Precharging Refrigerant - Huawei FusionCol8000-E240 User Manual

FusionCol8000-E240 Modular Indirect Evaporative
Cooling System
User Manual

8.4.13.4.3 Precharging Refrigerant

Prerequisites
Before charging refrigerant, ensure that air is exhausted from the pipe connected
to the refrigerant cylinder.
Context
● When charging refrigerant, you are advised to use a safety valve to prevent
refrigerant leakage during the removal of the rubber hose, which may cause
frostbite.
● Wear antifreeze gloves when performing refrigerant related operations.
● Fill the refrigerant (R410A) after checking that the cooling system does not
leak and the vacuum level meets the requirements.
Procedure
Step 1 Take off the vacuum pump from the vacuumizing device, and replace the vacuum
pump with a refrigerant cylinder.
Figure 8-25 Precharging refrigerant
(1) Refrigerant cylinder
(4) Connection nut
Step 2 Slightly open the refrigerant cylinder valve and slightly loosen the connection nut
of the pressure gauge and rubber hose. Tighten the nut when cold air escapes out
of the nut.
Step 3 Put the refrigerant cylinder upside down on the electronic balance. Clear the
reading on the balance.
Issue 01 (2021-01-30)
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(2) Electronic balance
(5) Low pressure needle valve
8 System Maintenance
(3) Pressure gauge
(6) Liquid pipe needle valve
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