Connecting To The System And Removing Air In The Circuit - Samsung AC024JXADCH Installation Manual

Connecting to the system and removing air in the circuit

• When installing, make sure there is no leakage. When recovering the refrigerant, ground the compressor before
removing the connection pipe. If the refrigerant pipe is not properly connected and the compressor operates
CAUTION
with the service valve open, the pipe can inhale air and create abnormally high pressure inside of the refrigerant
system that can cause explosion and injury.
The air in the indoor unit and in the pipe must be purged. If air remains in the refrigeration pipes, it will affect 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 figure.
1. Connect each assembly pipe to the appropriate valve on the outdoor unit and tighten the flare nut.
2. Referring to the illustration opposite, tighten the flare nut on section B first
manually and then with a torque wrench, applying the following torque.
Outer Diameter (D)
ø6.35 mm(1/4")
ø9.52 mm(3/8")
ø12.70 mm(1/2")
ø15.88 mm(5/8")
ø19.05 mm(3/4")
3. Connect the low pressure charging hose of the manifold gauge to the gas
pipe service valve port as shown in the figure.
• Make the electrical connection and leave the system into "stand by
mode". Do not turn on the system.
CAUTION
• This is necessary to speed up vacuum operation (full OPEN
position of Electronic Expansion Valve - EEV -).
4. Open the valve of the low pressure side(A) of manifold gauge
counterclockwise.
Torque (lbf • ft)
10.3 ~ 13.3
25.0 ~ 31.0
36.1 ~ 45.0
50.2 ~ 60.5
73.8 ~ 88.5
Outdoor unit
A (Gas)
B (Liquid)
Vacuum
❋ The designs and shape are subject to
change according to the model.
pump
25