PQRY-P-T(S)LMU, Y(S)LMU (April 2017 Ver2)
WR2-141
© 2017 Mitsubishi Electric US, Inc.
12. PIPING DESIGN
Table12-2-3-1. Piping length limitation
12-2-3.IF more than 16 ports are in use, or if there is more than one BC controller in use for two heat source units
(m [ft.])
Table12-2-3-2. Bent equivalent length "M"
Item
Piping in the figure
Max. length
Max. equivalent length
Heat source Model
M (m/bends [ft./bends])
Total piping length
J+K+L+A+B+C+D+E+F+G+H+a+b+c+d+e+f+g+h+j+k *1
-
P144TSLMU,YSLMU
P288TSLMU,YSLMU
Farthest IU from HU
J(K)+A+F+H+k
165 [541']
190 [623']
Distance between HU and BC
J(K)+A
110 [360'] *1
110 [360'] *1
P312TSLMU,YSLMU
Farthest IU from BC controller
D+E+h or F+G+j or F+H+k
40 [131'] *2
40 [131'] *2
P336TSLMU,YSLMU
Height between HU and IU (HU above IU)
H
50 [164' ]
-
Height between HU and IU (HU under IU)
H'
40 [131' ]
-
Height between IU and BC
h1
15 [49'] (10 [32']) *3
-
Height between IU and IU
h2
15 [49'] (10 [32']) *3
-
Height between BC(Main or Sub) and BC(Sub) h3
15 [49'] (10 [32']) *4
-
0.50 [1.64']
0.70 [2.29']
0.70 [2.29']
0.80 [2.62']
0.50 [1.64']
0.50 [1.64']
0.50 [1.64']
0.50 [1.64']
Distance between Main unit and Sub unit
J+K or L
5 [16']
-
Height between Main unit and Sub unit
h4
0.1 [0.3' ]
-
Fig. 12-2-3-2 Piping length and height between IU and BC controller
Table12-2-3-3. Piping "A"size selection rule
(mm [in.])
Heat source Model
Pipe(High pressure)
Pipe(Low pressure)
P144-192TSLMU,YSLMU
ø22.20 [7/8"]
ø28.58 [1-1/8"]
P216TSLMU,YSLMU
ø22.20 [7/8"] *5
ø28.58 [1-1/8"]
P240TSLMU,YSLMU
ø22.20 [7/8"] *5
ø34.93 [1-3/8"]
P288-312TSLMU,YSLMU
ø28.58 [1-1/8"]
ø34.93 [1-3/8"]
P336TSLMU,YSLMU
ø28.58 [1-1/8"]
ø41.28 [1-5/8"]
Table12-2-3-4. Piping "B", "C", "D", "E" size seleciton rule
(mm [in.])
Total down-stream Indoor capacity
Pipe(Liquid)
Pipe(Gas)
P73-P96
ø9.52 [3/8"]
ø22.20 [7/8"]
Table12-2-3-5. Piping "F", "G", "H" size selection rule
(mm [in.])
Total down-stream Indoor capacity
Pipe(Liquid)
Pipe(HP Gas)
Pipe(LP Gas)
P72 or less
ø9.52 [3/8"]
ø15.88 [5/8"]
ø19.05 [3/4"]
P73 to P108
ø9.52 [3/8"]
ø19.05 [3/4"]
ø22.20 [7/8"]
P109 to P126
ø12.70 [1/2"] ø19.05 [3/4"]
ø28.58 [1-1/8"]
P127 to P144
ø12.70 [1/2"] ø22.20 [7/8"]
ø28.58 [1-1/8"]
P145 to P168
ø15.88 [5/8"] ø22.20 [7/8"]
ø28.58 [1-1/8"]
HP: High pressure, LP: Low pressure
Table12-2-3-6. Piping "J", "K", "L" size selection rule
(mm [in.])
Table12-2-3-7. Piping "a", "b", "c", "d", "e", "f", "g", "h", "j", "k"size selection rule
(mm [in.])
