Refrigerant pipe size and allowable pipe length
Danger
Piping an other pressure containing parts
shall comply with the applicable legislation and shall be suitable for refrigerant. Use phosphoric acide
deoxidised seamless copper for refrigerant.
Installation shall be done by an installer, the choice of materials and installation shall comply with
applicable legislation.
Information
It is forbidden to discharge refrigerant into the atmosphere. Collect the refrigerant in accordance with the
freon collection and destruction law.
Notice
To persons in charge of piping work:
Be sure to open the stop valve after piping installing and vacuuming is complete. (Running the system with the
valve closed may break the compressor.)
Notice
Do not use flux when brazing the refrigerant piping.
For brazing, use phosphor copper brazing filler metal (BCuP) which does not require a flux.
(If a chlorine flux is used, the piping will corrode, and if the flux contains fluoride, if will cause the coolant oi to
deteriorate, adversely affecting the coolant piping system.)
Necessary Tools and Materials
Prepare the following tools and materials necessary for installing and servicing the unit . Necessary tools for use
with R410A(Adaptability of tools that are for use with R22 and R407C) .
1 . To be used exclusively with R410A ( Not to be used if used with R22 or R407C )
Tools/Materials Use Notes
Gauge Manifold
Evacuating,refrigerant
charging
5.09MPa on the High-pressure side.
Charging Hose
Evacuating, refrigerant
charging Refrigerant recovery
Hose diameter larger than the
concentional ones.
Refrigerant Recovery
Refrigerant recovery
Refrigerant Cylinder Refrigerant charging
Write down the refrigerant type. Pink
in color at the top of the cylinder.
Refrigerant Cylinder
Charging Port
Refrigerant charging
Hose diameter larger than the
conventional ones.
Flare Nut Connecting the unit to piping Use Type-2 Flare nuts.
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