HL 300 Central heating system
The trainer contains two independent heating circuits that are equipped with a three-way mixing valve and a four-way mixing valve.
The heat provided by an electric boiler can be dissipated via four different radiators. To investigate the full load behaviour of the boiler over an extended period, a plate heat exchanger is fitted in the domestic water circuit. The system has a closed water circuit with expansion vessel. Relevant temperatures and pressures are indicated on easy-to-read instruments.
The system is controlled using a state-of-the-art digital controller.
- modern heating system with digital controller
- closed water circuit with expansion vessel
Electric boiler, 4 stages
- power: 6-9-12-15kW
- max. feed temperature: 95°C
- water tank capacity: 16L
Pump
- power consumption: 70W
- max. flow rate: 6L/min
- max. head: 4m
Domestic water pump
- power consumption: 20W
- max. flow rate: 640L/h
- max. delivery pressure: 0.14bar
Plate heat exchanger: 3kW, 10 plates
Water meter: 2.5m3/h
Measuring ranges
- temperature: 3x 20…120°C / 2x 0…120°C / 2x 0…100°C / 4x 0…80°C
- pressure: 8x 0…2,5bar
- flow rate: 100…1000L/h
400V, 50Hz, 3 phases
230V, 60Hz, 3 phases
- function and operating behaviour of a modern heating system with digital heating controller
- 4-way mixing valve and 3-way mixing valve
- electric boiler
- 2 circulating pumps, 1 domestic water pump
- 4 different radiators and additional plate heat exchanger as domestic water consumer
- coloured pipes indicate feed and return flow
- measurement of temperature, pressure and flow rate
- familiarisation with the components of a modern heating system and their function
- operating behaviour of a digitally controlled heating circuit with three-way mixing valve
- operating behaviour of a digitally controlled heating circuit with four-way mixing valve
- investigations on a plate heat exchanger operated in counterflow
- investigation of pressure loss on different valves and fittings
- filling heating systems
- commissioning heating systems
- hydronic balancing of radiators
- determination of pump curves
- determination of pipework characteristics
- behaviour of system with air in the pipework