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Y SERIES PIPING LIMITATIONS (continued)
3. Piping Design
3-2-3. PUHY-P950-1350YSKB-A Piping
OU
OU
h2
M
N
1st Outdoor
Twinning Kit
2nd Outdoor
Twinning Kit
Fig. 3-2-1C Piping scheme
Piping length
e t I
m
Total piping length
D
t s i
n a
e c
e b
w t
e
n e
O
U
a
H
e
g i
t h
e b
w t
e
n e
O
U
a
d n
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 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.
Piping "A" size selection rule
Outdoor unit
PUHY-P950-1350YSKB CMY-Y300VBK3
For Piping size"M","N","S","T", please refer to specification of the Twinning kit
CMY-Y300VBK3 at the Outdoor unit's external drawing.
Piping"B","C","D","E" size selection rule
Total down-stream Indoor capacity
~
1 P
0 4
1 P
1 4
~
2 P
0 0
2 P
1 0
~
3 P
0 0
3 P
1 0
~
4 P
0 0
4 P
1 0
~
6 P
0 5
6 P
1 5
~
8 P
0 0
8 P
1 0
~
Piping"a","b","c","d","e","f","g" size selection rule
n I
o d
r o
U
t i n
i s
e z
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
20
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;
OU
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.
OK
Downward
incline
T
Install the pipes from the outdoor unit to the branch
S
joint with a downward incline.
A
1st Joint
C
d
Joint
IU
P
p i
n i
i g
t n
e h
i f
u g
e r
S+T+M+N+A+B+C+D+E+a+b+c+d+e+f+g 1000[3280']
d n
O
U
M
+
N
+
S
T +
O
U
2 h
M(N)+S+A+C+D+E+g / M(N)+S+A+B+c 165[541']
C+D+E+g / B+c
h1
Twinning kit
Pipe(Liquid)
ø19.05[3/4"] ø41.28[1-5/8"]
Pipe(Liquid)
ø
. 9
2 5
/ 3 [
] " 8
ø
. 9
2 5
/ 3 [
] " 8
ø
. 9
2 5
/ 3 [
] " 8
1 ø
. 2
0 7
/ 1 [
] " 2
1 ø
. 5
8 8
/ 5 [
] " 8
1 ø
. 9
5 0
/ 3 [
] " 4
1 ø
. 9
5 0
/ 3 [
] " 4
i P
e p
i L (
u q
) d i
ø6.35 [1/4"]
ø
. 9
2 5
/ 3 [
] " 8
ø
. 9
2 5
/ 3 [
] " 8
NG
To indoor unit
T
i o
d n
o o
u r
t i n
Upward
incline
B
a
IU
L1
L2
D
E
e
f
IU
IU
(m [ft.])
M
a
. x
e l
g n
h t
Max. equivalent length
-
0 1
3 [
] ' 2
-
0
1 .
. 0 [
] ' 3
-
190[623']
40[131']
40[131']
*3
50[164']
-
*1
40[131']
-
*2
15[49']
*4
-
(mm [in.])
Selection criteria for joints
Pipe(Gas)
Total down-stream Indoor capacity
~ P200
P201 ~ P400
P401 ~ P650
P651 ~
*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).
*Concerning detailed usage of Joint parts, refer to its Installation Manual.
See the table below for the first joint of
the outdoor unit described below.
(mm [in.])
Outdoor unit model
Pipe(Gas)
P950 to P1350
1 ø
. 5
8 8
/ 5 [
] " 8
1 ø
. 9
5 0
/ 3 [
] " 4
Header selection rule
2 ø
. 2
0 2
/ 7 [
] " 8
2 ø
. 8
8 5
1 [
/ 1 -
] " 8
Total down-stream Indoor capacity <=P200
2 ø
. 8
8 5
1 [
/ 1 -
] " 8
3 ø
. 4
3 9
1 [
/ 3 -
] " 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 above;
4 ø
. 1
8 2
1 [
/ 5 -
] " 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;
* Concerning detailed usage of Header parts, refer to its Installation Manual.
(mm [in.])
i P
e p
G (
a
) s
Note3.
Indoor capacity is described as its model size;
For example, PEFY-P32VMA-E, its capacity is P32;
ø12.70 [1/2"]
Note4.
Total down-stream Indoor capacity is the summary of the model size of Indoors downstream.
ø15.88 [5/8"]
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
1 ø
. 9
5 0
/ 3 [
] " 4
to be bigger than the up-stream one.
2 ø
. 2
0 2
/ 7 [
] " 8
i.e. A>=B; A>=C>=D
Trap (gas
pipe only)
To indoor unit
2m
2
m
m
x a
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.
Header
Capped
b
c
IU
IU
g
IU
IU : Indoor unit , OU : Outdoor unit
Bent equivalent length "M"
Outdoor unit model
PUHY-P950YSKB-A
PUHY-P1000YSKB-A
PUHY-P1050YSKB-A
PUHY-P1100YSKB-A
PUHY-P1150YSKB-A
PUHY-P1200YSKB-A
PUHY-P1250YSKB-A
PUHY-P1300YSKB-A
PUHY-P1350YSKB-A
Joint model
CMY-Y302S-G2
4-branch Header 8-branch Header 10-branch Header
CMY-Y104-G
CMY-Y108-G
<=P400
AN1 2nd
To indoor unit
M (m/bent [ft./bent])
0.80 [2.62]
0.80 [2.62]
0.80 [2.62]
0.80 [2.62]
0.80 [2.62]
0.80 [2.62]
0.80 [2.62]
0.80 [2.62]
0.80 [2.62]
Joint
CMY-Y102SS-G2
CMY-Y102LS-G2
CMY-Y202S-G2
CMY-Y302S-G2
CMY-Y1010-G
<=P650
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