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UC905 Room unit, communicative

Room unit, communicative

Display 60 x 60 mm, push / turn knob, temperature, humidity and CO2 sensor, setting of operation mode, VAV box volume and setpoints, status indication and switching, Modbus / RS485 galv. separated

Datasheet

The UC905 room unit is a communicative human-machine interface for VAV unit controller FCR015.

  • VAV systems – measurement and control of room temperature and CO2 concentration

The unit reads room temperature, humidity and CO2  concetration in the room air, temperature correction / setpoint  by a knob, and required operation mode which is set by a short push or in the menu. Data is transmitted to the room controller. The main controller, FCR015, may send to the unit other data (heating / cooling mode, fan stage, day / night / standby mode etc.) which are displayed on the LCD display. 

Units are intended for operating in a normal and chemically non-aggressive environment. They do not need any servicing or maintenance. The device consists of two parts: bottom with screw terminal block and cover containing PCB, sensors, display, and the knob. The bottom part is fixed by 2 or 4 screws to any flat surface or a flush-mounting box Ø 50 mm. At the back of the bottom there is an aperture for cabling. The bottom should be installed and cabling connected first, and the upper part inserted after the construction works have been finished to prevent damage to the unit. 

Connect the room unit to FCR015 over a 4 core cable, the most suitable types are JY(St)Y or LAM 2x2x0.8. Use the same type which powers the FCR015 controller as if the room unit power is taken from the FCR015 terminals, the cores in a terminal should be of the same cross-section.