CR24-B3 - Belimo Room temperature controller with 3 sequences AC 24 V Selection mode

CR24-B3 - Room temperature controller with 3 sequences AC 24 V Selection mode

•    Room temperature controller with 3 sequences
•    AC 24 V
•    Selection mode, display: AUTO / ECO / MAXIMUM
•    Setpoint: 18...35º C, rotary button: +/- 3 K
•    Temperature sensor: NTC internal 0, external: 10...45º C
•    5 inputs: EHO, Stand-by, (C/O / Boost / dewpoint),
•    0...10 V shift, ext. temperature sensor
•    3 outputs: VAV 0 / 2...10 V, heating 3-point,
•    Heating / cooling 0...10 V
•    Control characteristics: modulating, P-controller, P-Band switchable
•    Housing colour white RAL 9003
•    Base colour light grey NCS 2005 -R 80 B

Features

• Energy hold off In energy saving mode, the room temperature is reduced to building protection level, i.e. either the heating setpoint is significantly reduced or the cooling setpoint is significantly increased, for instance in a room with an open window.
  
  
• Stand-by The room temperature is reduced to stand-by level, i.e. either the heating setpoint is slightly reduced or the cooling setpoint is slightly increased, for instance in a room that is temporarily unoccupied..


• Frost The frost protection function is activated if the actual room temperature falls below 10°C.


• Change-over heating or heating/cooling.
  
  
• Chilled ceiling with dew point limiting If the temperature falls below the dew point, the corresponding output is set to 0.
  
  
• Boost The room can be ventilated with the maximum volume flow (max) or heated or cooled with the maximum capacity.
  
  
• External temperature sensor An external temperature sensor can be connected to the analog input ai1, for instance in order to measure the average room temperature in the exhaust air duct.
  
  
• External setpoint shift An external DC 0...10 V signal at the analog input ai2 can be used to shift the basic setpoint 0...10 K, for instance for the summer/winter compensation.

•    Nominal voltage AC 24 V 50/60 Hz
•    For wire sizing 3 VA, without actuators
•    Power supply range AC 19.2...28.8 V
•    Connections Terminal block 1...3: 2.5 mm2Terminal block 4...8: 1.5 mm2
•    Control characteristics P / PI – P-band heating / cooling    Selectable: 1.5 / 1.0 K or 3.0 / 2.0 K
•    External temperature sensor (ai1)    Type NTC, 5 kΩ, sensing range 10...45°Cfor example Belimo type TFK
•    Heating setpoint Range 15...36°C (default 21°C) – Energy hold off    Heating 15°C / cooling 40°C – Stand-by    Heating –2 K / cooling +3 K
•    Dead band 1 K
•    Frost limit temperature 10°C
•    Operation (CR24-B.. only) – Mode switch and status indication (LEDs) AUTO (green) – ECO (orange) – MAX (red) – Rotary knob for setpoint adjustment    ±3 K
•    Communication port for field devices    2 x PP (for PC-Tool, MFT remote control etc.)
•    2 x analog, 3 x digital – External temperature sensor (ai1)    Type NTC, 5 kΩ, sensing range 10...45°C – External setpoint shift (ai2)    0...10 V corresponds to 0...10 K – Digital inputs (di1, di2, di3)    Contact rating 10 mA
•    3 x analog – VAV system output (ao1)    (0)2 ... 10 V, max. 5 mA – Heating / cooling output (ao2)    0...10 V, max. 5 mA – Heating output (ao3)    3-point, AC 24 V, max. source current 0.5 A / 10  (optimized for actuators with a running time of approx. 150 s)
•    Protection class III Safety extra-low voltage
•    Degree of protection IP 30 to EN 60529
•    Mode of operation Type 1 to EN 60730-1
•    Software class A to EN 60730-1
•    EMC    CE conformity to 89/336/EEC
•    Ambient conditions – Operation     0...+50°C / 20...90% rH (without condensation – Transport and storage    –25...+70°C / 20...90% rH (without condensation
•    Dimensions (H x W x D)    99 x 84 x 32 mm
•    Weight 105 g
•    BaseplateCover NCS2005-R80B light gray (corresponds approx. to RAL 7035)RAL 9003-Signalweiss