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Siemens Standard application AHU CE1P3977en_02
Building Technologies Functions 01.02.2010
Parameter Range Function
Act sply dehum stpt 0.0...100.0 [%rH] oder
[g/kg]
Actual calculated supply air humidification setpoint for a
cascade control (%rH or g/kg).
Act sply hum stpt 0.0...100.0 [%rH] oder
[g/kg]
Actual calculated supply air humidification setpoint for a
cascade control (%rH or g/kg).
Setpoint 0…100 [%rH] Base setpoint. Only available when Hum stpt selection =
+/-Half degree Celsius.
Dead zone 0…100 [%rH] Comfort dead zone. Only available when Hum stpt selec-
tion = Dehum -degrees Celsius or Hum+degrees Celsius
or +/-half degree Celsius.
Dehum stpt 0…100 [%rH] Setpoint for dehumidification. Only available when Hum
stpt selection = Hum/dehum or dehum/-degree Celsius.
Hum stpt 0…100 [%rH] Setpoint for humidification. Only available when Hum stpt
selection = Hum/dehum or Hum/-degree Celsius.
Setpoint 0…100 [g/kg] Base setpoint. Only available when Hum stpt selection =
+/-Half degree Celsius.
Dead zone
0…100 [g/kg] Comfort dead zone. Only available when Hum stpt selec-
tion = Dehum -degrees Celsius or Hum+degrees Celsius
or +/-half degree Celsius.
Dehum stpt 0…100 [g/kg] Setpoint for dehumidification. Only available when Hum
stpt selection = Hum/dehum or dehum/-degree Celsius.
Hum stpt 0…100 [g/kg] Setpoint for humidification. Only available when Hum stpt
selection = Hum/dehum or Hum/-degree Celsius.
Sply hum min stpt 0…100 [%rH] Lowest allowable supply air humidity for a cascade con-
trol.
Sply hum max stpt 0…100 [g/kg] Highest allowable supply air humidity for a cascade con-
trol.
Sply hum max stpt 0…100 [%rH] oder [g/kg] Highest allowable supply air humidity for pure cascade
control for room humidity control with supplemental avail-
able supply air humidity sensor. Limited control of the
humidity controller occurs for supply air humidity > Sup-
ply hum min.
Sply hum dev alarm
--- Go to parameter page for supply air humidity monitoring.
Room hum dev alarm
--- Go to parameter page for room humidity monitoring.
5.11.3 Humidity deviation alarms
Supply air humidity deviation alarm:
• A supply air humidity sensor must be available:
Main Index > Configuration > Configuration 1 > Supply hum sensor = Yes.
• Deviation alarm must be enabled:
Main Index > Configuration > Configuration 2 > Deviation alarm hum <> No.
Room air humidity deviation alarm:
• A room air humidity sensor must be available:
Main Index > Configuration > Configuration 1 > Room hum Sensor = Yes.
Setpoint/actual value monitoring of humidity: An alarm is triggered for the following
cases when the humidity deviates from the setpoint during a certain period:
– Actual value < Min limit.
– Actual value > Setpoint + maximum.
– Actual value < Setpoint – maximum.
– When setpoint – maximum < Min limit, min limit applies as the comparison value.
Prerequisite
Function
Basis Document Siemens Climatix Control System
BDCX.100820.01GB
Page 86
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