Ferroli MERCURY SP 07 Manual De Instalación, Uso Y Mantenimiento página 89

Thermostatic regulation of the cross valve
In this case, the management of the fans differs depending on operation in heating or cooling, as explained below:
- Cooling: Thermostatic regulation opens / closes the valve according to demand, while the fan is always active, even when the
thermostatic regulation has reached the temperature(min, med, or max position ) or starts and stops according to demand (auto
position) and periodic ventilation.
- Heating: The thermostatic regulation opens/closes the valve while the fan is controlling the HOT START and PERIODIC VENTILATION
functions with the corresponding delay times.
Valve
Fan
Valve
Fan
continuo
Fan
auto
The management of the cross valve carries out an ON / OFF control with indicator of valve closure on reaching the set point, depending on the
hysteresis cycles of the heating / cooling diagrams. The valves to be used are of the normally closed type, with electrothermic actuators with
opening/closing times of approximately three minutes.
The fan is controlled by timer as explained in the paragraph VENTILATION CONTROL, to constantly capture the ambient temperature.
Position of the water probe
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Heating/ cooling with thermostatic regulation in the cross valve
WaterTemp.
Accessories
Evolution of temperature
Heat mode Operation
Cool mode Operation
Water probe position
89