The room controllers forward their output signal to the aggregate signal converter as 0…100% signal. Each aggregate possesses a signal converter that always converts the 0…100% signal to the aggregate's configured output signal. Demand and locking signals are coordinated between the individual controls with the converters to ensure the proper functioning of the application.
Figure: Examples of aggregate converters with locking and demand signals as well as output signals
Key:
AirFlHldH | Locking signals for electric heating coils to prevent the electric heating coils from overheating when the fan coil plant is switched off (overrun). |
| HCL | Heating coil control |
AirFlHReq | Demand signal for heating coils to VAV requiring air volume for heating |
| S | Segment or segments |
AirFlSta | Locking that ensures that heating coils can only be enabled if volume flow is available. |
| V | IAQ controller output |
C | Cooling controller output |
| VAV | VAV actuator control |
H | Heating controller output |
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