Belimo CR24 Series Product Information
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Belimo CR24 Series Product Information

Belimo CR24 Series Product Information

Single room controllers
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Product information
CR24-.. Single room controllers

Table of contents

Overview of the system
Technical data sheets
CR24-B1 / CR24-A1 Single room controllers
CR24-B2 / CR24-A2 Single room controllers
CR24-B2E / CR24-A2E Single room controllers
CR24-B3 / CR24-A3 Single room controllers
Setpoint calculation
Energy hold off / Stand-by / VAV-function
Electric air heater / External temperature sensor / Supply air temperature limitation
CR24-..
2
3
5
7
9
13
15
17
18
19
20
21
22
23
24
25

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Summary of Contents for Belimo CR24 Series

  • Page 1: Table Of Contents

    Energy hold off / Stand-by / VAV-function Electric air heater / External temperature sensor / Supply air temperature limitation External setpoint shift / Air flush Change-over Boost Chilled ceiling Rolling start / Excess temperature protection / Step control Dimensions, Installation, commissioning, service www.belimo.com...
  • Page 2 CR24-.. Overview of the system Single room controllers CR24-B1 CR24-B2 CR24-B2E CR24-B3 VAV applications Compact Universal Water applications Rotary actuators and characterised control valves Air applications Damper actuators www.belimo.com...

  • Page 3: Overview Of Functions

    The technology, functionality and handling of the new microprocessor-controlled room tem- perature controllers are perfectly adapted to the Belimo actuators for motorised air and water final control elements. The functional classification into three basic types with up to three output sequences and the large number of specific applications facilitate cost-effective system solutions for individually controlling the room climate and reducing energy consumption.

  • Page 4: Operation

    • • • • – External setpoint shift 0...10 V Outputs Number • – (0)2...10 V system output for Belimo VAV controller or changeover • • • – (0)2...10 V system output for Belimo VAV controller • • • – Heating output 3-point •...
  • Page 5 • The device may only be opened at the manufacturer's site. It does not contain any parts that can be replaced or repaired by the user. • The device contains electrical and electronic components and must not be disposed of as household refuse. All locally valid regulations and requirements must be observed. www.belimo.com...
  • Page 6 U5 6 7 8 CR24-B1 Inputs Output ai1 External temperature sensor ao1 System output for Belimo VAV controller di1 Energy hold off Other connections di2 Stand-by / Changeover PP1 Diagnostics socket 1 ai2 External setpoint shift PP2 Diagnostics socket 2...
  • Page 7 – P-band heating / cooling Selectable: 1.5 / 1.0 K or 3.0 / 2.0 K External temperature sensor (ai1) Type NTC, 5 kΏ, sensing range 10...45°C for example Belimo type TFK Heating setpoint Range 15...36°C (default 21°C) – Energy hold off Heating 15°C / cooling 40°C...
  • Page 8 1 2 9 10 6 7 8 CR24-B2 Inputs Output ai1 External temperature sensor System output for Belimo VAV controller di1 Energy hold off 9/10 ao3 Heating (3-point) di2 Stand-by Other connections ai2 External setpoint shift PP1 Diagnostics socket 1...
  • Page 9 – P-band heating / cooling 2 K with 2 resp. 3 stages / 2.0 K External temperature sensor (ai1) Type NTC, 5 kΏ, sensing range 10...45°C for example Belimo type TFK Heating setpoint Range 15...36°C (default 21°C) – Energy hold off Heating 15°C / cooling 40°C...
  • Page 10 [°C] Y [V] Output voltage in volt Cooling output [°C] Room temperature in degrees Celsius System output for Belimo VAV controller Heating setpoint Heating stage I Cooling setpoint Heating stage II Output on/off Maximum volumetric flow Maximum volumetric flow heating...
  • Page 11 Open/close valve VAV 1 Inputs Output Supply air temperature limiter System output for Belimo VAV controller Open/close radiator Energy hold off do3/1 Heating stage I valve Stand-by do3/2 Heating stage II External setpoint shift...
  • Page 12 www.belimo.com...
  • Page 13 – P-band heating / cooling Selectable: 1.5 / 1.0 K or 3.0 / 2.0 K External temperature sensor (ai1) Type NTC, 5 kΏ, sensing range 10...45°C for example Belimo type TFK Heating setpoint Range 15...36°C (default 21°C) – Energy hold off Heating 15°C / cooling 40°C...
  • Page 14 4 12 ai/di1 di2 di3 1 2 9 10 11 6 7 8 CR24-B3 Inputs Output External temperature sensor System output for Belimo VAV controller Energy hold off 9/10 Heating (3-point) Stand-by Heating / Cooling External setpoint shift Other connections...
  • Page 15 Rotary knob PC-Tool connection for control sequence simulation Diagnostics sockets 1 and 2 are used for PP communication with the connected Belimo MFT actuators or VAV controllers. As a result, phy- sical access to the field devices is not required. www.belimo.com...
  • Page 16 www.belimo.com...
  • Page 17 + 3 K stand-by offset cooling Energy hold off Fixed 15°C (building protection) Fixed 40°C (building protection) Frost Fixed 10°C Not relevant Examples Comfort Stand-by +1 K dead band +1 K dead band 23°C comfort heating setpoint W 23°C comfort heating setpoint W www.belimo.com...
  • Page 18 – Providing or assisting heating with electric air heater. – Improving the air quality during heating. heating CR24-B2 configuration The VAV function is configured using DIP switch Output signal [°C] CR24-B3 configuration Room temperature Current setpoint The VAV function is configured using DIP switch www.belimo.com...
  • Page 19 CR24-B2E – Combined application with EHO switch: EHO active = supply air temperature limitation not active Supply air Supply air temperature temperature [°C] [°C] Mean value 45 ... 46°C Time Time Without supply air limitation With supply air limitation www.belimo.com...
  • Page 20 – The VAV output ao1 is set to a fixed value of V (10 V). Y [V] – The heating output ao3 remains in the normal control mode and Air flush continues to be controlled by means of the heating sequence. Output signal [°C] Room temperature Current setpoint www.belimo.com...
  • Page 21 The CR24-B3 controller is suitable for applications that require both a stand-by function and a changeover function. ao1 U5 Configuration CR24-B1 The changeover function is configured using DIP switch 2 Belimo actuator Y U5 Y [V] Heating Cooling Changeover Output signal Room temperature [°C]...

