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Charging the Circuit with Refrigerant
R407C must be in a liquid state when charging the circuit because it is a non-azeotropic refrigerant.
<Rationale>
1. R407C is a mixture of three refrigerants, each with a different evaporation temperature. If the equipment is
charged with R407C gas, only the refrigerant that evaporates most easily is charged, while the rest of the
refrigerants remain in the cylinder.
<Caution>
Do not use cylinders with a siphon upside-down.
When using a cylinder with a siphon, R407C is charged in a liquid state without the cylinder being turned upside-
down. Check the label on the cylinder for information about the type of cylinder before the operation. (Cylinders
with siphons manufactured by Asahi Glass are shown on Page 18)
cylinder with a siphon
Cylinder color R407C-Brown
Cylinder
Cylinder
cylinder without a siphon
Use liquid refrigerant
Valve
Valve
Liquid
Liquid