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In order for the valve to operate correctly, the user defines the pre-set temperature for 4 intermediate external
temperatures: -20ºC, -10ºC, 0ºC and 10ºC. The user selects external temperature value using LEFT and RIGHT arrows and
defines a corresponding pre-set temperature value using DOWN and UP arrows.
Heating curve – a curve according to which the pre-set controller temperature is determined, on the basis of external
temperature. In our controller, this curve is constructed on the basis of four pre-set temperatures. The more points
constructing the curve, the greater its accuracy, which allows its flexible shaping. In our opinion, four points seem a very good
compromise ensuring decent accuracy and easiness of setting the course of this curve.
NOTE
After weather-based control has been activated, <Pre-set valve temperature > parameter is not available.
6.10.
PROPORTIONALITY COEF FICIENT
Proportionality coefficient is used for defining valve stroke. The closer to the pre-set temperature, the smaller the stroke. If
the coefficient value is high, the valve takes less time to open but at the same time the opening degree is less accurate. The
following formula is used to calculate the percent of a single opening:
(PRE-SET_TEMP - SENSOR_TEMP) * (PROP_COEFF /10)
6.11.
MAXIMUM FLOOR TEMPERAT URE
This setting is used when the valve type is set as floor valve. After this temperature has been reached, the valve closes
completely. When the maximum floor temperature is reached, <CH boiler protection> function is deactivated. In such a case,
protection of the underfloor heating installation is assigned higher priority.
6.12.
RETURN PROTECTION
This function enables the user to set boiler protection against too cool water returning from the main circulation, which could
cause low-temperature boiler corrosion. The return protection involves closing the valve when the temperature is too low,
until the short circulation of the boiler reaches an appropriate temperature level. Once it is activated, the user presets the
minimum acceptable return temperature.
6.13.
VALVE REMOVAL
This option is used to remove the valve from the controller memory. Valve removal is used e.g. at disassembling the valve or
module replacement (re-registration of a new module is necessary).
6.14.
FACTORY SETTINGS
This parameter is used to restore the factory settings of a given valve.
7.
FACTORY SERRINGS
This function enables the user to restore the valve settings saved by the manufacturer.
