Operating principle

The throttle circuit controls the net thermal power passing through the circuit by vary the flow in the end unit. This means that the flow on the secondary side as on the primary side is variable. In full load operation the 2-way valve is completely opened whereas in partial load conditions the 2-way valves is positioned in function of the process value (measured room temperature) and set point (room temperature). 

Individual components and parameters

1. 2-way valve
2. Balance valve for primary balancing

System check 

As this mixing circuit is a so called 'passive' circuit, the circuit needs a primary pump to extract hot water from the primary side. If the software encounters a missing pump on the primary side of the passive circuit, it will report this as a problem while running the system check. 

Related models:

•  TOKEN  - NjQwfG9mUEF2bzla - Passive circuit without primary pump