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Design of Mini VRF SYSTEM
1. Model Selecting and Capacity Calculator
Graph of indoor unit capacity characteristics (2 – (2))
Graph of capacity change characteristics resulting from tubing length and elevation difference (1 / 2 – (3))
<Cooling>
Elevation difference (m)
Elevation difference (m)
Base capacity
change rate
change rate
%
Equivalent length (m)
Equivalent length (m)
<Heating>
Base capacity
change rate
change rate
0
100
78
76
92
94
96
98
100
90
88
86
84
82
80
120 130 140
110
90
80
70
60
50
40
30
20
10
0
-10
-20
-30
-40
10
20
30
40
50
130
120
110
100
140
10
20
30
40
50
60
93
94
95
96
97
92
70
80
90
-10
-20
-30
-40
0
10
20
30
40
50
0
(Performance correction coefficients by elevation difference of refrigerant tube length [performance change rate ÷ 100] is
calculated by the following line map.)
Rate of cooling capacity change (%)
Indoor unit cooling capacity characteristics
Indoor unit heating capacity characteristics
indicates the rating point.
indicates the rating point.
Indoor air intake temp. (˚C WB)
140
130
120
110
100
60
70
80
90
15
14
25
24
23
22
21
20
19
18
17
16
Rate of heating capacity change (%)
Indoor air intake temp. (˚C DB)
120
115
110
105
100
70
65
60
27
28
29
30
26
25
24
23
22
21
20
19
18
17
16
75
80
85
90
95
%
100
98
99
TD831155-04_MINI VRF.indb 11
TD831155-04_MINI VRF.indb 11
2014/05/09 15:29:02
2014/05/09 15:29:02
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