Belimo CRK24-B1 Gebrauchsanweisung
www.belimo.eu S4-CRK24-B1 • en • v1.2 • 06.2016 • subject to changes 1 / 20
Table of contents
Overview of the system 2
Brief description, Accessories 3
Technical data sheet
Technical data 5
Safety notes 5
Product features 6
Configuration 6
Electrical installation 6
Operation 7
Functions
Introduction 9
Function overview 9
Setpoint determination 10
Pre-comfort 11
Energy hold off (EHO) 11
Chilled ceiling with dew point monitoring 12
External setpoint shift 12
External temperature sensor (ai1) 13
Analogue outputs 13
Dimensions, installation, commissioning, service
Dimensions [mm] 15
Mechanical installation 15
Electrical installation 15
Design for supply / wire sizing 16
Commissioning / Power On response 16
Test and simulation mode 16
Internal Function test 17
Simulation control sequence 17
Product information CRK24-B1
Temperature controller for
heated/chilled ceiling systems
CRK24-B1 Overview of the system
2 / 20 S4-CRK24-B1 • en • v1.2 • 06.2016 • subject to changes www.belimo.eu
Heated/chilled ceiling applications
Single room controller
Accessories
CRK24-B1
6-way ball valve and rotary actuators
EXT-K3B2-..-.. + LR24A-MP / LR24A-SR
Diagnostic and setting device
ZTH EU
Setting for MP / MFT(2) actuators
PC-Tool
Connection cable ZTH-VAV to CRK24, Diagnostic socket 1/2
ZK1-VAV
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CRK24-B1 Brief description, Accessories
Brief description
The room temperature controller CRK24-B1 is precisely designed for the regulation of heated /
chilled ceilings. The output sequence of the controller is calibrated to the new 6-way ball valve
R3015-..-..-B2 / R3020-..-..-B2 with LR24A-MP / LR24A-SR actuator. This controller should
therefore only be utilised in the actuator in combination with the 6-way ball valve.
The multitude of override features makes possible an economically and energetically optimised
system solution for individualised control of the room climate.
Device
Standard model CRK24-B1 with user interface (setpoint
adjustment, mode switch and status display). For operation,
see page 7.
Accessories
Mechanical accessories Type Description
CRZA-A Spare cover without user interface
CRZW Spare baseplate
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4 / 20 S4-CRK24-B1 • en • v1.2 • 06.2016 • subject to changes www.belimo.eu
CRK24-B1
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Technical data sheet CRK24-B1
Technical data
Electrical data Nominal Voltage AC 24 V 50/60 Hz
Dimensioning 3 VA, without actuators
Power supply range AC 19.2 … 28.8 V
Connections Terminal block 1 … 3: 2.5 mm2
Terminal block 4 … 8: 1.5 mm2
Functional data Control characteristics P
– P-band heating / cooling Selectable: 2.0 K / 1.0 K or 4.0 K / 2.0 K
External temperature sensor (ai1) Type NTC, 5 k�, Power supply range 10 … 45°C
e.g. Belimo Type TFK
Setpoint Adjustment range 15 … 36°C (Default 21°C)
– Energy hold off (EHO)
– Pre-comfort
Heating 15°C / Cooling 40°C
Heating –3 K / Cooling +3 K
Dead band 1 K
Frost protection limit 10°C
Operation
– Mode switch and status display (LED) AUTO (green) – ECO (orange) – MAX (red)
– Rotary knob for setpoint adjustment ±3 K
Communication connection for field devices 2 x PP (for PC-Tool, ZTH EU, etc.)
Inputs 2 x analogue, 2 x digital
– External temperature sensor (ai1) Type NTC, 5 k�, Power supply range 10 … 45°C
– External setpoint shift (ai2) 0 … 10 V correspond to: 0 … 10 K
– Digital inputs (di1, di2,) Contact rating 10 mA
Output 1x analogue
– 6-way ball valve (ao1) (0) 2 … 10 V, max. 5 mA
Norms and Standards Protection class III Safety extra-low voltage
Degree of protection IP30 (EN 60529)
Mode of operation Type 1 (EN60730-1)
Software class A (EN 60730-1)
EMC CE according to 2004/108/EU
Ambient conditions
– Operation 0 … +50°C / 20 … 90% r.h. (non-condensating)
– Transport and storage 25 … +70°C / 20 … 90% r.h. (non-condensating)
Dimensions / Weight Dimensions (H x W x D) 99 x 84 x 32 mm
Weight 105 g
Housing colour Baseplate NCS2005-R80B light grey (corresponds approximately
to RAL 7035)
Cover RAL9003 signal white
Temperature controller for single-room
applications with one analogue output:
• The 6-way ball valve for the regulation of
a heated/chilled ceiling can be connected
with the analogue output ao1.
