16
Connecting up and removing air in the circuit
The air in the indoor unit and in the pipe must be purged. If air remains in the refrigeration pipes, it will aect the
compressor either reduce cooling/heating capacity or lead to a malfuction. Refrigerant for air purging is not charged in the
outdoor unit. Use Vacuum Pump as shown at the right gure.
1. Connect each assembly pipe to the appropriate valve on the outdoor unit and tighten the are nut.
2. Referring to the illustration opposite, tighten the are nut on section B rst
manually and then with a torque wrench, applying the following torque.
3. Connect the charging hose of low pressure side of manifold gauge to the
packed valve having a service port as shown at the gure.
4. Open the valve of the low pressure side of manifold gauge counterclockwise.
• Make the electrical connection and leave the system into “stand by
mode”. Do not turn on the system.
This is necessary to speed up vacuum operation (full OPEN position of
Electronic Expansion Valve - EEV -).
Outer Diameter (D) Torque (N•m)
ø6.35 mm(1/4") 18
ø9.52 mm(3/8") 42
ø12.70 mm(1/2") 55
ø15.88 mm(5/8") 65
ø19.05 mm(3/4") 100
A
B
C
D
Outdoor unit
Vacuum
pump
The designs and shape are subject to
change according to the model.
• When installing, make sure there is no leakage. When recovering the refrigerant, ground the compressor rst
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.
RC＊＊＊DHXEA_IM_E_32793A(5).indd 16 2011-03-09 오후 9:32:35
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