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Domat Control System s.r.o.

UI901BL Communicative room unit with CO2 sensor

Type:  Controller
Description:  The room unit with CO2 sensor contains temperature sensor, NDIR CO2 sensor for carbon dioxide concentration measurement, humidity sensor, and control knob for setpoint control and other settings. Binary outputs are controlled over Modbus.
Connectivity:  Modbus RTU

The unit reads temperature, CO2 concentration, and relative humidity in the room, temperature correction (controlled by the knob) and required operation status which is set by short push of the knob or in the menu. In the configurable menu following values can be set and displayed: temperature, actual temperature correction; humidity; basic setpoint - day; basic setpoint - night; outside temperature for heating start; DHW temperature; heating curve type (1 - 4); operation mode (Residential with Day, Night, Time schedule, Off, or Hotel / Office with Comfort, Standby, Party, Off); fan stage (Auto, Off, St.1, St. 2, St. 3); A/C mode (Auto, Heating, Cooling, Off, Fan only); another 5 variables (air quality, fan speed etc.) - each has a profile where max. and min. values, step, number of decimals, and symbol set are defined.

It is also possible to set / reset any of the LCD symbols on the display over Modbus. The turn / push knob has three basic functions: 1. instant edit (turning the knob) - settings of one predefined analogue value, usually room temperature correction; 2. quick edit (short push) - change of predefined state, e.g. Presence (Comfort / Standby / Off), Air condition (Auto / Heating / Cooling / Fan only / Off) etc.; 3. long push - jump to menu where values are listed by turning the knob, short push selects the value to be edited, and the value is changed by turning the knob followed by short push for confirmation.

Specifications:  See attached spec. sheet.