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Siemens
Standard application AHU
CE1P3977en_02
Building Technologies
Functions
01.02.2010
5.5.7 Fan compensation
Fan cmp room tmp enabled in configuration 2. No settings required for I/Os in con-
figuration 1 and configuration.
Main Index > Configuration > Configuration 2
Parameter
Range
Function
Fan comp room tmp
– No
– Yes
Room-temperature dependent fan compensation.
The controller output reduces or increases the fan setpoint relating to the maximum
allowable fan compensation (See as well Fan compensation).
The fan setpoints are increased or reduced if the room temperature is below the
setpoint when KP>0 or if the room temperature is above the setpoint when KP<0
(heating/cooling behavior).
Main Index > Unit > Temperature control > Fan compensation
Parameter
Range
Function
Controller
0…100 [%]
Present value for the controller. Go to controller set-
tings page.
Setpoint
0…99 [°C]
Controller setpoint relating to the room temperature.
Function
– Increase
– Decrease
– Increase the fan setpoint.
– Reduce the fan setpoint.
– Room temperature setpoint: 22 °C.
– Present room temperature: 20°C.
---> Controller output > 0 % (e.g. 50 %).
Switch function: Increase
The controller output increases the fan setpoint relating to the maximum allowable
fan compensation (See as well Fan compensation).
– Setpoint supply air pressure: 80 Pa (maximum possible setpoint = Setpoint of
the maximum enabled stage + Max Force, e.g. = 120 Pa).
– Maximum allowable fan compensation (100 % compensation): 40 %.
– Controller output: 50 %.
---> New setpoint = 80 Pa + (40 Pa * 50 %) = 100 Pa.
Switch function: Decrease
The controller output reduces the fan setpoint relating to the maximum allowable
fan compensation (See as well Fan compensation).
– Setpoint supply air pressure: 80 Pa (maximum possible setpoint = Setpoint of
the maximum enabled stage + Max Force, e.g. = 120 Pa).
– Maximum allowable fan compensation (100 % compensation): 40 Pa.
– Controller output: 50 %.
---> New setpoint = 80 Pa – (40 Pa * 50 %) = 60 Pa.
5.5.8 Combi coil
One heating register water and one cold water register for cooling is enabled.
Main Index > Configuration > Configuration 1 > Heating <> No
Main Index > Configuration > Configuration 1 > Cooling = Water
Prerequisite
Enable
Function
Parameterization
Example
Prerequisite
Basis Document Siemens Climatix Control System
BDCX.100820.01GB
Page 66
