SiE33-003
New Refrigerant R-407C
167
Part 3
New Refrigerant R-407C
1. Precautions in Servicing the Models with New-type Refrigerant.........168
1.1 Tools Required .................................................................................... 168
1.2 Notes for Work Procedures ................................................................. 169
2. Changes Required by New Refrigerants.............................................170
2.1 Changes Required by New Refrigerant............................................... 170
3. Refrigerant and Refrigerant Oil Characteristics ..................................171
3.1 Refrigerant Characteristics .................................................................. 171
3.2 Refrigerant Oil Characteristics............................................................. 173
4. Refrigerant Cylinders ..........................................................................174
4.1 Cylinder Specifications ........................................................................ 174
4.2 Handling of Cylinders .......................................................................... 175
5. Service Tools ......................................................................................176
5.1 Tool Compatibility ................................................................................ 176
5.2 New Tools Required for HFCs and Reasons of Change..................... 177
6. Cautions During Service Operations
(Changes Required by New Refrigerants) ..........................................180
6.1 The Three Basic Rules for Refrigerant Piping
Must Be More Strictly Observed.......................................................... 180
7. Operation Guideline ............................................................................181
7.1 Operation Guideline............................................................................. 181
8. Temperature-pressure Conversion Table for New Refrigerants .........182
8.1 Pressure and Temperature.................................................................. 182
9. Measures to Take in the Case of Gas Leaks ......................................183
9.1 Gas Shortage ...................................................................................... 183
9.2 Measure for Gas Shortage .................................................................. 184
10.Safety Precautions ..............................................................................185
10.1 Safety Precautions .............................................................................. 185
11.Problems Resulting from Negligence of Caution Items.......................186
11.1 Problems Resulting from Negligence of Caution Items ....................... 186
12.Difference Between Pascal and Conventional Pressure Unit .............187
12.1 Comparison of MPa and kgf/cm
²
......................................................... 187
13.Thermodynamic Characteristic Charts (HFC407C) ............................188
13.1 Thermodynamic Characteristics of R-407C......................................... 188
Si33-003.book Page 167 Monday, June 25, 2001 9:06 AM
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