4 - 42
S.D. Y
MEE15K022
3. Piping Design
YKB/YLM 2nd
Header selection rule
4-branch Header
8-branch Header
10-branch Header
CMY-Y104-G
CMY-Y108-G
CMY-Y1010-G
Total down-stream Indoor capacity
<=P200
<=P400
<=P650
* CMY-Y104-G can directly connect PUHY-EP200YLM-A1, but can NOT directly connect PUHY-EP250YLM-A1 or above;
* CMY-Y108-G can directly connect PUHY-EP200-450YLM-A1, but can NOT directly connect PUHY-EP500YLM-A1 or above;
* CMY-Y1010-G can directly connect PUHY-EP200-600Y(S)LM-A1;
* CMY-Y104-G can NOT connect P200,P250 Indoor, but CMY-Y108, Y1010-G can do;
* Concerning detailed usage of Header parts, refer to its Installation Manual.
Selection criteria for joints
Total down-stream Indoor capacity
Joint
~
P200
CMY-Y102SS-G2
P201
~
P400
CMY-Y102LS-G2
P401
~
P650
CMY-Y202S-G2
P651
~
CMY-Y302S-G2
*Concerning detailed usage of Joint parts, refer to its Installation Manual.
*The total capacity of the units in the downstream of the branch joint on at least one of the piping lines that
are connected to the branch joint should be 650 or below.
If the total capacity of the units in the downstream of the branch joints on both lines is 650 or above use
two branch joints (CMY-Y302S-G2).
Outdoor Twinning Kit
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.
H (OU above IU)
h1
H' (OU under IU)
h2
1st Joint
Joint
b
a
L2
L1
IU
IU
IU
IU
g
IU
e
IU
d
C
D
IU
f
E
T
S
A
B
Header
Capped
IU : Indoor unit , OU : Outdoor unit
Fig. 3-2-5A Piping scheme
c
2m
To indoor unit
To indoor unit
To indoor unit
To indoor unit
2 m max
Trap (gas
pipe only)
Upward
incline
Downward
incline
Install the pipes from the outdoor unit to the branch
joint with a downward incline.
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.
OK
NG
3-2-5. PUHY-EP550-600YSLM-A1 Piping
Piping length (m [ft.])
Item
Piping in the figure
Max. length
Max. equivalent length
Total piping length
S+T+A+B+C+D+E+a+b+c+d+e+f+g
1000 [3280']
-
Distance between OU and OU
S+T
10[32']
-
Height between OU and OU
h2
0.1[0.3']
-
Farthest IU from OU (L1)
S(T)+A+C+D+E+g / S(T)+A+B+c
165 [541']
190 [623']
Farthest IU from the first Joint (L2)
C+D+E+g / B+c
40 [131']
40 [131']
Height between OU and IU (OU above IU) H
50
[164']
-
Height between OU and IU (OU under IU) H'
40
[131']
-
Height between IU and IU
h1
15 [49']
-
OU: Outdoor Unit, IU: Indoor Unit
Piping"B","C","D","E" size selection rule
(mm [in.])
Total down-stream Indoor capacity
Pipe(Liquid)
Pipe(Gas)
~ P140
ø9.52 [3/8"]
ø15.88 [5/8"]
P141
~ P200
ø9.52 [3/8"]
ø19.05 [3/4"]
P201
~ P300
ø9.52 [3/8"]
ø22.20 [7/8"]
P301
~ P400
ø12.70 [1/2"]
ø28.58 [1-1/8"]
P401
~ P650
ø15.88 [5/8"]
ø28.58 [1-1/8"]
P651
~ P800
ø19.05 [3/4"]
ø34.93 [1-3/8"]
P801
~
ø19.05 [3/4"]
ø41.28 [1-5/8"]
Piping"a","b","c","d","e","f","g" size selection rule
(mm [in.])
Indoor Unit size
Pipe(Liquid)
Pipe(Gas)
P20,P25,P32,P40,P50,GUF-50RD(H)
ø6.35 [1/4"]
ø12.70 [1/2"]
P63,P71,P80,P100,P125,P140,GUF-100RD(H)
ø9.52 [3/8"]
ø15.88 [5/8"]
P200
ø9.52 [3/8"]
ø19.05 [3/4"]
P250
ø9.52 [3/8"]
ø22.20 [7/8"]
Bent equivalent length "M"
Outdoor unit model
M (m/bent [ft./bent])
PUHY-EP550YSLM-A1
0.50
[1.64]
PUHY-EP600YSLM-A1
0.50
[1.64]
For Piping size "S","T", please refer to specification of the Twinning kit CMY-Y100VBK3 at the Outdoor
unit's external drawing.
Outdoor unit
PUHY-EP550-600YSLM-A1
CMY-Y100VBK3
ø15.88[5/8"]
ø28.58[1-1/8"]
Twinning kit
Pipe(Liquid)
Pipe(Gas)
(mm [in.])
Piping "A" size selection rule
Outdoor unit model
Joint model
EP550, EP600
CMY
-Y202S-G2
See the table below for the first joint of
the outdoor unit described below.
*1
*2
*3
*4
OU
OU
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.
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
to be bigger than the up-stream one.
i.e. A>=B; A>=C>=D
*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, and g by one size.
