Samsung Electronics 89
3. Disassembly and Reassembly
3-1 Necessary Tools
Refrigerant pipe installation
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.
Tool Installation process/purpose Compatibility with conventional tool
Pipe cutter
Refrigerant pipe
installation
Pipe cutting
Compatible
Flaring tool Pipe flaring
Refrigerant machine oil
Apply refrigerant
oil on flared part
Exclusive ether oil, ester oil, alkali benzene oil or synthetic oil
Torque wrench
Connect flare nut
with pipe
Compatible
Pipe bender Pipe bending
Nitrogen gas
Air tightness test
Prevent oxidation
within the pipe
Welder Pipe welding
Manifold gage
Air tightness test ~
additional
refrigerant charging
Vacuuming,
charging
refrigerant
and checking
operation
Need exclusive one to prevent mixture of R-22 refrigerant oil use
and also the measurement is not available due to high pressure
Refrigerant charging
hose
Need exclusive one since there is risk of refrigerant leakage or
inflow of impurities
Vacuum pump Pipe drying
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).
Scale for refrigerant
charging
Refrigerant charging Compatible
Gas leak detector Gas leak test Need exclusive one. (Ones used for R-134a is compatible)
Flare nut
Must use the flare nut equipped with the product.
Refrigerant leakage may occur when the conventional flare nut for R-22 is used.
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.
∙ Install the refrigerant pipe according to main pipe size of each outdoor unit capacity.
∙ When the pipe length (including elbow) between an outdoor unit and the farthest indoor unit exceeds 90m, you must increase
the size of the pope (main pipe) by one grade which connects betwen the outdoor unit to the first branch joint.
∙ For H/R model, When the pipe length (including elbow) between an outdoor unit and the farthest indoor unit exceeds 90m, you
must increase the size of the liquid pipe by one grade among the pipes(main pipe) which connects between the outdoor unit to
the first branch joint.
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