Warm and cold draught protection: This feature stops the fan when the set point condition is satisfied and the water temperature is too low or too high, ensuring that air that is too cold or too warm does not cause discomfort to the room occupants. Air sensor: This is unit-mounted – if the control is wall mounted, a second air sensor located in the control can be used for fine tuning of the desired room temperature. Frost protection: This function ensures that the room temperature is kept above a minimum level. If the unit is in off mode, and the room temperature drops below 7 °C, frost protection is enabled and the unit operates in heating mode until the temperature rises above 9 °C. At this point the unit is switched off again. Booster heating management optimization (available with electric heater option): If the water temperature is below 30 °C the system will work in the heat demand mode and the electric heater will be the only available heating source. If the water temperature is above 35 °C the system will work in the booster heating mode, energising the water valve and electric heater together. The booster heating function will be deactivated if the water temperature is above 45 °C (the electric heater will be de-energised). Energy saving: This feature allows saving energy when the room is unoccupied, without the need to switch off the unit. When the energy-saving button is pressed, the actual set point will be modified as follows, without changing the position of the set point selection knob: Cooling mode: Set point raised by 4 °C - Heating mode: Set point lowered by 4 °C The unit will resume normal operation, once the energy saving button is pressed again. LED intensity: For offices or light commercial applications, 10 seconds after the latest use of the user interface, all the necessary LEDs are lighted on at a reduced intensity. As soon as the user touches again the user interface, LED have to come back to normal light. In order not to disturb hotels customers, the thermostat can be configured from Night Mode to Dark Mode: 10 seconds after the latest use of user interface, all the LEDs are switched off. As soon as the user touches again the user interface, LEDs of the current condition are switched on with normal light. Air sampling: If no fan request is made and the Air sampling jumper is in ON position, the control performs the Air sampling function: the air is moved in the room, thermal stratification is reduced, ensuring a more reliable ambient temperature reading. Continuous fan: If there is no fan request and the Continuous fan jumper is in ON position, the control selects fan speed Low, Medium or High according to the fan-speed selection, regardless of thermal station conditions. If the fan is controlled in Auto fan mode and the control is not in the demand phase, the fan is permanently activated at Low speed. External contact: A high voltage input signal for external contact is present. If the external contact is activated, device behaviour depends on its configuration on site: Presence detection (empty room with hotel door card), Energy saving mode is activated, internal temperature is raised by 4 °C in cooling mode and reduced by 4 °C in heating mode. - Window Contact: During OFF mode (window open), all outputs are disconnected (fan, valves, etc.) and only the frost protection.
Master/Slave control: Thermostat type A_AC and B_ AC: the Control Board for grouping accessory (42N9006) is allowing fan speed relay only (water valves have to be wired/relayed separately) up to 300 units with control on Air temperature (no water valve), or 10 units 2 pipe with water control, or 5 units 4 pipe with water control Thermostat type C_EC and D_EC: The Thermostat EC motor version can control up to 10 LEC units by wiring in parallel the analogue 0-10 two-wires output signal (water valves have to be wired/relayed separately).
This is a communicating PID controller, combining energysaving algorithms and full control function solutions, compatible with the Aquasmart Evolution system p