The base unit ET 915 is, dependent on the objective of the experiment, extended into complete refrigeration circuit with one of the models available as accessories (ET 915.01 refrigerator, ET 915.02 refrigeration system with refrigeration and freezing stage, ET 915.06 simple air conditioning system, ET 915.07 air conditioning).
  The main components of ET 915 are compressor, condenser and receiver plus electrical and communications systems. The models are plugged onto the base unit and connected hydraulically with refrigerant hoses and electrically with cables. Self-sealing couplings reduce the refrigerant loss to a minimum. All components are arranged well visible to allow their operation to be monitored.
  The modern and powerful software is an integral part of the training system in the form of hardware/software integration (HSI). It enables the comfortable execution and analysis of the experiments. The experimental unit is connected to the PC via a USB interface.
  The educational software guides step by step through the experiments. With explanatory texts and illustrations it significantly aids the understanding of the theoretical principles. Temperatures and pressures in the system are recorded by sensors and displayed dynamically in the educational software. The effect of parameter changes can be tracked in log p-h and h-x diagrams. The system is also controlled via the software.

  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

In conjunction with ET 915.01, ET 915.02, ET 915.06 and ET 915.07
- Fundamentals of the refrigeration cycle
- Fundamentals of air conditioning
- Components in a refrigeration system/air

  conditioning system
- System operation
- Fault finding