Belimo CRK24-B1, Technical Data Manual

Page: 12 / 20

12 / 20
S4-CRK24-B1 • en • v1.2 • 06.2016 • subject to changes
www.belimo.eu
CRK24-B1
Functions
Chilled ceiling with dew point limiter Digital input di2
If the optional connectable dew point limiter responds, then the output
ao1 is overridden to 6 V by means of the input di2 (external dew point
limiter). The 6-way ball valve moves into neutral position.
Typical applications
Chilled ceiling systems in which one dew point limit is required.
1 2 7
~
~
ao1 U5
1
4
di2
AC 24 V
CRK24-B1
1 2 5
U5
6
3
Y
Belimo actuator for 6-way valve
Cooling / Heating
Dew point reached
Dew point
l
[V]
ao1
10
7.3
4.7
2
0 10 33 66 90 100 [%]
ao1
(heating)
ao1
(cooling)
Dew point
External setpoint shift Analogue input ai2
1 2
5
0 … 10 V
ai2
AC 24 V
CRK24-B1
~
An external DC 0...10 V signal at the analogue input ai2 can be used to
raise the basic setpoint by 0 ... 10 K (corresponding to
0 … 10 V).
Typical application
Summer/Winter Compensation
W [°C]
S [V]
5.0 0
26
21
16
10
Notes
A negative shift is possible by setting the basic setpoint to the desired
final setpoint, e.g. from 21°C (default value) to 16°C. This results in the
following correspondences:
– 0 … 5 V: 16 … 21°C and
– 5 … 10 V: 21 … 26°C (see illustration at the left).
Legend
W Setpoint
S
Shift signal
Setpoint shift