Free Cooling (Freecool, 10) - Siemens Desigo RXB Technical Manual

Technical manual
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Enabling the function
Initiating the function
Terminating the function
Enabling the function
Initiating the function
Terminating the function
Siemens
Building Technologies
Y [%]
0.5K
100
0
SpH
Eco
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 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 terminated:
– when the controller switches from Economy or Precomfort to another operating
mode.
– when the function is disabled via the building automation and control system
– when the safety thermostat in the outside air duct indicates frost (see also
"Alarming", below).

11.14 Free cooling (Freecool, 10)

This function is used to precool rooms to the Comfort cooling setpoint, in readiness for
normal occupancy. It uses both fan and cooling coil.
This function is meaningful only if low-tariff energy is available.
During occupancy ( Comfort / Precomfort ) normal mode applies.
Y [%]
100
0
SpH
SpC
Cmf
Cmf
The function can be disabled in the room controller by means of the ETS3 tool ,
together with Pre-cooling, 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.
RXB (KNX) application library
General and central functions
TR
SpC
Eco
TR
FNC Description of functions for FC-10, FC-11, FC-12
Fan
Fan
Cooling coil
133/166
CM110385en_05
28 Feb 2009

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Desigo rxc, desigo rxb, desigo rxl, desigo rxa

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