Operating Instructions

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Siemens RXB (KNX) application library RXB Description of functions for FC-10, FC-11, FC-12, FC-13 CM110385en_08
Building Technologies General and central functions 2013-06-17
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 P138 or the ETS tool,
see central functions, page 139.
The function must be enabled via the building automation and control system
(communication object Application mode, see page 145).
The function is disabled via the building automation and control system.
When the outside air damper is disabled
11.10 Precooling (Precool, 5)
This function is used to cool rooms to the Comfort cooling setpoint, in readiness for
normal occupancy. The fan and cooling coil are used here to precool the rooms.
100
TR
10385D25
0
Y [%]
SpH
Cmf
SpC
Cmf
Fan
Cooling coil
The following condition must be fulfilled:
The room controller must be in Economy or Precomfort mode.
The function can be disabled in the room controller by means of P135 or the ETS tool,
together with Free cooling, see central functions, page 139.
The function must be enabled via the building automation and control system
(communication object Application mode, see page 145).
The function is disabled via the building automation and control system.
Enabling the function
Initiating the function
Terminating the function
Enabling the function
Initiating the function
Terminating the function