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How to put the refrigerant into the refrigerant container before pump down operation
❋ ❋ 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 .
X Prepare the exclusive refrigerant container that can be recharged, scale, and manifold gage that can be recharged .
X
X Check the current amount of refrigerant within the system .
X
X After connecting the refrigerant container to an outdoor unit, operate 50% of all indoor units as cooling mode .
X
X Check the pressure of high pressure side for manifold gage after 10 minutes from cooling operation . When the pressure
X
of high pressure side is above 2 . 9 MPa (gauge pressure), 420 . 6 1 psig decrease the number of operating indoor unit and
make the pressure below 2 . 9 MPa (gauge pressure), 420 . 6 1 psig .
X After checking that the pressure of high pressure side went below 2 . 9 MPa (gauge pressure), 420 . 6 1 psig, open the
X
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 .
X Check whether the proper amount of refrigerant are put into the container using a scale, turn off the valve and remove
X
the manifold gage .
X The amount of refrigerant that can be put into the refrigerant container should be about 50% of all refrigerant of the
X
whole system .
X Do not collect too much refrigerant in one refrigerant container .
X
R410A
Refrigerant
container valve
Scale
Outdoor unit
Liquid side
Gas side
Valve(1)
Valve(2)
Manifold gage
Service valve
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