Belimo CR24 Series, Product Information

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Dimensions, installation, commissioning, service
CR24-..
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Pr
oduct information S4-CR24-.. • en • v2.3 • 08.2022 • Subject t
o changes
Commissioning / Power on behaviour
Commissioning
1. Assemble the baseplate of the housing and connect the cables (see page 15).
2. Configure the DIP switches on the printed circuit board according to the required application.
3. Assemble the printed circuit board on the baseplate of the housing and then mount the
housing cover (see page 15).
4. Switch on the nominal voltage (AC 24 V).
5. Optional: start the test and simulation mode (see below).
When the voltage is applied, the system starts operating normally in AUTO mode (unless the test
and simulation mode is selected). The
active operating status is determined primarily by the configuration of the DIP switches and the
status of the inputs
Power on behaviour
After power on of the voltage supply the output gets initialized as
follows:
– ao1 = 0 V
– ao2 = 0 V
– ao3 = closed (200 s)
Subsequently the controller switches automatically to the control mode.
Test and simulation mode
All controllers are supplied with two auxiliary programs for commissioning and servicing:
– Internal function test
– Control sequence simulation
Activating test and simulation mode
The test and simulation mode of CR24-B.. controllers can be activated easily with the mode
switch on the operator panel. With CR24-A.. controllers, the housing cover must be removed first.
To activate test mode
1. Set the mode switch to MAX
– The red LED (MAX status indication) lights up
2. Keep the mode switch pressed for ten seconds
– The internal function test is activated (see below)
To activate simulation mode
3. Press the mode switch again briefly (for approximately one second)
– The green LED (AUTO status indication) flashes
– Control sequence simulation is activated (see below)
Deactivating test and simulation mode
The test and simulation mode can be deactivated either by pressing the mode switch again for
ten seconds or by interrupting the power supply. It is also deactivated automatically 15 minutes
after the last user action (auto-reset).
Internal function test
The internal function test tests the nominal voltage that is connected to the controller (AC 24 V),
in other words the complete electrical wiring system from the control cabinet to the controller.
The three LEDs (status indication) indicate the voltage level (see below) and states during the test.
Nominal voltage (AC 24 V)
LED (status indication) Scenario A Scenario B Scenario C
MAX red flash flash permanently on
ECO orange flash flash permanently on
AUTO green permanently off flash permanently on
<20 V 20...22 V >22 V
Note
Case B and C do not need further attention. In case
A (<20 V) attation must be paid to the following
points:
– Quality of the wiring and connections
– Cable length/diameter and the transformer sizing.