Mitsubishi Electric BDT CITY MULTI Installation And Pre-Commissioning Booklet page 18

3. Piping Design
Y SERIES PIPING LIMITATIONS
3-2. Piping Design
3-2-1. PUHY-P200-350YKB-A Piping
OU
A
Fig. 3-2-1A Piping scheme
Piping length
e t I m
Total piping length
Farthest IU from OU (L1)
Farthest IU from first Joint (L2)
Height between OU and IU (OU above IU)
Height between OU and IU (OU under IU) H'
Height between IU and IU
OU: Outdoor Unit, IU: Indoor Unit
*1 90m is available depending on the model and installation conditions. For more detailed information, contact your local distributor.
*2 60m is available depending on the model and installation conditions. For more detailed information, contact your local distributor.
*3 90m is available. When the piping length exceeds 40m, use one size larger liquid pipe starting with the section of piping where 40m is exceeded and all piping after that point.
In the figure above, if the piping labeled "E" exceeds 40 meters (but does not exceed 90 meters), increase the size of the liquid piping labeled E, f, and g by one size.
*4 30m is available. If the height difference between indoor units exceeds 15 meters (but does not exceed 30 meters), use one-size larger pipes for indoor unit liquid pipes.
In the figure above, if "h1" exceeds 15 meters, increase the size of the liquid piping labeled C, D, E, d, e, f, and g by one size.
Piping "A" size selection rule
Outdoor unit
PUHY-P200YKB
PUHY-P250YKB
PUHY-P300YKB
PUHY-P350YKB
*1. L1>=90m [295ft.], ø12.70mm [1/2in.] ; L1<90m [295ft.], ø9.52mm [3/8in.]
*2. L1>=40m [131ft.], ø12.70mm [1/2in.] ; L1<40m [131ft.], ø9.52mm [3/8in.]
Piping"B","C","D","E"size selection rule
Total down-stream Indoor capacity
~ P140
P141 ~ P200
P201 ~ P300
P301 ~ P400
P401 ~ P650
P651 ~ P800
P801 ~
Piping "a","b","c","d","e","f","g" size selection rule
Indoor Unit size
P20,P25,P32,P40,P50,GUF-50RD(H)
P63,P71,P80,P100,P125,P140,GUF-100RD(H) ø9.52 [3/8"]
2 P 0 0
2 P 0 5
18
1st Joint
C
D
Joint
d
IU
P p i n i i g t n e h i f u g e r
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
H
h1
i P e p i L ( u q ) d i
ø9.52 [3/8"]
ø9.52 [3/8"] *1
ø9.52 [3/8"] *2
ø12.70 [1/2"]
Pipe(Liquid)
ø9.52 [3/8"]
ø9.52 [3/8"]
ø9.52 [3/8"]
ø12.70 [1/2"]
ø15.88 [5/8"]
ø19.05 [3/4"]
ø19.05 [3/4"]
Pipe(Liquid)
ø6.35 [1/4"]
ø . 9 2 5 / 3 [ ] " 8
ø . 9 2 5 / 3 [ ] " 8
Note1. No Joint after Header; Piping direct to Indoor Unit from Header;
Note2. As bends cause pressure loss on transportation of refrigerant, fewer bends design is better;
Piping length needs to consider the actual length and equivalent length which bends are counted.
Equivalent piping length (m)=Actual piping length+"M" x Quantity of bends.
B
L1
L2
E
g
e f
IU IU IU
(m [ft.])
M a . x e l g n h t Max. equivalent length
165 [541'] 190 [623']
*3
40 [131'] 40 [131']
*1
0 5 [164']
*2
40 [131']
*4
15 [49']
(mm [in.]) Selection criteria for joints
Pipe(Gas) Total down-stream Indoor capacity
ø22.20 [7/8"] ~ P200
ø22.20 [7/8"] P201 ~ P400
ø22.20 [7/8"] P401 ~ P650
ø28.58 [1-1/8"] P651 ~
*Concerning detailed usage of Joint parts, refer to its Installation Manual.
(mm [in.]) Header selection rule
Pipe(Gas)
ø15.88 [5/8"]
ø19.05 [3/4"] Total down-stream Indoor capacity <=P200
ø22.20 [7/8"]
* CMY-Y104-G can directly connect PUHY-P200YKB, but can NOT directly connect PUHY-P250YKB or above;
* CMY-Y108-G can directly connect PUHY-P200-450Y(S)KB, but can NOT directly connect PUHY-P500YSKB or
ø28.58 [1-1/8"]
above;
ø28.58 [1-1/8"]
* CMY-Y1010-G can directly connect PUHY-P200-600Y(S)KB;
* CMY-Y104-G can NOT connect P200,P250 Indoor, but CMY-Y108, Y1010-G can do;
ø34.93 [1-3/8"]
* Concerning detailed usage of Header parts, refer to its Installation Manual.
ø41.28 [1-5/8"]
Note3. Indoor capacity is described as its model size;
For example, PEFY-P32VMA-E, its capacity is P32;
Note4. Total down-stream Indoor capacity is the summary of the model size of Indoors downstream.
(mm [in.])
For example, PEFY-P25VMA-E+PEFY-P32VMA-E: Total Indoor capacity=P25+P32=P57
Note5. Piping sized determined by the Total down-stream indoor capacity is NOT necessary
Pipe(Gas)
to be bigger than the up-stream one.
ø12.70 [1/2"]
i.e. A>=B; A>=C>=D
ø15.88 [5/8"]
1 ø . 9 5 0 / 3 [ ] " 4
2 ø . 2 0 2 / 7 [ ] " 8
Header
Capped
a b c
IU IU IU
IU : Indoor unit , OU : Outdoor unit
Bent equivalent length "M"
Outdoor unit model
- PUHY-P200YKB-A
PUHY-P250YKB-A
PUHY-P300YKB-A
- PUHY-P350YKB-A
-
-
4-branch Header 8-branch Header 10-branch Header
CMY-Y104-G CMY-Y108-G
<=P400
AN1 2nd
M (m/bent [ft./bent])
0.42 [1.38]
0.42 [1.38]
0.47 [1.54]
0.47 [1.54]
Joint
CMY-Y102SS-G2
CMY-Y102LS-G2
CMY-Y202S-G2
CMY-Y302S-G2
CMY-Y1010-G
<=P650