–8–
Cylin-
der
Cylin-
der
Valve
Valve
Liquid
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 three refrigerants, each with a different evaporation temperature. 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 :
•
Do not use cylinders that are equipped with a siphon upside-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).
The use of any other product will damage the unit.
2. Do not leave the refrigerant circuit open for longer than one hour after removing the old drier.