Heat source Model
Pipe(High pressure)
Pipe(Low pressure)
Indoor Unit size
Pipe(Liquid)
Pipe(Gas)
P72THMU,YHMU
ø15.88 [5/8"]
ø19.05 [3/4"]
P06 to P18
ø6.35 [1/4"]
ø12.70 [1/2"]
P96THMU,YHMU
ø19.05 [3/4"]
ø22.20 [7/8"]
P24 to P54
ø9.52 [3/8"]
ø15.88 [5/8"]
P120THMU,YHMU
ø19.05 [3/4"]
ø28.58 [1-1/8"]
P72
ø9.52 [3/8"]
ø19.05 [3/4"]
P96
ø9.52 [3/8"]
ø22.20 [7/8"]
P168TSLMU,YSLMU
P192TSLMU,YSLMU
P216TSLMU,YSLMU
P240TSLMU,YSLMU
P55-P72
ø9.52 [3/8"]
ø19.05 [3/4"]
P54 or less
ø9.52 [3/8"]
ø15.88 [5/8"]
HU: Heat source Unit; IU: Indoor Unit; BC: BC controller
*1. Please refer to Fig.12-2-4
*2. Farthest Indoor from BC controller "D+E+h or F+G+j or F+H+k" can exceed 40 m [131 ft.] till 60 m [197 ft.] if no Indoor sized P72, P96 connected.
Details refer to Fig.12-2-3-2
*3. Distance of Indoor sized P72, P96 from BC must be less than 10 m [32 ft.], if any.
*4. When using 2 Sub BC controllers, max. height "h3" should be considered.
IU: Indoor unit
Fig. 12-2-3-1 Piping scheme
Note1. PQRY systems do not require headers.
Note2. Indoor units sized P72-P96 should be connected to a BC controller using the Y-shaped
CMY-R160-J1 joint adapter. These indoor units cannot use the same BC controller ports
as other units. (They must use their own individual BC controller port.)
Note3. As bends cause pressure loss on transportation of refrigerant, the fewer bends in the system,
the better it is. Piping length needs to factor in the actual length and equivalent length in which
the bends are counted.
Note4. Indoor units connected to the BC controller sharing one port cannot operate separately in heating
and cooling modes simultaneously; i.e., they must function in either heating or cooling in tandem.
Note5. For sub BC controller CMB-P-NU-GB1, the total connectable indoor unit capacity can be 126,000 BTUs or
less. If two sub BC controllers are used, the total indoor unit capacity connected to BOTH sub BC
controllers also cannot exceed 126,000 BTUs.
For sub BC controller CMB-P1016NU-HB1 the total connectable indoor unit capacity can be 126,000 BTUs
or less. However, if two sub controllers are used, the total indoor unit capacity connected to BOTH sub
controllers must NOT exceed 168,000 BTUs.
Note6. Indoor unit capacities are included in the model name. For example, PEFY-P24NMSU-E has a
capacity of 24,000 BTUs.
Note7. Total "downstream indoor capacity" is the total of all the indoor units connected downstream.
For example, PEFY-P24NMSU-E + PEFY-P12NMSU-E: Total Indoor Unit Capacity = P24 + P12 = P36.
*5. When the piping length is 65 m or longer, use the ø28.58 [1-1/8] pipe for the part
that exceeds 65 m.
Main unit
Sub unit
A
J
L
h4
Outdoor Twinning kit (High/Low press.)
CMY-R100VBK-A: Outdoor unit P400 to P500
CMY-R100VBK2: Outdoor unit P550 to P650
CMY-R200VBK2: Outdoor unit P700 to P800
CMY-R200XLVBK: Outdoor unit P850 to P900
K
The Low press. kit is set in the Main unit;
The High press. kit is to be installed in the field.
h1
k
h3
h1
h2
j
F
G
H
BC controller (Sub BC)
BC controller (Sub BC)
H
H'
h1
h
g
f
e
d
c
IU
IU
IU
IU
IU
IU
IU
IU
BC controller (Main BC)
(P06-P54)
(P72-P96)
CMY-R160-J1 (joint)
Not possible to remove
Refer to the
installation manual
for the connection
B
C
D
IU
E
a
b
CMY-R160-J1 (joint)
Not possible to remove
IU
CMY-Y202S-G2
CMY-Y102LS-G2
CMY-Y102SS-G2
(joint)
Max. 3 sets for 1 port.
Total capacity < = P54
Max. 3 sets for 1 port.
P54 < Total capacity < = P96
IU (each) max < = P54