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HL 108 Domestic Heating Circuit Training Panel
Education / GUNT Hamburg / Thermal Engineering and HVAC / Heating and Ventilation in Buildings /

A pump circulates water through four radiators. The temperature of the radiators is set using thermostatic valves.

  A digital controller keeps the room temperature constant by driving the four-way mixing valve. This valve sets the temperature of the boiler return flow and the feed flow. Cold water connections enable the heat generated to be dissipated. The differential pressure across the pipe system is limited using a relief valve. Temperatures can be read on dial thermometers.

Learning Objectives / Experiments

- Familiarisation with a central heating system and its

- Hydronic balancing of radiators
- Function and operating behaviour of a circulating

- Function and operating behaviour of a heating

- Function and operating behaviour of a four-way

  mixing valve

[1] Trainer for heating engineering
[2] Heating controller with feedback of the feed flow temperature
[3] 4-way mixing valve DN 20
[4] Circulating pump 
[5] 7 rotameters
[6] 4 plate heat exchangers as radiators
[7] 5 bimetallic dial thermometers
[8] 2 cold water connections DN 15
[9] 2 water connections for boiler DN 15
[10] 1 differential pressure overflow valve
Technical Data


- power consumption: 60W

- max. flow rate: 60L/min

- max. head: 4m


- plate heat exchanger with 8 plates

- capacity: 3kW 
Heating controller with feedback of the feed flow temperature

- inputs: 2 temperature sensors

Measuring ranges
- temperature: 0...100°C
- flow rate: 2x 150...1600L/h, 1x 0...1000L/h,

  4x 0...400L/h


Dimensions and Weight
l x w x h: 1850 x 400 x 1150 mm (panel)
Weight: approx. 90 kg (panel)
Required for Operation
230V, 50Hz, 1 phase
Cold and hot water connection: 1.5bar
Scope of Delivery
1 trainer 
1 manual
Order Details

065.10800  HL 108  Domestic Heating Circuit Training Panel