Installing The Unit; Refrigerant Piping Works; Selecting The Refrigerant Pipe - Samsung RD080HRXGB Installation Manual

installing the unit

REFRIGERANT PIPING WORKS

When installing, make sure there is no leakage. When recovering the refrigerant, ground the
compressor first before removing the connection pipe.
WARNING
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 piping length between the outdoor unit and the indoor unit may not exceed the allowable piping
length.
• The pressure of the R410A is high.
Use only certified refrigerant pipe and follow the installation method.
• Use clean refrigerant pipe which there is no harmful ion, oxide, dust, iron content or moisture inside pipe.
• Use tools and accessories fit on R410A.
Tool
Pipe cutter
Flaring tool
Refrigerant oil
Torque wrench
Pipe bender
Nitrogen gas
Brazing tool
Gauge manifold
Refrigerant charging hose
Vacuum pump
Electronic scale
Gas leak detector
Flare joint

Selecting the refrigerant pipe

• When the equivalent pipe length from outdoor unit to the farthest indoor unit is over 90m,
the main pipe (both liquid and gas pipe) has to be increased with 1 size like below table.
Main pipe First branch
joint
 Main pipe : from outdoor unit to the first branch joint.
Work
Refrigerant pipe work
Air tightening test
Air tightening test ~ additional
refrigerant charging
Vacuuming unit
Use indoor unit's only
Equivalent pipe length between outdoor
unit and the farthest indoor unit
If compatible with conventional tool
Pipe cutting
Pipe flaring
Apply refrigerant oil on flared
part
Connect flare joint with pipe
Pipe bending
Inhibition of oxidization
Pipe brazing
Vacuuming, charging and
checking operation
Gas leak test
The pipe length between outdoor
and the farthest indoor unit
Below 90m 90m and over
ø9.52
ø12.70
ø15.88
ø19.05
ø22.23
ø25.40
ø28.58
ø31.75
ø38.10
ø44.45
Compatible
Ester series oil, alkali
benzene oil or synthetic oil
Compatible
Exclusive
Use one which has a check
valve and 5 torr degree of
vacuum.
Compatible
Exclusive
ø12.70
ø15.88
ø19.05
ø22.23
ø25.40
ø28.58
ø31.75
ø38.10
ø44.45
ø50.80
installing the unit _15