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Siemens
Standard application AHU
CE1P3977en_02
Building Technologies
Configuration
01.02.2010
Parameter
Range
Explanation
2Steps
TSP function = Steps ---> Possible time switch program settings:
Off, St1, St2.
TSP function = Steps+tmp ---> Possible time switch program set-
tings: Off, Eco1, Eco2, Com1, Com2.
3Steps
TSP function = Steps ---> Possible time switch program settings:
Off, St1, St2, St3.
TSP function = Steps+tmp ---> Possible time switch program set-
tings: Off, Eco1, Eco2, Eco3, Com1, Com2, Com3.
Example 1
Example 2
TSP function = Steps, TSP steps = 2Step.
Fan control using 2 setpoints for St1 and St2. Temperature control
using a setpoint for Comfort mode.
TSP function = Steps+tmp, TSP steps = 3
Fan control using 3 setpoints for St1 and St2 and St3. Temperature
control using separate setpoints for Eco and Comfort.
Under Eco2, the plant operates using the temperature setpoint for
Eco and the fan setpoint St2.
Ext control input
No
No external input for operating mode switch, timer, button, occu-
pancy detector, etc.
One
One input (e.g. off / on).
Two
Two inputs (e.g. Auto / Off / St1 / St2).
Alarm outputs
No
No alarm output.
One
One output (e.g. for high alarms).
Two
Two outputs (for high and low alarms).
External setpoint
No
No analog input for connect an external setpoint or an external
setpoint compensation.
Volt
Input for one 0-10V DC signal.
Ohm
Input for one 0-2500 Ohm signal.
QAA27
Input for QAA27.
BSG21
Input for BSG21 setpoint compensation.
Sensors
Room tmp Sensor
No
1 sensor
2 sensor
1 RU
1snsr+1RU
2 RU
Inputs for room temperature sensor. You can select whether to ap-
ply maximum, minimum, average or individual value for control for
more than one sensor in Configuration 2. When selecting 1 RU,
1snsr+RU or 2 RU, the interface to the room unit connection is en-
abled.
Exhaust tmp sensor
No
Yes
Input for return air sensor.
Yes+Hold
The maximum, otherwise present temperature is stored when shut-
ting down the plant, to the extent the plant ran for more than 5
minutes.
The setting only makes sense when there is no room sensor and
night start operations (e.g. night cooling) without plant kick are to
be used. (Plant kick: Short, cyclical plant start to update the values
of the sensors mounted in the duct).
Supply tmp sensor
No
Yes
Input for supply air sensor.
Outs air tmp Sensor
No
Yes
Input for outside air temperature sensor.
Yes+Hold
The minimum, otherwise present temperature is stored when shut-
ting down the plant, to the extent the plant ran for more than 5
minutes.
Basis Document Siemens Climatix Control System
BDCX.100820.01GB
Page 155
