3. Piping Design
YKB/YLM 2nd
4 - 98
S.D. R2
MEE15K022
H
H'
h1
A
OU
h2
h
g
f
e
d
c
IU
IU
IU
IU
IU
IU
BC controller
Max. 3 sets for 1 port.
Total capacity < = P80
(P15-P80)
(P100-P250)
CMY-R160-J1 (joint)
Possible to remove P140 and under P140, but the
capacity should be multiplied by a correction factor 0.97
Max. 3 sets for 1 port.
Total capacity > P80
IU (each) max < = P80
Refer to the
installation manual
for the connection
B
C
D
IU
E
a
b
CMY-R160-J1 (joint)
Possible to remove the total capacity P140 and under P140,
but the capacity should be multiplied by a correction factor 0.97
IU
3-2-2. IF 16 ports or less are in use, I.e., if only one BC controller is in use with no sub BC controller
Table3-2-2-2. Bent equivalent length "M"
Outdoor Model
M (m/bent [ft./bent])
EP200YLM-A1
0.35 [1.15']
EP250YLM-A1
0.42 [1.38']
EP300YLM-A1
EP350YLM-A1
0.42 [1.38']
EP400YLM-A1
0.47 [1.54']
EP450YLM-A1
0.50 [1.64']
0.50 [1.64']
Fig. 3-2-2-1 Piping length and height between IU and BC controller
T
able3-2-2-3. Piping "A"size selection rule
(mm [in.])
Outdoor Model
Pipe(High pressure)
Pipe(Low pressure)
EP200YLM-A1
ø15.88 [5/8"]
ø19.05 [3/4"]
EP250YLM-A1
ø19.05 [3/4"]
ø22.20 [7/8"]
EP300YLM-A1
EP350YLM-A1
ø19.05 [3/4"]
ø22.20 [7/8"]
EP400YLM-A1
ø19.05 [3/4"]
ø28.58 [1-1/8"]
EP450YLM-A1
ø22.20 [7/8"]
ø28.58 [1-1/8"]
ø22.20 [7/8"]
ø28.58 [1-1/8"]
Table3-2-2-5.
Piping "a", "b", "c", "d", "e", "f", "g", "h" size selection rule
(mm [in.])
Indoor Unit size
Pipe(Liquid)
Pipe(Gas)
P15 to P50, GUF-50RD(H)
ø6.35 [1/4"]
ø12.70 [1/2"]
P63 to 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"]
EP500YLM-A1
0.50 [1.64']
EP500YLM-A1
ø22.20 [7/8"]
ø28.58 [1-1/8"]
Note1. No Header usable on PURY system.
Note2. Indoor unit sized P100-P250 should be connected to BC controller via Y shape joint CMY-R160-J1 ;
Note3. Indoor unit sized P100-P250 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 length+"M" x Number of bent.
Note5. Set DIP-SW 4-6 to ON of BC controller, in case of connected Indoor unit sized P100-P250 with 2 ports.
Note6. It is also possible to connect Indoor unit sized P100-P140 with 1 port (set DIP-SW 4-6 to OFF).
Note7. Individual indoor units grouped together to connect to the BC controller via one port cannot operate
individually in heating and cooling modes at the same time. I.e., they must all function in either heating
However, the cooling capacity decreases a little (For details, refer to the chapter OUTDOOR UNITS,
R2 (High COP) SERIES, 8-5. Correction by port counts of the BC controller).
or cooling together.
Note8. Indoor capactiy is described as its model size. For example, PEFY-P63VML-E, its capacity is P63.
Note9. Total down-stream Indoor capacity is the summary of the model size of Indoors down-stream.
For example, PEFY-P63VML-E + PEFY-P32VML-E : Total Indoor capacity = P63 + P32 = P95.
OU : Outdoor Unit ; IU : Indoor Unit ; BC : BC controller
*1. Refer to the section 3-2-7.
PURY-EP-YLM-A1
*2. Details refer to Fig.3-2-2-1
*3. Farthest Indoor from BC controller "D+E+h" can exceed 40m till 60m if no Indoor sized P200, P250 connected. Details refer to Fig.3-2-2-1
*4. Distance of Indoor sized P200, P250 from BC must be less than 10m, if any.
*5. 90m is available depending on the model and installation conditions. For more detailed information, contact your local distributor.
*6. 60m is available depending on the model and installation conditions. For more detailed information, contact your local distributor.
0
10
20
30
40
50
60
70
0
5
10
15
Height difference between the main BC controller
and indoor unit (m)
Pipe length between the main BC
controller and indoor unit (m)
S
T
M
N
CMY-R160-J1
(Gas side)
IU
CMY-R160-J1
(Liquid side)
BC controller
Fig. 3-2-2AA
Fig. 3-2-2A Piping scheme
Note10. T
o enable the continuous heating mode, set SW4 (848) to ON.
Table3-2-2-4. Piping "B", "C", "D", "E" size seleciton rule
(mm [in.])
P141-P200
ø9.52 [3/8"]
ø19.05 [3/4"]
P201-P250
ø9.52 [3/8"]
ø22.20 [7/8"]
Total down-stream Indoor capacity
Pipe(Liquid)
Pipe(Gas)
P140 or less
ø9.52 [3/8"]
ø15.88 [5/8"]
Table 3-2-2-1. Piping length limitation
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+h
*1
-
Farthest IU from OU
A+D+E+h
165 [541']
190 [623']
Distance between OU and BC
A
110 [360'] *1
110 [360'] *1
Farthest IU from BC controller
D+E+h
40 [131'] *2*3
40 [131'] *3
Heignt between OU and IU (OU above IU)
H
50 [164'] *5
-
Heignt between OU and IU (OU under IU)
H'
40 [131'] *6
-
Height between IU and BC
h1
15 [49'] (10 [32']) *4
-
Height between IU and IU
h2
15 [49'] (10 [32']) *4
-
(m [ft.])
(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
