Refrigerant Charging; Remedies To Be Taken In Case Of A Refrigerant Leak - Mitsubishi Electric CAHV-R450YA-HPB Service Manual

[ I Read Before Servicing ]

[6] Refrigerant Charging

Cylinder with a siphon
Cylin-
der
Cylinder color R454C is White.
Charge refrigerant through the
check joint on the high-pressure side.
1. Reasons
R454C is a mixture of 2 refrigerants, each with a different evaporation temperature. Therefore, if the equipment is charged
with R454C gas, then the refrigerant whose evaporation temperature is closest to the outside temperature is charged frist
while the rest of refrigerants remain in the cylinder.
2. Notes
When using a cylinder with a siphon, refrigerant is charged in the liquid state without the need for turning it upside down. Check
the type of the cylinder on the label before use.

[7] Remedies to be taken in case of a Refrigerant Leak

If the refrigerant leaks out, all of the remaining refrigerant must be replaced with a new charge to maintain the proper composition
of the refrigerant. Repair the leak, and then charge the system with the specified amount of refrigerant (9.0 kg). (Charge refrigerant
in the liquid state.)
Refer to "X [4] Refrigerant Leak."(page 158)
HWE22020
Valve
liquid
- 9 -
Cylinder without a siphon
Cylin-
der
Refrigerant charging in the liquid state
Valve
liquid
Charging refrigerant through the
check joint on the low-pressure side
will create reverse pressure,
resulting in compressor malfunctions.
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