Huawei FusionModule500 User Manual page 109

FusionModule500 Smart Mini Data Center
User Manual
Step 7 After ensuring that the pressure does not rise, open the stop valves for the gas
pipe and liquid pipe of the outdoor unit.
● After the outdoor unit stop valves are opened, the refrigerant in the outdoor
● After the vacuumization and before removing the rubber hose, ensure that
Step 8 For the unit configured with a low ambient kit, perform vacuumization through
the needle valves before and after the expansion valve of the indoor unit as well
as the needle valve of the liquid outlet pipe of the liquid storage tank to ensure
that all pipes are vacuumized. If a check valve is installed on the system pipe,
vacuumize through the upstream and downstream parts of the check valve.
Step 9 Add refrigerant oil.
Refrigerant will cause the refrigerant oil in the system to be diluted, which affects
the lubrication and cooling effect of the refrigerant oil. Therefore, you need to add
refrigerant oil. The model of the refrigerant oil used by the unit is FV50S. If
refrigerant oil of an incorrect model is used, the compressor may be irreversibly
damaged.
Refrigerant oil has been added to the unit based on the standard pipe length
before delivery. If the pipe between the indoor unit and outdoor unit is longer
than 10 m, add refrigerant oil to the system to ensure normal system operation.
The following lists the amount of refrigerant oil to be added for each 1 m increase
in the length of the pipe connecting the indoor and outdoor units:
●
●
●
The amount of refrigerant to be added refers to the amount of refrigerant that
exceeds the standard amount. Generally, extra refrigerant needs to be added when
the pipe length exceeds the standard length.
Step 10 Fill refrigerant.
When the smart cooling product is shut down, refrigerant can be filled from the
exhaust pipe (high pressure, thin pipe of the compressor). When the smart cooling
Issue 02 (2020-12-25)
NO TICE
unit flows to the engineering pipe and indoor unit pipe. When performing other
operations, be careful to prevent refrigerant from spraying out.
there is positive pressure inside the refrigerant pipe of the indoor unit.
Formula for calculating the amount of refrigerant oil to be added: Amount of
refrigerant oil to be added (ml) = 300 (ml) + Amount of refrigerant to be
added (kg) x 22.6
Time for adding refrigerant oil: after vacuumizing and before filling
refrigerant
Position for adding refrigerant oil: through the gas pipe needle valve of the
indoor unit
NO TE
Refrigerant added to the low ambient kit causes the refrigerant oil in the system to be
diluted, which affects the lubrication and cooling effect of the refrigerant oil. Therefore, you
need to add refrigerant oil. Add 200 ml refrigerant oil for a 5 U rack-mounted smart cooling
product.
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