MEES19K187
PQH
Y
-P
-T
(S)L
MU-A1
, Y(S)L
M
U-A1
, Z(S)
LMU-
A1
331
1. Piping Design
1-2-3. PQHY-P72-192ZLMU Piping
Table4-1. Selection criteria for joints
Table4-2.
Total down-stream Indoor capacity
Joint
~
P72
CMY-Y102SS-G2
P73
~ P144
CMY-Y102LS-G2
P145 ~ P240
CMY-Y202S-G2
P241 ~
CMY-Y302S-G2
*Concerning detailed usage of joint parts, refer to its Installation Manual.
Table5. Header selection rule
4-branch Header 8-branch Header 10-branch Header
CMY-Y104C-G
CMY-Y108C-G
CMY-Y1010C-G
T
otal down-stream Indoor capacity <=P72
<=P144
<=P240
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 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
* CMY-Y104C-G can directly connect PQHY-P72ZLMU, but can NOT directly connect PQHY-P96ZLMU or above;
* CMY-Y108C-G can directly connect PQHY-P72~144Z(S)LMU, but can NOT directly connect PQHY-P168Z(S)LMU or above;
* CMY-Y1010C-G can directly connect PQHY-P72~240Z(S)LMU;
* 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.
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 "M" x Quantity of bent.
IU: Indoor unit, HU: Heat source unit
Fig. 1-2-3A Piping scheme
L1
L2
C
b
h1
c
d
g
e
A
B
D
a
HU
Joint
H (HU above IU)
H' (HU under IU)
IU
IU
f
E
IU
IU
IU
IU
IU
Header
1st joint
Capped
Piping length
(m [ft.])
Item
Piping in the figure
Max. length
Max. equivalent length
Total piping length
A+B+C+D+E+a+b+c+d+e+f+g
*1
-
Farthest IU from HU (L1)
A+C+D+E+g / A+B+c
165 [541]
190 [623]
Farthest IU from first joint (L2)
C+D+E+g / B+c
40 [131]
Height between HU and IU (HU above IU) H 50
[164]
-
Height between HU and IU (HU under IU) H'
40
[131]
-
Height between IU and IU h1
15
[49]
-
*1 L1>=90 m [295 ft.], ø12.70 mm [1/2 in.]
*2 L1>=40 m [131 ft.], ø12.70 mm [1/2 in.]
Table1. Piping "A" size selection rule
(mm [in.])
Heat source unit
Pipe(Liquid)
Pipe(Gas)
PQHY-P144ZLMU
ø12.70 [1/2]
ø28.58 [1-1/8]
PQHY-P120ZLMU
ø9.52 [3/8] *2
ø22.20 [7/8]
PQHY-P96ZLMU
ø9.52 [3/8] *1
ø22.20 [7/8]
PQHY-P72ZLMU
ø9.52 [3/8]
ø19.05 [3/4]
PQHY-P168-192ZLMU
ø15.88 [5/8]
ø28.58 [1-1/8]
Table2. Piping"B","C","D","E"size selection rule
(mm [in.])
Total down-stream Indoor capacity
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]
~ P54
P55 ~ P72
P73 ~ P108
P109 ~ P144
P145 ~ P240
P241 ~ P308
P309 ~
ø19.05 [3/4] ø41.28
[1-5/8]
Table3. Piping "a","b","c","d","e","f","g" size selection rule
(mm [in.])
Indoor Unit size
Pipe(Liquid)
Pipe(Gas)
P04,P05,P06,P08,P12,P15,P18
ø6.35 [1/4]
ø12.70 [1/2]
P24,P27,P30,P36,P48,P54
ø9.52 [3/8]
ø15.88 [5/8]
P72
ø9.52 [3/8]
ø19.05 [3/4]
P96
ø9.52 [3/8]
ø22.20 [7/8]
Bent equivalent length "M"
Heat source Model
M (m/bends [ft./bends])
PQHY-P144ZLMU 0.50
[1.64]
PQHY-P168ZLMU 0.50
[1.64]
PQHY-P192ZLMU
0.50 [1.64]
PQHY-P72ZLMU
0.35
[1.15]
PQHY-P120ZLMU 0.42
[1.38]
PQHY-P96ZLMU 0.42
[1.38]
heat source unit model
Joint model
P144 to P192
CMY-Y202S-G2
P96 to P120
CMY-Y102LS-G2
See the table below for the first joint of
the heat source unit described below.
40 [131] *2
HU: Heat source Unit, IU: Indoor Unit
*1 300 [984] for PQHY-P72-120ZLMU, 500 [1640] for PQHY-P144-192ZLMU
*2 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.
0000005756.BOOK 331 ページ ２０２０年２月２８日 金曜日 午後１時２１分
