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A5LCY-E-2010 Application Information
Special Precautions when Dealing with R410A Unit
R410A is a new HFC refrigerant which does not damage the ozone layer. The working pressure of this
new refrigerant is 1.6 times higher than conventional refrigerant (R22), thus proper installation / servicing is
essential.
Never use refrigerant other than R410A in an air conditioner which designed to operate with R410A.
POE oil is used as lubricant for R410A compressor, which is different from the mineral oil used for R22
compressor.During installation or servicing, extra precaution must be taken not to expose the R410A
system too long to moist air. Residual POE oil in the piping and components can absorb moisture from the
air.
To prevent mischarging, the diameter of the service port on the fl are valve is different from that of R22.
Use tools and materials exclusively for refrigerant R410A. Tools exclusively for R410A are manifold valve,
charging hose, pressure gauge, gas leak detector, fl are tools, torque wrench, vacuum pump and refrigerant
cylinder.
As an R410A air conditioner incurs higher pressure than R22 units, it is essential to choose the copper
pipes correctly. Never use copper pipes thinner than 0.8mm even though they are available in the market.
If the refrigerant gas leakage occurs during installation / servicing, be sure to ventilate fully. If the
refrigerant gas comes into contact with fi re, a poisonous gas may occur.
When installing or removing an air conditioner, do not allow air or moisture to remain in the refrigerant
cycle.
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