Step 7 Connecting Up And Removing Air In The Circuit - Samsung AC MXADKH Series Installation Manual

1
2
Correct Inclined Damaged
Surface
CAUTION
• If the pipes require brazing ensure that OFN(Oxygen
Free Nitrogen) is flowing through the system.
• Nitrogen blowing pressure range is 0.02 to 0.05 MPa.
Step 7 Connecting up and removing air
in the circuit
CAUTION
• When installing, make sure there is no leakage. When
recovering the refrigerant, ground the compressor
first before removing the connection pipe. If the
refrigerant pipe is not properly connected and the
compressor works with the service valve open, the
pipe inhales the air and it makes the pressure inside
of the refrigerant cycle abnormally high. It may cause
explosion and injury.
The air in the indoor unit and in the pipe must be
evacuated. If air remains in the refrigerant pipes, it will
affect the compressor either reduce cooling/heating
capacity or lead to a malfunction. Refrigerant for air
purging is not charged in the outdoor unit. Use Vacuum
Pump as shown at the right figure.
1 Connect each assembly pipe to the appropriate valve
on the outdoor unit and tighten the flare nut.
2 Referring to the illustration below, tighten the flare
nut on section D first manually and then with a
torque wrench, applying the following torque.
3
Cracked Uneven
Thickness
3 Connect the charging hose of low pressure side of
• The designs and shape are subject to change
4 Open the valve of the low pressure side(A) of
Outdoor Unit
B(Liquid)
A(Gas)
C
manifold gauge to the packed valve having a service
port as shown at the figure.
CAUTION
according to the model.
manifold gauge anticlockwise.
D
Vacuum
Pump
A(Gas)
B(liquid)
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