Injection circuit

The injection circuit is more complex in terms of the control components required, but offers a number of advantages. Both the primary circuit and the secondary circuit are operated with a constant water flow. The primary circuit pump has the task of overcoming the pressure difference of the primary circuit and the pressure loss of the actuator. The secondary circuit pump overcomes the pressure difference of the heat exchanger.

As with the admixing circuit, the output is regulated by changing the temperature of the secondary circuit flow. Depending on the valve position, more or less of the medium is "injected" from the primary circuit into the secondary circuit at the second mixing point.

Injection circuit control diagram