Title: Aggregatkjøring.pdf.pdf
For frost protection, the water temperature in the coil is transmitted to the controller by a temperature sensor in a water return circuit of the coil. The controller always generates a signal to the valve motor that keeps a sufficient flow of hot water to protect the coil against freezing. This freeze protection is also activated when the running mode is “off”. If the water temperature falls below the alarm set point temperature (settable) the fans stop, the dampers close, and an alarm is activated.Damper motorsSupplied and installed as in flow chart specification. Spring return models (S) will have running time of about 150/16 seconds. Non spring about 150 seconds. Modulated models indicated by round symbol.Filter guards