ST-408N – user's manual
opened whereas in the case of floor valve it is closed.
III.b) Valve 2
In this submenu the user adjusts the basic parameters of the second valve similarly
as in the case of valve 1.
III.c) DHW pump (of the water boiler)
This function enables the user to adjust the parameters of DHW pump operation.
III.c.1) DHW set temperature
This function is used to adjust the set temperature of domestic water. It may be
done in the main screen of the controller when DHW view is active. After the water
in the water boiler reaches this temperature, the controller switches off the DHW
pump. The pump will be enabled again when the temperature drops below the set
value minus DHW hysteresis.
III.c.2) Operation modes
This function enables the user to switch off the DHW pump if it is not used, or
to activate automatic operation (the pump operates according to parameters
described in the following section).
III.c.3) DHW hysteresis
This option is used to set the hysteresis of the water boiler set temperature. It
is the difference between the set temperature (desired temp. of the water boiler)
and the temperature of returning to operation mode. For example, if the set
temperature is 55°C and the hysteresis value is 5 °C, the DHW pump is switched off
when the set temperature of 55°C is reached, and it is activated again when the
temperature drops to 50°C.
-
6
-