Samsung AJ040MCJ2EH Installation Manual - Installation Procedure
18
Installation Procedure
English
Instal
lation Pr
oc
edur
e
5
Check that the flaring is correct, referring to the
illustrations below for examples of incorrect flaring.
3
2
1
Correct
Inclined
Damaged
Surface
Cracked
Uneven
Thickness
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 8 Connecting up and removing air
in the circuit
WARNING
•
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 outdoor unit is loaded with sufficient R-410A
refrigerant.Do not vent R-410A into atmosphere: it is a
fluorinated greenhouse gas, covered by Kyoto Protocol,
with a Global Warming Potential (GWP) = 2088.
You should purge the air in the indoor unit and in the
pipe. If air remains in the refrigerant pipes, it affects the
compressor. It may cause reduction of cooling capacity
and malfunction. Refrigerant for air purging is not
charged in the outdoor unit. Use Vacuum Pump as seen
in the picture.
1
Check the piping connections.
2
Connect the charging hose of low pressure side of
manifold gauge to the packed valve having a service
port .
Model Name
Valve
3/8''
1/2''
AJ040MCJ2EH
2
-
AJ050MCJ2EH
1
1
AJ052MCJ3EH
2
1
AJ068MCJ3EH
1
2
AJ070MCJ4EH
AJ080MCJ4EH
2
2
CAUTION
•
Make the electrical connection and leave the system
into “stand by mode”. Do not turn on the system! This
is necessary for better vacuum operation (full OPEN
position of Electronic Expansion Valve - EEV -).
Vacuum
Pump
Valve stem
INDOOR A UNIT
INDOOR B UNIT
Stem cap
Service port
AJ040/050MCJ2EH, AJ052MCJ3EH