Follow these suggestions to choose high-quality refrigerant:
1. Contact the refrigerant producer to conrm the refrigerant authenticity.
2. Check the refrigerant by following the steps shown in Figure 3-1: Keep the
refrigerant indoors at a constant temperature and humidity for 24 hours. Use
a thermometer to measure the external surface temperature of the
refrigerant container, and connect a pressure gauge to the container to
measure its internal pressure. Determine the saturation pressure that
corresponds to the measured external surface temperature according to Table
3-7 and calculate the deviation from the measured internal pressure. If the
deviation is more than 0.2 MPa, the refrigerant is not
qualied and should be
replaced.
Figure 3-1 Checking refrigerant
Table 3-7 Mapping between temperatures and R410A saturation pressure
Temperature
(°C)
Saturation
Pressure-
Surface
Pressure
(MPa)
Temperatur
e (°C)
Saturatio
n
Pressure-
Surface
Pressure
(MPa)
Temperatu
re (°C)
Saturati
on
Pressur
e-
Surface
Pressur
e (MPa)
0 0.7 19 1.31 38 2.21
1 0.73 20 1.35 39 2.27
2 0.75 21 1.39 40 2.33
3 0.78 22 1.4 41 2.39
4 0.81 23 1.47 42 2.45
5 0.84 24 1.51 43 2.51
6 0.87 25 1.56 44 2.57
7 0.9 26 1.60 45 2.63
8 0.93 27 1.65 46 2.7
9 0.96 28 1.69 47 2.76
NetCol5000-A(025, 035) In-row Air Cooled Smart
Cooling Product
User Manual (600 mm Width) 3 Installation Guide
Issue 17 (2020-10-22) Copyright © Huawei Technologies Co., Ltd. 29
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