]), increase the size of the liquid piping labeled E, f, and g by one size.
*4 30 m [98 ft.] is available. If the height difference between indoor units exceeds 15 m [49 ft.] (but does not exceed 30 m [98 ft.]), use one-size larger pipes for indoor unit liquid pipes.
In the figure above, if "h1" exceeds 15 m [49 ft.], increase the size of the liquid piping labeled d, e, f, and g by one size.
Table1. Piping "A" size selection rule
Outdoor unit
PUHY-HP72T/YNU
PUHY-HP96T/YNU
PUHY-HP120T/YNU
*1. L1>=90 m [295 ft.], ø12.70 mm [1/2 in.] ; L1<90m [295ft.], ø9.52mm [3/8in.]
*2. L1>=40 m [131 ft.], ø12.70 mm [1/2 in.] ; L1<40m [131ft.], ø9.52mm [3/8in.]
Table2. Piping"B","C","D","E"size selection rule
Total down-stream Indoor capacity
~ P54
P55 ~ P72
P73 ~ P108
P109 ~ P144
P145 ~ P240
P241 ~ P308
P309 ~
Table3. Piping "a","b","c","d","e","f","g" size selection rule
Indoor Unit size
P04 ~ P18
P24 ~ P54
P72
P96
MEES21K108
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;
B
L1
C
L2
D E
Joint
d e
IU IU
Piping in the figure
A+B+C+D+E+a+b+c+d+e+f+g 1000 [3280]
A+C+D+E+g / A+B+c
C+D+E+g / B+c
h1
(mm [in.])
Pipe(Liquid) Pipe(Gas)
ø9.52 [3/8] ø22.2 [7/8]
ø9.52 [3/8] *1 ø22.2 [7/8]
ø9.52 [3/8] *2 ø28.58 [1-1/8]
(mm [in.])
Pipe(Liquid) Pipe(Gas)
ø9.52 [3/8] ø15.88 [5/8]
ø9.52 [3/8] ø19.05 [3/4]
ø9.52 [3/8] ø22.20 [7/8]
ø12.70 [1/2] ø28.58 [1-1/8]
ø15.88 [5/8] ø28.58 [1-1/8]
ø19.05 [3/4] ø34.93 [1-3/8]
ø19.05 [3/4] ø41.28 [1-5/8]
(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]
ø9.52 [3/8] ø22.20 [7/8]
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.
g
f
IU IU
(m [ft.]) Bent equivalent length "M"
Max. length Max. equivalent length Outdoor Model
- PUHY-HP72T/YNU
165 [541] 190 [623] PUHY-HP96T/YNU
40 [131] *3 40 [131] PUHY-HP120T/YNU
50 [164] *1 -
40 [131] *2 -
15 [49] *4 -
Table4-1. Selection criteria for joints
Total down-stream Indoor capacity
~ P72
P73 ~ P144
P145 ~ P240
P241 ~
*Concerning detailed usage of joint parts, refer to its Installation Manual.
Table4-2.
See the table below for the first joint of
the outdoor unit described below.
Outdoor unit model Joint model
HP72 to HP120 CMY-Y102LS-G2
Table5. Header selection rule
4-branch Header 8-branch Header 10-branch Header
CMY-Y104C-G
Total down-stream Indoor capacity <=P72
* CMY-Y104C-G can directly connect PUHY-HP72T/YNU, but can NOT directly connect PUHY-HP96T/YNU or above;
* CMY-Y108C-G can directly connect PUHY-HP72~144T/Y(S)NU, but can NOT directly connect PUHY-HP192T/YSNU or above;
* CMY-Y1010C-G can directly connect PUHY-HP72~240T/Y(S)NU;
* CMY-Y104C-G can NOT connect P72~P96 Indoor, but CMY-Y108,Y1010C-G can do;
* Concerning detailed usage of Header parts, refer to its Installation Manual.
Note3. Indoor capacity is described as its model size;
For example, PEFY-P06NMAU-E3, its capacity is P06;
Note4. Total down-stream Indoor capacity is the summary of the model size of Indoors downstream.
For example, PEFY-P06NMAU-E3+PEFY-P08NMAU-E3: Total Indoor capacity=P06+P08=P14
Note5. 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
Hyper Heating Inverter Y-Series
Header
Capped
a b
c
IU IU IU
IU : Indoor unit , OU : Outdoor unit
M (m/bent [ft./bent])
0.35 [1.15]
0.42 [1.38]
0.42 [1.38]
Joint
CMY-Y102SS-G2
CMY-Y102LS-G2
CMY-Y202S-G2
CMY-Y302S-G2
CMY-Y108C-G CMY-Y1010C-G
<=P144 <=P240
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