CO boiler operation recorder - I am looking for the above mentioned device.

Yes — you can do this with an Arduino or Raspberry Pi by sensing each 230 V line through galvanically isolated inputs, then logging the state changes and visualising them later. A simple approach is a relay with a 230 VAC coil wired in parallel with each motor, or an optocoupler-based circuit, with the relay contacts feeding a microcontroller input; the controller can count the pulse duration and write it to a memory card [#16186341] Another option is an AC current sensor or a relay into Raspberry Pi GPIO, then use software such as Zabbix or Domoticz to collect the data and draw the graphs automatically [#16186475][#16957849] If you prefer a ready-made solution, a PVmonitor/LanKontroler setup was also suggested for boiler-room data logging and historical graphs, at about 300 PLN for the equipment [#16291217] A simple laptop with a two-channel input interface and a small logging program was also mentioned as a cheaper alternative than dedicated industrial hardware [#16186313]