Example Of Connection - Panasonic CU-5MX1SPP Manual De Instalación

Example of connection

Use exclusive refrigerant branch kits for R-407C.
Connection of 8 indoor units
indoor unit
line branch pipe
header branch pipe
Actual pipe length Pipe length between outdoor and indoor units ≤100m
Maximum allowable length between
outdoor and indoor units
Equivalent length
Allowable height between outdoor and Difference in
indoor units height
Allowable height between adjacent
indoor units
Actual pipe length Pipe length from first refrigerant branch kit (either line branch pipe or header branch pipe) to indoor units ≤40m
Allowable length after the branch
Refrigerant branch kit selection
Example of downstream indoor units
Pipe size selection
Pipe size = outer diameter x minimum wall thickness
(unit: mm)
Additional refrigerant to be charged
Calculation of additional refrigerant to be charged R(kg) is in
function of total length of liquid lines L and as follows:
CU-5MX1 R = [(Lø9.5)x0.06] + [(Lø6.4)x0.023]
CU-8,10MX1 R = [(Lø12.7)x0.12] + [(Lø9.5)x0.06] +
[(Lø6.4)x0.023]
NOTE Round off R to 1 decimal place.
If R is ≤0, keep the unit in operation.
Branch with line branch pipe
a b c d e f g
H1
A B C D E F G
p
h i j k l m n
1 2 3 4 5 6 7
H2
8
[Example] unit 8: a+b+c+d+e+f+g+p ≤100m
Equivalent pipe length between outdoor and indoor units ≤125m (Assume equivalent pipe length of line branch pipe to be 0.5m and of the header branch pipe to be 1.0m. (for calculation purposes))
Difference in height between outdoor and indoor units (H1) ≤50m (≤40m if outdoor unit is located in a lower position)
Difference in height between adjacent indoor units (H2) ≤15m
[Example] unit 8: b+c+d+e+f+g+p ≤40m
How to select the line branch pipe
• When using a line branch pipe at the first branch counted from the outdoor unit side, use CZ-P18BK11P
(CU-5MX1) or CZ-P37BK11P (CU-8,10MX1). [Example: line branch pipe A]
• For line branch pipes other than the first branch, select the proper branch kits based on the total capacity index
(refer to chapter "Combination") of indoor units installed after the first branch, using the following table.
Total capacity index of indoor units......... Branch kit
CU-5MX1 <100 ..................... CZ-P11BK11P
≥100 ..................... CZ-P18BK11P
CU-8,10MX1 <160 ..................... CZ-P18BK11P
≥160 ..................... CZ-P37BK11P
[Example]
in case of line branch pipe C;
indoor units 3+4+5+6+7+8
Between the outdoor unit and the uppermost stream refrigerant
branch kit
• Match the pipe size to the pipe size of the outdoor unit
Pipe size connected to outdoor unit
Gas Liquid
CU-5MX1 ø19.1 ø9.5
CU-8MX1 ø25.4 ø12.7
CU-10MX1 ø28.6 ø12.7
[Example] CU-5MX1
a: ø9.5 x 30m e: ø9.5 x 3m i: ø6.4 x 5m m: ø6.4 x 5m
b: ø9.5 x 5m f: ø9.5 x 2m j: ø6.4 x 5m n: ø6.4 x 5m
c: ø9.5 x 5m g: ø9.5 x 5m k: ø6.4 x 5m p: ø6.4 x 5m
d: ø9.5 x 5m h: ø6.4 x 5m l: ø6.4 x 5m
R = [ 55 x 0.06 ] + [ 40 x 0.023 ] = 4.22 ⇒ R = 4.2kg
NOTE Pipe diameter in case of non-availability of prescribed diameter.
• If pipe diameter ø25.4 mm is not available, ø28.6 mm can be used instead. Size-up of the piping diameter causes a small capacity and power input increase.
• If the piping is longer than 90 m and pipe diameter ø31.8 mm is not available, ø28.6 mm can be used instead.
Branch with line branch pipe and header branch pipe
i
a
A B
b j
H1
c d e f g h
1 2 3 4 5 6
[Example] unit 1: a+b+h ≤100m, ∆: a+i+j ≤100m
[Example] unit 6: b+h ≤40m, unit 7: i+k ≤40m
How to select the header branch pipe
• Select the proper branch kit based on the total capacity index (refer to chapter "Combination") of indoor units
installed after the header, using the following table.
• Branching is impossible between header branch pipe and indoor unit.
Total capacity index of indoor units......... Branch kit
CU-5MX1
CU-8,10MX1
[Example]
in case of line branch pipe B; indoor units 7+8,
in case of header branch pipe; indoor units 1+2+3+4+5+6
Between two immediately adjacent refrigerant branch kits
• Select the proper pipe size based on the total capacity index (refer to
chapter "Combination") of indoor units connected downstream, using the
following table.
Total capacity index Gas
<100 ø15.9
100-180 ø19.1
≥160 (CU-8,10MX1 only)
ø25.4
[Example] CU-8,10MX1
a: ø12.7 x 30m d: ø6.4 x 10m g: ø6.4 x 10m
b: ø12.7 x 10m e: ø6.4 x 10m h: ø6.4 x 20m
c: ø9.5 x 10m f: ø6.4 x 10m i: ø9.5 x 10m
R = [ 40 x 0.12 ] + [ 30 x 0.06 ] + [ 69 x 0.023 ] = 8.187 ⇒ R = 8.2kg
Size-up of the piping diameter to ø34.9 mm is not allowed.
Branch with header branch pipe
a
k
7 8
b c d e f g
H2
1 2 3 4 5 6
[Example] unit 8: a+i ≤100m
[Example] unit 8: i ≤40m
<100 ..................... CZ-P11HK11P (up to 4 branches)
≥100 ..................... CZ-P18HK11P (up to 8 branches)
<160 ..................... CZ-P18HK11P (up to 6 branches)
≥160 ..................... CZ-P37HK11P (up to 8 branches)
[Example]
in case of header branch pipe;
indoor units 1+2+3+4+5+6+7+8
Between refrigerant branch kit and indoor unit
• Select the proper pipe size based on the total capacity index (refer to
chapter "Combination") of indoor units connected downstream, using the
following table.
(Pipe size for direct connection to indoor unit must be the same as the
connection size of the indoor unit.)
Connection pipe size of indoor unit
Liquid Indoor unit capacity index
ø9.5 20 • 25 • 32 • 40
ø9.5 50 • 63 • 80
ø12.7 100 • 125
[Example] CU-8,10MX1
j: ø9.5 x 10m a: ø12.7 x 40m d: ø6.4 x 10m
k: ø6.4 x 9m b: ø9.5 x 20m e: ø6.4 x 20m
c: ø9.5 x 30m f: ø6.4 x 23m
R = [ 40 x 0.12 ] + [ 30 x 0.06 ] + [ 123 x 0.023 ] = 9.429 ⇒ R = 9.4kg
H1
h i
7
H2
8
Gas Liquid
ø12.7 ø6.4
ø15.9 ø9.5
ø19.1 ø9.5
g: ø6.4 x 20m
h: ø6.4 x 20m
i: ø6.4 x 30m