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Siemens Standard application AHU CE1P3977en_02
Building Technologies Functions 01.02.2010
– Main Index > Unit > Fan Control > Summer comp
– Main Index > Unit > Fan Control > Winter Comp
Parameter Range Function
Outside tmp start -64…64 [°C] Outside air temperature at which point the compensation begins to
act.
Outside tmp end -64…64 [°C] Outside air temperature by which the maximum (summer) or mini-
mum setpoint is reached.
Delta -100…100 [%] Fan setpoint compensation relating to the maximum allowed fan
compensation (See Fan compensation as well).
Setpoint compensation is not undertaken during the summer and winter when the
outside air temperature sensor fails. Minus value means that the fan is decreased,
plus value means that the fan is increased.
For Fan control mode = Direct, DirectVar, the delta must be set to -100% or 100%
due to that a switch up or down takes place when the total added compensations is
above 90% (switch back at 10%), but could be less if other compensations is
active.
5.4.5 SupplyFan / Exhaust fan Deviation alarms
– Main Index > Configuration > Configuration 1 > Fan control mode <> Direct,
DirectVar oder FixedSpd
– Fan deviation alarm must be enabled:
Main Index > Configuration > Configuration 2 > Fan deviation alarm <> No
Setpoint/actual value monitoring of air control: An alarm is triggered for the follow-
ing cases when the air pressure (or dws volume) deviates from the setpoint during
a certain period:
– Actual value < Min Limit (Is also used as feedback if act value > Min limit, for
example to enable electrical heating)
– Actual value > Setpoint + maximum.
– Actual value < Setpoint – maximum.
– When setpoint – maximum < Min Limit, Min Limit applies as the comparison
value.
– Main Index > Unit > Fan Control > Supply Fan > Setpoints/Settings > Deviation
alarm
– Main Index > Unit > Fan Control > Exhaust fan > Setpoints/Settings > Deviation
alarm
Parameter Range Function
Alarm – Passive Alarm state. Go to settings page for digital alarms. Set all
Setpoint compensation
during the winter.
Parameterization
Note
Prerequisites
Function
Function (cont.)
Parameterization
Basis Document Siemens Climatix Control System
BDCX.100820.01GB
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