The bench has the following elements:
1. A hermetic piston compressor
2. A high-pressure manometer with double temperature / pressure graduation
3. A high pressure switch
4. A manual valve on the high pressure line
5. Low pressure manometer with double temperature / pressure graduation
6. Low pressure switch
7. A manual valve on the low pressure circuit
8. A TOR thermostat
9. A capacitor
10. A klixon
11. A starter relay