Siemens Climatix Series Basis Document page 64

Parameter
Max setpoint
Prerequisite
Enable
Parameter
Fan htg / clg
Sequence fan clg
Function
Parameterization
Parameter
Controller
Deadzone
Heating example
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Basis Document Siemens Climatix Control System
Siemens
Page 64
BDCX.100820.01GB
Building Technologies
Range
Min setpoint...50 [°C]
5.5.6 Fan Heating / Cooling
Fan heating / cooling enabled in configuration 2. No settings required for I/Os in
configuration 1 and configuration.
Main Index > Configuration > Configuration 2
Range
– No
– Htg
– Clg
– Htg+Clg
–
– Fan-Clg
– Clg-Fan
Controller output reduced (increased during cooling) the fan setpoint as it relates to
the maximum allowable fan compensation (see Fan compensation as well) in the
event the supply air setpoint is not achieved.
The fan speed (stage) is reduced when all available heating registers are operating
at 100% during heating. This heats up the discharged air.
The fan speed (stage) is increased if all available cooling registers are operating at
100 % (Sequence fan clg = Clg-Fan) during cooling. This cools down the dis-
charged air. The fan speed (stage) is first increased during the sequence fan clg =
Fan-Clg and the first cooling register is switched on.
Main Index > Unit > Temperature control > Fan heating
Main Index > Unit > Temperature control > Fan cooling
Range
0...100 [%]
0...20 [°C]
– Calculated supply air setpoint for heating register: 22 °C.
– Dead zone for the fan heating controller (dead zone): 2 °C.
---> Effective setpoint for the controller = 22 °C – 2 °C = 20 °C.
Standard application AHU
Functions
Function
air temperature < Min setpoint. The heating register is
started if this is not enough.
Highest allowable supply air temperature for pure room
temperature or return air temperature control. A controlled
limiting of the heating controller occurs for supply air tem-
perature > Max setpoint.
Function
The fan is further used as a heating or cooling se-
quence.
– No sequential impact on the fan.
– Only impacts fan during the heating sequence.
– Only impacts fan during the cooling sequence.
– Impact on fan in both sequences.
For fan cooling only!
– Fan sequence prior to cooling sequence.
– Cooling sequence prior to fan sequence.
Function
Present value for the controller. Go to controller set-
tings page.
Controller dead zone heating: Setpoint = Supply air
setpoint – dead zone.
Controller dead zone clg: Setpoint = Supply air
heating setpoint + dead zone. Or if sequence is
placed last (Clg-Fan): Supply air cooling setpoint +
dead zone
CE1P3977en_02
01.02.2010