Heating Circuit Control; Attenuated Outside Temperature - Siemens LMU54 Series Basic Documentation

Attenuated outside
temperature
Benefit
Description
Setting
Process
Effect
Example
70/171
Siemens Building Technologies
HVAC Products

3.9 Heating circuit control

From the entries made by the endusers, room control determines the demand signal
delivered by the associated heating system. This takes place based on the results
obtained from weather compensation, switching programs, ECO functions, etc.
• Consideration is given to the building's thermal storage capacity
The attenuated outside temperature is the simulated room temperature of a fictive
building that has no heat source and that is solely influenced by the prevailing outside
temperature.
No direct setting is possible. Generation of the attenuated outside temperature cannot
be influenced in any way.
The attenuated outside temperature is generated by the controller itself. It is calculated
at 10-minute intervals based on the actual outside temperature.
The attenuated outside temperature has a direct impact only on S / W changeover.
It acts indirectly on the flow temperature control via the composite outside temperature.
Ta
°C
17
16
15
14
13
18:00 06:00
TiAussen Actual outside temperature
TaGed

Attenuated outside temperature

Basic Documentation LMU54... / LMU64...
3 Functions
TiAussen
TaGed
18:00 06:00
t
18:00
CC1P7494en
07.11.2002