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 components
Hydronic balancing of radiators
Function and operating behaviour of a circulating pump
Function and operating behaviour of a heating controller
Function and operating behaviour of a four-way mixing valve
Specification
Trainer for heating engineering
Heating controller with feedback of the feed flow temperature
4-way mixing valve DN 20
Circulating pump
7 rotameters
4 plate heat exchangers as radiators
5 bimetallic dial thermometers
2 cold water connections DN 15
2 water connections for boiler DN 15
1 differential pressure overflow valve
Technical Data
Pump
Power consumption: 60W
Max. flow rate: 60L/min
Max. head: 4m
Radiator
Plate heat exchanger with 8 plates
Capacity: 3kW
Heating controller with feedback of the feed flow temperature