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Siemens
RXB (KNX) application library
FNC Description of functions for FC-10, FC-11, FC-12
CM110385en_05
Building Technologies
Fan control
28 Feb 2009
The fan can be enabled at the lowest speed at regular intervals. While the room
temperature remains between the effective setpoints SpH and SpC, fan speed 1 is
always on for the predefined minimum runtime after expiry of the duty cycle.
Y
t [h:mm]
Q14
0
10385D22en
Periodic fan kick
Minimum on
time
Periodic fan
kick
Minimum on
time
Parameter
Basic setting
Range
Resolution
Periodic fan kick
Comfort
OFF (90 min) 1)
0 ... 89 min ; Aus
1 min
Periodic fan kick
Economy
OFF (360 min) 1)
0 ... 359 min ; Aus
1 min
1) HandyTool and ACS: 90 min / 360 min = OFF
•
If the
Periodic fan kick
is set to 0, then fan speed 1 remains on continuously between
the effective setpoints SpH and SpC.
•
With a setting of 90 min. (or 360 min), the display changes to "Off".
This indicates that the function is disabled.
•
When the measured temperature moves outside the dead band, i.e. above or below
the effective heating/cooling setpoint, the fan switches on before the periodic fan kick
has expired.
•
When the room operating mode switches from
Economy
to
Precomfort
or between
Precomfort
and
Comfort
, fan speed 1 is enabled for the minimum runtime and the
periodic fan kick starts.
•
A QAX34.1 room unit displays the value of B1.
Function
Notes