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Siemens Standard application AHU CE1P3977en_02
Building Technologies Functions 01.02.2010
• Start/stop function = Off and Off delay = 0 ---> The command is issues as long
as the signal is pending.
• Start/stop function = Off and Off delay > 0 ---> The command is issued during
the off delay period for a pulse at the input. The timer restarts for each new
pulse on the input.
• Start/stop function = On and Off delay = 0 ---> The command is issued for a
pulse on the input and then reset against at the next pulse.
• Start/stop function = On and Off delay > 0 ---> The command is issued for a
pulse on the input and then reset against at the next pulse or after the off delay
period.
5.2.5 Night kick function
Function automatically enabled when the following conditions are met:
– Non room sensor available and
– the return tmp sensor is not parameterized as saved and
– Night cooling or start is enabled based on the temperature difference:
Main Index > Configuration > Configuration 1 > Room tmp sensor = No
and
Main Index > Configuration > Configuration 1 > Exh air tmp sensor = Yes
Und
Main Index > Configuration > Configuration 2 > Night cooling = Yes
Main Index > Configuration > Configuration 2 > Tmp start <> No
Plant kick ramps up the plant after a longer period of inoperation to update the
measured return temperature in the duct.
This temperature is used as the decision-making criterion to start night cooling or
temperature difference start and should be kept updated as much as possible.
Main Index > Unit > Operating mode > Night kick exh tmp
Parameter Range Function
Kick time
00:00...23:59 Time to execute kick.
Example:
23:00 Kick is run at 11:00 pm.
*:* Time is not relevant; the interval applies accord-
ingly.
Interval time 0.0…36000.0 [h] Interval time to execute kick.
Example:
3.0 Run every 3 hours.
0.0 Interval is not relevant; kick time applies accord-
ingly.
On time 0...36000 [s] Kick period.
Kick time = 23:00 / Interval time = 3 / On time = 300
---> The plant is switched-on for 300 seconds if the plant has been off for at least 3
hours as of 11:00 pm.
Kick time = *:* and interval time = 0.0 h ---> No plant kick is triggered.
Start/stop function and of
delay
Prerequisite
Function
Parameter
Example
Note
Basis Document Siemens Climatix Control System
BDCX.100820.01GB
Page 43
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