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57-EN
2
Accessory parts
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Installation Manual
1
This manual
Hand this directly to the customer.
(For other languages that do not appear in this Installation Manual,
please refer to the enclosed CD-R.)
CD-ROM
1
—
Installation Manual
Drain nipple
1
Waterproof rubber cap
5
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Guard material for passage
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Installation of new refrigerant air
conditioner
CAUTION
New refrigerant air conditioner installation
This air conditioner adopts the new HFC refrigerant (R410A) which does not destroy ozone layer.
R410A refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because the working
pressure of R410A refrigerant is approx. 1.6 times as that of refrigerant R22. Accompanied with the adoption of the new
refrigerant, the refrigerant oil has also been changed. Therefore, during installation work, be sure that water, dust,
former refrigerant, or refrigerant oil does not enter the new type refrigerant R410A air conditioner cycle.
To prevent mixing of refrigerant or refrigerant oil, the sizes of connecting sections of charging port on main unit and
installation tools are different from those of the conventional refrigerant units. Accordingly, special tools are required for
the new refrigerant (R410A) units. For connecting pipes, use new and clean piping materials with high pressure fittings
made for R410A only, so that water and/or dust does not enter.
Required tools / equipment and precautions for use
Prepare the tools and equipment listed in the following table before starting the installation work.
Newly prepared tools and equipment must be used exclusively.
Legend
: Prepared newly (Use for R410A only. Do not use for refrigerant R22 or R407C etc..)
: Conventional tools / equipment are available
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Gauge manifold
Vacuuming / charging
refrigerant and operation check
Prepared newly for R410A only
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Charging cylinder
Can not be used
Unusable (Use the refrigerant charging measure instead.)
Gas leak detector
Gas leak check
Prepared newly
Vacuum pump
Vacuum drying
Unusable
Vacuum pump with backflow
prevention function
Vacuum drying
R22 (Conventional tools)
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Refrigerant recovery equipment Refrigerant recovery
For R410A only
Torque wrench
Tightening flare nuts
Exclusive for Ø12.7 mm and Ø15.9 mm
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R22 (Conventional tools)
Welding machine and nitrogen
cylinder
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Refrigerant charging measure
Charging refrigerant
R22 (Conventional tools)
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