MITSUBISHI ELECTRIC P500YMF-C User Manual

Page 10

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Cylin-

der

Cylin-

der

Valve

Liquid

[6] Charging of Refrigerant

R407C must be in a liquid state when charging, because it is a non-azeotropic refrigerant.

For a cylinder with a syphon attached

For a cylinder without a syphon attached

Cylinder color identification

R407C-Gray

Charged with liquid refrigerant

R410A-Pink

Reasons :

1. R407C is a mixture of 3 refrigerants, each with a different evaporation temperature. Therefore, if the equipment is

charged with R407C gas, then the refrigerant whose evaporation temperature is closest to the outside temperature is

charged first while the rest of refrigerants remain in the cylinder.

Note :

•

In the case of a cylinder with a syphon, liquid R407C is charged without turning the cylinder up side down. Check the

type of cylinder before charging.

[7] Dryer

1. Replace the dryer when the refrigerant circuit is opened (Ex. Change the compressor, full gas leakage). Be sure to

replace the dryer with a CITY MULTI Series Y (For use with R407C).

If any other product is used, the unit will be damaged.

2. Opening the refrigerant circuit after changing to a new dryer is less than 1 hour. The replacement of the dryer should

be the last operation performed.