The system is identical in function to lower temperature demonstrations
It demonstrates a cabinet with Plexiglas viewing window and schematic diagram of the refrigeration circuit
Before and after sight glasses and high/low pressure gauges permit continuous observation of the refrigeration cycle as the refrigerant moves through the system
Another sight glass is near the filter drier so that the refrigerant may be observed after condensing but prior to expansion
Operation of the unit is controlled by a thermostat and cabinet temperature is viewed by a built-in thermometer
The 2 hand valves allow the refrigerant to be restricted and thus simulate system malfunctions for troubleshooting
