• Systems • Installation
5
• Installation
Introduction
Procedure and tools for refrigerant piping work
Refrigerant charging
• Charge R-407C from service port at liquid side stop value of outdoor
unit in liquid phase. At that time, conduct vacuum drying using
vacuum pump.
Air-tightness test
•Make sure to conduct air-tightness test.
CAUTION
1Air conditioners should not be installed in areas where corrosive gases, such as acid gas or alkaline gas, are produced.
2 If the outdoor unit is to be installed close to the sea shore, direct exposure to the sea breeze should be avoided and choose an outdoor unit with
anti-corrosion treatment.
Conduct installation work for R-407C models according to above mentioned piping work procedure. Otherwise, the
unit may have trouble. Refer to the "Work execution and control for R-407C model" for the details on handling of
R-407C, installation works and tools.
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