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HL 500 Instantaneous Gas Heater
Education / GUNT Hamburg / Thermal Engineering and HVAC / Heating and Ventilation in Buildings /

The housing and heat exchanger of the instantaneous heater have been removed to clearly show the internal components. For safety reasons, the trainer is operated with air. Burner flames are simulated using an array of LEDs.

  A diaphragm pump with pressure regulator generates the compressed air required for operation at the correct admission pressure. All the necessary safety functions such as lighting the pilot, thermocouple flame safeguard and temperature cut-out are simulated electronically using a PLC.

  The PLC is programmed to simulate a total of 12 different faults. 


Learning Objectives / Experiments
- Gas burner adjustment by volumetric method 
- Nozzle pressure method for gas burner adjustment
- Fault finding

[1] Simulation of an instantaneous gas heater
[2] Safe operation of heater using air
[3] Diaphragm pump for pressure generation 
[4] PLC simulation of safety functions
[5] Simulation of 12 faults by PLC 

Technical Data

Instantaneous heater

- nominal thermal output: 19.2kW
Diaphragm pump: max. flow rate: 70L/min

Gas pressure controller: 16...28mbar 


- water: 0...6bar

- gas: 0...60mbar
- U-tube manometer for air: 10-0-10mbar 

Flow meters

- air: 0.75...7Nm³/h (standard cubic meter per hour)

- water: 75...1000L/h


Dimensions and Weight
l x w x h: 1650 x 800 x 1850 mm
Weight: approx. 100 kg
Required for Operation

230V, 50Hz, 1 phase

Water feed and drain via ½" hose with quick-release coupling

Scope of Delivery

1 trainer

1 manual

Order Details
065.50000  HL 500  Instantaneous Gas Heater