Huawei NetCol5000-A - Material Preparations; Optional) Refrigerant R410 A

NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
3 Installation Guide
Issue 01 (2017-07-27)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
26
3.2.2 Material Preparations
Materials to be prepared onsite are classified into three categories:

Mandatory: mandatory configuration. This material is provided by Huawei and can be
found in delivered fittings.

Optional: This material can be purchased from Huawei or prepared by customers.

Engineering purchase: This material will not be delivered by Huawei, and customers
need to purchase it.
3.2.2.1 (Optional) Refrigerant R410A
Do not use low-quality refrigerant. Huawei is not responsible for any damage caused by
low-quality refrigerant.
Follow these suggestions to choose high-quality refrigerant:
1. Use high-quality brands such as DuPont, Daikin, or Honeywell.
2. Contact the refrigerant producer to confirm the refrigerant authenticity.
3. Check the refrigerant by following the steps shown in Figure 3-2: 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 qualified and should be replaced.
Figure 3-2 Checking refrigerant
Table 3-7 Mapping between temperatures and R410A saturation pressure
Temperature
(°C)
Saturation
Pressure-S
urface
Pressure
(MPa)
Temperature
(°C)
Saturation
Pressure-S
urface
Pressure
(MPa)
Temperat
ure (°C)
Saturation
Pressure-S
urface
Pressure
(MPa)