Panasonic U-120MF2U9, Technical Data Manual, Page: 30 / 181

Design of 3WAY VRF SYSTEM
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1. Model Selection and Capacity Calculator
Design of 2WAY VRF SYSTEM
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1. Model Selecting and Capacity Calculator
3. Graph of capacity correction coeffi cients
Graph of outdoor unit capacity characteristics (1 – (2))
Outdoor unit cooling capacity characteristics Outdoor unit heating capacity characteristics
Outdoor unit heating capacity correction coeffi cient during frosting / defrosting (1 – (4))
* To calculate the heating capacity with consideration for frosting / defrosting operation, multiply the heating capacity found
from the capacity graph by the correction coefficient from the table above.
80
85
90
95
100
105
110
115
120
125
14 23 32 41 50 59 68 77 86 95 104 113 122
Surplus capacity correction
coefficient(%)
Outdoor air intake temp. (°F DB) Outdoor air intake temp. (°F WB)
80
85
90
95
100
105
110
115
120
125
-13 2 8 14 20 26 32 38 44 50 56 62
64
68
Surplus capacity correction
coefficient(%)
Outdoor intake air temp.
(°FWB RH85%)
-4 5 14 17 21 23 24 28 30 32 33 35 36 37 39 41 42
Correction coefficient
0.97
-13
0.97 0.97 0.97 0.96 0.94 0.91 0.89 0.87 0.87 0.87 0.88 0.89 0.9 0.91 0.92 0.95 1.00
7'B86$B:$<B95)LQGE
Design of 2WAY VRF SYSTEM
1. Model Selecting and Capacity Calculator
Graph of indoor unit capacity characteristics (2 – (2))
Indoor unit cooling capacity characteristics Indoor unit heating capacity characteristics
Graph of capacity change characteristics resulting from tubing length and elevation difference (1 / 2 – (3))
<Cooling>
Base capacity
change rate
The positive side for the elevation difference indicates that the outdoor unit is installed at a higher position than the indoor units.
The negative side indicates the opposite.
(Performance correction coefficients by elevation difference of refrigerant tube length [performance change rate ÷ 100] is
calculated by the following line map.)
60
70
80
90
100
110
120
130
140
57 59 61 63 65 67 69 71 73 75 77
Surplus capacity correction coefficient(%
)
Indoor air intake temp. (°F WB)
100
98
96
94
92
90 88 86 84 82 80 78 76 74 72 70 68 66 64
-131
-98
-66
-33
0
33
66
98
131
164
0 33 66 98 131 164 197 230 262 295 328 361 394 427 459 492 525 558 591 623 656 689
Elevation difference(ft)
Equivalent length(ft)
Base capacity
change rate
<Heating>
Equivalent length(ft)
-131
-98
-66
-33
0
33
66
98
131
164
33 0 66 98 131 164 197 230 262 295 328 361 394 427 459 492 525 558 591 623 656 689
Elevation difference(ft)
indicates the rating point.
7'B86$B:$<B95)LQGE
Indoor air intake temp. (°F DB)
60
70
80
90
100
110
120
130
140
59 62
61
65 68 71 74 77 80 83 86
Surplus capacity correction coefficient(%
)
indicates the rating point.
%
100
96
97
93 94
95
92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76
98
99
TD831183-00_北米向け3WAY.indb 14 15/12/17 16:05:09