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ET 620 Air Conditioning and Ventilation System Show data sheet (pdf file) Print page
Technical Description

  The experimental set-up represents a real air conditioning and ventilation system. The system capacity is sufficient to climatise a laboratory room.
  The air conditioning and ventilation system includes a filter element, a fan with controlled speed, a direct evaporator as air cooler, an electric air heater and humidification by steam humidifier. The following functions are possible: heating / cooling and humdifiying / dehumidifying. For this purpose the active components can be run either manually individually or via a central PLC air conditioning controller in automatic operation. The air conditioning controller controls the temperature and air humidity independent of each other. Via time programs, operation is possible dependent on the time of the day or the day of the week, as in reality. Pressure losses can be measured at each section of the duct.
  All common components, such as filter, air heater / air cooler, outlets, smoke detector, multi-leaf dampers, inspection and fire protection flaps are available and can be explained. A standard connection piece in the air duct enables the connection to an external air duct system to climatise an existing room.

  The air conditioning and ventilation system consists of three independent system components: main unit, steam humidifier and

condensing unit. The connection is performed via hoses. Due to the waste heat the condensing unit should not be placed inside the room to be climatised.
  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

Learning Objectives / Experiments

- Practice-oriented principles of air conditioning and 

  ventilation technology
- Design and servicing of an air conditioning and

  ventilation system
- Principles of room air conditioning (h-x diagram)
- Explanation of components: filter, air heater, air

  cooler, humidifier, condensing unit, air conditioning

  controller, flaps, outlets
- Operation of safety devices
- Measurement of pressure curve and pressure

- Effect of air cooler, air heater and humidifier on the

  state of the air at the outlet
- Investigation of the control behaviour of an

  automatic air conditioning controller, determination

  of limiting factors


* Complete air conditioning and ventilation system for

  laboratory operation1
* High practical relevance due to real dimensions and

  use of commercial components1
* Manual or automatic operation by PLC air

  conditioning controller1
* Connection of an external air duct system possible

Alternative products
ET 600 -- Conditioning of Room Air
ET 611 -- Air Conditioning System with Chamber
HL 720 -- Ventilation System
ET 620 Real Air Conditioning and Ventilation System
[1] Practice-oriented air conditioning and ventilation system with 3 independent system components: main unit, condensing unit, steam generator
[2] Manual or automatic operation via PLC air conditioning controller
[3] Main unit with air duct, fan, air conditioning system
[4] Air conditioning system with direct evaporator as air cooler, electric air heater, humidification
[5] Hoses connect direct evaporator to condensing unit, humidification to steam humidifier
[6] Air duct from hot galvanised sheet with sight window and pressure measurement connections to record pressure curves
[7] Air duct with filter, multi-leaf damper, ceiling vent, protective grating, ventilation grille, fire protection flap, inspection flap, sound insulation link, smoke detector
[8] Standard connection piece to connect to external ventilation system
[9] Refrigerant R404a, CFC-free
Technical Data
Fan, speed-controlled 0...1500min-1
- max. air flow: 2500m/h, max. pressure level: 715Pa
- drive motor power: 1,1kW
Air heater, 4 stages: 0-5-10-15-20kW
Air cooler (direct evaporator), cooling capacity: 27kW
Condensing unit
- rated cooling capacity: approx. 16,6kW at 7.2/32C
- power consumption: approx. 7,4kW at 7.2/32C
Steam humidifier
- steam capacity: 10kg/h
- power consumption: 7,5kW
External standard connection piece: 400x400mm
Duct cross-sections
- bottom: WxH: 630x630mm, top: WxH: 358x358mm
Inclined tube manometer: 0...750Pa
Dimensions and Weight
LxWxH: 4000x810x1770mm (air conditioning system)
LxWxH: 1000x700x1130mm (condenser)
LxWxH: 450x500x1050mm (steam generator)
Weight: approx. 800kg
Required for Operation

400V, 50/60Hz, 3 phases or 230V, 60Hz/CSA, 3 phases

Water connection

Scope of Delivery

1 main unit

1 condensing unit

1 steam humidifier

1 set of hoses + cables

1 set of instructional material

Order Details

061.62000  ET 620  Air Conditioning and

                                Ventilation System

© 2005 G.U.N.T. Gerätebau GmbH