3. Piping Design
YKB/YLM 2nd
4 - 100
S.D. R2
MEE15K022
3-2-4.
IF more than 16 ports are in use, or if there is more than one BC controller in use for one outdoor unit
Table3-2-4-2. Bent equivalent length "M"
Outdoor Model
M (m/bent [ft./bent])
EP200YLM-A1
0.35 [1.15']
EP250YLM-A1
0.42 [1.38']
EP400YLM-A1
EP450YLM-A1
0.50 [1.64']
0.50 [1.64']
Fig. 3-2-4-1 Piping length and height between IU and BC controller
T
able3-2-4-3. 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"]
EP400YLM-A1
EP450YLM-A1
ø22.20 [7/8"]
ø28.58 [1-1/8"]
ø22.20 [7/8"]
ø28.58 [1-1/8"]
T
able3-2-4-5
. Piping "F", "G", "H" size selection rule
(mm [in.])
Total down-stream Indoor capacity
Pipe(Liquid)
Pipe(HP Gas)
Pipe(LP Gas)
P200 or less
ø9.52 [3/8"]
ø15.88 [5/8"]
ø19.05 [3/4"]
P201 to P300
ø9.52 [3/8"]
ø19.05 [3/4"]
ø22.20 [7/8"]
P301 to P350
ø12.70 [1/2"]
ø19.05 [3/4"]
ø28.58 [1-1/8"]
P351 to P400
ø12.70 [1/2"]
ø22.20 [7/8"]
ø28.58 [1-1/8"]
P401 to P450
ø15.88 [5/8"]
ø22.20 [7/8"]
ø28.58 [1-1/8"]
HP : High pressure, LP:Low pressure
EP300YLM-A1
EP350YLM-A1
0.42 [1.38']
0.47 [1.54']
EP500YLM-A1
0.50 [1.64']
EP300YLM-A1
EP350YLM-A1
ø19.05 [3/4"]
ø22.20 [7/8"]
ø19.05 [3/4"]
ø28.58 [1-1/8"]
EP500YLM-A1
ø22.20 [7/8"]
ø28.58 [1-1/8"]
OU : Outdoor Unit ; IU : Indoor Unit ; BC : BC controller
*1. Refer to the section 3-2-7.
*2. Details refer to Fig.3-2-4-1
*3. Farthest Indoor from BC controller "D+E+h or F+H+k" can exceed 40m till 60m if no Indoor sized P200, P250 connected.
Details refer to Fig.3-2-4-1
*4. Distance of Indoor sized P200, P250 from BC must be less than 10m, if any.
*5. When using 2 Sub BC controllers, max. height "h3" should be considered.
*7. 60m is available depending on the model and installation conditions. For more detailed information, contact your local distributor.
*6. 90m 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)
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.
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).
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 or cooling together.
Note8. For sub BC controller CMB-P•V-GB1 the connectable indoor unit capacities may sum to equal that of a
P350 unit or less. However, if two sub controllers are used the TOTAL sum of connectable units
connected to BOTH sub controllers must also not exceed that of a P350 unit.
For sub BC controller CMB-P1016V-HB1 the connectable indoor unit capacities may sum to equal that
or a P350 unit or less. However, if two sub controllers are used the TOTAL sum of connectable units
connected to BOTH sub controllers must also not exceed that of a P450 unit.
Note9. Indoor capactiy is described as its model size. For example, PEFY-P63VML-E, its capacity is P63.
Note10. 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.
S
T
M
N
CMY-R160-J1
(Gas side)
IU
CMY-R160-J1
(Liquid side)
BC controller
Fig. 3-2-4AA
OU : Outdoor unit, IU : Indoor unit
Fig. 3-2-4A Piping scheme
(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
Pipe length between the main BC
controller and indoor unit (m)
Note11. To enable the continuous heating mode, set SW4 (848) to ON.
PURY-EP-YLM-A1
Table3-2-4-4.
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"]
Table3-2-4-6
.
Piping "a", "b", "c", "d", "e", "f", "g", "h", "j", "k" 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"]
Total down-stream Indoor capacity
Pipe(Liquid)
Pipe(Gas)
P140 or less
ø9.52 [3/8"]
ø15.88 [5/8"]
T
able 3-2-4-1. Piping length limitation
(m [ft.])
Item
Piping in the figure
Max. length
Max. equivalent length
Total piping length
A+B+C+D+E+F+G+H+a+b+c+d+e+f+g+h+j+k
*1
-
Farthest IU from OU
A+F+H+k
165 [541']
190 [623']
Distance between OU and BC
A
110 [360'] *1
110 [360'] *1
Farthest IU from BC controller
D+E+h or F+H+k
40 [131'] *2*3
40 [131'] *2*3
Heignt between OU and IU (OU above IU)
H
50 [164'] *6
-
Heignt between OU and IU (OU under IU)
H'
40 [131'] *7
-
Height between IU and BC
h1
15 [49'] (10 [32']) *4
-
Height between IU and IU
h2
15 [49'] (10 [32']) *4
-
Heignt between BC(Main or Sub) and BC(Sub)
h3
15 [49'] (10 [32']) *5
-
h1
k
h3
h1
h2
j
F
G
H
BC controller (Sub BC)
BC controller (Sub BC)
H
H'
h1
A
OU
h
g
f
e
d
c
IU
IU
IU
IU
IU
IU
IU
IU
BC controller (Main BC)
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
