Tech Controllers EU-L-4X WiFi User Manual page 19

➢ Calibration - This function can be used to calibrate the built-in valve, e.g. after prolonged use. During calibration,
the valve is set to a safe position, i.e. for the CH valve and
floor valve and Cooling
➢ Single stroke - This is the maximum single stroke (opening or closing) that the valve can perform during single
temperature sampling. If the temperature is close to the set point, this stroke is calculated on the basis of the
Proportionality coefficient
can be reached, but the set temperature is reached over a longer period of time.
➢ Minimum opening - A parameter that specifies the smallest degree of valve opening in percent. This parameter
enables users to leave the valve slightly open to maintain a minimum flow.
CAUTION
If the minimum opening of the valve is set to 0% (complete closing), the pump will not operate when the valve is
closed.
➢ Opening time - A parameter that specifies the time it takes the valve actuator to open the valve from 0% to 100%.
This time should be selected to match that of the valve actuator (as indicated on its nameplate).
➢ Measurement pause - This parameter determines the frequency of measuring (control) of water temperature
downstream of the CH installation valve. If the sensor indicates a temperature change (deviation from the set point),
then the solenoid valve will open or close by the preset value to return to the preset temperature.
➢ Valve Hysteresis - This option is used to set the valve setpoint temperature hysteresis. This is the difference
between the preset temperature and the temperature at which the valve will start to close or open.
Example: Valve preset temperature: 50°C
Hysteresis: 2°C
Valve stop: 50°C
Valve opening: 48°C
Valve closing: 52°C
When the set temperature is 50°C and the hysteresis is 2°C, the valve will stop in one position when the temperature
reaches 50°C, when the temperature drops to 48°C it will start to open and when it reaches 52°C the valve will start
to close in order to lower the temperature.
➢ Valve type – enables users to select the following valve types:
•
CH valve – for controlling the temperature in the CH circuit by using the valve sensor. The valve sensor must be
placed downstream of the mixing valve on the supply pipe.
•
Floor valve - for controlling the temperature by using the underfloor heating circuit settings. The floor type
protects the floor system against excessive temperatures. If the type of valve is set as CH and it is connected to the
floor system, it may lead to floor system damage.
•
Return protection - for controlling the temperature at the return of the installation through the use of the return
sensor. Only return and boiler sensors are active in this type of valve, and the valve sensor is not connected to the
controller. In this configuration, the valve protects the boiler's return from cold temperature as a priority, and if
the Boiler protection
open), the water flows only in a shortened circuit, while the full opening of the valve (100%) means that the
shortened circuit is closed and the water flows through the entire central heating system.
types - to closed position.
parameter. Herein, the smaller the single stroke, the more precisely the set temperature
function is selected, it also protects the boiler from overheating. If the valve is closed (0%
Return protection types
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- to fully open position, and for