Mitsubishi Electric PQRY-P72TLMU-A Manual page 140

12. PIPING DESIGN
12-2-2. IF more than 16 ports are in use, or if there is more than one BC controller in use for one heat source unit
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.
HU
Refer to the
installation manual
H H'
for the connection
h1
(P06-P54)
CMY-R160-J1 (joint)
Not possible to remove
Fig. 12-2-2-1 Piping scheme
Table . Piping length limitation
12-2-2-1
Item
Total piping length
Farthest IU from HU
Distance between HU and BC
Farthest IU from BC controller
Height between HU and IU (HU above IU )
Height between HU and IU (HU under IU )
Height between IU and BC
Height between IU and IU
Height between BC(Main or Sub) and BC(Sub) h3
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+H+k" can exceed 40 m [131 ft.] till 60 m [197 ft.] if no Indoor sized P72, P96 connected.
Details refer to Fig.12-2-2-2
*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.
Fig. 3-2-2-2 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 farthest indoor unit (m)
250
200
150
100
50
0
0 5 10 15 20
Height difference between the main BC controller
and farthest indoor unit (ft)
WR2-140
A
BC controller (Main BC)
B C
a b
c d
IU IU IU IU
(P72-P96)
Max. 3 sets for 1 port.
Total capacity < = P54
Piping in the figure
A+B+C+D+E+F+G+H+a+b+c+d+e+f+g+h+j+k *1
A+F+H+k
A
D+E+h or F+H+k
H
H'
h1
h2
Table12-2-2-3. Piping "A"size selection rule
Heat source Model
P72TLMU,YLMU
P96-120TLMU,YLMU
P144-192TLMU,YLMU
P216TLMU,YLMU
P240TLMU,YLMU
*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.
Table12-2-2-4. Piping "B", "C", "D", "E" size selection rule
Total down-stream Indoor capacity
P54 or less
10 15
P55-P72
P73-P96
Table12-2-2-5
Total down-stream Indoor capacity
P72 or less
P73 to P108
P109 to P126
P127 to P144
P145 to P168
HP: High pressure, LP: Low pressure
Table12-2-2-6
25 30 35 40 45 Indoor Unit size
P06 to P18
P24 to P54
P72
P96
PQRY-P-T(S)LMU, Y(S)LMU (April 2017 Ver2)
CMY-R160-J1 (joint)
Not possible to remove
j
F
G BC controller (Sub BC)
H
BC controller (Sub BC)
D
E
g
e f h
IU IU IU IU
Max. 3 sets for 1 port.
P54 < Total capacity < = P96
IU (each) max < = P54
HU: Heat source unit, IU: Indoor unit
(m [ft.])
Max. length Max. equivalent length
-
165 [541'] 190 [623']
110 [360'] *1 110 [360'] *1
40 [131'] *2 40 [131'] *2
-
50 [164']
-
40 [131']
15 [49'] (10 [32']) *3 -
15 [49'] (10 [32']) *3 -
15 [49'] (10 [32']) *4 -
Pipe(High pressure)
ø15.88 [5/8"]
ø19.05 [3/4"]
ø22.20 [7/8"]
ø22.20 [7/8"] *5
ø22.20 [7/8"] *5
Pipe(Liquid)
ø9.52 [3/8"]
ø9.52 [3/8"]
ø9.52 [3/8"]
Piping "F", "G", "H" size selection rule
.
Pipe(Liquid)
ø9.52 [3/8"]
ø9.52 [3/8"]
ø12.70 [1/2"]
ø12.70 [1/2"]
ø15.88 [5/8"]
, "e", "f", "g", "h", "j", "k"
. Piping "a", "b", "c", "d"
IU
h1
h3
h2
h1
k
IU
Table12-2-2-2. Bends equivalent length "M"
Heat source Model M (m/bends [ft./bends])
P72TLMU,YLMU 0.35 [1.15']
0.42 [1.38']
P96TLMU,YLMU
P120TLMU,YLMU 0.47 [1.54']
P144TLMU,YLMU 0.50 [1.64']
P168TLMU,YLMU 0.50 [1.64']
P192TLMU,YLMU 0.50 [1.64']
P216TLMU,YLMU 0.50 [1.64']
P240TLMU,YLMU 0.50 [1.64']
(mm [in.])
Pipe(Low pressure)
ø19.05 [3/4"]
ø22.20 [7/8"]
ø28.58 [1-1/8"]
ø28.58 [1-1/8"]
ø34.93 [1-3/8"]
(mm [in.])
Pipe(Gas)
ø15.88 [5/8"]
ø19.05 [3/4"]
ø22.20 [7/8"]
(mm [in.])
Pipe(HP Gas) Pipe(LP Gas)
ø15.88 [5/8"] ø19.05 [3/4"]
ø19.05 [3/4"] ø22.20 [7/8"]
ø19.05 [3/4"] ø28.58 [1-1/8"]
ø22.20 [7/8"] ø28.58 [1-1/8"]
ø22.20 [7/8"] ø28.58 [1-1/8"]
size selection rule (mm [in.])
Pipe(Liquid) Pipe(Gas)
ø6.35 [1/4"] ø12.70 [1/2"]
ø9.52 [3/8"] ø15.88 [5/8"]
ø9.52 [3/8"] ø19.05 [3/4"]
ø9.52 [3/8"] ø22.20 [7/8"]
© 2017 Mitsubishi Electric US, Inc.