Samsung AC BXAP G Series - Step 9: Connecting and Removing Air from the Circuit

22
English
Installation Procedure
Installation Procedure
Step 9 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.
• Use manifold gauge and vacuum pump as shown at the
right figure.
• Make sure that both manifold gauge and vacuum pump
are compatible with R-32.
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.
Outdoor Unit
A (Gas)
B (Liquid)
D
C
Outer Diameter (mm) Torque (N·m)
ø6.35 14 to 18
ø9.52 34 to 42
ø12.70 49 to 61
ø15.88 68 to 82
ø19.05 100 to 120
3 Connect the charging hose of low pressure side of
manifold gauge to the packed valve having a service port
as shown at the figure.
CAUTION
• The designs and shape are subject to change according to
the model.
4 Open the valve of the low pressure side(A) of manifold
gauge anticlockwise.
A(Gas)
B(liquid)
Outdoor Unit
Vacuum
Pump
5 Purge the air from the system using vacuum pump for
about 10 minutes.
• Close the valve of the low pressure side of manifold
gauge clockwise.
• Make sure that pressure gauge shows -0.1 MPa (-76
cmHg) after about 10 minutes. This procedure is
very important to avoid a gas leak.
• Turn off the vacuum pump.
• Remove the hose of the low pressure side of
manifold gauge.
6 Open the stop valve of both liquid and gas sides.
7 Mount the valve stem nuts and the service port cap to the
valve, and tighten them at the torque of
18 N·m with a torque wrench.
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