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Damaged
Correct
Inclined
Surface
CAUTION
• Keep the piping length at a minimum to minimize the
additional refrigerant charge due to piping extension.
• When connecting the pipes, make sure that
surrounding objects do not interfere with or contact
them to prevent refrigerant leakage due to physical
damage.
• Make sure that the spaces where the refrigerant pipes
are installed comply with national gas regulations.
• Be sure to perform works such as additional
refrigerant charging and pipe welding under the
conditions of good ventilation.
• Be sure to perform welding and piping works for
mechanical connections under the conditions that the
refrigerant does not circulate.
• When reconnecting the pipes, make sure to perform
flared-jointing newly to prevent refrigerant leakage.
• When working on the refrigerant pipes and the flexible
refrigerant connectors, be careful that they are not
damaged physically by surrounding objects.
• For installation with handling the R-32 refrigerant,
use the special tools for the R32 refrigerant (manifold
gauge, vacuum pump, charging hose, etc.).
• During tests never pressurize the appliances with
a pressure higher than the maximum allowable
pressure(as indicated on the nameplate of the unit).
• Never directly touch any accidental leaking refrigerant.
This could result in severe wounds caused by frostbite.
• Never install a dryer to this unit in order to guarantee
its lifetime.
• If the pipes require brazing ensure that OFN(Oxygen
3
Uneven
Cracked
Thickness
Free Nitrogen) is flowing through the system.
• Nitrogen blowing pressure range is 0.02 to 0.05 MPa.
• If you need a pipe longer than specified in piping codes
and standards, you must add refrigerant to the pipe.
Otherwise, the indoor unit may freeze.
• While removing burrs, put the pipe face down to make
sure that the burrs do not get in to the pipe.
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-32 refrigerant.
Do not vent R-32 into atmosphere: it is a fluorinated
greenhouse gas, covered by Kyoto Protocol, with a Global
Warming Potential (GWP) = 675.
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
AJ052RCJ3EG
AJ068RCJ3EG
AJ080RCJ4EG
• If the valve diameter of indoor and outdoor unit are
different, please use Tube-connector.
Valve
3/8''
1/2''
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English
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