Closed loop dryer systems require consoles with one control component only. Output regulators are unnecessary. A programmable logic controller linked to a dewpoint measuring instrument for load dependent control is useful for adaptation to differing states of loading. The possibilities of such a control system are described in detail in section 5.7.4. Dryer internal limiting values are utilised for:
- Cooling water temperature
- Operating pressure
- Inlet temperature
- Heating temperature
- Functioning of the fittings
- Pressure dewpoint
