Mitsubishi Electric BDT CITY MULTI Installation And Pre-Commissioning Booklet page 15

3. Piping Design
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
PURY-EP-YLM
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 bends cause pressure loss on transportation of refrigerant, fewer bends design is better ;
Piping length needs to consider the actual length and equivalent length which bends are counted.
Equivalent piping length (m)=Actual piping length+"M" x Number of bends.
Note5. Set DIP-SW 4-6 to ON of BC controller, in case of connected Indoor unit sized P100-P140 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).
However, the cooling capacity decreases a little (For details, refer to the chapter OUTDOOR UNITS,
R2 SERIES, 6-4. Correction by port counts of the BC controller).
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. Indoor capactiy is described as its model size. For example, PEFY-P63VMA-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-P63VMA-E + PEFY-P32VMA-E : Total Indoor capacity = P63 + P32 = P95.
Note10. To enable the continuous heating mode, set SW4 (848) to ON.
OU
H H'
Reducer (P15~P50)
(attached with BC controller)
h1
Fig. 3-2-1A Piping scheme
Table 3-2-1-1 . Piping length limitation
Item
Total piping length
Farthest IU from OU
Distance between OU and BC
Farthest IU from BC controller
Heignt between OU and IU (OU above IU) H
Heignt between OU and IU (OU under IU) H'
Height between IU and BC
Height between IU and IU
OU : Outdoor Unit ; IU : Indoor Unit ; BC : BC controller
*1. Refer to the section 3-2-7.
*2. Details refer to Fig.3-2-1-1
*3. Farthest Indoor from BC controller "B+d" can exceed 40m till 60m if no Indoor sized P200, P250 connected. Details refer to Fig.3-2-1-1
*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.
Fig. 3-2-1-1 Piping length and height between IU and BC controller
70
60
50
40
30
20
10
0
0 5
Height difference between the main BC controller
and indoor unit (m)
A
For outodoor units equal to or larger than a size P400, on
the BC controller please ensure CMB-P
BC controller
a Joint
b
(CMY-R160-J1)
IU IU
(P15-P80) (P100-250)
Piping in the figure Max. length
A+B+a+b+c+d *1
A+B+d 165 [541']
A 110 [360'] *1
B+d 40 [131'] *2*3
50 [164'] *5
40 [131'] *6
h1 15 [49'] (10 [32']) *4
h2 15 [49'] (10 [32']) *4
Table3-2-1-3. Piping "A"size selection rule
Table3-2-1-4. Piping "B" size seleciton rule
Table3-2-1-5. Piping "a", "b", "c", "d" size selection rule (mm [in.])
10 15
CMY-R160-J1
Liquid
( side)
M
BC controller
S
T
CMY-R160-J1
( Gas side)
Fig. 3-2-1AA
V-GA1 is used.
•
IU
Joint
(CMY-Y102SS-G2)
d
h2
B
c
IU
Max.3 sets for 1 port.
Total capacity <= P80
(m [ft.])
Table3-2-1-2. Bent equivalent length "M"
Max. equivalent length
-
190 [623']
110 [360'] *1
40 [131'] *3
-
-
-
-
Outdoor Model Pipe(High pressure)
EP200YLM ø15.88 [5/8"]
EP250YLM ø19.05 [3/4"]
EP300YLM ø19.05 [3/4"]
EP350YLM ø19.05 [3/4"]
EP400YLM ø22.20 [7/8"]
EP450YLM ø22.20 [7/8"]
Total down-stream Indoor capacity Pipe(Liquid)
P140 or less ø9.52 [3/8"]
Indoor Unit size Pipe(Liquid)
P15 to P50, GUF-50RD(H) ø6.35 [1/4"]
P63 to P140, GUF-100RD(H) ø9.52 [3/8"]
P 2 0 0 ø 9 5 .
P 2 5 0 ø 9 5 .
AN1 2nd
Joint CMY-R160-J1 Liquid side
226
(M)ø3/8"(Brazing)
(N)ø9.52ID
(M)ø3/8"(Brazing)
Joint CMY-R160-J1 Gas side
N
226
(S)ø5/8"(Brazing)
IU
(T)ø19.05ID
(S)ø5/8"(Brazing)
Outdoor Model M (m/bent [ft./bent])
EP200YLM 0.35 [1.15']
EP250YLM 0.42 [1.38']
EP300YLM 0.42 [1.38']
EP350YLM 0.47 [1.54']
0.50 [1.64']
EP400YLM
EP450YLM 0.50 [1.64']
(mm [in.])
Pipe(Low pressure)
ø19.05 [3/4"]
ø22.20 [7/8"]
ø22.20 [7/8"]
ø28.58 [1-1/8"]
ø28.58 [1-1/8"]
ø28.58 [1-1/8"]
(mm [in.])
Pipe(Gas)
ø15.88 [5/8"]
Pipe(Gas)
ø12.70 [1/2"]
ø15.88 [5/8"]
2 3 [ 8 / ] " ø 1 9 0 . 5 3 [ 4 / ] "
2 3 [ 8 / ] " ø 2 2 2 . 0 7 [ 8 / ] "
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