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7.7. CH SENSOR SELECTION

This option is used to select the sensor which should serve as CH sensor. It may be any sensor which is connected to the

controller.

NOTE

Always make sure if proper sensor is selected to ensure correct pump operation.

7.8. PROTECTIONS

 CH boiler protection - this function serves to prevent the

hazardous growth of CH boiler temperature. The user

sets the maximum acceptable CH boiler temperature. In

case of the hazardous growth in temperature, the valve

begins to open in order to cool the CH boiler down. This

function is activate by default.

NOTE This option is not available for floor valves.

 Return protection - this function is used to set CH 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 appropriate

temperature.

NOTE

To ensure effectiveness of this protection, it is necessary to activate the valve in the heating circulation menu.

7.9. VELVE DEACTIVATION

Once this function is selected, valve operation depends on weekly control settings and external temperature.

 Weekly control - once this function is selected, the user may activate/deactivate weekly operation schedule and

define the time when the valve will be closed.

NOTE

Operation schedule in <Weekly control> may be defined as ‘weekly control ON/OFF’, which is different from

Weekly control presented elsewhere in the menu. Weekly control is described in detail in section VIII.

Tech Controllers i-2 User Manual

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