4
4 INSTALLATION TOOLS reqUIreD
4.1 New refrigerant Air Conditioner Installation
● This air conditioner adopts the new HFC refrigerant (R410A) which doesn't 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 of refrigerant R22. Accompanied with the adoption of
the new refrigerant, the refrigeration machine oil has also been changed. Therefore, during installation work, be
sure that water, dust, former refrigerant, or refrigeration machine oil does not enter into the new type refrigerant
R410A air conditioner circuit.
● To prevent mixing of refrigerant of refrigerating machine oil, the sizes of connecting sections of charging port on
main unit and installation tools are different from those used for the conventional refrigerant units. Accordingly,
special tools are requited 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 dust does not enter. Moreover, do
not use the existing piping because there are some problems with pressure fittings and possible impurities in
existing piping.
4.2 Changes in the product and components
● In air conditioners using R410A, in order to prevent any other refrigerant from being accidentally charged, the
service port diameter size of the outdoor unit control valve (3 way valve) has been changed.
● In order to increase the pressure resisting strength of the refrigerant piping, flare processing diameter and
opposing flare nuts sizes have been changed.
New tools for R410A
Applicable to R410A
New tools for R410A
Applicable to R410A
Gauge manifold
Flare tool (clutch type)
Charge hose
Vacuum pump adapter
Electronic balance for
Refrigerant charging
Gas leakage detector
Torque wrench
● Incidentally, the “refrigerant cylinder” comes with the refrigerant designation (R410A) and protector coating in
the U.S's ARI specified rose color (ARI color code: PMS 507).
● The charge port size of refrigerant cylinder should be as same a the charge hose's port size.
Table 1
