Disassembly And Reassembly; Necessary Tools - Samsung AM072BXV Series Service Manual

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
Pipe cutter
Flaring tool
Refrigerant machine oil
Torque wrench
Pipe bender
Nitrogen gas
Air tightness test
Welder
Air tightness test
Manifold gage
Refrigerant charging hose
Vacuum pump
Scale for refrigerant
charging
Gas leak detector
Flare nut
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.
Samsung Electronics
Installation process/purpose
Pipe cutting
Pipe flaring
Refrigerant pipe Apply refrigerant oil
installation on flared part
Connect flare nut with pipe
Pipe bending
Prevent oxidation within
the pipe
Pipe welding
Vacuuming, charging
~ additional
refrigerant and checking
refrigerant
operation
charging
Pipe drying
Refrigerant charging
Gas leak test
Refrigerant leakage may occur when the conventional flare nut for R-22 is used.
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)
Must use the flare nut equipped with the product.
Compatibility with conventional tool
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