AG 31-011 • REFRIGERANT PIPING DESIGN 68 www.DaikinApplied.com
Table 44: R-410A minimum Capacity For Discharge Riser (kW)
Saturated
Suction
Temp
Discharge
Temp
Pipe O .D .
(mm)
(°C)
(°C)
12
15
18
22
28
35
42
54
67
79
92
105
27
60
1.160
2.15
3.727
5.590
11.2
19.5
30.8
48.5
85.79
136.8
203.2
287.3
38
71
1.195
2.21
3.839
5.758
11.6
20.1
31.7
49.9
88.36
140.9
209.3
295.9
49
82
1.231
2.28
3.954
5.931
11.9
20.7
32.6
51.4
91.02
145.1
215.6
304.8
Refrigeration capacity in tons based on saturated suction temperature of 4°C with -10°C superheat at indicated saturated
condensing temperature with -10°C sub-cooling. For other saturated suction temperatures with -10°C superheat, use correction
factors in the following table. (Table data based on line size pressure drop formula shown on page 2.17 of
Refrigeration 2006.)
Saturated Suction Temperature (°C)
-18
-7
4
16
0.90
0.94
1.00
1.06
Table 45: R-407C Minimum Capacity For Discharge Riser (kW)
Saturated
Suction
Temp
Discharge
Temp
Pipe O .D . (mm)
(°C)
(°C)
12
15
18
22
28
35
42
54
67
79
92
105
27
60
1.020
1.87
3.210
4.887
9.81
17.1
26.9
42.54
74.89
119.6
178.3
251.0
38
71
1.050
1.92
3.306
5.034
10.1
17.6
27.8
43.82
77.14
123.1
183.7
258.6
49
82
1.082
1.98
3.406
5.185
10.4
18.1
28.6
45.14
79.45
126.8
189.1
266.3
Refrigeration capacity in tons based on saturated suction temperature of 4°C with -10°C superheat at indicated saturated
condensing temperature with -10°C sub-cooling. For other saturated suction temperatures with -10°C superheat, use correction
factors in the following table. (Table data based on line size pressure drop formula shown on page 2.17 of ASHRAE Handbook
Refrigeration 2006.)
Saturated Suction Temperature (°C)
-18
-7
4
16
0.96
0.98
1.00
1.02