Huawei FusionDC1000A Maintenance Manual page 77

FusionDC1000A Prefabricated All-in-One Data
Center
Maintenance Guide (IT Scenario)
Reclaim or dispose of the refrigerant in accordance with local laws and
regulations. Do not discharge the refrigerant to the atmosphere. During the
reclaim process, the R410A refrigerant composition may change. Therefore, you
are not advised to refill the reclaimed R410A refrigerant to the cooling system.
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Issue 01 (2021-04-20)
CA UTION
Prepare a pressure gauge with two hoses, connect one hose to the outdoor
unit needle valve 10 minutes after the smart cooling product has been shut
down, and connect the other hose to nearby sheet metal, such as a smart
cooling product supportive leg or support.
Figure 4-13 Discharging refrigerant
NO TE
– Bind the rubber hose to the sheet metal adjacent to the outdoor unit needle valve.
– The hose should be bound at a position close to the hose outlet to a tension not
squeezing the hose.
Slowly open the valve on the pressure gauge to start discharging refrigerant.
NO TE
When discharging the refrigerant, verify that refrigerant oil does not flow out of the
hose. If a small amount of refrigerant oil continually flows out of the hose, place a
vessel or rag under the hose to catch the refrigerant oil.
Keep the pressure gauge valve open after the refrigerant draining slows down
after a period of time until no refrigerant is obviously flowing out.
Wear anti-freezing gloves and press the needle valves on the smart cooling
product indoor unit to check whether refrigerant flows out.
– If refrigerant flows out, perform
corresponding needle valve.
– If no refrigerant flows out, go to
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Step 10.1–Step 10.3
Step 10.5.
4 Parts Replacement
on the
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