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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
X
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
X
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
X After pipe installation, charge the refrigerant according to the length of the pipe and R410A refrigerant should be used .
X
X Use clean refrigerant pipe and there shouldn't be any harmful ion, oxide, dust, iron content or moisture inside pipe .
X
X Use tools and accessories that fit on R410A only .
X
• 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
WARNING
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 .
Tool
Pipe cutter
Flaring tool
Refrigerant oil
Torque wrench
Pст.)ipe bender
Nitrogen gas
Brazing tool
Manifold gauge
Refrigerant charging
hose
Vacuum pump
Scale for refrigerant
charging
Gas leak detector
Flare nut
12
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Work
Pipe cutting
Pipe flaring
Apply refrigerant oil on
Refrigerant pipe work
flared part
Connect flare nut with pipe
Pipe bending
Inhibition of oxidization
Air tightening test
Pipe brazing
Air tightening test ~
Vacuuming, charging and
additional refrigerant
checking operation
charging
Compatible (Use products which contain the check valve to prevent the oil
from flowing backward into the outdoor unit . )
Vacuum drying
Use the one that can be vacuumed up to 100 . 7 kpa(5Torr . - 755mmHg) .
Compatible
Gas leak test
You must use the flare nut equipped with product .
Refrigerant leakage may occur when the conventional flare nut for R22 is used .
If compatible with conventional tool
Compatible
Exclusive ether oil, ester oil, alkali benzene oil or
synthetic oil
Compatible
Need exclusive one to prevent mixture of R22
refrigerant oil use and also the measurement is
not available due to the high pressure .
Need exclusive one due to the refrigerant
leakage or inflow of impurities .
Need exclusive one
( The one for R134A can be used)
2013-03-04 오후 4:28:16
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