Amcor AOM 183HX - Manual (Page 16)

INSTALLATION/SERVICE TOOLS(QNLY
FOR R410A PRODUCT)
CAUTION
New Refrigerant Air Conditioner Installation
This air conditioner adopts the new MFC refrigerant (R41OA) which does not destroy ozone layer.
R41 OA refrigerant is approx . 1.6 times of refigerant 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 R41 OA air conditioner circuit.The system
must not be left open to the atmosphere for any reason for any period of time as the systems oil
quickly absorbs moisture and will contaminate and damage the system.
A refrigerant liquid line drier is recommended.
To prevent mixing of refrigerant or refrigerating machine oil ,the sizes of connoting sections of
charging port on main unit and installation tools are different from those used for the conventional
refrigerant units. Accordingly,special tools are required forthe new refrigerant (R410A) units.
For connecting pipes use new and clean piping materials with high pressure fitting made for
R41 OA only, so that water and/or dust does not enter. Moreover, do not use the existing piping
becausetherearesomeproblemswithpresure fittings and possible impurities in existing
piping .
Changes in the product and components
In air conditioners using R41 OA ,in order to prevent any other refrigerant from being accedentally
charged .the service port diameter size of the outdoor unit control valve (3 way valve ) has been
changed. (1/2 UFN 20 threads per inch)
• In order to increase the pressure resisting strength of the refrigerant piping ,flare processing
diameter and opposing flare nuts sizes have been changed.! fot copper pipes with nomensions
1/2 and 5/8)