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REFRIGERANT PIPING AND CHARGE
Table of values for area boundaries
Concept
HEX Volume [dm
A
Pipe length [m]
HEX Volume [dm
A'
Pipe length [m]
HEX Volume [dm
B
Pipe length [m]
HEX Volume [dm
B'
Pipe length [m]
HEX Volume [dm
C
Pipe length [m]
HEX Volume [dm
C'
Pipe length [m]
HEX Volume [dm
D
Pipe length [m]
HEX Volume [dm
E
Pipe length [m]
α
-
β
-
L_0 [m]
-
V_0 [dm
]
-
3
7.5 CYCLE DESIGN EVAPORATING AND CONDENSING TEMPERATURES
Please make sure that the Heat Exchanger element to be connected to the DX-Interface series 2 satisfies the following installation
and design requirements. Failure to satisfy any of the items below may cause unappropriated system response, malfunction of any
of the system components, and/or damage to the components..
-
The design pressure of the system is 4.15 MPa. The compression strength of the pipes must exceed 12.45 MPa (3 times the
design pressure)
The inner volume of the heat exchanger piping must be within the limits specified in the technical documentation of each
-
DX-Interface series 2. Please make sure the design of the heat exchanger as well as the refrigerant charge follow such
limitations.
-
The capacity of the heat exchanger must meet the specified nominal capacity of each DX-Interface series 2 under the
following temperature conditions. Failure to ensure heat exchanger capacity may lead to system malfunction.
Design temperatures
Air temperature:
Condensing Temperature:
Subcooling Temperature:
12
PMML0293A rev.2 - 08/2016
2 HP
2.5 HP
]
0.57
0.89
3
50
50
]
0.57
0.89
3
30
30
]
1.16
1.35
3
50
50
]
1.16
1.35
3
30
30
]
1.4
1.59
3
30
30
]
1.4
1.59
3
10
10
]
1.64
1.83
3
10
10
]
-
-
3
-
-
0.03
0.03
Interpolation with points V
1.16
1.35
Heating
DX-interface HEX (T
): 20ºC(DB)
in
Outdoor: 7ºC(DB)/6ºC(WB)
40ºC ~ 45ºC
3ºC
DX-Interface HP
3 HP
4 HP
5 HP
1.03
1.51
1.92
50
75
75
1.03
1.51
1.92
30
30
30
1.57
2.37
2.37
50
75
75
1.57
2.37
2.37
30
30
30
2.23
3.03
3.03
30
55
55
2.23
3.03
3.03
10
10
10
2.89
3.9
3.9
10
30
30
-
4.56
4.56
-
10
10
0.04
0.06
0.06
1.26
30m if HEX Volume ≤ V
& V
if V
< HEX Volume < V
B'
C'
B'
10m if HEX Volume ≥ V
1.57
2.37
2.37
Design temperatures
Air temperature:
Evaporation Temperature:
Superheating Temperature:
6 HP
8 HP
10 HP
1.92
2.92
75
100
1.92
2.92
30
30
2.92
3.89
75
100
2.92
3.89
30
30
3.58
4.55
55
80
3.58
4.55
10
10
4.45
6.27
30
30
5.11
6.93
10.73
10
10
0.06
0.06
B'
C'
C'
2.92
3.89
Cooling
DX-Interface HEX (T
in
27ºC(DB)/19ºC(WB)
Outdoor: 35ºC(DB)
6ºC
5ºC
3.89
100
3.89
30
4.76
100
4.76
30
6.06
80
6.06
10
9.43
30
10
0.12
4.76
):
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