Belimo CR24 Series, Информация о продукте

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Functions
CR24-..
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Pr
oduct information S4-CR24-.. • en • v2.3 • 08.2022 • Subject t
o changes
If the selected application requires an increased air volume for heating,
e.g. for:
– Provision without assisting heating with air
– Improving the air quality during heating
Electric air heater CR24-B2E only
1 2
3
ai/di1
NTC
CR24-B..
AC 24 V
T
~
An external NTC temperature sensor can be connected to the analog
input ai1.
Typical application
A temperature sensor measures the average room temperature in the
exhaust air duct.
Notes
– The internal sensor automatically detects the presence of an external
sensor.
– It is possible to install an energy hold off switch simultaneously at di1,
in which case the system changes over to the internal sensor (see al -
so "Energy hold off"). This permits the actual room temperature to be
monitored in order to protect the building.
External
temperature sensor
External temperature sensor Analog input ai1 CR24-B1, CR24-B2, CR24-B3
[°C]
30
40
50
60
70
80
[°C]
30
40
50
60
70
80
An external NTC temperature sensor can be connected to the analog
input ai1. Sensor type: NTC 5k (5 kΩ)
Function: The temperature of the supply air is limited by shedding indi -
vidual load increments if the maximum temperature is exceeded. This
results in an almost modulating control characteristic.
Benefits: Increased comfort and economical energy consumption
Notes
– The controller automatically detects the presence of a supply air limi-
tation sensor.
– Combined application with EHO switch:
EHO active = supply air temperature limitation not active
Supply air temperature limitation Analog input ai1 CR24-B2E only
1 2
3 4 5
AC 24 V
NTC
CR24-B2E
ai/di1 di2
12
di3 ai2
T
~
Time
Supply air
temperature
Mean value 45...46°C
Supply air
temperature
Time
EHO
II
I
Y [V]
t
R
[°C]
10
8.4
2
0
do3
X
P
H
X
P
C
ao1
W
H
W
C
V'
max
V'
min
closed
Volumetric flow
V'
max
H
Key
Y
Output signal
t
R
Room temperature
W
H
Setpoint Heating
W
C
Setpoint Cooling
X
P
H
P-band Heating
X
P
C
P-band Cooling
V'
max
H
V′
max
Heating
CR24-B2E configuration
This function is activated using DIP switch 2.
1 2
External
temperature sensor
Without supply air limitation With supply air limitation