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IX. TOOLS FOR REPAIRING REFRIGERATING UNIT HFC-134a
Caution:
a.
Conventional repairing devices for CFC-12 can not connect with repairing devices for HFC-134A.
Because the shape of fitting for HFC-134A (M10 x P1.5 mm) is different from conventional ones.
b.
Be sure connect the adaptor with vacuum pump, so it that the vacuum pump can be used for both CFC-
12 and HFC-134a.
1.
Since the inside of manifold gauge and charge hoses are vacuum state after vacuum pumping, the oil of
vacuum pumping may flow into HFC-134a refrigerant unit.The adaptor prevents the oil from flowing
into the refrigerating unit.
2.
Before running the vacuum pump, connect the charge pipe (yellow) with the fitting for HFC-1354a use,
and then turn the switch to HFC-134a use.
3.
When the fitting for CFC-12 use is connected with the charge pipe (yellow), and then turn the switch to
CFC-12 use, the adaptor can be used for vacuum pumping of CFC-12 refrigeratirng unit.
Coupler Plug ( High Pressure Side ) 4mm
Coupler Plug ( Low Pressure Side ) 6.33 / 8mm
Process-Tube-Fitting
( 6.35 mm )
Process-Tube-Fitting
( 4 mm )
Charge Adaptor
Coupler Socket
Charge Cylinder
Charge Hose
Control Valve
Blue
Yellow
Adaptor
Vacuum Pump
(utk CFC-12/HFC-134a)
-7-
Manifol Gauge
Red
Switch
( CFC-12 / HFC-134a )
Fitting for
HFC-134a
Fitting for
CFC-12
Fitting for Vacuum Pump
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