Safety notes
!
• The controller is not allowed to be used outside the specified field of application, especially
in aircraft or in any other airborne means of transport.
• It may only be installed by suitably trained personnel. Any legal regulations or regulations
issued by government agency authorities must be observed during assembly.
• The device does not contain any parts that can be replaced or repaired by the user.
• The device contains electrical and electronic components and is not allowed to be disposed
of as household refuse. All locally valid regulations and requirements must be observed.
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6 / 20 S4-CRK24-B1 • en • v1.2 • 06.2016 • subject to changes www.belimo.eu
CRK24-B1 Technical data sheet
Product features
Energy hold off
(EHO)
In energy saving mode, the room temperature is regulated to the building protection level, i.e.
the heating setpoint is significantly reduced or the cooling setpoint is significantly increased, for
instance in a room with an open window.
Pre-comfort The room temperature is reduced to stand-by level, i.e. the heating setpoint is slightly reduced
and/or the cooling setpoint is slightly increased, for instance in a room that is temporarily
unoccupied.
Frost If the current room temperature falls below 10°C, then the frost function will be activated.
Dew point limitation If the optional connectable dew point limiter responds, then the valve is moved into neutral
position.
External temperature sensor An external temperature sensor can be connected at analogue input ai1.
External setpoint shift An external DC 0 ... 10 V signal at the analogue input ai2 can be used to shift the basic setpoint
by 0 ... 10 K, e.g. for summer/winter compensation.
The functions are described in detail on pages 9 to 13.
Electrical installation
Wiring diagram
U5
CRK24-B1
EHO
13
y
5
U
2
~
AC 24 V
0 … 10 V
12 7 86
ao1
1
U5
2
4
di2
3
5
ai1/di
1a
i2
~
Notes
• Connect via safety isolation transformer.
• Parallel connection of other actuators possible.
Note the performance data.
!
Configuration
Configuration ao1 modulating ao1 On/Off
1 2 3 4 5 6
ON
OFF
l
[V]
ao
1
10
7.3
4.7
2
0 10 33 66 90 100 [%]
l
[V]
ao
1
10
6
2
0 10 33 66 90 100 [%]
Shifting
Pre-comfort
Dew point limiter
Actuator for 6-way valve
External NTC
temperature sensor
DIP
Default settings
1 P-Band normal P-Band wide
2 Output ao1 modulating Output ao1 On/Off
ao1
(heating)
ao1
(cooling)
ao1
(heating)
ao1
(cooling)
Inputs Outputs
3ai1 External temperature sensor 6 ao1 System output for 6-way valve
di1 Pre-comfort Other connections
4 di2 Energy hold off / dew point 7 PP1 Diagnostic socket 1
5 ai2 External setpoint shift
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Operation CRK24-B1
1
2
3
4
5
6
7
8
21
Mode switch and status display
Selection can be made between three operating modes:
• AUTO – optimum comfort mode
The room will be kept at comfort zone status insofar as the external
control signals permit this. All control functions are enabled.
• ECO – optimum energy mode
The room will be kept at pre-comfort status insofar as the external
control signals permit this. Reduced heating (–3 K) and elevated
cooling setpoints (+3 K) are in effect in this status. Starting from this
status, the room can be returned to comfort status within a short time.
Sequence control is enabled. The operating mode ECO is intended
for rooms not continuously occupied and/or for reduced requirements.
• MAX – Boost function
The room will be heated or cooled at maximum power, insofar as the
external control signals permit this.
The Boost function is switched off:
– Timer off
– Setpoint is reached
– Selection of a different mode (AUTO or ECO)
Measuring point terminals
Measuring points for all connection terminals (also during operation).
Internal function test
A comprehensive internal function test can be started with the mode
switch which makes it possible to check the controller, including
nominal voltage (AC 24V). The three LEDs (status display) are used
thereby to display the voltage level and the statuses.
