ET 915.06 is part of the HSI training system for refrigeration and air conditioning technology. In combination with the base unit ET 915 the operational model of a simple air conditioning system is created. The model is plugged onto the base unit, secured using fasteners and connected with refrigerant hoses to become a complete refrigeration circuit for the air cooler. In systems for room cooling the air to be cooled is aspirated from the room by a fan, cooled and fed back into the room. This model demonstrates the principles of room cooling and the components of an air conditioning system. The model ET 915.06 includes an air duct with transparent front, fan for air transport, an evaporator as air cooler and an expansion valve. All components are clearly arranged on a panel. The individual components of the system, here the compressor and the fan, are controlled via the software included in the scope of delivery of ET 915. The software offers the option to simulate faults. The air flow is determined via a pressure measurement using a pitot tube. Temperatures before and after the evaporator are recorded by sensors, digitised and dynamically represented in the educational software.
Learning Objectives / Experiments
- Air conditioning system for room cooling and its
main components - Principle of operation of an evaporator as air cooler - Fault simulation
* Model of a simple air conditioning system for room
cooling1 * Component control and fault simulation via the
 Model of a simple air conditioning system to plug onto the base unit ET 915  GUNT training system with HSI technology  Air duct with transparent front  Evaporator as air cooler  Radial fan with throttle valve  Thermostatic expansion valve as expansion element  Sensor to record temperature and differential pressure for measuring the air flow  Units and fault simulation controlled via educational software
Air duct: 136x136x435mm Evaporator as air cooler - transfer area: approx. 900cm² Radial fan - max. power consumption: 80W - max. flow rate: 255m³/h