– 7 –
New refrigerant air to air heat exchanger with DX Coil Unit
installation
• This Air to Air Heat Exchanger with DX Coil Unit adopts the new HFC
refrigerant (R410A) which does not destroy ozone layer.
• The characteristics of R410A refrigerant are; easy to absorb water,
oxidizing membrane or oil, and its pressure is approx. 1.6 times
higher than that of refrigerant R22. Accompanied with the new
refrigerant, refrigerating oil has also been changed. Therefore, during
installation work, be sure that water, dust, former refrigerant, or
refrigerating oil does not enter the refrigerating cycle.
• To prevent charging an incorrect refrigerant and refrigerating oil, the
sizes of connecting sections of charging port of the main unit and
installation tools are changed from those for the conventional
refrigerant.
• Accordingly the exclusive tools are required for the new refrigerant
(R410A).
• For connecting pipes, use new and clean piping designed for R410A,
and please care so that water or dust does not enter.
(*1) Refer to the “Definition of Qualified Installer or Qualified Service Person.”
CAUTION
13-EN
14-EN
+00EH99887601-2_01EN.book Page 7 Thursday, September 15, 2016 5:23 PM
