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Tubing precautions
Refrigerant R410A is more easily affected by dust or moisture compared to R22, thus be sure to temporarily cover the
ends of the tubing with caps or tape prior to installation.
Never use 0.7mm-thick copper tubing or tubing which is less than 0.8mm in thickness, since air conditioners with
R410A are subject to higher pressure than those using R22 and R407C.
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No addition of compressor oil for R410A
No additional charge of compressor oil is required.
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No use of refrigerant other than R410A
Never use a refrigerant other than R410A.
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If refrigerant R410A is exposed to fire
Through welding, etc., toxic gas may be released when R410A refrigerant is exposed to fire. Therefore, be sure to
provide ample ventilation during installation work.
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Caution in case of R410A leak
Check for possible leak points with the special leak detector for R410A. If a leak occurs inside the room, immediately
provide thorough ventilation.
Outer diameter: mm (inch) Tubing wall thickness: mm (inch)
Narrow tube ø6.35 (1/4") 0.8 (0.032)
Wide tube ø19.05 (3/4") 1.0 (0.042)