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ENGLISH
Refrigerant pipe installation
࡛
When installing, make sure there is no leakage. When collecting the refrigerant, stop the
ʀͱ͔Χθʪϑϑͱθѣθϑϩɵʪ˙ͱθʪθʪ͔ͱӬ͝˝ϩ˵ʪʀͱ͝͝ʪʀϩ̈ͱ͝Χ̈ΧʪÃ˙ϩ˵ʪθʪ˙θ̈˝ʪθɇ͝ϩΧ̈Χʪ̈ϑ͝ͱϩΧθͱΧʪθ̷ц
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.
WARNING
Refrigerant pipe work
ॷ
The length of refrigerant pipe should be as short as possible and the height difference between an indoor
and outdoor unit should be minimized.
ॷ
Piping work must be done within allowable piping length, height difference, and the allowable length after
branching.
ॷ Ɵ˵ʪΧθʪϑϑЇθʪͱ˙ϩ˵ʪŵࣛߦߣߢ̈ϑ˵̈˝˵Ƹϑʪͱ̷͝цʀʪθϩ̈ѣʪʒθʪ˙θ̈˝ʪθɇ͝ϩΧ̈Χʪɇ͝ʒ˙ͱ̷̷ͱиϩ˵ʪ̈͝ϑϩɇ̷̷ɇϩ̈ͱ͔͝ʪϩ˵ͱʒ
ॷ
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.
ॷ
Use clean refrigerant pipe and there shouldn’t be any harmful ion, oxide, dust, iron content or moisture
inside pipe.
ॷ Ƹϑʪϩͱͱ̷ϑɇ͝ʒɇʀʀʪϑϑͱθ̈ʪϑϩ˵ɇϩѣϩͱ͝ŵࣛߦߣߢͱ̷͝ц
Tool
Installation process/purpose
Compatibility with conventional tool
Pipe cutter
Refrigerant pipe
installation
Pipe cutting
Compatible
Flaring tool
ť̈ΧʪѤɇθ̈͝˝
Refrigerant
machine oil
Apply
refrigerant oil
ͱ͝ѤɇθʪʒΧɇθϩ
Exclusive ether oil, ester oil, alkali benzene oil or synthetic
oil
Torque wrench
Aͱ͝͝ʪʀϩѤɇθʪ
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
ϩʪϑϩड़ɇʒʒ̈ϩ̈ͱ͝ɇ̷
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
ͱθ̈͝Ѥͱиͱ˙͔̈ΧЇθ̈ϩ̈ʪϑ
Vacuum pump
Pipe drying
Compatible (Use products which contain the check valve to
ΧθʪЭʪ͝ϩϩ˵ʪͱ̷̈˙θͱ͔Ѥͱӥ͝˝ɵɇʀ̧иɇθʒ̈͝ϩͱϩ˵ʪͱЇϩʒͱͱθЇ̈͝ϩ࣒
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
đЇϑϩЇϑʪϩ˵ʪѤɇθʪ͝ЇϩʪαЇ̈ΧΧʪʒӥϩ˵ϩ˵ʪΧθͱʒЇʀϩŵʪ˙θ̈˝ʪθɇ͝ϩ̷ʪɇ̧ɇ˝ʪ͔ɇцͱʀʀЇθи˵ʪ͝ϩ˵ʪ
ʀͱ͝Эʪ͝ϩ̈ͱ͝ɇ̷Ѥɇθʪ͝Їϩ˙ͱθŵࣛߤߤ̈ϑЇϑʪʒ