Simulation control sequence
The rotary knob for the setpoint adjustment can be used to simulate
the connected actuators, and thus the heating and cooling control
sequences, independent of the room temperature.
ZTH EU / PC-Tool connection
The diagnostic socket 1 is used for PP communications with the
connected Belimo MFT actuator. Physical access to the valve actuator
can be dispensed with as a result.
Operating level 1 – Operation Operating mode / Setpoint
DIP switch for configuration
DIP switches 1 and 2
Basic setpoint setting WH (heating setpoint)
Potentiometer 15 … 36°C (Default 21°C)
Label for settings
Recording the settings used
(DIP switch and basic setpoint)
Operating level 2 – Configuration Application / Parameters
Operating level 3 – Service Test / Simulation
Rotary knob for setpoint adjustment
Potentiometer ±3 K
Mode switch
• MAX
• ECO
• AUTO
Status display
• MAX (red)
• ECO (orange)
• AUTO (green)
O
rder-Nr
.
Order-Nr.
CR24-B2xxxxx
W
H
U5/
2
U5/
1
12
ON
OFF
21
36
15
Measuring point
terminals
ZTH EU / PC-Tool connection
Internal function test
Basic setpoint settingDIP switch for configuration
Label for settings
1
2
3
4
5
6
7
8
Rotary knob for
simulation of control sequence
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CRK24-B1
www.belimo.eu S4-CRK24-B1 • en • v1.2 • 06.2016 • subject to changes 9 / 20
Functions CRK24-B1
Introduction
The control functions of the CRK24-B1 define the behaviour of the controller output or influence
the current setpoint, respectively.
Operation can be automated and comfort and energy savings potential enhanced through the
utilisation of corresponding sensor mechanisms at the input side.
The corresponding functions are described in detail in the following.
Function overview CRK24-B1
Supply AC 24 V / 50/60 Hz
Application – Room temperature controller in the comfort zone
– Internal temperature sensor (Type NTC, Power supply range 10 … 45°C)
– Setpoint (adjustment range 15 ... 36°C)
Operation – Mode selection switch: AUTO – ECO – MAX
– Mode display LED: AUTO – ECO – MAX
– Setpoint adjustment rotary knob ±3 K
Inputs – Pre-comfort
– Dew point limitation
– Energy hold off (EHO)
– External temperature sensor (Type NTC 5 kΩ, Power supply range 10 … 45°C)
– External setpoint shift 0 … 10 V
Output – 2 … 10 V System output: Belimo 6-way ball valve
Functions – Control characteristics: P
– P-Band, switchable
– Output can be switched (modulating / On/Off)
– Room temperature monitoring (frost)
– Internal Function test with nominal voltage check
– Commissioning mode with simulation of output and sequence
– Diagnostics via integrated PC-Tool connection
Installation Surface mounting with flush-mounted or surface-mounted connection
Application documentation
Continually expanded, comprehensive documentation with specific applications is available for the
CRK24-B1 controller.
10 / 20 S4-CRK24-B1 • en • v1.2 • 06.2016 • subject to changes www.belimo.eu
CRK24-B1 Functions
Operating status Heating setpoint Cooling setpoint
Comfort Basic setpoint WH
±3 K setpoint adjustment
+ Setpoint shift 0 … 10 V
Comfort-Heating setpoint WA
+1 K dead band
Pre-comfort Comfort-Heating setpoint WA
– 3 K Pre-comfort-Offset heating
Comfort-Heating setpoint WA
+1 K dead band
+3 K Pre-comfort-Offset cooling
Energy hold off fix 15°C (building protection) fix 40°C (building protection)
Frost fix 10°C without function
Setpoint calculation
Examples Comfort Pre-comfort
Y
tR
+1 K dead band
23°C Comfort setpoint WA
Y
tR
+1 K dead band
23°C Comfort setpoint WA
+3 K Pre-comfort-Offset
Cooling
–3 K Pre-comfort-Offset
Heating
[%]
100
0
EHO
Valve opening
tRoom [°C]
Dead band
WH Basic setpoint
WA current setpoint
Pre-comfort
Frost
Dew point
Ws Setpoint shift 0 … 10 V
Setpoint adjustment ±3 K
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