Precharging Refrigerant - Huawei NetCol5000-A User Manual

NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
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4.1.3 Precharging Refrigerant

Prerequisites
Before charging refrigerant, ensure that air is exhausted from the gas pipe connecting to the
refrigerant cylinder.
Context
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Procedure
Step 1 Remove the vacuum pump from the vacuumizing equipment, and replace the vacuum pump
with a refrigerant cylinder, as shown in
Issue 01 (2017-07-27)
If the precision of the pressure gauge is too low to display 60 Pa (absolute pressure), ensure that the
pressure gauge pointer stays at the minimum scale while vacuumizing the cooling system. Preserve the
pressure for 1 hour, and make sure the displayed pressure does not increase obviously.
Wear antifreeze gloves when performing refrigerant-related operations.
Charge refrigerant (R410A) right after checking that the cooling system does not leak and
the vacuum level meets the requirements.
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Figure 4-3 or Figure 4-4.
4 Commissioning
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