Siemens POL638 Series

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Siemens Standard application AHU CE1P3977en_02
Building Technologies Functions 01.02.2010
Stage3 1 0 1
Fan control mode = Direct/DirectVar
DO1 DO2 DO3
Off 0 0 0
Stage1 1 0 0
Stage2 0 1 0
Stage3 0 0 1
– DO1 each for supply fan and exhaust fan (if
selected)
– DO2, DO3: Combined output for both fans
Fan control mode <> Direct/DirectVar, Fan steps freq conv = 1
In this case, fan steps freq conv = 1 has no impact, since output DO1 is al-
ways available for supply and exhaust air fan.
DO1
Off 0
Stage1 1
Stage2 1
Stage3 1
DO1 each for supply fan and exhaust fan (if
selected)
Fan control mode <> Direct/DirectVar, Fan steps freq conv > 1
DO1 DO2 DO3
Off 0 0 0
Stage1 1 0 0
Stage2 1 1 0
Stage3 1 0 1
– DO1 each for supply fan and exhaust fan (if
selected)
– DO2, DO3: Combined output for both fans
Fan control mode = Direct/DirectVar
DO1 DO2
Off 0 0
Stage1 1 0
Stage2 0 1
Stage3 1 1
DOs each for supply fan and exhaust fan (if
selected)
For all frequency controlled fans: Stage = active setpoint
5.4.3 Supply / Exhaust fan Control
Supply air fan is always available; cannot be disabled. Only the exhaust air fan
must be enabled:
Main Index > Configuration > Configuration 1
Parameter Range Function
Exhaust fan – No
– Yes
– Combined
– No exhaust air fan.
– Exhaust air fan with separate outputs.
– Exhaust and supply air fan with common outputs.
Fans can be operated staged, pressure-controlled, flow controlled and as master-
slave. Common or separate outputs are used depending on the configuration.
Fans may include an alarm and/or active feedback contact.
Up to 3 setpoints per fan can be defaulted for controlled fans and achieving the
setpoints can be monitored.
You can influence the fan stage (speed) by room temperature, air quality, humidity,
outside air temperature or supply air temperature.
Fan steps type =
SepCombine
Fan steps type = Binary
Note
Configuration
Function
Function (cont.)
Basis Document Siemens Climatix Control System
BDCX.100820.01GB
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