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117
12. PIPING DESIGN
WR2-Series-575V
12-2. Piping Design
12-2-1. IF 16 ports or less are in use, i.e., if only one BC controller is in use with no sub BC
controller.
"BC controller," "BC controller (Main)," and "BC controller (Sub)" that appear in this section refer to the J1-type, JA1/KA1 type, and KB1 type.
Piping length limitation *8
Bent equivalent length
Item
Piping in the figure
Max. length
Max. equivalent length
Total piping length (Total length of high pressure and liquid pipes)
A+B+C+D+E+a+b+c+d+e+f+g+i
*1
-
Farthest IU from HU
A+D+E+i
165 [541']
190 [623']
Distance between HU and BC
A
110 [360'] *1
110 [360'] *1
Farthest IU from BC controller
D+E+i
60 [197'] *2*3
60 [197'] *2*3
Height between HU and IU (HU above IU)
H
50 [164'] *6
-
Height between HU and IU (HU under IU)
H'
40 [131'] *7
-
Height between IU and BC
h1
15 [49'] (10 [32']) *4
-
Height between IU and IU
h2
30 [98'] (20 [65']) *5
-
(m [ft.])
Piping "B", "C", "D", "E" size seleciton rule
(mm [in.])
P55-P72
ø9.52 [3/8"]
ø19.05 [3/4"]
P73-P96
ø9.52 [3/8"]
ø22.20 [7/8"]
Piping "a", "b", "c", "d", "e", "f", "g", "i" size selection rule
(mm [in.])
Indoor Unit size
Pipe(Liquid)
Pipe(Gas)
P04-P18
ø6.35 [1/4"]
ø12.70 [1/2"]
P24-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"]
Total down-stream Indoor capacity
Pipe(Liquid)
Pipe(Gas)
P54 or less
ø9.52 [3/8"]
ø15.88 [5/8"]
Selection criteria for joints_A
P73-P96
CMY-Y102LS-G2
Total down-stream Indoor capacity
Joint
-P72
CMY-Y102SS-G2
Note1. No Header usable on PQRY system.
Note2. Indoor unit sized P72-P96 should be connected to BC controller via Y shape joint CMY-R160-J1.
Note3. Indoor unit sized P72-P96 does NOT share BC controller ports with other Indoor units ;
Note4. 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 Number of bent.
Note5. Set DIP-SW 4-6 to ON of BC controller, in case of connected Indoor unit sized P72-P96 with 2 ports.
Note6. Do not connect multiple indoor units to the same port when operating each of them in different mode (cooling,
heating, stop, and thermo-off). In case of connecting multiple indoor units to the same port, connecting all indoor
units to one remote controller and switching SW1-1 ON in the all connected indoor units (switch to thermostat
built in the remote controller) are recommended.
Note7. Indoor capactiy is described as its model size. For example, PEFY-P24NMAU-E3, its capacity is P24.
Note8. Total down-stream Indoor capacity is the summary of the model size of Indoors down-stream. For example,
PEFY-P24NMAU-E3 + PEFY-P06NMAU-E3: Total Indoor capacity = P24 + P06 = P30.
Note9. To connect the BC controller to the main pipe, use the reducer (CMY-R301S-G, CMY-R302S-G1, or CMY-R304S-G1).
Note10. Install the pipes correctly referring to the section titled "Procedures for installing the branched pipes."
HU: Heat source Unit; IU: Indoor Unit; BC: BC controller
*1. Refer to the section 12-2-4.
*2. Details refer to Fig. 1.
*3. When the P72 or P96 model of indoor units are connected to the system, the maximum distance from the BC controller to the farthest indoor unit
indicated as "D + E + i" in the figure is 40 meters.
*4. Distance of Indoor sized P72, P96 from BC must be less than 10 m, if any.
*5. Distance of Indoor sized P72, P96 from IU must be less than 20 m, if any.
*6. 90 m is available depending on the model and installation conditions. For more detailed information, contact your local distributor.
*7. 60 m is available depending on the model and installation conditions. For more detailed information, contact your local distributor.
*8. Total length of high-pressure pipes and liquid pipes
S
T
M
N
CMY-R160-J1
(
Gas
side)
IU
CMY-R160-J1
(
Liquid
side)
BC controller
Fig. 12-2-1AA
Fig. 12-2-1A Piping scheme
HU: Heat source unit, IU: Indoor unit
HU
Piping "A"size selection rule
(mm [in.])
Heat source Model
Pipe(High pressure)
Pipe(Low pressure)
*9. When the piping length is 65 m or longer, use the ø28.58
[1-1/8] pipe for the part that exceeds 65 m.
(T)ø19.05ID
(N)ø9.52ID
(M)ø3/8"(Brazing)
(M)ø3/8"(Brazing)
(S)ø5/8"(Brazing)
(S)ø5/8"(Brazing)
226
226
Joint CMY-R160-J1 Gas side
Joint CMY-R160-J1 Liquid side
Refer to the
installation manual
for the connection
CMY-R160-J1 (joint)
(joint_A)
CMY-Y102SS-G2
CMY-Y102LS-G2
CMY-R160-J1 (joint)
Pipe (Low pressure)
Pipe (High pressure)
When mixing GA1/HA1/GB1/HB1 type and JA1/KA1/KB1 type, specifications and restrictions is according to GA1/HA1/GB1/HB1type. (piping length, connectable number of Sub BC)
Pipe (Liquid)
Pipe (Gas)
(P04-P54)
(P04-P54)
(P72-P96)
Max. 3 sets for 1 port.
Total capacity < = P54
Max. 3 sets for 2 port.
P54 < Total capacity < = P96
IU (each) max < = P54
BC controller (Main BC)
IU
A
A
a
a
b
b
IU
IU
IU
B
B
c
c
IU
IU
IU
IU
d
d
e
e
f
f
g
g
i
i
C
C
H
D
D
E
E
h1
H'
h2
Heat source Model
M (m/bent [ft./bent])
Fig. 1 Piping length and height between IU and BC controller
Height difference between the main BC controller
and farthest indoor unit (m)
P
ipe length between the main BC
controller and indoor unit (m)
Height difference between the main BC controller
and farthest indoor unit (ft)
P
ipe length between the main BC
controller and indoor unit (ft)
0
10
20
30
40
50
60
70
0
5
10
15
0
50
100
150
200
250
0
5
10
15
20
25
30
35
40
45
P144ZLMU
0.50 [1.64']
P168ZLMU
0.50 [1.64']
P192ZLMU
0.50 [1.64']
P72ZLMU
0.35 [1.15']
P96ZLMU
0.42 [1.38']
P120ZLMU
0.47 [1.54']
P72ZLMU
ø15.88 [5/8"]
ø19.05 [3/4"]
P96-120ZLMU
ø19.05 [3/4"]
ø22.20 [7/8"]
P144-192ZLMU
ø22.20 [7/8"]
ø28.58 [1-1/8"]
0000006382.BOOK 117 ページ ２０２１年７月１９日 月曜日 午後４時１４分
