Belimo CR24 Series, Product Information

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Overview of functions
CR24-..
4 www.belimo.com
Pr
oduct information S4-CR24-.. • en • v2.2 • 05.2010 • Subject t
o changes
Overview of CR24-B.. functions
CR24-B1 CR24-B2 CR24-B2E CR24-B3
Power supply AC 24 V / 50/60Hz
• • • •
Application / Temperature range
– Room temperature control in comfort zone
• • • •
– Internal temperature sensor (Type NTC, sensing range 10...45°C)
• • • •
– Setpoint (adjustment range 15...36°C)
• • • •
Operation (CR24-B.. only)
• • • •
– Mode selection Switch: AUTO – ECO – MAX
• • • •
– Mode indication LEDs: AUTO – ECO – MAX
• • • •
– Setpoint adjustm. Rotary knob: ±3 K
• • • •
Inputs Number 4 5 5 5
– Energy hold off
• • • •
– Stand-by
•
1)
• • •
– Change-over
•
1)
•
2)
– Chilled ceiling with dew point limiting and change-over
•
2)
– Air flush
• •
– Boost
• •
2)
– External temperature sensor (Type NTC, sensing range 10...45°C)
• • • •
– External setpoint shift 0...10 V
• • • •
Outputs Number 1 2 3 3
– (0)2...10 V system output for Belimo VAV controller or change-over
•
3)
– (0)2...10 V system output for Belimo VAV controller
• • •
– Heating output 3-point
• • •
– Electrical reheater 1...3 stages or on/off radiator valve
•
– Heating or cooling output, change-over 0...10 V
•
4)
Functions
– Control characteristics P P P P / PI
– P-band switchable
• • • •
– Boost function V'
max
or temperature-controlled, selectable
•
– Boost function temperature-controlled
•
– Volume increase in heating mode, selectable
• • •
– Internal function test, including nominal voltage test
• • • •
– Commissioning mode with output and sequence simulation
• • • •
– VAV controller diagnosis via integrated PC-Tool connection
• • • •
Mounting
Surface mounting with flush-mounted or surface-mounted connection
• • • •
Housing colors
Baseplate NCS2005-R80B light gray
(corresponds approx. to RAL 7035)
Cover RAL 9003 signal white
• • • •
1)
The stand-by input is not available in change-over (C/O) mode or in heating controller applications, as it is
assigned to the change-over input function. CR24-B3 should be used if the stand-by function is needed in a
change-over application.
2) The boost function is not available in change-over mode or in chilled ceiling applications with dew point
limiting. A combination of change-over and dew point limiting is possible.
3) The output can either be used as a common cooling and heating output in change-over mode or exclusively
as a cooling or heating output. The stand-by function is not available in change-over mode or in heating
controller applications.
4)
The output can either be used as a common cooling and heating output in change-over mode or exclusively
as a cooling or heating output.
Additional documentation
Comprehensive and regularly updated documentation with descriptions of specific applications is
available for all controllers.