4-20
4.4.4 Refrigerant Recovery and Charge
(1) Schematic diagram
Service work
Service port
Remarks
Pressure Check
High pressure
w
q
Refrigerant recovery
and charge (R134a:
4.6Kgf)
[1] Refrigerant
Recovery
t
Recover refrigerant from port t
after operating
Automatic Pump-Down first.
r & t
Recover completely the refrigerant
left in the unit port r & t.
[2] Vacuum &
Dehydration
r & t
After recovering, vacauum from
port r & t.
※
The connection at port r is same
size at q for low pressure.
[3] Liquid charging
t→e
After vacuuming, charge liquid
refrigerant from t first and them
from e.
If not reached to the specified
amount 4.2 kgf, go to next below.
1. Operate Automatic Pump-Down
first and stop it using ON/OFF
switch after the compressor
stops during the Auto pump
down operation.
2. Charge liquid refrigerant from
port e.
Low pressure
e
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