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Refrigerant pipe installation
Refrigerant pipe work
X The length of refrigerant pipe should be as short as possible and the height difference between an indoor unit and
outdoor unit should be minimized.
X The piping length between the outdoor unit and the indoor unit may not exceed the allowable piping length, height
difference, and the allowable length after branching is done.
X The pressure of the R410A is high. Use only certified refrigerant pipe and follow the installation method.
X After pipe installation, charge the refrigerant according to the length of the pipe and R410A refrigerant should be used.
X Use clean refrigerant pipe and there shouldn’t be any harmful ion, oxide, dust, iron content or moisture inside pipe.
X Use tools and accessories that fit on R410A only.
• When installing, make sure there is no leakage. When collecting the refrigerant, stop 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.
WARNING
Tool Work If compatible with conventional tool
Pipe cutter
Refrigerant pipe work
Pipe cutting
Compatible
Flaring tool Pipe flaring
Refrigerant oil
Apply refrigerant oil on
flared part
Exclusive ether oil, ester oil, alkali benzene oil or
synthetic oil
Torque wrench Connect flare nut with pipe
Compatible
Pст.)ipe bender Pipe bending
Nitrogen gas
Air tightening test
Inhibition of oxidization
Brazing tool Pipe brazing
Manifold gauge
Air tightening test ~
additional refrigerant
charging
Vacuuming, charging and
checking operation
Need exclusive one to prevent mixture of R22
refrigerant oil use and also the measurement is
not available due to the high pressure.
Refrigerant charging
hose
Need exclusive one due to the refrigerant
leakage or inflow of impurities.
Vacuum pump Vacuum drying
Compatible (Use products which contain the check valve to prevent the oil
from flowing backward into the outdoor unit.)
Use the one that can be vacuumed up to 100.7kpa(5Torr.-755mmHg).
Scale for refrigerant
charging
Compatible
Gas leak detector Gas leak test
Need exclusive one
( The one for R134A can be used)
Flare nut
You must use the flare nut equipped with product.
Refrigerant leakage may occur when the conventional flare nut for R22 is used.
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