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Refrigerant pipe installation
• 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
WARNING
works with the service valve open, the pipe inhales the air and it makes the pressure inside of the
refrigerant cycle abnormally high which may lead to explosion and injury .
Refrigerant pipe work
f The length of refrigerant pipe should be as short as possible and the height difference between an indoor and
X
outdoor unit should be minimized .
f Piping work must be done within allowable piping length, height difference, and the allowable length after
X
branching .
f The pressure of the R-410A is high . Use only certified refrigerant pipe and follow the installation method .
X
f After installing the pipes, calculate the total length of the pipe to check if additional refrigerant is needed . When
X
you need to charge the additional refrigerant, make sure to use R-410A refrigerant .
f Use clean refrigerant pipe and there shouldn't be any harmful ion, oxide, dust, iron content or moisture inside pipe .
X
f Use tools and accessories that fit on R-410A only .
X
Tool
Installation process/purpose
Pipe cutter
Flaring tool
Refrigerant
Refrigerant pipe
machine oil
installation
Torque wrench
Pipe bender
Nitrogen gas
Air tightness test
Welder
Manifold gage
Air tightness
test ~ additional
refrigerant
Refrigerant
charging hose
Vacuum pump
Scale for
refrigerant
charging
Gas leak detector
Must use the flare nut equipped with the product . Refrigerant leakage may occur when the conventional
Flare nut
36
DVM S HE_IM_DB68-05461A-08_EN.indd 36
Pipe cutting
Pipe flaring
Apply refrigerant
oil on flared part
Connect flare nut
with pipe
Pipe bending
Prevent oxidation
within the pipe
Pipe welding
Vacuuming,
charging
refrigerant
and checking
charging
operation
Pipe drying
Refrigerant charging
Gas leak test
Compatibility with conventional tool
Compatible
Exclusive ether oil, ester oil, alkali benzene oil or synthetic oil
Compatible
Need exclusive one to prevent mixture of R-22 refrigerant oil use
and also the measurement is not available due to high pressure
Need exclusive one since there is risk of refrigerant leakage or
inflow of impurities
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) .
Compatible
Need exclusive one
(Ones used for R-134a is compatible)
flare nut for R-22 is used .
2017-03-24 오후 1:38:20
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