AG 31-011 • REFRIGERANT PIPING DESIGN 66 www.DaikinApplied.com
Table 40: R-410A Minimum Capacity For Suction Riser (kW)
Saturated
Suction
Temp
Suction
Gas
Temp
Pipe O .D . (mm)
(°C)
(°C)
12
15
18
22
28
35
42
54
67
79
92
105
-17
-12
0.586
1.113
1.905
2.93
5.86
10.26
16.1
33.70
60.36
93.8
140.6
196.3
-7
-12
0.674
1.275
2.344
3.37
6.89
12.0
18.8
38.97
68.86
108.4
161.2
225.6
5
-12
0.747
1.406
2.403
3.75
7.62
13.19
21.1
43.66
76.18
123.1
181.7
252.0
Refrigeration capacity in tons is based on 32°C liquid temperature and superheat as indicated by the listed temperature.
Multiplytable capacities by the following factors for other liquid line temperatures. (Table data based on line size pressure drop
Handbook Refrigeration 2006.)
Liquid Temperature (°C)
27
32
38
43
49
54
60
1.05
1.00
0.94
0.90
0.83
0.77
0.72
Table 41: R-407C Minimum Capacity For Suction Riser (kW)
Saturated
Suction
Temp
Suction
Gas
Temp
Pipe O .D . (mm)
(°C)
(°C)
12
15
18
22
28
35
42
54
67
79
92
105
-17
-12
0.447
0.850
1.450
2.26
4.60
8.06
12.6
26.07
46.00
73.25
108.4
152.4
-7
-12
0.527
0.996
1.699
2.67
5.42
9.38
14.94
30.77
54.21
86.44
128.9
178.7
5
-12
0.601
1.143
1.934
3.05
6.15
10.8
16.99
35.16
61.53
97.86
146.5
205.1
Refrigeration capacity in tons is based on 32°C liquid temperature and superheat as indicated by the listed temperature. Multiply
table capacities by the following factors for other liquid line temperatures. (Table data based on line size pressure drop formula
shown on page 2.17 of ASHRAE Handbook Refrigeration 2006.)
Liquid Temperature (°C)
27
32
38
43
49
54
60
1.05
1.00
0.95
0.90
0.85
0.80
0.74