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ET 605 Air Conditioning System Model
Education / GUNT Hamburg / Thermal Engineering and HVAC / Refrigeration and Air Conditioning Technology /

Air conditioning technology is a key topic in building services engineering. For this reason air conditioning technology plays an important role during the training of skilled workers and engineers.
  The clear trainer ET 605 represents a complete air conditioning system with an air duct and a climatic chamber. The main components of the air conditioning system are the air cooler with condensing unit, fan, steam humidifier and air heater. Three motorised ventilation flaps control the air distribution in the air conditioning system. The climatic chamber is equipped with two different heat sources (wet and dry). Temperature and relative humidity are measured at relevant points in the air duct and displayed digitally. For the refrigeration circuit two manometers with integrated temperature scale and a flow meter provide all relevant measurements. 
  ET 605 is operated manually. A key feature of the air conditioning system is that it is fully ready for various automation solutions. The user can thus focus on this important topic during a lesson.
  The following solutions are available:
- Software controller ET 605.01
- Industrial air conditioning controller ET 605.02

- Signal connection box ET 605.03 for 
  the integration of an individual user solution.


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

Learning Objectives / Experiments

- Air conditioning system and its components
- Conditioning room air 
- Mixing different air flows
- Representation in the h-x diagram for humid air
  * humidification and dehumidification 
  * heating and cooling 
- Representation of the circuit in the log p-h diagram
- Effect of a cooling load (dry and wet)
- Recirculating and outer air operation
In conjunction with optional accessories
- Automation in an air conditioning system


[1] Model of an air conditioning system with outer air and recirculating operation

[2] Air duct with transparent front
[3] Air duct with fan, air cooler, humidifier, flaps, air heater and sensors

[4] Chamber with wet (latent) and dry (sensitive) heat source as cooling load

[5] Motorised flaps for recirculating and outer air operation

[6] Process schematic with signal lamps
[7] Air conditioning system ready for different automation solutions: 4 data cable connections to integrate the accessories

[8] Refrigerant R134a, CFC-free

Technical Data

Air-cooled condensing unit 
- power consumption: 140W at -10°C
- refrigeration capacity: 320W at +5/40°C
- heating capacity: 400W
Air heater 
- heating capacity: 360W 
2 heaters in the chamber as cooling load
- power output: 0...250W each, freely adjustable
Flow cross-section of the air duct
- w x h: 155x155mm

Measuring ranges
- temperature: 0...50°C
- humidity: 10...90% r.h.
- power: 0...600W (power consumption of the

  compressor in the condensing unit); 2x 0...300W

  (cooling loads)
- pressure (refrigerant): -1...9bar / -1...24bar
- flow rate (refrigerant): 1.5...23.5L/h
- air velocity: 0...2.5m/s

Dimensions and Weight
LxWxH: 2000x750x1900mm
Weight: approx. 300kg
Required for Operation

230V, 50/60Hz, 1 phase or 230V, 60Hz, 3 phases
Water connection

Scope of Delivery

1 trainer, filled with refrigerant

1 set of instructional material

Order Details
061.60500  ET 605  Air Conditioning System Model