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The following instructions should be followed when installing your new refrigerant air conditioner.
This air conditioner uses environmentally friendly refrigerant (R407C).
1.R407C refrigerant requires a higher system pressure and is more likely to be affected by moisture, oxides and grease.
If polyol ester is used, special care should be taken to avoid contamination from moisture, dust, refrigerant as well
as refrigeration oil in the cooling system.
2.As R407C refrigerant is not an azeotropic compound, its components may change significantly if it is injected in a
gaseous state. It is recommended that the refrigerant be injected in a liquid state.(20% of the refrigerant may remain
in the bottle.)
3.To avoid contamination between refrigerant and refrigeration oil, tools specially designed for R407C and R22
refrigerants should be used.
4.Clean pipes should be used to connect to the piping system. Moisture and foreign bodies must be completely removed.
Pipes provided for R22 system cannot be used.
5.Refrigerant leaks may result in changes to refrigerant property. If leaks occur, the system must be exhausted and
refilled with R407C refrigerant.
6.The cooling system must be completely exhausted to 10Pa or less. Vacuuming can be conducted from the high pressure
and low pressure side of the system.
7.Only parts specified by the manufacturer should be used to replace the compressor and the 4-way and shut-off valves.
List of Necessary Equipment and Requirements
Tools listed in this table should be used for installation. New tools and equipment specified below
should be carefully maintained.
Equipment
Application
Requirement
R407C refrigerant filler New
New
Not applied for new refrigerant
For new refrigerant and R134a
Applicable with anti-backflow device installed
Tools for R22 to be applied
Tools for R22 to be applied
Tools for R22 to be applied
For R407C only
Lipid greases
Tools for R22 to be applied
Tools for R22 to be applied
Tools for R22 to be applied
Tools for R22 to be applied
Refrigerant filling
Detecting refrigerant leaks
Vacuuming and drying
Pipe expanding
Vacuuming and drying
Refrigerant reclaiming
Applied on flared section of pipes
Tightening screws
Cutting pipes
Refrigerant filling
Pipe welding
Refrigerant filling
Filling duct
R22 refrigerant filler
Leak detector
Vacuum pump
Anti-backflow vacuum pump
Expander
Bender
Refrigerant reclaimer
Refrigeration oil (polyol ester)
Spanner
Pipe cutter
Refrigerant bottle
Welder and Nitrogen bottle
Refrigerant electric balance
Pipe bending
Label: On container top with refrigerant name
For vacuuming
and refrigerant filling
: New (for R407 only)
:Original
For R407C only
Safety Precautions
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