Refrigerant Pipe Installation - Samsung RD MHXE Series Installation Manual

Refrigerant pipe installation

Refrigerant pipe work
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.
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.
The pressure of the R-410A is high. Use only certified refrigerant pipe and follow the installation method.
After pipe installation, charge the refrigerant according to the length of the pipe and R-410A refrigerant should be used.
Use clean refrigerant pipe and there shouldn't be any harmful ion, oxide, dust, iron content or moisture inside pipe.
Use tools and accessories that fit on R-410A 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
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
Pipe bender
Nitrogen gas
Brazing tool
Manifold gauge
Refrigerant charging
hose
Vacuum pump
Scale for refrigerant
charging
Gas leak detector
Flare nut
12
Work
Apply refrigerant oil on
Refrigerant pipe work
Inhibition of oxidization
Air tightening test
Air tightening test ~
Vacuuming, charging and
additional refrigerant
charging
Vacuum drying
Charging refrigerant
Gas leak test
You must use the flare nut equipped with product.
Refrigerant leakage may occur when the conventional flare nut for R-22 is used.
Pipe cutting
Pipe flaring
flared part
Connect flare nut with
pipe
Pipe bending
Pipe brazing
checking operation
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 R-22
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.
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).
Compatible
Need exclusive one
( The one for R-134a can be used)