49
ENGLISH
How to put the refrigerant into the refrigerant container before pump down operation
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When the amount of refrigerant charged in the system exceeds maximum receptive capacity, collect the refrigerant into
the refrigerant container at first and then perform the pump down.
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Prepare the exclusive refrigerant container that can be recharged, scale, and manifold gage that can be recharged.
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Check the current amount of refrigerant within the system.
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After connecting the refrigerant container to an outdoor unit, operate 50% of all indoor units as cooling mode.
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Check the pressure of high pressure side for manifold gage after 10 minutes from cooling operation. When the pressure
of high pressure side is above 30kg/cm²,g decrease the number of operating indoor unit and make the pressure below
30kg/cm²,g.
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After checking that the pressure of high pressure side went below 30kg/cm²,g, open the manifold gage side valve(2) that
is connected to the liquid pipe and refrigerant container valve. Then run the refrigerant from liquid pipe to refrigerant
container.
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Check whether the proper amount of refrigerant are put into the container using a scale, turn off the valve and remove
the manifold gage.
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The amount of refrigerant that can be put into the refrigerant container should be about 50% of all refrigerant of the
whole system.
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Do not collect too much refrigerant in one refrigerant container.
Gas side
Scale
Liquid side
Manifold gage
Service valve
Outdoor unit
R-410A
Refrigerant
container valve
Valve(2)
Valve(1)
