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Siemens Standard application AHU CE1P3977en_02
Building Technologies Configuration 01.02.2010
Parameter Range Explanation
The setting only makes sense when the sensor is mounted in the
duct and night start operations (e.g. night cooling) is used or as
safety function for the pump start at a low outside air temperature.
Room hum Sensor No
Yes
Input for room humidity sensor.
Supply hum sensor No
Yes
Input for supply air humidity sensor.
Outs air hum sensor No
Yes
Input for outside air humidity sensor.
Functions
Damper Open/close damper.
No No dampers.
Combined Two dampers with only one common output.
Supply Supply air damper with output.
Supply+Exh Two dampers with separate outputs.
Exhaust fan Exhaust air fan (supply air fan is always available; cannot be dis-
abled).
No No exhaust air fan.
Yes Exhaust air fan with separate output.
Combined Exhaust and supply air fan with common output.
Fan control mode Select fan and control type.
Positions SupplySlv and ExhaustSlv not possible without enabled
exhaust air fan.
Positions Direct and DirectVar possible if the exhaust air fan is pa-
rameterized as combined.
The exact number of outputs depends on the number of steps and
whether or not the exhaust air fan is enabled. The number of re-
quired inputs/outputs double if the fan is enabled with a separate
output.
The sensors required for control, e.g. pressure sensors, are en-
abled here as well.
Direct Up to 3 digital outputs each for stepped fans.
DirectVar Up to 3 digital outputs each for stepped controlled variable speed
fans.
FixedSpeed One digital and analog output each for analog – modulating con-
trolled variable speed drives (e.g. St1 = 2V, St2 = 5V, St3 = 8V).
Pressure One digital and analog output each and one analog input each for
variable speed drives in pressure-controlled plants.
Flow One digital and analog output each and one analog input each for
variable speed drives in flow-controlled plants.
SupplySlv One digital and analog output each and three analog inputs for the
variable speed drives in pressure-controlled plants where the sup-
ply air fan operates dependent on the exhaust fan.
ExhaustSlv One digital and analog output each and three analog inputs for the
variable speed drives in pressure-controlled plants where the ex-
haust air fan operates dependent on the supply air fan.
Tmp control mode Select control algorithm for temperature control.
Supply Supply air temperature control only.
RmSplyC Room / supply air temperature cascade control.
RtrnSplyC Return / supply air temperature cascade control.
RmSplyC Su Room / supply air cascade control during the summer; supply air
temperature control only during the winter.
Basis Document Siemens Climatix Control System
BDCX.100820.01GB
Page 156
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