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Siemens
RXB (KNX) application library
FNC Description of functions for FC-10, FC-11, FC-12
CM110385en_05
Building Technologies
General and central functions
28 Feb 2009
100
0
TR
Y [%]
103
85D
23
en
SpH
Pcf
SpC
Pcf
Fan
Heating
coil
The following conditions must be fulfilled:
– The room controller must be in
Economy
mode.
The function can be disabled in the room controller by means of the ETS3 tool.
The function must be enabled via the building automation and control system
(communication object
Application mode
, see page 128).
The function is disabled via the building automation and control system.
11.9 Night purge (Night Purge, 4), (FNC10, FNC12)
This function is used to cool rooms to the
Comfort
cooling setpoint, in readiness for
normal occupancy, using the outside air damper. Here, only the fan is active, not the
cooling coil.
Objective: Save energy by using "free of charge", cold outside air.
100
TR
0
Y [%]
SpH
Cmf
SpC
Cmf
10
28
5D
24
Ventilator
The following condition must be fulfilled:
– FNC must have an outside air damper.
– The outside air damper must not be disabled
– The room controller must be in
Economy
mode.
– The outside air temperature must be lower than the room temperature
(Hysteresis = 1K)
The function can be disabled in the room controller by means of the ETS3 tool; see
Central functions, page 123.
The function must be enabled via the building automation and control system
(communication object
Application mode
, see page 128).
– The function is disabled via the building automation and control system.
– When the outside air damper is disabled
Enabling the function
Initiating the function
Terminating the function
Enabling the function
Initiating the function
Terminating the function
