Samsung Max Heat DVM S2 Technical Data Book page 55

10. Installation
Refrigerant pipe installation
WARNING
• 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 which may lead to explosion and injury.
Refrigerant pipe work
• The length of refrigerant pipe should be as short as possible and the height difference between an indoor and
outdoor unit should be minimized.
• Piping work must be done within allowable piping length, height difference, and the allowable length after
branching.
• The pressure of the R-410A is high. Use only certified refrigerant pipe and follow the installation method.
• After installing the pipes, calculate the total length of the pipe to check if additional refrigerant is needed.
When you need to charge the additional refrigerant, make sure to use R-410A refrigerant.
• 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.
Installation process/
Tool
purpose
Pipe cutter Pipe cutting
Flaring tool Pipe flaring
Apply
Refrigerant refrigerant
machine oil Refrigerant oil on flared
pipe part
installation
Connect
Torque
flare nut
wrench
with pipe
Pipe
Pipe bender
bending
Prevent
Nitrogen oxidation
Air
gas within the
tightness
pipe
test
Pipe
Welder
welding
Manifold
Air Vacuuming,
gage
tightness charging
test ~ refrigerant
Refrigerant
additional and
charging
refrigerant checking
hose
charging operation
Vacuum
Pipe drying
pump
Scale for
refrigerant Refrigerant charging
charging
Gas leak
Gas leak test
detector
Flare nut
Must use the flare nut equipped with the product.
Compatibility with
conventional tool
Compatible
Exclusive ether oil, ester oil,
alkali benzene oil or synthetic
oil
Compatible
Compatible
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)