Ventilation Control; Cool Mode - Ferroli MERCURY SP - N 07 Manual De Instalación, Uso Y Mantenimiento

Hysteresis of thermostat regulation modes
For the unit controls, the hysteresis is 1ºC, while for wall controls, it is 0.6ºC.

Ventilation control

In the base and complete thermostat, the management of the ventilation depends on the mode of operation selected (cool, heat):
Fan speed
-
If the fan is activated, its speed can be:
Defined manually by the user
»
Defined automatically, if the fan switch is in auto position (only advanced thermostat).
»
- Thermostatic regulation of the ventilation
EIn this case the fan will activate and de-activate as described on page 20
- Thermostatic regulation in the valve
EIn the case that thermostatic regulation is configured in the valve, the fan is automatically programmed with modes of continuous
operation in cooling (fans always turned on), while in heating (as the probe at the entrance of the valve cannot control the intake of
cold air) timing of the fan is provided:
Fan ON after 180 seconds gives the order to close the valve.
»
Fan OFF after 180 seconds gives the order to close the valve.
»
The hot start function is always active (in heating) for water temperatures lower than 39ºC.
- Automatic ventilation
Fan speed is regulated on the basis of the variation of the ambient temperature and the temperature programmed by the set point.
Said variation depends on the hysteresis programmed in the regulator which is:
0.6ºC for the wall controls
»
1ºC for the unit controls
»
In the following figure, the variation values of the controller on the machine are explained. . To fit the diagrams to the wall model, the variation
values must be substituted in the following manner:
- Cooling mode: the values +1, +2, +3 change to +0.6, +1.2, +1.8
- Heating mode: the values -1, -2, -3 change to -0.6, -1.2, -1.8
Fan Speed
set point
Note: The set point stated on the axis of abscissas of the diagrams refers to the value programmed in the potentiometer by the user.
144
Heat mode
Work hysteresis
temperature

Cool Mode

Accessories
Fan Speed
Enviroment Temp.
Cool mode
Work hysteresis
temperature
set point
Heat Mode
Enviroment Temp.