LG ATNW18GTLP1 Engineering Product Data Book page 138

Installation of Indoor Unit
1. Information for Refrigerant
1.1 R410A as an Alternative Refrigerant
The type of refrigerant applied depends on the outdoor unit cycle configuration. Ensure the refrigerant type
in the specification of the indoor unit and outdoor unit to be installed.
■ Alternative Refrigerant _ R410A
• The refrigerant R410A has the property of higher operating pressure in comparison with R22.
Therefore, all materials have the characteristics of higher resisting pressure than ones of R22 and this characteristic should
also be considered during the installation.
• The wall thickness of the piping should comply with the relevant local and national regulations for the designed pressure.
(R410A 3.8MPa)
• For high-pressure refrigerant, any unapproved pipe must not be used.
• Do not heat pipes more than necessary to prevent them from softening.
• Do not place the refrigerant container under the direct rays of the sun to prevent it from exploding.
• R410A is an azeotrope of R32 and R125 mixed at 50:50, so the ozone depletion potential(ODP) of R410A is 0.
• Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid state.
If the refrigerant is charged in its gaseous state, its composition changes and the system will not work properly.
• Be careful not to install wrongly to minimize economic loss because it is expensive in comparison with R22.
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Installation