  • Page 22: Boost - V

    The air is always conditioned to the comfort setpoint W, even if stand- by (d1) is active, in order to facilitate room preconditioning. Configuration (CR24-B3 only) This boost function is configured using DIP switches 4 (boost on) and 5 (boost temperature). www.belimo.com...

  • Page 23: Chilled Ceiling

    Typical applications Chilled ceiling systems that require dew point limiting. Configuration Dew point This function is configured using DIP switches 3 and 4. CR24-B3 Belimo actuator Y [V] Dew point Output signal Room temperature [°C] Current setpoint Chilled ceiling with dew point limiting and changeover...

  • Page 24: Rolling Start / Excess Temperature Protection / Step Control

    – Single steps: Simple electric air heaters or open/close radiator/zone valves (Factory setting) – Binary step: 2-step electric air heaters in 3-step mode, Binary steps 0.5 K 0.5 K 0.5 K e.g. 1/3 – 2/3 – 3/3 I / III www.belimo.com...
  • Page 25 Remove the knob and align it so that the cam is flush with the left end stop. c. Insert the knob fully. Left end stop Electrical installation AC 24 V 2.5mm 1.5mm 1.5 mm www.belimo.com...

  • Page 26: Dimensions, Installation, Commissioning, Service

    – Wire sizing values for room temperature controllers: 3 VA per CR24-.. – Wire sizing values for control devices, VAV controllers, damper actuators, valves etc. can be found in the latest data sheets and product information (www.belimo.com) – Other devices to be operated with the AC 24 V supply –...
  • Page 27 – Quality of the wiring and connections orange flashing flashing permanently on – Cable length/diameter and the transformer si- AUTO green permanently off flashing permanently on zing. <20 V 20...22 V >22 V www.belimo.com...
  • Page 28 To activate these outputs again, the potentiometer must be reset via the “0” position to the heating range. –1 W = X –2 –3 Potentiometer (setpoint adjustment) for simulating the room temperature II III –3 max. 15 s www.belimo.com...
  • Page 29 www.belimo.com...
  • Page 30 www.belimo.com...
  • Page 31 www.belimo.com...
  • Page 32 Tested quality product life. Belimo does indeed include everything. The “small” Belimo devices have a big impact on comfort, energy Short delivery times efficiency, safety, installation and maintenance. In short: Small devices, big impact.

This manual is also suitable for:

Cr24-b1Cr24-a1Cr24-b2Cr24-a2Cr24-b2eCr24-a2e ... Show all

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