Mitsubishi Electric HP120TNU-A Service Handbook page 61

[2-10 Restrictions on Refrigerant Pipes ]
(2) System that requires more than 16 BC controller ports or with multiple BC controllers <System
with one outdoor unit>
Note1. No Header usable on PURY 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 length+"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). The indoor units connected to the same port must be set to operate in the same
mode. Set them in the same group to make them run/stop in the same mode all together. For other options,
enable the thermo setting on the remote controller, or set the common thermostat (optional) to run/stop the
units in the same mode based on a representative temperature.
Note7. The maximum total capacity of indoor units that can be connected to each sub BC controller CMB-P • NU-KB1
is 126.
Note8. Indoor capactiy is described as its model size. For example, PEFY-P24NMAU-E3, its capacity is P24.
Note9. 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.
Note10. To connect the BC controller to the main pipe, use the reducer (CMY-R301S-G, CMY-R302S-G1, or CMY-R304S-G1).
Note11. To connect the sub BC controller to the main BC controller, use the reducer (CMY-R303S-G1, CMY-R305S-G1, or CMY-R306S-G).
Note12. Install the pipes correctly referring to the section titled "Outdoor Twinning Kit."
Note13. Up to 11 sub BC controllers can be connected.
OU
Pipe (High pressure)
Pipe (Low pressure)
A
H H'
A
BC controller (Main BC)
CMY-R160-J1 (joint)
a
h1
a b
b
B C
B C
c
c
IU
IU IU
(joint_A)
Max. 3 sets for 1 port.
(P05-P54) (P72-P96)
CMY-Y102SS-G2
Total capacity < = P54
CMY-Y102LS-G2
CMY-R160-J1 (joint)
Fig. D Piping scheme
Piping length limitation *10
Item
Total piping length (Total length of high pressure and liquid pipes)
Farthest IU from OU
Distance between OU and BC
Farthest IU from BC controller
Farthest IU from BC controller via Sub BC controller
Height between OU and IU (OU above IU)
Height between OU and IU (OU under IU)
Height between IU and BC
Height between IU and IU
Heig h t between BC(Main or Sub) and BC(Sub)
OU: Outdoor Unit; IU: Indoor Unit; BC: BC controller
*1. Refer to the pages 36, 37.
*2. Details refer to Fig. 2.
*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. When using 2 or more Sub BC controllers, max. height "h3" should be considered.
*7. 90 m is available depending on the model and installation conditions. For more detailed
information, contact your local distributor.
*8. 60 m is available depending on the model and installation conditions. For more detailed
information, contact your local distributor.
*9. When the piping length or the vertical separation exceeds the limit specified in Fig. 2, connect a sub BC to the system. The restriction for a system with
a sub BC connection is shown in Fig. 3. When a given system configuration falls within the shaded area in Fig. 3, increase the
size of the high-pressure pipe and the liquid pipe between the main BC and sub BC by one size. When using P12, P15, P18, P36, or P48 model of
indoor units, increase the size of the liquid branch pipe between the sub BC and indoor unit by one size.
When using indoor models P54 or larger, the restrictions shown in Fig. 2 cannot be exceeded.
*10. Total length of high-pressure pipes and liquid pipes
32
- chapter 2
(P05-P54)
(joint_B)
IU
CMY-R201S-G
j j
CMY-R202S-G
BC controller (Sub BC)
F G
F
F
D
E
D
E
g
f
g
f
e
e
d
d
IU IU
IU IU
Max. 3 sets for 2 port.
P54 < Total capacity < = P96
IU (each) max < = P54
Piping in the figure
A+B+C+D+E+F+G+J+K+a+b+c+d+e+f+g+i+j+k+m+n
A+F+G+J+K+n
A
D+E+i
F+G+J+K+n
H
H'
h1
h2
h3
CMY-R160-J1
(Liquid side)
M
BC controller
S
T
CMY-R160-J1
(Gas side)
Fig. C
J
G J
G
J
BC controller (Sub BC) BC controller (Sub BC)
Pipe
k
i i
(Liquid)
k
IU IU
Pipe (Gas)
(P05-P54) (P05-P54)
Max. length
*1
165 [541']
110 [360'] *1
60 [197'] *2*3
90 [295'] *9
50 [164'] *7
40 [131'] *8
15 [49'] (10 [32']) *4
30 [98'] (20 [65']) *5
15 [49'] (10 [32']) *6
Bent equivalent length
Outdoor Model
HP72T/YNU
HP96T/YNU
HP120T/YNU
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)
Pipe (LP Gas)
Pipe (Liquid)
Pipe (HP Gas)
h1
K
K
h3
K
h2
BC controller (Sub BC)
m
n
m
h1
n
IU
IU
(P05-P54)
OU: Outdoor unit, IU: Indoor unit
(m [ft.])
Max. equivalent length
-
190 [623']
110 [360'] *1
60 [197'] *2*3
90 [295'] *9
-
-
-
-
-
M(m/bent [ft./bent])
0.35 [1.15']
0.42 [1.38']
0.50 [1.64']
HWE18220_GB