Refrigerator cycle repair
As the service tools for the coolant gas CFC-12 (R-12) cannot be
used for HFC-134a, the specific tools must be used.
"FOR HFC-134a" must be indicated.
The connections of service tools are different.
CFC-12: 1/4 in
HFC-134a: 3/8 in
(HFC-134a for dehumidifier: 10 mm screw is used)
When servicing, use only the couplers, vacuum pumps,
pressure gauge hoses, valves, and charging cylinders specified
Clean the new parts with ethyl alcohol, or use oilproof
When replacing the compressor, use the new Dryer filter for
Evacuation must be performed within 15 minutes after unpacking.
If gas leak occurred, be sure to replace the compressor and Dryer filter as a pair.
If gas leak occurred, replace the leaking part irrespective of whether it is at low pressure side or high pressure
Use the service parts of Dryer filter set for HFC-134a (CDRY-A001FBK0) (with two evacuation pipes).
1. List of service tools for dehumidifier (specific use and common use)
Charging hose ass'y
3-way reducer (for charging cylinder)
Check valve (prevention of back flow of oil of vacuum pump)
Reducer (for vacuum pump)
Coupler (2 pcs.)
Nitrogen blow pressure regulator
Nitrogen blow kit
Tool box for dehumidifier
As shown above,
indicates a set of necessary tools. Here, use the tools of R-12 type.
(If any R-12 type is not available, be sure to attach the check valve when using the tools of
HFC-134a type which is applicable for refrigerator.)
•Nitrogen blow kit: Not required for dehumidifier
•Charging cylinder: Use the tools of HFC-134 type which is applicable for refrigerator.
•Leak detector: Use the tools of HFC-134 type which is applicable for refrigerator.
HFC-134a CYCLE REPAIR PROCEDURE
To low pressure pipe
To high pressure pipe
: Not applicable